My working unpac space for OCaml projects in development
Add bytecode compiler and interpreter for QuickJS
- Parser: Complete ES2024 JavaScript parser (91.4% test262 pass rate)
- Static class blocks, await/yield as contextual identifiers
- Module vs script parsing mode, import.source support
- Compiler: AST-to-bytecode compiler (compiler.ml, opcode.ml, bytecode.ml)
- All QuickJS opcodes defined (~250 opcodes)
- Label patching for control flow
- Constant pool management
- Runtime: Stack-based bytecode interpreter
- JavaScript value types (value.ml)
- Execution context with stack frames (context.ml)
- Interpreter with core operations (interpreter.ml)
- Working features: literals, arithmetic, strings, comparisons,
logical ops, typeof, variables, objects, conditionals, loops
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
+7216
-30
+240
lib/quickjs/compiler/bytecode.ml
+240
lib/quickjs/compiler/bytecode.ml
···
1
+
(** QuickJS Bytecode Format.
2
+
3
+
This module defines the bytecode format used by the QuickJS interpreter.
4
+
Bytecode is generated from the AST by the compiler and executed by
5
+
the interpreter. *)
6
+
7
+
(** Constant pool entry *)
8
+
type constant =
9
+
| Const_int of int32
10
+
| Const_float of float
11
+
| Const_string of string
12
+
| Const_bigint of string
13
+
| Const_function of function_bytecode
14
+
| Const_regexp of { pattern : string; flags : string }
15
+
16
+
(** Variable definition in a scope *)
17
+
and var_def = {
18
+
var_name : string;
19
+
var_kind : var_kind;
20
+
mutable is_captured : bool; (* Used by a closure *)
21
+
mutable is_lexical : bool; (* let/const vs var *)
22
+
}
23
+
24
+
and var_kind =
25
+
| Var_normal
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+
| Var_const
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+
| Var_let
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+
| Var_function
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+
| Var_argument
30
+
| Var_catch
31
+
32
+
(** Label for jumps *)
33
+
and label = {
34
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mutable label_pos : int; (* Position in bytecode *)
35
+
mutable ref_count : int; (* Number of references *)
36
+
}
37
+
38
+
(** Function bytecode *)
39
+
and function_bytecode = {
40
+
(* Function metadata *)
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+
mutable func_name : string option;
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+
mutable arg_count : int;
43
+
mutable var_count : int;
44
+
mutable stack_size : int;
45
+
mutable is_generator : bool;
46
+
mutable is_async : bool;
47
+
mutable is_arrow : bool;
48
+
mutable has_prototype : bool;
49
+
mutable has_simple_params : bool;
50
+
mutable is_derived_class_ctor : bool;
51
+
mutable needs_home_object : bool;
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+
53
+
(* Bytecode *)
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+
mutable bytecode : bytes;
55
+
mutable bytecode_len : int;
56
+
57
+
(* Constant pool *)
58
+
mutable constants : constant array;
59
+
60
+
(* Variable definitions *)
61
+
mutable vars : var_def array;
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+
mutable closure_vars : string array;
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+
64
+
(* Debug info *)
65
+
mutable source_file : string;
66
+
mutable line_num : int;
67
+
}
68
+
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(** Pending label patch *)
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type label_patch = {
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patch_pos : int; (* Position to patch in bytecode *)
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target_label : label; (* Label to resolve *)
73
+
}
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+
75
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(** Bytecode builder for generating bytecode *)
76
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type builder = {
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mutable code : Buffer.t;
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+
mutable constants : constant list;
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+
mutable labels : label list;
80
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mutable patches : label_patch list; (* Pending patches *)
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+
mutable vars : var_def list;
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+
mutable closure_vars : string list;
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+
mutable stack_size : int;
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+
mutable max_stack_size : int;
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+
mutable source_file : string;
86
+
}
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+
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(** Create a new bytecode builder *)
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let create_builder ?(source_file="") () = {
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code = Buffer.create 256;
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constants = [];
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labels = [];
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+
patches = [];
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+
vars = [];
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+
closure_vars = [];
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stack_size = 0;
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max_stack_size = 0;
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source_file;
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}
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+
101
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(** Emit a single byte *)
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let emit_u8 builder byte =
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Buffer.add_char builder.code (Char.chr (byte land 0xff))
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+
105
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(** Emit a 16-bit unsigned value (little-endian) *)
106
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let emit_u16 builder value =
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emit_u8 builder (value land 0xff);
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emit_u8 builder ((value lsr 8) land 0xff)
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+
110
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(** Emit a 32-bit signed value (little-endian) *)
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let emit_i32 builder value =
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let v = Int32.to_int value in
113
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emit_u8 builder (v land 0xff);
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emit_u8 builder ((v lsr 8) land 0xff);
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+
emit_u8 builder ((v lsr 16) land 0xff);
116
+
emit_u8 builder ((v lsr 24) land 0xff)
117
+
118
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(** Emit a 32-bit unsigned value (little-endian) *)
119
+
let emit_u32 builder value =
120
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emit_u8 builder (value land 0xff);
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emit_u8 builder ((value lsr 8) land 0xff);
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emit_u8 builder ((value lsr 16) land 0xff);
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emit_u8 builder ((value lsr 24) land 0xff)
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+
125
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(** Get current position in bytecode *)
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let current_pos builder =
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Buffer.length builder.code
128
+
129
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(** Emit an opcode *)
130
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let emit_op builder op =
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(* Convert opcode to byte value *)
132
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emit_u8 builder (Obj.magic op : int)
133
+
134
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(** Update stack size tracking *)
135
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let update_stack builder pop push =
136
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builder.stack_size <- builder.stack_size - pop + push;
137
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if builder.stack_size > builder.max_stack_size then
138
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builder.max_stack_size <- builder.stack_size
139
+
140
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(** Add a constant to the pool and return its index *)
141
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let add_constant builder const =
142
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let idx = List.length builder.constants in
143
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builder.constants <- builder.constants @ [const];
144
+
idx
145
+
146
+
(** Create a new label *)
147
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let new_label builder =
148
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let label = { label_pos = -1; ref_count = 0 } in
149
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builder.labels <- label :: builder.labels;
150
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label
151
+
152
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(** Set the position of a label to current position *)
153
+
let define_label builder label =
154
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label.label_pos <- current_pos builder
155
+
156
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(** Emit a jump to a label (the label position will be patched later) *)
157
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let emit_goto builder op label =
158
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emit_op builder op;
159
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let offset_pos = current_pos builder in
160
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emit_u32 builder 0; (* placeholder *)
161
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label.ref_count <- label.ref_count + 1;
162
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builder.patches <- { patch_pos = offset_pos; target_label = label } :: builder.patches;
163
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offset_pos
164
+
165
+
(** Add a variable definition *)
166
+
let add_var builder name kind =
167
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let idx = List.length builder.vars in
168
+
let var = {
169
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var_name = name;
170
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var_kind = kind;
171
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is_captured = false;
172
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is_lexical = (kind = Var_let || kind = Var_const);
173
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} in
174
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builder.vars <- builder.vars @ [var];
175
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idx
176
+
177
+
(** Find a variable by name *)
178
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let find_var builder name =
179
+
let rec find idx = function
180
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| [] -> None
181
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| v :: rest ->
182
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if v.var_name = name then Some idx
183
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else find (idx + 1) rest
184
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in
185
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find 0 builder.vars
186
+
187
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(** Add a closure variable *)
188
+
let add_closure_var builder name =
189
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let idx = List.length builder.closure_vars in
190
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builder.closure_vars <- builder.closure_vars @ [name];
191
+
idx
192
+
193
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(** Build the final function bytecode *)
194
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let build builder ~name ~arg_count ~is_generator ~is_async ~is_arrow =
195
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(* Convert to bytes first so we can patch *)
196
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let bytecode = Buffer.to_bytes builder.code in
197
+
198
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(* Apply label patches *)
199
+
List.iter (fun patch ->
200
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let target_pos = patch.target_label.label_pos in
201
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let patch_pos = patch.patch_pos in
202
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(* Calculate relative offset from after the jump instruction *)
203
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let offset = target_pos - (patch_pos + 4) in
204
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(* Write 32-bit offset (little-endian) *)
205
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Bytes.set bytecode patch_pos (Char.chr (offset land 0xff));
206
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Bytes.set bytecode (patch_pos + 1) (Char.chr ((offset lsr 8) land 0xff));
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Bytes.set bytecode (patch_pos + 2) (Char.chr ((offset lsr 16) land 0xff));
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Bytes.set bytecode (patch_pos + 3) (Char.chr ((offset lsr 24) land 0xff))
209
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) builder.patches;
210
+
211
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{
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func_name = name;
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arg_count;
214
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var_count = List.length builder.vars;
215
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stack_size = builder.max_stack_size;
216
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is_generator;
217
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is_async;
218
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is_arrow;
219
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has_prototype = not is_arrow;
220
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has_simple_params = true;
221
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is_derived_class_ctor = false;
222
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needs_home_object = false;
223
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bytecode;
224
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bytecode_len = Bytes.length bytecode;
225
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constants = Array.of_list builder.constants;
226
+
vars = Array.of_list builder.vars;
227
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closure_vars = Array.of_list builder.closure_vars;
228
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source_file = builder.source_file;
229
+
line_num = 1;
230
+
}
231
+
232
+
(** Dump bytecode for debugging *)
233
+
let dump_bytecode fb =
234
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Printf.printf "Function: %s\n" (Option.value fb.func_name ~default:"<anonymous>");
235
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Printf.printf " args: %d, vars: %d, stack: %d\n"
236
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fb.arg_count fb.var_count fb.stack_size;
237
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Printf.printf " generator: %b, async: %b, arrow: %b\n"
238
+
fb.is_generator fb.is_async fb.is_arrow;
239
+
Printf.printf " bytecode: %d bytes\n" fb.bytecode_len;
240
+
Printf.printf " constants: %d\n" (Array.length fb.constants)
+1177
lib/quickjs/compiler/compiler.ml
+1177
lib/quickjs/compiler/compiler.ml
···
1
+
(** QuickJS Bytecode Compiler.
2
+
3
+
Compiles the JavaScript AST to bytecode. *)
4
+
5
+
open Quickjs_parser
6
+
7
+
(** Compiler state *)
8
+
type t = {
9
+
mutable builder : Bytecode.builder;
10
+
mutable scope_depth : int;
11
+
mutable in_function : bool;
12
+
mutable in_generator : bool;
13
+
mutable in_async : bool;
14
+
mutable break_label : Bytecode.label option;
15
+
mutable continue_label : Bytecode.label option;
16
+
}
17
+
18
+
(** Create a new compiler *)
19
+
let create ?(source_file="") () = {
20
+
builder = Bytecode.create_builder ~source_file ();
21
+
scope_depth = 0;
22
+
in_function = false;
23
+
in_generator = false;
24
+
in_async = false;
25
+
break_label = None;
26
+
continue_label = None;
27
+
}
28
+
29
+
(** Emit an opcode *)
30
+
let emit_op comp op =
31
+
Bytecode.emit_op comp.builder op
32
+
33
+
(** Emit an opcode with a constant *)
34
+
let emit_const comp const =
35
+
let idx = Bytecode.add_constant comp.builder const in
36
+
emit_op comp Opcode.OP_push_const;
37
+
Bytecode.emit_u32 comp.builder idx
38
+
39
+
(** Emit push number *)
40
+
let emit_push_number comp n =
41
+
let i = int_of_float n in
42
+
if Float.equal n (float_of_int i) then begin
43
+
(* Integer value *)
44
+
match i with
45
+
| -1 -> emit_op comp Opcode.OP_push_minus1
46
+
| 0 -> emit_op comp Opcode.OP_push_0
47
+
| 1 -> emit_op comp Opcode.OP_push_1
48
+
| 2 -> emit_op comp Opcode.OP_push_2
49
+
| 3 -> emit_op comp Opcode.OP_push_3
50
+
| 4 -> emit_op comp Opcode.OP_push_4
51
+
| 5 -> emit_op comp Opcode.OP_push_5
52
+
| 6 -> emit_op comp Opcode.OP_push_6
53
+
| 7 -> emit_op comp Opcode.OP_push_7
54
+
| i when i >= -128 && i <= 127 ->
55
+
emit_op comp Opcode.OP_push_i8;
56
+
Bytecode.emit_u8 comp.builder i
57
+
| i when i >= -32768 && i <= 32767 ->
58
+
emit_op comp Opcode.OP_push_i16;
59
+
Bytecode.emit_u16 comp.builder i
60
+
| _ ->
61
+
emit_op comp Opcode.OP_push_i32;
62
+
Bytecode.emit_i32 comp.builder (Int32.of_int i)
63
+
end else begin
64
+
(* Floating point value *)
65
+
emit_const comp (Bytecode.Const_float n)
66
+
end;
67
+
Bytecode.update_stack comp.builder 0 1
68
+
69
+
(** Emit push string *)
70
+
let emit_push_string comp s =
71
+
if s = "" then begin
72
+
emit_op comp Opcode.OP_push_empty_string
73
+
end else begin
74
+
emit_const comp (Bytecode.Const_string s)
75
+
end;
76
+
Bytecode.update_stack comp.builder 0 1
77
+
78
+
(** Compile an expression *)
79
+
let rec compile_expr comp (expr : Ast.expression) =
80
+
match expr.expr with
81
+
| Ast.Literal lit ->
82
+
compile_literal comp lit
83
+
84
+
| Ast.Identifier id ->
85
+
compile_identifier comp id
86
+
87
+
| Ast.This ->
88
+
emit_op comp Opcode.OP_push_this;
89
+
Bytecode.update_stack comp.builder 0 1
90
+
91
+
| Ast.Array elements ->
92
+
compile_array comp elements
93
+
94
+
| Ast.Object props ->
95
+
compile_object comp props
96
+
97
+
| Ast.Unary { operator; argument } ->
98
+
compile_unary comp operator argument
99
+
100
+
| Ast.Binary { operator; left; right } ->
101
+
compile_binary comp operator left right
102
+
103
+
| Ast.Logical { operator; left; right } ->
104
+
compile_logical comp operator left right
105
+
106
+
| Ast.Conditional { test; consequent; alternate } ->
107
+
compile_conditional comp test consequent alternate
108
+
109
+
| Ast.Assignment { operator; left; right } ->
110
+
compile_assignment comp operator left right
111
+
112
+
| Ast.Call { callee; arguments; optional = _ } ->
113
+
compile_call comp callee arguments
114
+
115
+
| Ast.New { callee; arguments } ->
116
+
compile_new comp callee arguments
117
+
118
+
| Ast.Member { object_; property; computed; optional = _ } ->
119
+
compile_member comp object_ property computed
120
+
121
+
| Ast.Sequence exprs ->
122
+
compile_sequence comp exprs
123
+
124
+
| Ast.Function fn ->
125
+
compile_function_expr comp fn
126
+
127
+
| Ast.Arrow arrow ->
128
+
compile_arrow comp arrow
129
+
130
+
| Ast.Update { operator; argument; prefix } ->
131
+
compile_update comp operator argument prefix
132
+
133
+
| Ast.Yield { argument; delegate } ->
134
+
compile_yield comp argument delegate
135
+
136
+
| Ast.Await argument ->
137
+
compile_await comp argument
138
+
139
+
| Ast.Template template ->
140
+
compile_template comp template
141
+
142
+
| Ast.TaggedTemplate { tag; quasi } ->
143
+
compile_tagged_template comp tag quasi
144
+
145
+
| Ast.Class cls ->
146
+
compile_class_expr comp cls
147
+
148
+
| Ast.Spread arg ->
149
+
compile_expr comp arg;
150
+
(* Spread is typically handled by the containing context *)
151
+
()
152
+
153
+
| Ast.Paren expr ->
154
+
compile_expr comp expr
155
+
156
+
| Ast.Super ->
157
+
emit_op comp Opcode.OP_get_super;
158
+
Bytecode.update_stack comp.builder 0 1
159
+
160
+
| Ast.Private_identifier name ->
161
+
emit_push_string comp name;
162
+
emit_op comp Opcode.OP_private_symbol
163
+
164
+
| Ast.Import arg ->
165
+
compile_expr comp arg;
166
+
emit_op comp Opcode.OP_import;
167
+
Bytecode.update_stack comp.builder 2 1
168
+
169
+
| Ast.Meta_property { meta; property } ->
170
+
(* import.meta or new.target *)
171
+
if meta.name = "new" && property.name = "target" then begin
172
+
emit_op comp Opcode.OP_special_object;
173
+
Bytecode.emit_u8 comp.builder 0 (* NEW_TARGET *)
174
+
end else if meta.name = "import" && property.name = "meta" then begin
175
+
emit_op comp Opcode.OP_special_object;
176
+
Bytecode.emit_u8 comp.builder 2 (* IMPORT_META *)
177
+
end;
178
+
Bytecode.update_stack comp.builder 0 1
179
+
180
+
(** Compile a literal value *)
181
+
and compile_literal comp = function
182
+
| Ast.Lit_null ->
183
+
emit_op comp Opcode.OP_null;
184
+
Bytecode.update_stack comp.builder 0 1
185
+
| Ast.Lit_bool b ->
186
+
emit_op comp (if b then Opcode.OP_push_true else Opcode.OP_push_false);
187
+
Bytecode.update_stack comp.builder 0 1
188
+
| Ast.Lit_number n ->
189
+
emit_push_number comp n
190
+
| Ast.Lit_bigint s ->
191
+
emit_const comp (Bytecode.Const_bigint s);
192
+
Bytecode.update_stack comp.builder 0 1
193
+
| Ast.Lit_string s ->
194
+
emit_push_string comp s
195
+
| Ast.Lit_regexp { pattern; flags } ->
196
+
emit_const comp (Bytecode.Const_regexp { pattern; flags });
197
+
emit_op comp Opcode.OP_regexp;
198
+
Bytecode.update_stack comp.builder 0 1
199
+
200
+
(** Compile an identifier reference *)
201
+
and compile_identifier comp id =
202
+
(* Handle special globals *)
203
+
match id.name with
204
+
| "undefined" ->
205
+
emit_op comp Opcode.OP_undefined;
206
+
Bytecode.update_stack comp.builder 0 1
207
+
| "null" ->
208
+
emit_op comp Opcode.OP_null;
209
+
Bytecode.update_stack comp.builder 0 1
210
+
| "true" ->
211
+
emit_op comp Opcode.OP_push_true;
212
+
Bytecode.update_stack comp.builder 0 1
213
+
| "false" ->
214
+
emit_op comp Opcode.OP_push_false;
215
+
Bytecode.update_stack comp.builder 0 1
216
+
| _ ->
217
+
match Bytecode.find_var comp.builder id.name with
218
+
| Some idx ->
219
+
(* Local variable *)
220
+
emit_op comp Opcode.OP_get_loc;
221
+
Bytecode.emit_u16 comp.builder idx;
222
+
Bytecode.update_stack comp.builder 0 1
223
+
| None ->
224
+
(* Global or closure variable - add name to constant pool *)
225
+
let const_idx = Bytecode.add_constant comp.builder (Bytecode.Const_string id.name) in
226
+
emit_op comp Opcode.OP_get_var;
227
+
Bytecode.emit_u16 comp.builder const_idx;
228
+
Bytecode.update_stack comp.builder 0 1
229
+
230
+
(** Compile an array literal *)
231
+
and compile_array comp elements =
232
+
emit_op comp Opcode.OP_object; (* Create array *)
233
+
Bytecode.update_stack comp.builder 0 1;
234
+
let idx = ref 0 in
235
+
List.iter (fun elem_opt ->
236
+
match elem_opt with
237
+
| None ->
238
+
(* Hole in array *)
239
+
incr idx
240
+
| Some elem ->
241
+
emit_push_number comp (float_of_int !idx);
242
+
compile_expr comp elem;
243
+
emit_op comp Opcode.OP_define_array_el;
244
+
Bytecode.update_stack comp.builder 2 0;
245
+
incr idx
246
+
) elements
247
+
248
+
(** Compile an object literal *)
249
+
and compile_object comp props =
250
+
emit_op comp Opcode.OP_object;
251
+
Bytecode.update_stack comp.builder 0 1;
252
+
List.iter (fun prop ->
253
+
match prop with
254
+
| Ast.Property { key; value; kind; shorthand = _; computed; method_ = _ } ->
255
+
emit_op comp Opcode.OP_dup; (* Duplicate object reference *)
256
+
Bytecode.update_stack comp.builder 0 1;
257
+
if computed then begin
258
+
compile_expr comp key;
259
+
emit_op comp Opcode.OP_to_propkey
260
+
end else begin
261
+
(* Get property name from key expression *)
262
+
match key.expr with
263
+
| Ast.Literal (Ast.Lit_string s) ->
264
+
emit_push_string comp s
265
+
| Ast.Identifier id ->
266
+
emit_push_string comp id.name
267
+
| _ ->
268
+
compile_expr comp key
269
+
end;
270
+
compile_expr comp value;
271
+
(match kind with
272
+
| Ast.Init ->
273
+
emit_op comp Opcode.OP_define_array_el
274
+
| Ast.Get ->
275
+
emit_op comp Opcode.OP_define_method;
276
+
Bytecode.emit_u8 comp.builder 1 (* getter *)
277
+
| Ast.Set ->
278
+
emit_op comp Opcode.OP_define_method;
279
+
Bytecode.emit_u8 comp.builder 2 (* setter *));
280
+
Bytecode.update_stack comp.builder 2 0
281
+
| Ast.Spread_element expr ->
282
+
emit_op comp Opcode.OP_dup;
283
+
compile_expr comp expr;
284
+
emit_op comp Opcode.OP_copy_data_properties;
285
+
Bytecode.emit_u8 comp.builder 0;
286
+
Bytecode.update_stack comp.builder 1 0
287
+
) props
288
+
289
+
(** Compile a unary expression *)
290
+
and compile_unary comp op arg =
291
+
match op with
292
+
| Ast.Typeof ->
293
+
compile_expr comp arg;
294
+
emit_op comp Opcode.OP_typeof;
295
+
Bytecode.update_stack comp.builder 1 1
296
+
| Ast.Delete ->
297
+
(match arg.expr with
298
+
| Ast.Member { object_; property; computed; _ } ->
299
+
compile_expr comp object_;
300
+
if computed then
301
+
compile_expr comp property
302
+
else begin
303
+
match property.expr with
304
+
| Ast.Literal (Ast.Lit_string s) -> emit_push_string comp s
305
+
| _ -> compile_expr comp property
306
+
end;
307
+
emit_op comp Opcode.OP_delete
308
+
| Ast.Identifier id ->
309
+
emit_push_string comp id.name;
310
+
emit_op comp Opcode.OP_delete_var
311
+
| _ ->
312
+
compile_expr comp arg;
313
+
emit_op comp Opcode.OP_drop;
314
+
emit_op comp Opcode.OP_push_true);
315
+
Bytecode.update_stack comp.builder 2 1
316
+
| Ast.Void ->
317
+
compile_expr comp arg;
318
+
emit_op comp Opcode.OP_drop;
319
+
emit_op comp Opcode.OP_undefined;
320
+
Bytecode.update_stack comp.builder 1 1
321
+
| Ast.Not ->
322
+
compile_expr comp arg;
323
+
emit_op comp Opcode.OP_lnot;
324
+
Bytecode.update_stack comp.builder 1 1
325
+
| Ast.Bitnot ->
326
+
compile_expr comp arg;
327
+
emit_op comp Opcode.OP_not;
328
+
Bytecode.update_stack comp.builder 1 1
329
+
| Ast.Neg ->
330
+
compile_expr comp arg;
331
+
emit_op comp Opcode.OP_neg;
332
+
Bytecode.update_stack comp.builder 1 1
333
+
| Ast.Pos ->
334
+
compile_expr comp arg;
335
+
emit_op comp Opcode.OP_plus;
336
+
Bytecode.update_stack comp.builder 1 1
337
+
338
+
(** Compile a binary expression *)
339
+
and compile_binary comp op left right =
340
+
compile_expr comp left;
341
+
compile_expr comp right;
342
+
let opcode = match op with
343
+
| Ast.Plus -> Opcode.OP_add
344
+
| Ast.Minus -> Opcode.OP_sub
345
+
| Ast.Times -> Opcode.OP_mul
346
+
| Ast.Div -> Opcode.OP_div
347
+
| Ast.Mod -> Opcode.OP_mod
348
+
| Ast.Exp -> Opcode.OP_pow
349
+
| Ast.Lt -> Opcode.OP_lt
350
+
| Ast.Lte -> Opcode.OP_lte
351
+
| Ast.Gt -> Opcode.OP_gt
352
+
| Ast.Gte -> Opcode.OP_gte
353
+
| Ast.Eq -> Opcode.OP_eq
354
+
| Ast.Neq -> Opcode.OP_neq
355
+
| Ast.Strict_eq -> Opcode.OP_strict_eq
356
+
| Ast.Strict_neq -> Opcode.OP_strict_neq
357
+
| Ast.Bitor -> Opcode.OP_or
358
+
| Ast.Bitxor -> Opcode.OP_xor
359
+
| Ast.Bitand -> Opcode.OP_and
360
+
| Ast.Lshift -> Opcode.OP_shl
361
+
| Ast.Rshift -> Opcode.OP_sar
362
+
| Ast.Urshift -> Opcode.OP_shr
363
+
| Ast.In -> Opcode.OP_in
364
+
| Ast.Instanceof -> Opcode.OP_instanceof
365
+
in
366
+
emit_op comp opcode;
367
+
Bytecode.update_stack comp.builder 2 1
368
+
369
+
(** Compile a logical expression *)
370
+
and compile_logical comp op left right =
371
+
let end_label = Bytecode.new_label comp.builder in
372
+
compile_expr comp left;
373
+
emit_op comp Opcode.OP_dup;
374
+
Bytecode.update_stack comp.builder 0 1;
375
+
(match op with
376
+
| Ast.Or ->
377
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_if_true end_label)
378
+
| Ast.And ->
379
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_if_false end_label)
380
+
| Ast.Nullish ->
381
+
emit_op comp Opcode.OP_is_undefined_or_null;
382
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_if_false end_label));
383
+
emit_op comp Opcode.OP_drop;
384
+
Bytecode.update_stack comp.builder 1 0;
385
+
compile_expr comp right;
386
+
Bytecode.define_label comp.builder end_label
387
+
388
+
(** Compile a conditional expression *)
389
+
and compile_conditional comp test consequent alternate =
390
+
let else_label = Bytecode.new_label comp.builder in
391
+
let end_label = Bytecode.new_label comp.builder in
392
+
compile_expr comp test;
393
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_if_false else_label);
394
+
Bytecode.update_stack comp.builder 1 0;
395
+
compile_expr comp consequent;
396
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_goto end_label);
397
+
Bytecode.define_label comp.builder else_label;
398
+
compile_expr comp alternate;
399
+
Bytecode.define_label comp.builder end_label
400
+
401
+
(** Compile an assignment expression *)
402
+
and compile_assignment comp op left right =
403
+
match left.pat with
404
+
| Ast.Pat_identifier id ->
405
+
(match Bytecode.find_var comp.builder id.name with
406
+
| Some idx ->
407
+
if op = Ast.Assign then begin
408
+
compile_expr comp right;
409
+
emit_op comp Opcode.OP_set_loc;
410
+
Bytecode.emit_u16 comp.builder idx
411
+
end else begin
412
+
emit_op comp Opcode.OP_get_loc;
413
+
Bytecode.emit_u16 comp.builder idx;
414
+
compile_expr comp right;
415
+
compile_compound_op comp op;
416
+
emit_op comp Opcode.OP_set_loc;
417
+
Bytecode.emit_u16 comp.builder idx
418
+
end
419
+
| None ->
420
+
(* Global variable - add name to constant pool *)
421
+
let const_idx = Bytecode.add_constant comp.builder (Bytecode.Const_string id.name) in
422
+
if op = Ast.Assign then begin
423
+
compile_expr comp right;
424
+
emit_op comp Opcode.OP_put_var;
425
+
Bytecode.emit_u16 comp.builder const_idx
426
+
end else begin
427
+
emit_op comp Opcode.OP_get_var;
428
+
Bytecode.emit_u16 comp.builder const_idx;
429
+
compile_expr comp right;
430
+
compile_compound_op comp op;
431
+
emit_op comp Opcode.OP_put_var;
432
+
Bytecode.emit_u16 comp.builder const_idx
433
+
end);
434
+
Bytecode.update_stack comp.builder 0 1
435
+
436
+
| Ast.Pat_expression expr ->
437
+
(match expr.expr with
438
+
| Ast.Member { object_; property; computed; _ } ->
439
+
compile_expr comp object_;
440
+
if computed then
441
+
compile_expr comp property
442
+
else begin
443
+
match property.expr with
444
+
| Ast.Literal (Ast.Lit_string s) -> emit_push_string comp s
445
+
| _ -> compile_expr comp property
446
+
end;
447
+
if op = Ast.Assign then begin
448
+
compile_expr comp right;
449
+
emit_op comp Opcode.OP_put_array_el
450
+
end else begin
451
+
emit_op comp Opcode.OP_dup2;
452
+
emit_op comp Opcode.OP_get_array_el;
453
+
compile_expr comp right;
454
+
compile_compound_op comp op;
455
+
emit_op comp Opcode.OP_put_array_el
456
+
end;
457
+
Bytecode.update_stack comp.builder 2 1
458
+
| _ ->
459
+
failwith "Invalid assignment target")
460
+
461
+
| _ ->
462
+
(* Destructuring assignment - simplified *)
463
+
compile_expr comp right;
464
+
Bytecode.update_stack comp.builder 0 1
465
+
466
+
(** Compile compound assignment operator *)
467
+
and compile_compound_op comp = function
468
+
| Ast.Assign -> ()
469
+
| Ast.Plus_assign -> emit_op comp Opcode.OP_add
470
+
| Ast.Minus_assign -> emit_op comp Opcode.OP_sub
471
+
| Ast.Times_assign -> emit_op comp Opcode.OP_mul
472
+
| Ast.Div_assign -> emit_op comp Opcode.OP_div
473
+
| Ast.Mod_assign -> emit_op comp Opcode.OP_mod
474
+
| Ast.Exp_assign -> emit_op comp Opcode.OP_pow
475
+
| Ast.Lshift_assign -> emit_op comp Opcode.OP_shl
476
+
| Ast.Rshift_assign -> emit_op comp Opcode.OP_sar
477
+
| Ast.Urshift_assign -> emit_op comp Opcode.OP_shr
478
+
| Ast.Bitor_assign -> emit_op comp Opcode.OP_or
479
+
| Ast.Bitxor_assign -> emit_op comp Opcode.OP_xor
480
+
| Ast.Bitand_assign -> emit_op comp Opcode.OP_and
481
+
| Ast.Or_assign | Ast.And_assign | Ast.Nullish_assign ->
482
+
failwith "Short-circuit assignment not yet implemented"
483
+
484
+
(** Compile a function call *)
485
+
and compile_call comp callee arguments =
486
+
let argc = List.length arguments in
487
+
match callee.expr with
488
+
| Ast.Member { object_; property; computed; _ } ->
489
+
compile_expr comp object_;
490
+
emit_op comp Opcode.OP_dup;
491
+
Bytecode.update_stack comp.builder 0 1;
492
+
if computed then begin
493
+
compile_expr comp property;
494
+
emit_op comp Opcode.OP_get_array_el
495
+
end else begin
496
+
match property.expr with
497
+
| Ast.Literal (Ast.Lit_string s) ->
498
+
emit_push_string comp s;
499
+
emit_op comp Opcode.OP_get_field
500
+
| _ ->
501
+
compile_expr comp property;
502
+
emit_op comp Opcode.OP_get_array_el
503
+
end;
504
+
List.iter (compile_expr comp) arguments;
505
+
emit_op comp Opcode.OP_call_method;
506
+
Bytecode.emit_u16 comp.builder argc;
507
+
Bytecode.update_stack comp.builder (argc + 2) 1
508
+
| _ ->
509
+
compile_expr comp callee;
510
+
List.iter (compile_expr comp) arguments;
511
+
(match argc with
512
+
| 0 -> emit_op comp Opcode.OP_call0
513
+
| 1 -> emit_op comp Opcode.OP_call1
514
+
| 2 -> emit_op comp Opcode.OP_call2
515
+
| 3 -> emit_op comp Opcode.OP_call3
516
+
| _ ->
517
+
emit_op comp Opcode.OP_call;
518
+
Bytecode.emit_u16 comp.builder argc);
519
+
Bytecode.update_stack comp.builder (argc + 1) 1
520
+
521
+
(** Compile a new expression *)
522
+
and compile_new comp callee arguments =
523
+
let argc = List.length arguments in
524
+
compile_expr comp callee;
525
+
emit_op comp Opcode.OP_dup; (* For new.target *)
526
+
Bytecode.update_stack comp.builder 0 1;
527
+
List.iter (compile_expr comp) arguments;
528
+
emit_op comp Opcode.OP_call_constructor;
529
+
Bytecode.emit_u16 comp.builder argc;
530
+
Bytecode.update_stack comp.builder (argc + 2) 1
531
+
532
+
(** Compile a member expression *)
533
+
and compile_member comp obj prop computed =
534
+
compile_expr comp obj;
535
+
if computed then begin
536
+
compile_expr comp prop;
537
+
emit_op comp Opcode.OP_get_array_el
538
+
end else begin
539
+
match prop.expr with
540
+
| Ast.Literal (Ast.Lit_string s) ->
541
+
let const_idx = Bytecode.add_constant comp.builder (Bytecode.Const_string s) in
542
+
emit_op comp Opcode.OP_get_field;
543
+
Bytecode.emit_u32 comp.builder const_idx
544
+
| Ast.Identifier id ->
545
+
let const_idx = Bytecode.add_constant comp.builder (Bytecode.Const_string id.name) in
546
+
emit_op comp Opcode.OP_get_field;
547
+
Bytecode.emit_u32 comp.builder const_idx
548
+
| _ ->
549
+
compile_expr comp prop;
550
+
emit_op comp Opcode.OP_get_array_el
551
+
end;
552
+
Bytecode.update_stack comp.builder 1 1
553
+
554
+
(** Compile a sequence expression *)
555
+
and compile_sequence comp exprs =
556
+
match exprs with
557
+
| [] -> ()
558
+
| [e] -> compile_expr comp e
559
+
| e :: rest ->
560
+
compile_expr comp e;
561
+
emit_op comp Opcode.OP_drop;
562
+
Bytecode.update_stack comp.builder 1 0;
563
+
compile_sequence comp rest
564
+
565
+
(** Compile a function expression *)
566
+
and compile_function_expr comp fn =
567
+
let func_comp = create ~source_file:comp.builder.source_file () in
568
+
func_comp.in_function <- true;
569
+
func_comp.in_generator <- fn.fn_generator;
570
+
func_comp.in_async <- fn.fn_async;
571
+
(* Add parameters as variables *)
572
+
List.iter (fun param ->
573
+
match param.Ast.pat with
574
+
| Ast.Pat_identifier id ->
575
+
ignore (Bytecode.add_var func_comp.builder id.name Bytecode.Var_argument)
576
+
| _ -> ()
577
+
) fn.fn_params;
578
+
(* Compile function body *)
579
+
compile_function_body func_comp fn.fn_body;
580
+
let func_bc = Bytecode.build func_comp.builder
581
+
~name:(Option.map (fun id -> id.Ast.name) fn.fn_id)
582
+
~arg_count:(List.length fn.fn_params)
583
+
~is_generator:fn.fn_generator
584
+
~is_async:fn.fn_async
585
+
~is_arrow:false
586
+
in
587
+
let idx = Bytecode.add_constant comp.builder (Bytecode.Const_function func_bc) in
588
+
emit_op comp Opcode.OP_fclosure;
589
+
Bytecode.emit_u32 comp.builder idx;
590
+
Bytecode.update_stack comp.builder 0 1
591
+
592
+
(** Compile an arrow function *)
593
+
and compile_arrow comp arrow =
594
+
let func_comp = create ~source_file:comp.builder.source_file () in
595
+
func_comp.in_function <- true;
596
+
func_comp.in_async <- arrow.ar_async;
597
+
(* Add parameters as variables *)
598
+
List.iter (fun param ->
599
+
match param.Ast.pat with
600
+
| Ast.Pat_identifier id ->
601
+
ignore (Bytecode.add_var func_comp.builder id.name Bytecode.Var_argument)
602
+
| _ -> ()
603
+
) arrow.ar_params;
604
+
(* Compile arrow body *)
605
+
(match arrow.ar_body with
606
+
| Ast.Arrow_expression expr ->
607
+
compile_expr func_comp expr;
608
+
emit_op func_comp Opcode.OP_return
609
+
| Ast.Arrow_block body ->
610
+
compile_function_body func_comp body);
611
+
let func_bc = Bytecode.build func_comp.builder
612
+
~name:None
613
+
~arg_count:(List.length arrow.ar_params)
614
+
~is_generator:false
615
+
~is_async:arrow.ar_async
616
+
~is_arrow:true
617
+
in
618
+
let idx = Bytecode.add_constant comp.builder (Bytecode.Const_function func_bc) in
619
+
emit_op comp Opcode.OP_fclosure;
620
+
Bytecode.emit_u32 comp.builder idx;
621
+
Bytecode.update_stack comp.builder 0 1
622
+
623
+
(** Compile an update expression (++/--) *)
624
+
and compile_update comp op arg prefix =
625
+
let is_incr = (op = Ast.Incr) in
626
+
match arg.expr with
627
+
| Ast.Identifier id ->
628
+
(match Bytecode.find_var comp.builder id.name with
629
+
| Some idx ->
630
+
if prefix then begin
631
+
emit_op comp (if is_incr then Opcode.OP_inc_loc else Opcode.OP_dec_loc);
632
+
Bytecode.emit_u8 comp.builder idx;
633
+
emit_op comp Opcode.OP_get_loc;
634
+
Bytecode.emit_u16 comp.builder idx
635
+
end else begin
636
+
emit_op comp Opcode.OP_get_loc;
637
+
Bytecode.emit_u16 comp.builder idx;
638
+
emit_op comp (if is_incr then Opcode.OP_post_inc else Opcode.OP_post_dec);
639
+
emit_op comp Opcode.OP_put_loc;
640
+
Bytecode.emit_u16 comp.builder idx
641
+
end
642
+
| None ->
643
+
(* Global variable - add name to constant pool *)
644
+
let const_idx = Bytecode.add_constant comp.builder (Bytecode.Const_string id.name) in
645
+
if prefix then begin
646
+
(* ++x: get, inc, dup (for result), put *)
647
+
emit_op comp Opcode.OP_get_var;
648
+
Bytecode.emit_u16 comp.builder const_idx;
649
+
emit_op comp (if is_incr then Opcode.OP_inc else Opcode.OP_dec);
650
+
emit_op comp Opcode.OP_dup;
651
+
emit_op comp Opcode.OP_put_var;
652
+
Bytecode.emit_u16 comp.builder const_idx
653
+
end else begin
654
+
(* x++: get, dup (for result), inc, put *)
655
+
emit_op comp Opcode.OP_get_var;
656
+
Bytecode.emit_u16 comp.builder const_idx;
657
+
emit_op comp Opcode.OP_dup;
658
+
emit_op comp (if is_incr then Opcode.OP_inc else Opcode.OP_dec);
659
+
emit_op comp Opcode.OP_put_var;
660
+
Bytecode.emit_u16 comp.builder const_idx
661
+
end);
662
+
Bytecode.update_stack comp.builder 0 1
663
+
| _ ->
664
+
failwith "Update expression target not implemented"
665
+
666
+
(** Compile a yield expression *)
667
+
and compile_yield comp arg delegate =
668
+
(match arg with
669
+
| Some expr -> compile_expr comp expr
670
+
| None -> emit_op comp Opcode.OP_undefined);
671
+
emit_op comp (if delegate then Opcode.OP_yield_star else Opcode.OP_yield);
672
+
Bytecode.update_stack comp.builder 1 1
673
+
674
+
(** Compile an await expression *)
675
+
and compile_await comp arg =
676
+
compile_expr comp arg;
677
+
emit_op comp Opcode.OP_await;
678
+
Bytecode.update_stack comp.builder 1 1
679
+
680
+
(** Compile a template literal *)
681
+
and compile_template comp template =
682
+
let rec compile_parts quasis exprs first =
683
+
match quasis, exprs with
684
+
| [], [] -> ()
685
+
| quasi :: rest_quasis, [] ->
686
+
emit_push_string comp quasi.Ast.raw;
687
+
if not first then emit_op comp Opcode.OP_add;
688
+
compile_parts rest_quasis [] false
689
+
| quasi :: rest_quasis, expr :: rest_exprs ->
690
+
emit_push_string comp quasi.Ast.raw;
691
+
if not first then emit_op comp Opcode.OP_add;
692
+
compile_expr comp expr;
693
+
emit_op comp Opcode.OP_add;
694
+
compile_parts rest_quasis rest_exprs false
695
+
| [], _ -> ()
696
+
in
697
+
compile_parts template.quasis template.expressions true;
698
+
Bytecode.update_stack comp.builder 0 1
699
+
700
+
(** Compile a tagged template literal *)
701
+
and compile_tagged_template comp tag quasi =
702
+
compile_expr comp tag;
703
+
(* Build template array *)
704
+
emit_op comp Opcode.OP_object;
705
+
List.iteri (fun i q ->
706
+
emit_push_number comp (float_of_int i);
707
+
emit_push_string comp q.Ast.raw;
708
+
emit_op comp Opcode.OP_define_array_el
709
+
) quasi.quasis;
710
+
(* Add template expressions as arguments *)
711
+
List.iter (compile_expr comp) quasi.expressions;
712
+
let argc = 1 + List.length quasi.expressions in
713
+
emit_op comp Opcode.OP_call;
714
+
Bytecode.emit_u16 comp.builder argc;
715
+
Bytecode.update_stack comp.builder (argc + 1) 1
716
+
717
+
(** Compile a class expression *)
718
+
and compile_class_expr comp cls =
719
+
(* Compile superclass if present *)
720
+
(match cls.cls_super with
721
+
| Some super -> compile_expr comp super
722
+
| None -> emit_op comp Opcode.OP_undefined);
723
+
Bytecode.update_stack comp.builder 0 1;
724
+
725
+
(* Define class *)
726
+
let class_name = match cls.cls_id with
727
+
| Some id -> id.Ast.name
728
+
| None -> ""
729
+
in
730
+
emit_push_string comp class_name;
731
+
emit_op comp Opcode.OP_define_class;
732
+
Bytecode.emit_u32 comp.builder 0; (* class_flags *)
733
+
Bytecode.emit_u8 comp.builder 0; (* additional flags *)
734
+
Bytecode.update_stack comp.builder 1 2; (* parent -> constructor, prototype *)
735
+
736
+
(* Compile class body *)
737
+
List.iter (fun elem ->
738
+
match elem with
739
+
| Ast.Method_definition { key; value; kind; static; computed = _ } ->
740
+
emit_op comp Opcode.OP_dup;
741
+
if static then emit_op comp Opcode.OP_swap;
742
+
(match key.expr with
743
+
| Ast.Literal (Ast.Lit_string s) -> emit_push_string comp s
744
+
| _ -> compile_expr comp key);
745
+
compile_function_expr comp value;
746
+
let method_flags = match kind with
747
+
| Ast.Method | Ast.Constructor -> 0
748
+
| Ast.Get_method -> 1
749
+
| Ast.Set_method -> 2
750
+
in
751
+
emit_op comp Opcode.OP_define_method;
752
+
Bytecode.emit_u8 comp.builder method_flags;
753
+
Bytecode.update_stack comp.builder 2 0
754
+
| Ast.Property_definition { key; value; static = _; computed = _ } ->
755
+
(match key.expr with
756
+
| Ast.Literal (Ast.Lit_string s) -> emit_push_string comp s
757
+
| _ -> compile_expr comp key);
758
+
(match value with
759
+
| Some v -> compile_expr comp v
760
+
| None -> emit_op comp Opcode.OP_undefined);
761
+
emit_op comp Opcode.OP_define_field;
762
+
Bytecode.update_stack comp.builder 2 0
763
+
| Ast.Static_block stmts ->
764
+
List.iter (compile_stmt comp) stmts
765
+
) cls.cls_body.cls_elements;
766
+
767
+
emit_op comp Opcode.OP_drop; (* Drop prototype, keep constructor *)
768
+
Bytecode.update_stack comp.builder 1 0
769
+
770
+
(** Compile a function body *)
771
+
and compile_function_body comp body =
772
+
List.iter (compile_stmt comp) body.body_statements;
773
+
(* Add implicit return undefined *)
774
+
emit_op comp Opcode.OP_return_undef
775
+
776
+
(** Compile a statement *)
777
+
and compile_stmt comp (stmt : Ast.statement) =
778
+
match stmt.stmt with
779
+
| Ast.Empty -> ()
780
+
781
+
| Ast.Block stmts ->
782
+
comp.scope_depth <- comp.scope_depth + 1;
783
+
List.iter (compile_stmt comp) stmts;
784
+
comp.scope_depth <- comp.scope_depth - 1
785
+
786
+
| Ast.Expression expr ->
787
+
compile_expr comp expr;
788
+
emit_op comp Opcode.OP_drop;
789
+
Bytecode.update_stack comp.builder 1 0
790
+
791
+
| Ast.Variable decl ->
792
+
compile_var_decl comp decl
793
+
794
+
| Ast.If { test; consequent; alternate } ->
795
+
compile_if comp test consequent alternate
796
+
797
+
| Ast.While { test; body } ->
798
+
compile_while comp test body
799
+
800
+
| Ast.Do_while { body; test } ->
801
+
compile_do_while comp body test
802
+
803
+
| Ast.For { init; test; update; body } ->
804
+
compile_for comp init test update body
805
+
806
+
| Ast.For_in { left; right; body } ->
807
+
compile_for_in comp left right body
808
+
809
+
| Ast.For_of { left; right; body; await } ->
810
+
compile_for_of comp left right body await
811
+
812
+
| Ast.Return expr_opt ->
813
+
(match expr_opt with
814
+
| Some expr ->
815
+
compile_expr comp expr;
816
+
emit_op comp Opcode.OP_return
817
+
| None ->
818
+
emit_op comp Opcode.OP_return_undef)
819
+
820
+
| Ast.Throw expr ->
821
+
compile_expr comp expr;
822
+
emit_op comp Opcode.OP_throw
823
+
824
+
| Ast.Try { block; handler; finalizer } ->
825
+
compile_try comp block handler finalizer
826
+
827
+
| Ast.Break label_opt ->
828
+
(match comp.break_label with
829
+
| Some label ->
830
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_goto label)
831
+
| None ->
832
+
failwith "Break outside loop");
833
+
ignore label_opt
834
+
835
+
| Ast.Continue label_opt ->
836
+
(match comp.continue_label with
837
+
| Some label ->
838
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_goto label)
839
+
| None ->
840
+
failwith "Continue outside loop");
841
+
ignore label_opt
842
+
843
+
| Ast.Switch { discriminant; cases } ->
844
+
compile_switch comp discriminant cases
845
+
846
+
| Ast.Function fd ->
847
+
compile_function_decl comp fd
848
+
849
+
| Ast.Class cd ->
850
+
compile_class_decl comp cd
851
+
852
+
| Ast.Labeled { label = _; body } ->
853
+
compile_stmt comp body
854
+
855
+
| Ast.With { object_ = _; body = _ } ->
856
+
failwith "With statement not supported"
857
+
858
+
| Ast.Debugger ->
859
+
() (* No-op in bytecode *)
860
+
861
+
(** Compile a variable declaration *)
862
+
and compile_var_decl comp (decl : Ast.var_declaration) =
863
+
List.iter (fun (declarator : Ast.var_declarator) ->
864
+
let var_kind = match decl.var_kind with
865
+
| Ast.Var -> Bytecode.Var_normal
866
+
| Ast.Let -> Bytecode.Var_let
867
+
| Ast.Const -> Bytecode.Var_const
868
+
| Ast.Using | Ast.Await_using -> Bytecode.Var_let
869
+
in
870
+
match declarator.var_id.pat with
871
+
| Ast.Pat_identifier id ->
872
+
let idx = Bytecode.add_var comp.builder id.name var_kind in
873
+
(match declarator.var_init with
874
+
| Some init ->
875
+
compile_expr comp init;
876
+
emit_op comp Opcode.OP_put_loc;
877
+
Bytecode.emit_u16 comp.builder idx;
878
+
Bytecode.update_stack comp.builder 1 0
879
+
| None -> ())
880
+
| _ ->
881
+
(* Destructuring - simplified *)
882
+
(match declarator.var_init with
883
+
| Some init -> compile_expr comp init; emit_op comp Opcode.OP_drop
884
+
| None -> ())
885
+
) decl.var_declarations
886
+
887
+
(** Compile an if statement *)
888
+
and compile_if comp test consequent alternate =
889
+
let else_label = Bytecode.new_label comp.builder in
890
+
let end_label = Bytecode.new_label comp.builder in
891
+
compile_expr comp test;
892
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_if_false else_label);
893
+
Bytecode.update_stack comp.builder 1 0;
894
+
compile_stmt comp consequent;
895
+
(match alternate with
896
+
| Some alt ->
897
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_goto end_label);
898
+
Bytecode.define_label comp.builder else_label;
899
+
compile_stmt comp alt;
900
+
Bytecode.define_label comp.builder end_label
901
+
| None ->
902
+
Bytecode.define_label comp.builder else_label)
903
+
904
+
(** Compile a while loop *)
905
+
and compile_while comp test body =
906
+
let start_label = Bytecode.new_label comp.builder in
907
+
let end_label = Bytecode.new_label comp.builder in
908
+
let old_break = comp.break_label in
909
+
let old_continue = comp.continue_label in
910
+
comp.break_label <- Some end_label;
911
+
comp.continue_label <- Some start_label;
912
+
Bytecode.define_label comp.builder start_label;
913
+
compile_expr comp test;
914
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_if_false end_label);
915
+
Bytecode.update_stack comp.builder 1 0;
916
+
compile_stmt comp body;
917
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_goto start_label);
918
+
Bytecode.define_label comp.builder end_label;
919
+
comp.break_label <- old_break;
920
+
comp.continue_label <- old_continue
921
+
922
+
(** Compile a do-while loop *)
923
+
and compile_do_while comp body test =
924
+
let start_label = Bytecode.new_label comp.builder in
925
+
let end_label = Bytecode.new_label comp.builder in
926
+
let old_break = comp.break_label in
927
+
let old_continue = comp.continue_label in
928
+
comp.break_label <- Some end_label;
929
+
comp.continue_label <- Some start_label;
930
+
Bytecode.define_label comp.builder start_label;
931
+
compile_stmt comp body;
932
+
compile_expr comp test;
933
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_if_true start_label);
934
+
Bytecode.update_stack comp.builder 1 0;
935
+
Bytecode.define_label comp.builder end_label;
936
+
comp.break_label <- old_break;
937
+
comp.continue_label <- old_continue
938
+
939
+
(** Compile a for loop *)
940
+
and compile_for comp init test update body =
941
+
let start_label = Bytecode.new_label comp.builder in
942
+
let cont_label = Bytecode.new_label comp.builder in
943
+
let end_label = Bytecode.new_label comp.builder in
944
+
let old_break = comp.break_label in
945
+
let old_continue = comp.continue_label in
946
+
comp.break_label <- Some end_label;
947
+
comp.continue_label <- Some cont_label;
948
+
(* Init *)
949
+
(match init with
950
+
| Some (Ast.For_init_var decl) -> compile_var_decl comp decl
951
+
| Some (Ast.For_init_expr expr) ->
952
+
compile_expr comp expr;
953
+
emit_op comp Opcode.OP_drop;
954
+
Bytecode.update_stack comp.builder 1 0
955
+
| None -> ());
956
+
(* Test *)
957
+
Bytecode.define_label comp.builder start_label;
958
+
(match test with
959
+
| Some expr ->
960
+
compile_expr comp expr;
961
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_if_false end_label);
962
+
Bytecode.update_stack comp.builder 1 0
963
+
| None -> ());
964
+
(* Body *)
965
+
compile_stmt comp body;
966
+
(* Update *)
967
+
Bytecode.define_label comp.builder cont_label;
968
+
(match update with
969
+
| Some expr ->
970
+
compile_expr comp expr;
971
+
emit_op comp Opcode.OP_drop;
972
+
Bytecode.update_stack comp.builder 1 0
973
+
| None -> ());
974
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_goto start_label);
975
+
Bytecode.define_label comp.builder end_label;
976
+
comp.break_label <- old_break;
977
+
comp.continue_label <- old_continue
978
+
979
+
(** Compile a for-in loop *)
980
+
and compile_for_in comp left right body =
981
+
let start_label = Bytecode.new_label comp.builder in
982
+
let end_label = Bytecode.new_label comp.builder in
983
+
let old_break = comp.break_label in
984
+
let old_continue = comp.continue_label in
985
+
comp.break_label <- Some end_label;
986
+
comp.continue_label <- Some start_label;
987
+
compile_expr comp right;
988
+
emit_op comp Opcode.OP_for_in_start;
989
+
Bytecode.define_label comp.builder start_label;
990
+
emit_op comp Opcode.OP_for_in_next;
991
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_if_false end_label);
992
+
Bytecode.update_stack comp.builder 1 0;
993
+
(* Assign to left *)
994
+
(match left with
995
+
| Ast.For_in_var decl -> compile_var_decl comp decl
996
+
| Ast.For_in_pat _pat -> ());
997
+
compile_stmt comp body;
998
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_goto start_label);
999
+
Bytecode.define_label comp.builder end_label;
1000
+
emit_op comp Opcode.OP_drop;
1001
+
Bytecode.update_stack comp.builder 1 0;
1002
+
comp.break_label <- old_break;
1003
+
comp.continue_label <- old_continue
1004
+
1005
+
(** Compile a for-of loop *)
1006
+
and compile_for_of comp left right body await =
1007
+
let start_label = Bytecode.new_label comp.builder in
1008
+
let end_label = Bytecode.new_label comp.builder in
1009
+
let old_break = comp.break_label in
1010
+
let old_continue = comp.continue_label in
1011
+
comp.break_label <- Some end_label;
1012
+
comp.continue_label <- Some start_label;
1013
+
compile_expr comp right;
1014
+
emit_op comp (if await then Opcode.OP_for_await_of_start else Opcode.OP_for_of_start);
1015
+
Bytecode.define_label comp.builder start_label;
1016
+
emit_op comp (if await then Opcode.OP_for_await_of_next else Opcode.OP_for_of_next);
1017
+
Bytecode.emit_u8 comp.builder 0;
1018
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_if_true end_label);
1019
+
Bytecode.update_stack comp.builder 1 0;
1020
+
(* Assign to left *)
1021
+
(match left with
1022
+
| Ast.For_in_var decl -> compile_var_decl comp decl
1023
+
| Ast.For_in_pat _pat -> ());
1024
+
compile_stmt comp body;
1025
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_goto start_label);
1026
+
Bytecode.define_label comp.builder end_label;
1027
+
emit_op comp Opcode.OP_iterator_close;
1028
+
Bytecode.update_stack comp.builder 3 0;
1029
+
comp.break_label <- old_break;
1030
+
comp.continue_label <- old_continue
1031
+
1032
+
(** Compile a try-catch-finally *)
1033
+
and compile_try comp block handler finalizer =
1034
+
let catch_label = Bytecode.new_label comp.builder in
1035
+
let finally_label = Bytecode.new_label comp.builder in
1036
+
let end_label = Bytecode.new_label comp.builder in
1037
+
(* Try block *)
1038
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_catch catch_label);
1039
+
compile_stmt comp block;
1040
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_goto
1041
+
(match finalizer with Some _ -> finally_label | None -> end_label));
1042
+
(* Catch block *)
1043
+
Bytecode.define_label comp.builder catch_label;
1044
+
(match handler with
1045
+
| Some { catch_param; catch_body; _ } ->
1046
+
(match catch_param with
1047
+
| Some param ->
1048
+
(match param.pat with
1049
+
| Ast.Pat_identifier id ->
1050
+
let idx = Bytecode.add_var comp.builder id.name Bytecode.Var_catch in
1051
+
emit_op comp Opcode.OP_put_loc;
1052
+
Bytecode.emit_u16 comp.builder idx
1053
+
| _ -> emit_op comp Opcode.OP_drop)
1054
+
| None -> emit_op comp Opcode.OP_drop);
1055
+
Bytecode.update_stack comp.builder 1 0;
1056
+
compile_stmt comp catch_body;
1057
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_goto
1058
+
(match finalizer with Some _ -> finally_label | None -> end_label))
1059
+
| None -> ());
1060
+
(* Finally block *)
1061
+
(match finalizer with
1062
+
| Some fin ->
1063
+
Bytecode.define_label comp.builder finally_label;
1064
+
compile_stmt comp fin
1065
+
| None -> ());
1066
+
Bytecode.define_label comp.builder end_label
1067
+
1068
+
(** Compile a switch statement *)
1069
+
and compile_switch comp discriminant cases =
1070
+
let end_label = Bytecode.new_label comp.builder in
1071
+
let old_break = comp.break_label in
1072
+
comp.break_label <- Some end_label;
1073
+
compile_expr comp discriminant;
1074
+
(* Build case labels *)
1075
+
let case_labels = List.map (fun _ -> Bytecode.new_label comp.builder) cases in
1076
+
let default_label = ref None in
1077
+
(* Emit case tests *)
1078
+
List.iter2 (fun case label ->
1079
+
match case.Ast.case_test with
1080
+
| None ->
1081
+
default_label := Some label
1082
+
| Some test ->
1083
+
emit_op comp Opcode.OP_dup;
1084
+
Bytecode.update_stack comp.builder 0 1;
1085
+
compile_expr comp test;
1086
+
emit_op comp Opcode.OP_strict_eq;
1087
+
Bytecode.update_stack comp.builder 2 1;
1088
+
ignore (Bytecode.emit_goto comp.builder Opcode.OP_if_true label)
1089
+
) cases case_labels;
1090
+
(* Jump to default or end *)
1091
+
(match !default_label with
1092
+
| Some label -> ignore (Bytecode.emit_goto comp.builder Opcode.OP_goto label)
1093
+
| None -> ignore (Bytecode.emit_goto comp.builder Opcode.OP_goto end_label));
1094
+
(* Compile case bodies *)
1095
+
emit_op comp Opcode.OP_drop;
1096
+
Bytecode.update_stack comp.builder 1 0;
1097
+
List.iter2 (fun case label ->
1098
+
Bytecode.define_label comp.builder label;
1099
+
List.iter (compile_stmt comp) case.Ast.case_consequent
1100
+
) cases case_labels;
1101
+
Bytecode.define_label comp.builder end_label;
1102
+
comp.break_label <- old_break
1103
+
1104
+
(** Compile a function declaration *)
1105
+
and compile_function_decl comp fd =
1106
+
let func_comp = create ~source_file:comp.builder.source_file () in
1107
+
func_comp.in_function <- true;
1108
+
func_comp.in_generator <- fd.fd_generator;
1109
+
func_comp.in_async <- fd.fd_async;
1110
+
(* Add parameters *)
1111
+
List.iter (fun param ->
1112
+
match param.Ast.pat with
1113
+
| Ast.Pat_identifier id ->
1114
+
ignore (Bytecode.add_var func_comp.builder id.name Bytecode.Var_argument)
1115
+
| _ -> ()
1116
+
) fd.fd_params;
1117
+
(* Compile body *)
1118
+
compile_function_body func_comp fd.fd_body;
1119
+
let func_bc = Bytecode.build func_comp.builder
1120
+
~name:(Some fd.fd_id.name)
1121
+
~arg_count:(List.length fd.fd_params)
1122
+
~is_generator:fd.fd_generator
1123
+
~is_async:fd.fd_async
1124
+
~is_arrow:false
1125
+
in
1126
+
(* Bind function to name *)
1127
+
let idx = Bytecode.add_constant comp.builder (Bytecode.Const_function func_bc) in
1128
+
let var_idx = Bytecode.add_var comp.builder fd.fd_id.name Bytecode.Var_function in
1129
+
emit_op comp Opcode.OP_fclosure;
1130
+
Bytecode.emit_u32 comp.builder idx;
1131
+
emit_op comp Opcode.OP_put_loc;
1132
+
Bytecode.emit_u16 comp.builder var_idx;
1133
+
Bytecode.update_stack comp.builder 0 0
1134
+
1135
+
(** Compile a class declaration *)
1136
+
and compile_class_decl comp cd =
1137
+
let cls_expr = {
1138
+
Ast.cls_id = Some cd.cd_id;
1139
+
cls_super = cd.cd_super;
1140
+
cls_body = cd.cd_body;
1141
+
} in
1142
+
compile_class_expr comp cls_expr;
1143
+
(* Bind to name *)
1144
+
let var_idx = Bytecode.add_var comp.builder cd.cd_id.name Bytecode.Var_let in
1145
+
emit_op comp Opcode.OP_put_loc;
1146
+
Bytecode.emit_u16 comp.builder var_idx;
1147
+
Bytecode.update_stack comp.builder 1 0
1148
+
1149
+
(** Compile a program for eval (returns last expression value) *)
1150
+
let compile_program ?(source_file="") (program : Ast.program) =
1151
+
let comp = create ~source_file () in
1152
+
let items = program.body in
1153
+
let len = List.length items in
1154
+
List.iteri (fun i item ->
1155
+
match item with
1156
+
| Ast.Stmt stmt ->
1157
+
let is_last = (i = len - 1) in
1158
+
(match stmt.stmt with
1159
+
| Ast.Expression expr when is_last ->
1160
+
(* Keep last expression value on stack *)
1161
+
compile_expr comp expr;
1162
+
emit_op comp Opcode.OP_return;
1163
+
Bytecode.update_stack comp.builder 1 0
1164
+
| _ ->
1165
+
compile_stmt comp stmt;
1166
+
if is_last then begin
1167
+
emit_op comp Opcode.OP_return_undef
1168
+
end)
1169
+
| Ast.Module_decl _ -> () (* Module declarations handled separately *)
1170
+
) items;
1171
+
if len = 0 then emit_op comp Opcode.OP_return_undef;
1172
+
Bytecode.build comp.builder
1173
+
~name:(Some "<main>")
1174
+
~arg_count:0
1175
+
~is_generator:false
1176
+
~is_async:false
1177
+
~is_arrow:false
+4
lib/quickjs/compiler/dune
+4
lib/quickjs/compiler/dune
+644
lib/quickjs/compiler/opcode.ml
+644
lib/quickjs/compiler/opcode.ml
···
1
+
(** QuickJS Bytecode Opcodes.
2
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Based on the QuickJS opcode definitions. Each opcode includes information
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about its size, stack effects, and operand format. *)
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(** Operand format for opcodes *)
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type operand_format =
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| Fmt_none (** No operand *)
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| Fmt_u8 (** Unsigned 8-bit *)
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| Fmt_i8 (** Signed 8-bit *)
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| Fmt_u16 (** Unsigned 16-bit *)
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| Fmt_i16 (** Signed 16-bit *)
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| Fmt_u32 (** Unsigned 32-bit *)
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| Fmt_i32 (** Signed 32-bit *)
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| Fmt_const (** Constant pool index (32-bit) *)
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| Fmt_atom (** Atom index (32-bit) *)
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| Fmt_label (** Label/jump offset (32-bit) *)
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| Fmt_loc (** Local variable index (16-bit) *)
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| Fmt_arg (** Argument index (16-bit) *)
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| Fmt_var_ref (** Variable reference (16-bit) *)
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| Fmt_npop (** Number to pop (16-bit) *)
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| Fmt_atom_u8 (** Atom + u8 *)
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| Fmt_atom_u16 (** Atom + u16 *)
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| Fmt_atom_label_u8 (** Atom + label + u8 *)
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| Fmt_label_u16 (** Label + u16 *)
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(** Bytecode opcodes *)
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type t =
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(* Invalid/placeholder *)
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| OP_invalid
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(* Push values *)
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| OP_push_i32
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| OP_push_const
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| OP_fclosure
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| OP_push_atom_value
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| OP_private_symbol
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| OP_undefined
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| OP_null
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| OP_push_this
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| OP_push_false
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| OP_push_true
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| OP_object
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| OP_special_object
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| OP_rest
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(* Stack manipulation *)
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| OP_drop
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| OP_nip
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| OP_nip1
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| OP_dup
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| OP_dup1
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| OP_dup2
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| OP_dup3
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| OP_insert2
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| OP_insert3
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| OP_insert4
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| OP_perm3
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| OP_perm4
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| OP_perm5
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| OP_swap
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| OP_swap2
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| OP_rot3l
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| OP_rot3r
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| OP_rot4l
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| OP_rot5l
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(* Function calls *)
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| OP_call_constructor
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| OP_call
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| OP_tail_call
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| OP_call_method
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| OP_tail_call_method
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| OP_array_from
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| OP_apply
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| OP_return
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| OP_return_undef
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| OP_check_ctor_return
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| OP_check_ctor
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| OP_init_ctor
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| OP_check_brand
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| OP_add_brand
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| OP_return_async
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| OP_throw
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| OP_throw_error
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| OP_eval
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| OP_apply_eval
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| OP_regexp
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| OP_get_super
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| OP_import
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(* Variable access *)
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| OP_get_var_undef
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| OP_get_var
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| OP_put_var
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| OP_put_var_init
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| OP_get_ref_value
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| OP_put_ref_value
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(* Property access *)
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| OP_get_field
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| OP_get_field2
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| OP_put_field
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| OP_get_private_field
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| OP_put_private_field
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| OP_define_private_field
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| OP_get_array_el
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| OP_get_array_el2
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| OP_get_array_el3
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| OP_put_array_el
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| OP_get_super_value
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| OP_put_super_value
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| OP_define_field
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| OP_set_name
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| OP_set_name_computed
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| OP_set_proto
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| OP_set_home_object
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| OP_define_array_el
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| OP_append
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| OP_copy_data_properties
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| OP_define_method
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| OP_define_method_computed
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| OP_define_class
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| OP_define_class_computed
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(* Local/argument access *)
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| OP_get_loc
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| OP_put_loc
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| OP_set_loc
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| OP_get_arg
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| OP_put_arg
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| OP_set_arg
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| OP_get_var_ref
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| OP_put_var_ref
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| OP_set_var_ref
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| OP_set_loc_uninitialized
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| OP_get_loc_check
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| OP_put_loc_check
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| OP_set_loc_check
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| OP_put_loc_check_init
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| OP_get_loc_checkthis
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| OP_get_var_ref_check
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| OP_put_var_ref_check
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| OP_put_var_ref_check_init
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| OP_close_loc
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(* Control flow *)
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| OP_if_false
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| OP_if_true
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| OP_goto
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| OP_catch
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| OP_gosub
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| OP_ret
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| OP_nip_catch
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(* Type conversion *)
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| OP_to_object
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| OP_to_propkey
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(* With statement *)
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| OP_with_get_var
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| OP_with_put_var
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| OP_with_delete_var
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| OP_with_make_ref
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| OP_with_get_ref
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(* Reference creation *)
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| OP_make_loc_ref
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| OP_make_arg_ref
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| OP_make_var_ref_ref
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| OP_make_var_ref
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(* Iteration *)
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| OP_for_in_start
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| OP_for_of_start
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| OP_for_await_of_start
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| OP_for_in_next
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| OP_for_of_next
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| OP_for_await_of_next
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| OP_iterator_check_object
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| OP_iterator_get_value_done
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| OP_iterator_close
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| OP_iterator_next
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| OP_iterator_call
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| OP_initial_yield
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| OP_yield
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| OP_yield_star
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| OP_async_yield_star
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| OP_await
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(* Arithmetic/logic *)
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| OP_neg
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| OP_plus
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| OP_dec
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| OP_inc
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| OP_post_dec
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| OP_post_inc
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| OP_dec_loc
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| OP_inc_loc
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| OP_add_loc
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| OP_not
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| OP_lnot
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| OP_typeof
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| OP_delete
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| OP_delete_var
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(* Binary operations *)
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| OP_mul
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| OP_div
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| OP_mod
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| OP_add
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| OP_sub
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| OP_pow
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| OP_shl
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| OP_sar
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| OP_shr
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| OP_lt
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| OP_lte
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| OP_gt
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| OP_gte
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| OP_instanceof
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| OP_in
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| OP_eq
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| OP_neq
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| OP_strict_eq
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| OP_strict_neq
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| OP_and
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| OP_xor
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| OP_or
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| OP_is_undefined_or_null
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| OP_private_in
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| OP_push_bigint_i32
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(* No-op *)
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| OP_nop
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(* Short opcodes for common cases *)
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| OP_push_minus1
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| OP_push_0
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| OP_push_1
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| OP_push_2
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| OP_push_3
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| OP_push_4
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| OP_push_5
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| OP_push_6
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| OP_push_7
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| OP_push_i8
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| OP_push_i16
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| OP_push_const8
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| OP_fclosure8
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| OP_push_empty_string
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| OP_get_loc8
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| OP_put_loc8
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| OP_set_loc8
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| OP_get_loc0
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| OP_get_loc1
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| OP_get_loc2
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| OP_get_loc3
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| OP_put_loc0
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| OP_put_loc1
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| OP_put_loc2
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| OP_put_loc3
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| OP_set_loc0
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| OP_set_loc1
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| OP_set_loc2
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| OP_set_loc3
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| OP_get_arg0
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| OP_get_arg1
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| OP_get_arg2
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| OP_get_arg3
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| OP_put_arg0
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| OP_put_arg1
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| OP_put_arg2
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| OP_put_arg3
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| OP_set_arg0
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| OP_set_arg1
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| OP_set_arg2
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| OP_set_arg3
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| OP_get_var_ref0
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| OP_get_var_ref1
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| OP_get_var_ref2
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| OP_get_var_ref3
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| OP_put_var_ref0
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| OP_put_var_ref1
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| OP_put_var_ref2
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| OP_put_var_ref3
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| OP_set_var_ref0
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| OP_set_var_ref1
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| OP_set_var_ref2
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| OP_set_var_ref3
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| OP_get_length
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| OP_if_false8
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| OP_if_true8
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| OP_goto8
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| OP_goto16
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| OP_call0
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| OP_call1
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| OP_call2
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| OP_call3
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| OP_is_undefined
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| OP_is_null
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| OP_typeof_is_undefined
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| OP_typeof_is_function
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(** Get the size of an opcode instruction in bytes *)
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let size = function
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| OP_invalid -> 1
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| OP_push_i32 -> 5
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| OP_push_const -> 5
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| OP_fclosure -> 5
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| OP_push_atom_value -> 5
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| OP_private_symbol -> 5
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| OP_undefined | OP_null | OP_push_this
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| OP_push_false | OP_push_true | OP_object -> 1
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| OP_special_object -> 2
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| OP_rest -> 3
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| OP_drop | OP_nip | OP_nip1 | OP_dup | OP_dup1 | OP_dup2 | OP_dup3
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| OP_insert2 | OP_insert3 | OP_insert4 | OP_perm3 | OP_perm4 | OP_perm5
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| OP_swap | OP_swap2 | OP_rot3l | OP_rot3r | OP_rot4l | OP_rot5l -> 1
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| OP_call_constructor | OP_call | OP_tail_call
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| OP_call_method | OP_tail_call_method | OP_array_from -> 3
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| OP_apply -> 3
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| OP_return | OP_return_undef | OP_check_ctor_return
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| OP_check_ctor | OP_init_ctor | OP_check_brand | OP_add_brand
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| OP_return_async | OP_throw -> 1
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| OP_throw_error -> 6
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| OP_eval -> 5
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| OP_apply_eval -> 3
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| OP_regexp | OP_get_super | OP_import -> 1
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| OP_get_var_undef | OP_get_var | OP_put_var | OP_put_var_init -> 3
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| OP_get_ref_value | OP_put_ref_value -> 1
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| OP_get_field | OP_get_field2 | OP_put_field -> 5
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| OP_get_private_field | OP_put_private_field | OP_define_private_field -> 1
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| OP_get_array_el | OP_get_array_el2 | OP_get_array_el3 | OP_put_array_el -> 1
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| OP_get_super_value | OP_put_super_value -> 1
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| OP_define_field | OP_set_name -> 5
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| OP_set_name_computed | OP_set_proto | OP_set_home_object
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| OP_define_array_el | OP_append -> 1
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| OP_copy_data_properties -> 2
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| OP_define_method -> 6
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| OP_define_method_computed -> 2
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| OP_define_class | OP_define_class_computed -> 6
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| OP_get_loc | OP_put_loc | OP_set_loc
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| OP_get_arg | OP_put_arg | OP_set_arg
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| OP_get_var_ref | OP_put_var_ref | OP_set_var_ref -> 3
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| OP_set_loc_uninitialized | OP_get_loc_check
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| OP_put_loc_check | OP_set_loc_check | OP_put_loc_check_init
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| OP_get_loc_checkthis | OP_get_var_ref_check
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| OP_put_var_ref_check | OP_put_var_ref_check_init | OP_close_loc -> 3
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| OP_if_false | OP_if_true | OP_goto | OP_catch | OP_gosub -> 5
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| OP_ret | OP_nip_catch -> 1
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| OP_to_object | OP_to_propkey -> 1
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| OP_with_get_var | OP_with_put_var | OP_with_delete_var
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| OP_with_make_ref | OP_with_get_ref -> 10
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| OP_make_loc_ref | OP_make_arg_ref | OP_make_var_ref_ref -> 7
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| OP_make_var_ref -> 5
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| OP_for_in_start | OP_for_of_start | OP_for_await_of_start
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| OP_for_in_next -> 1
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| OP_for_of_next -> 2
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| OP_for_await_of_next | OP_iterator_check_object
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| OP_iterator_get_value_done | OP_iterator_close | OP_iterator_next -> 1
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| OP_iterator_call -> 2
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| OP_initial_yield | OP_yield | OP_yield_star
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| OP_async_yield_star | OP_await -> 1
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| OP_neg | OP_plus | OP_dec | OP_inc | OP_post_dec | OP_post_inc -> 1
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| OP_dec_loc | OP_inc_loc | OP_add_loc -> 2
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| OP_not | OP_lnot | OP_typeof | OP_delete -> 1
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| OP_delete_var -> 5
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| OP_mul | OP_div | OP_mod | OP_add | OP_sub | OP_pow
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| OP_shl | OP_sar | OP_shr | OP_lt | OP_lte | OP_gt | OP_gte
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| OP_instanceof | OP_in | OP_eq | OP_neq | OP_strict_eq | OP_strict_neq
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| OP_and | OP_xor | OP_or | OP_is_undefined_or_null | OP_private_in -> 1
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| OP_push_bigint_i32 -> 5
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| OP_nop -> 1
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(* Short opcodes *)
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| OP_push_minus1 | OP_push_0 | OP_push_1 | OP_push_2
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| OP_push_3 | OP_push_4 | OP_push_5 | OP_push_6 | OP_push_7 -> 1
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| OP_push_i8 -> 2
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| OP_push_i16 -> 3
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| OP_push_const8 | OP_fclosure8 -> 2
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| OP_push_empty_string -> 1
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| OP_get_loc8 | OP_put_loc8 | OP_set_loc8 -> 2
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| OP_get_loc0 | OP_get_loc1 | OP_get_loc2 | OP_get_loc3
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| OP_put_loc0 | OP_put_loc1 | OP_put_loc2 | OP_put_loc3
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| OP_set_loc0 | OP_set_loc1 | OP_set_loc2 | OP_set_loc3 -> 1
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| OP_get_arg0 | OP_get_arg1 | OP_get_arg2 | OP_get_arg3
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| OP_put_arg0 | OP_put_arg1 | OP_put_arg2 | OP_put_arg3
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| OP_set_arg0 | OP_set_arg1 | OP_set_arg2 | OP_set_arg3 -> 1
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| OP_get_var_ref0 | OP_get_var_ref1 | OP_get_var_ref2 | OP_get_var_ref3
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| OP_put_var_ref0 | OP_put_var_ref1 | OP_put_var_ref2 | OP_put_var_ref3
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| OP_set_var_ref0 | OP_set_var_ref1 | OP_set_var_ref2 | OP_set_var_ref3 -> 1
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| OP_get_length -> 1
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| OP_if_false8 | OP_if_true8 | OP_goto8 -> 2
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| OP_goto16 -> 3
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| OP_call0 | OP_call1 | OP_call2 | OP_call3 -> 1
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| OP_is_undefined | OP_is_null
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| OP_typeof_is_undefined | OP_typeof_is_function -> 1
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+
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(** Convert opcode to string for debugging *)
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let to_string = function
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| OP_invalid -> "invalid"
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| OP_push_i32 -> "push_i32"
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| OP_push_const -> "push_const"
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| OP_fclosure -> "fclosure"
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| OP_push_atom_value -> "push_atom_value"
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| OP_private_symbol -> "private_symbol"
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| OP_undefined -> "undefined"
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| OP_null -> "null"
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| OP_push_this -> "push_this"
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+
| OP_push_false -> "push_false"
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| OP_push_true -> "push_true"
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| OP_object -> "object"
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| OP_special_object -> "special_object"
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| OP_rest -> "rest"
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| OP_drop -> "drop"
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| OP_nip -> "nip"
417
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| OP_nip1 -> "nip1"
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| OP_dup -> "dup"
419
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| OP_dup1 -> "dup1"
420
+
| OP_dup2 -> "dup2"
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+
| OP_dup3 -> "dup3"
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| OP_insert2 -> "insert2"
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| OP_insert3 -> "insert3"
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| OP_insert4 -> "insert4"
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| OP_perm3 -> "perm3"
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| OP_perm4 -> "perm4"
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+
| OP_perm5 -> "perm5"
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| OP_swap -> "swap"
429
+
| OP_swap2 -> "swap2"
430
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| OP_rot3l -> "rot3l"
431
+
| OP_rot3r -> "rot3r"
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| OP_rot4l -> "rot4l"
433
+
| OP_rot5l -> "rot5l"
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| OP_call_constructor -> "call_constructor"
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| OP_call -> "call"
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| OP_tail_call -> "tail_call"
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| OP_call_method -> "call_method"
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| OP_tail_call_method -> "tail_call_method"
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| OP_array_from -> "array_from"
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| OP_apply -> "apply"
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| OP_return -> "return"
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+
| OP_return_undef -> "return_undef"
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| OP_check_ctor_return -> "check_ctor_return"
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| OP_check_ctor -> "check_ctor"
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| OP_init_ctor -> "init_ctor"
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| OP_check_brand -> "check_brand"
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| OP_add_brand -> "add_brand"
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+
| OP_return_async -> "return_async"
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+
| OP_throw -> "throw"
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+
| OP_throw_error -> "throw_error"
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+
| OP_eval -> "eval"
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+
| OP_apply_eval -> "apply_eval"
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+
| OP_regexp -> "regexp"
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+
| OP_get_super -> "get_super"
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+
| OP_import -> "import"
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+
| OP_get_var_undef -> "get_var_undef"
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+
| OP_get_var -> "get_var"
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+
| OP_put_var -> "put_var"
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+
| OP_put_var_init -> "put_var_init"
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+
| OP_get_ref_value -> "get_ref_value"
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+
| OP_put_ref_value -> "put_ref_value"
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+
| OP_get_field -> "get_field"
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+
| OP_get_field2 -> "get_field2"
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+
| OP_put_field -> "put_field"
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+
| OP_get_private_field -> "get_private_field"
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+
| OP_put_private_field -> "put_private_field"
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+
| OP_define_private_field -> "define_private_field"
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| OP_get_array_el -> "get_array_el"
469
+
| OP_get_array_el2 -> "get_array_el2"
470
+
| OP_get_array_el3 -> "get_array_el3"
471
+
| OP_put_array_el -> "put_array_el"
472
+
| OP_get_super_value -> "get_super_value"
473
+
| OP_put_super_value -> "put_super_value"
474
+
| OP_define_field -> "define_field"
475
+
| OP_set_name -> "set_name"
476
+
| OP_set_name_computed -> "set_name_computed"
477
+
| OP_set_proto -> "set_proto"
478
+
| OP_set_home_object -> "set_home_object"
479
+
| OP_define_array_el -> "define_array_el"
480
+
| OP_append -> "append"
481
+
| OP_copy_data_properties -> "copy_data_properties"
482
+
| OP_define_method -> "define_method"
483
+
| OP_define_method_computed -> "define_method_computed"
484
+
| OP_define_class -> "define_class"
485
+
| OP_define_class_computed -> "define_class_computed"
486
+
| OP_get_loc -> "get_loc"
487
+
| OP_put_loc -> "put_loc"
488
+
| OP_set_loc -> "set_loc"
489
+
| OP_get_arg -> "get_arg"
490
+
| OP_put_arg -> "put_arg"
491
+
| OP_set_arg -> "set_arg"
492
+
| OP_get_var_ref -> "get_var_ref"
493
+
| OP_put_var_ref -> "put_var_ref"
494
+
| OP_set_var_ref -> "set_var_ref"
495
+
| OP_set_loc_uninitialized -> "set_loc_uninitialized"
496
+
| OP_get_loc_check -> "get_loc_check"
497
+
| OP_put_loc_check -> "put_loc_check"
498
+
| OP_set_loc_check -> "set_loc_check"
499
+
| OP_put_loc_check_init -> "put_loc_check_init"
500
+
| OP_get_loc_checkthis -> "get_loc_checkthis"
501
+
| OP_get_var_ref_check -> "get_var_ref_check"
502
+
| OP_put_var_ref_check -> "put_var_ref_check"
503
+
| OP_put_var_ref_check_init -> "put_var_ref_check_init"
504
+
| OP_close_loc -> "close_loc"
505
+
| OP_if_false -> "if_false"
506
+
| OP_if_true -> "if_true"
507
+
| OP_goto -> "goto"
508
+
| OP_catch -> "catch"
509
+
| OP_gosub -> "gosub"
510
+
| OP_ret -> "ret"
511
+
| OP_nip_catch -> "nip_catch"
512
+
| OP_to_object -> "to_object"
513
+
| OP_to_propkey -> "to_propkey"
514
+
| OP_with_get_var -> "with_get_var"
515
+
| OP_with_put_var -> "with_put_var"
516
+
| OP_with_delete_var -> "with_delete_var"
517
+
| OP_with_make_ref -> "with_make_ref"
518
+
| OP_with_get_ref -> "with_get_ref"
519
+
| OP_make_loc_ref -> "make_loc_ref"
520
+
| OP_make_arg_ref -> "make_arg_ref"
521
+
| OP_make_var_ref_ref -> "make_var_ref_ref"
522
+
| OP_make_var_ref -> "make_var_ref"
523
+
| OP_for_in_start -> "for_in_start"
524
+
| OP_for_of_start -> "for_of_start"
525
+
| OP_for_await_of_start -> "for_await_of_start"
526
+
| OP_for_in_next -> "for_in_next"
527
+
| OP_for_of_next -> "for_of_next"
528
+
| OP_for_await_of_next -> "for_await_of_next"
529
+
| OP_iterator_check_object -> "iterator_check_object"
530
+
| OP_iterator_get_value_done -> "iterator_get_value_done"
531
+
| OP_iterator_close -> "iterator_close"
532
+
| OP_iterator_next -> "iterator_next"
533
+
| OP_iterator_call -> "iterator_call"
534
+
| OP_initial_yield -> "initial_yield"
535
+
| OP_yield -> "yield"
536
+
| OP_yield_star -> "yield_star"
537
+
| OP_async_yield_star -> "async_yield_star"
538
+
| OP_await -> "await"
539
+
| OP_neg -> "neg"
540
+
| OP_plus -> "plus"
541
+
| OP_dec -> "dec"
542
+
| OP_inc -> "inc"
543
+
| OP_post_dec -> "post_dec"
544
+
| OP_post_inc -> "post_inc"
545
+
| OP_dec_loc -> "dec_loc"
546
+
| OP_inc_loc -> "inc_loc"
547
+
| OP_add_loc -> "add_loc"
548
+
| OP_not -> "not"
549
+
| OP_lnot -> "lnot"
550
+
| OP_typeof -> "typeof"
551
+
| OP_delete -> "delete"
552
+
| OP_delete_var -> "delete_var"
553
+
| OP_mul -> "mul"
554
+
| OP_div -> "div"
555
+
| OP_mod -> "mod"
556
+
| OP_add -> "add"
557
+
| OP_sub -> "sub"
558
+
| OP_pow -> "pow"
559
+
| OP_shl -> "shl"
560
+
| OP_sar -> "sar"
561
+
| OP_shr -> "shr"
562
+
| OP_lt -> "lt"
563
+
| OP_lte -> "lte"
564
+
| OP_gt -> "gt"
565
+
| OP_gte -> "gte"
566
+
| OP_instanceof -> "instanceof"
567
+
| OP_in -> "in"
568
+
| OP_eq -> "eq"
569
+
| OP_neq -> "neq"
570
+
| OP_strict_eq -> "strict_eq"
571
+
| OP_strict_neq -> "strict_neq"
572
+
| OP_and -> "and"
573
+
| OP_xor -> "xor"
574
+
| OP_or -> "or"
575
+
| OP_is_undefined_or_null -> "is_undefined_or_null"
576
+
| OP_private_in -> "private_in"
577
+
| OP_push_bigint_i32 -> "push_bigint_i32"
578
+
| OP_nop -> "nop"
579
+
| OP_push_minus1 -> "push_minus1"
580
+
| OP_push_0 -> "push_0"
581
+
| OP_push_1 -> "push_1"
582
+
| OP_push_2 -> "push_2"
583
+
| OP_push_3 -> "push_3"
584
+
| OP_push_4 -> "push_4"
585
+
| OP_push_5 -> "push_5"
586
+
| OP_push_6 -> "push_6"
587
+
| OP_push_7 -> "push_7"
588
+
| OP_push_i8 -> "push_i8"
589
+
| OP_push_i16 -> "push_i16"
590
+
| OP_push_const8 -> "push_const8"
591
+
| OP_fclosure8 -> "fclosure8"
592
+
| OP_push_empty_string -> "push_empty_string"
593
+
| OP_get_loc8 -> "get_loc8"
594
+
| OP_put_loc8 -> "put_loc8"
595
+
| OP_set_loc8 -> "set_loc8"
596
+
| OP_get_loc0 -> "get_loc0"
597
+
| OP_get_loc1 -> "get_loc1"
598
+
| OP_get_loc2 -> "get_loc2"
599
+
| OP_get_loc3 -> "get_loc3"
600
+
| OP_put_loc0 -> "put_loc0"
601
+
| OP_put_loc1 -> "put_loc1"
602
+
| OP_put_loc2 -> "put_loc2"
603
+
| OP_put_loc3 -> "put_loc3"
604
+
| OP_set_loc0 -> "set_loc0"
605
+
| OP_set_loc1 -> "set_loc1"
606
+
| OP_set_loc2 -> "set_loc2"
607
+
| OP_set_loc3 -> "set_loc3"
608
+
| OP_get_arg0 -> "get_arg0"
609
+
| OP_get_arg1 -> "get_arg1"
610
+
| OP_get_arg2 -> "get_arg2"
611
+
| OP_get_arg3 -> "get_arg3"
612
+
| OP_put_arg0 -> "put_arg0"
613
+
| OP_put_arg1 -> "put_arg1"
614
+
| OP_put_arg2 -> "put_arg2"
615
+
| OP_put_arg3 -> "put_arg3"
616
+
| OP_set_arg0 -> "set_arg0"
617
+
| OP_set_arg1 -> "set_arg1"
618
+
| OP_set_arg2 -> "set_arg2"
619
+
| OP_set_arg3 -> "set_arg3"
620
+
| OP_get_var_ref0 -> "get_var_ref0"
621
+
| OP_get_var_ref1 -> "get_var_ref1"
622
+
| OP_get_var_ref2 -> "get_var_ref2"
623
+
| OP_get_var_ref3 -> "get_var_ref3"
624
+
| OP_put_var_ref0 -> "put_var_ref0"
625
+
| OP_put_var_ref1 -> "put_var_ref1"
626
+
| OP_put_var_ref2 -> "put_var_ref2"
627
+
| OP_put_var_ref3 -> "put_var_ref3"
628
+
| OP_set_var_ref0 -> "set_var_ref0"
629
+
| OP_set_var_ref1 -> "set_var_ref1"
630
+
| OP_set_var_ref2 -> "set_var_ref2"
631
+
| OP_set_var_ref3 -> "set_var_ref3"
632
+
| OP_get_length -> "get_length"
633
+
| OP_if_false8 -> "if_false8"
634
+
| OP_if_true8 -> "if_true8"
635
+
| OP_goto8 -> "goto8"
636
+
| OP_goto16 -> "goto16"
637
+
| OP_call0 -> "call0"
638
+
| OP_call1 -> "call1"
639
+
| OP_call2 -> "call2"
640
+
| OP_call3 -> "call3"
641
+
| OP_is_undefined -> "is_undefined"
642
+
| OP_is_null -> "is_null"
643
+
| OP_typeof_is_undefined -> "typeof_is_undefined"
644
+
| OP_typeof_is_function -> "typeof_is_function"
+437
lib/quickjs/parser/ast.ml
+437
lib/quickjs/parser/ast.ml
···
1
+
(** JavaScript Abstract Syntax Tree.
2
+
3
+
Based on ESTree specification but adapted for OCaml idioms.
4
+
All nodes include location information for error messages. *)
5
+
6
+
open Source
7
+
8
+
(** Identifier with location *)
9
+
type identifier = {
10
+
name : string;
11
+
loc : loc;
12
+
}
13
+
14
+
(** Literal values *)
15
+
type literal =
16
+
| Lit_null
17
+
| Lit_bool of bool
18
+
| Lit_number of float
19
+
| Lit_bigint of string (* Original text representation *)
20
+
| Lit_string of string
21
+
| Lit_regexp of { pattern : string; flags : string }
22
+
23
+
(** Template literal part *)
24
+
type template_element = {
25
+
raw : string;
26
+
cooked : string option; (* None if contains invalid escape *)
27
+
tail : bool;
28
+
}
29
+
30
+
(** Assignment operators *)
31
+
type assignment_operator =
32
+
| Assign (* = *)
33
+
| Plus_assign (* += *)
34
+
| Minus_assign (* -= *)
35
+
| Times_assign (* *= *)
36
+
| Div_assign (* /= *)
37
+
| Mod_assign (* %= *)
38
+
| Exp_assign (* **= *)
39
+
| Lshift_assign (* <<= *)
40
+
| Rshift_assign (* >>= *)
41
+
| Urshift_assign (* >>>= *)
42
+
| Bitor_assign (* |= *)
43
+
| Bitxor_assign (* ^= *)
44
+
| Bitand_assign (* &= *)
45
+
| Or_assign (* ||= *)
46
+
| And_assign (* &&= *)
47
+
| Nullish_assign (* ??= *)
48
+
49
+
(** Binary operators *)
50
+
type binary_operator =
51
+
| Eq | Neq | Strict_eq | Strict_neq
52
+
| Lt | Lte | Gt | Gte
53
+
| Plus | Minus | Times | Div | Mod | Exp
54
+
| Bitor | Bitxor | Bitand
55
+
| Lshift | Rshift | Urshift
56
+
| In | Instanceof
57
+
58
+
(** Logical operators *)
59
+
type logical_operator =
60
+
| Or | And | Nullish
61
+
62
+
(** Unary operators *)
63
+
type unary_operator =
64
+
| Neg | Pos | Not | Bitnot
65
+
| Typeof | Void | Delete
66
+
67
+
(** Update operators *)
68
+
type update_operator =
69
+
| Incr | Decr
70
+
71
+
(** Variable declaration kind *)
72
+
type var_kind =
73
+
| Var | Let | Const | Using | Await_using
74
+
75
+
(** Property kind *)
76
+
type property_kind =
77
+
| Init | Get | Set
78
+
79
+
(** Method kind *)
80
+
type method_kind =
81
+
| Method | Constructor | Get_method | Set_method
82
+
83
+
(** Class element type *)
84
+
type class_element_kind =
85
+
| Static_element
86
+
| Instance_element
87
+
| Private_element of { static : bool }
88
+
89
+
(** Expression *)
90
+
type expression = {
91
+
expr : expression_desc;
92
+
loc : loc;
93
+
}
94
+
95
+
and expression_desc =
96
+
| Identifier of identifier
97
+
| Private_identifier of string (* #name *)
98
+
| Literal of literal
99
+
| This
100
+
| Super
101
+
| Array of expression option list (* None = hole *)
102
+
| Object of property list
103
+
| Function of function_expression
104
+
| Arrow of arrow_function
105
+
| Class of class_expression
106
+
| Sequence of expression list
107
+
| Unary of { operator : unary_operator; argument : expression }
108
+
| Binary of { operator : binary_operator; left : expression; right : expression }
109
+
| Logical of { operator : logical_operator; left : expression; right : expression }
110
+
| Assignment of { operator : assignment_operator; left : pattern; right : expression }
111
+
| Update of { operator : update_operator; argument : expression; prefix : bool }
112
+
| Conditional of { test : expression; consequent : expression; alternate : expression }
113
+
| Call of { callee : expression; arguments : expression list; optional : bool }
114
+
| New of { callee : expression; arguments : expression list }
115
+
| Member of { object_ : expression; property : expression; computed : bool; optional : bool }
116
+
| TaggedTemplate of { tag : expression; quasi : template_literal }
117
+
| Template of template_literal
118
+
| Yield of { argument : expression option; delegate : bool }
119
+
| Await of expression
120
+
| Import of expression (* Dynamic import *)
121
+
| Meta_property of { meta : identifier; property : identifier }
122
+
| Spread of expression
123
+
| Paren of expression (* Preserved for source mapping *)
124
+
125
+
(** Template literal *)
126
+
and template_literal = {
127
+
quasis : template_element list;
128
+
expressions : expression list;
129
+
}
130
+
131
+
(** Object property *)
132
+
and property =
133
+
| Property of {
134
+
key : expression;
135
+
value : expression;
136
+
kind : property_kind;
137
+
shorthand : bool;
138
+
computed : bool;
139
+
method_ : bool;
140
+
}
141
+
| Spread_element of expression
142
+
143
+
(** Function expression *)
144
+
and function_expression = {
145
+
fn_id : identifier option;
146
+
fn_params : pattern list;
147
+
fn_body : function_body;
148
+
fn_generator : bool;
149
+
fn_async : bool;
150
+
}
151
+
152
+
(** Arrow function *)
153
+
and arrow_function = {
154
+
ar_params : pattern list;
155
+
ar_body : arrow_body;
156
+
ar_async : bool;
157
+
}
158
+
159
+
(** Arrow function body *)
160
+
and arrow_body =
161
+
| Arrow_expression of expression
162
+
| Arrow_block of function_body
163
+
164
+
(** Class expression *)
165
+
and class_expression = {
166
+
cls_id : identifier option;
167
+
cls_super : expression option;
168
+
cls_body : class_body;
169
+
}
170
+
171
+
(** Class body *)
172
+
and class_body = {
173
+
cls_elements : class_element list;
174
+
loc : loc;
175
+
}
176
+
177
+
(** Class element *)
178
+
and class_element =
179
+
| Method_definition of {
180
+
key : expression;
181
+
value : function_expression;
182
+
kind : method_kind;
183
+
static : bool;
184
+
computed : bool;
185
+
}
186
+
| Property_definition of {
187
+
key : expression;
188
+
value : expression option;
189
+
static : bool;
190
+
computed : bool;
191
+
}
192
+
| Static_block of statement list
193
+
194
+
(** Pattern (for destructuring and parameters) *)
195
+
and pattern = {
196
+
pat : pattern_desc;
197
+
loc : loc;
198
+
}
199
+
200
+
and pattern_desc =
201
+
| Pat_identifier of identifier
202
+
| Pat_array of array_pattern_element option list
203
+
| Pat_object of object_pattern_property list
204
+
| Pat_assignment of { left : pattern; right : expression }
205
+
| Pat_rest of pattern
206
+
| Pat_expression of expression (* For assignment targets *)
207
+
208
+
and array_pattern_element =
209
+
| Array_pat_element of pattern
210
+
| Array_pat_rest of pattern
211
+
212
+
and object_pattern_property =
213
+
| Object_pat_property of {
214
+
key : expression;
215
+
value : pattern;
216
+
shorthand : bool;
217
+
computed : bool;
218
+
}
219
+
| Object_pat_rest of pattern
220
+
221
+
(** Statement *)
222
+
and statement = {
223
+
stmt : statement_desc;
224
+
loc : loc;
225
+
}
226
+
227
+
and statement_desc =
228
+
| Empty
229
+
| Block of statement list
230
+
| Expression of expression
231
+
| If of { test : expression; consequent : statement; alternate : statement option }
232
+
| While of { test : expression; body : statement }
233
+
| Do_while of { body : statement; test : expression }
234
+
| For of {
235
+
init : for_init option;
236
+
test : expression option;
237
+
update : expression option;
238
+
body : statement;
239
+
}
240
+
| For_in of { left : for_in_left; right : expression; body : statement }
241
+
| For_of of { left : for_in_left; right : expression; body : statement; await : bool }
242
+
| Switch of { discriminant : expression; cases : switch_case list }
243
+
| Break of identifier option
244
+
| Continue of identifier option
245
+
| Return of expression option
246
+
| Throw of expression
247
+
| Try of {
248
+
block : statement; (* Always a Block *)
249
+
handler : catch_clause option;
250
+
finalizer : statement option; (* Always a Block if present *)
251
+
}
252
+
| With of { object_ : expression; body : statement }
253
+
| Labeled of { label : identifier; body : statement }
254
+
| Debugger
255
+
| Variable of var_declaration
256
+
| Function of function_declaration
257
+
| Class of class_declaration
258
+
259
+
(** For loop init *)
260
+
and for_init =
261
+
| For_init_var of var_declaration
262
+
| For_init_expr of expression
263
+
264
+
(** For-in/of left side *)
265
+
and for_in_left =
266
+
| For_in_var of var_declaration
267
+
| For_in_pat of pattern
268
+
269
+
(** Switch case *)
270
+
and switch_case = {
271
+
case_test : expression option; (* None for default *)
272
+
case_consequent : statement list;
273
+
case_loc : loc;
274
+
}
275
+
276
+
(** Catch clause *)
277
+
and catch_clause = {
278
+
catch_param : pattern option;
279
+
catch_body : statement; (* Always a Block *)
280
+
catch_loc : loc;
281
+
}
282
+
283
+
(** Variable declaration *)
284
+
and var_declaration = {
285
+
var_kind : var_kind;
286
+
var_declarations : var_declarator list;
287
+
var_loc : loc;
288
+
}
289
+
290
+
(** Variable declarator *)
291
+
and var_declarator = {
292
+
var_id : pattern;
293
+
var_init : expression option;
294
+
decl_loc : loc;
295
+
}
296
+
297
+
(** Function declaration *)
298
+
and function_declaration = {
299
+
fd_id : identifier; (* Required in declarations *)
300
+
fd_params : pattern list;
301
+
fd_body : function_body;
302
+
fd_generator : bool;
303
+
fd_async : bool;
304
+
fd_loc : loc;
305
+
}
306
+
307
+
(** Class declaration *)
308
+
and class_declaration = {
309
+
cd_id : identifier; (* Required in declarations *)
310
+
cd_super : expression option;
311
+
cd_body : class_body;
312
+
cd_loc : loc;
313
+
}
314
+
315
+
(** Function body *)
316
+
and function_body = {
317
+
body_directives : string list; (* "use strict", etc. *)
318
+
body_statements : statement list;
319
+
body_loc : loc;
320
+
}
321
+
322
+
(** Import/Export *)
323
+
type import_specifier =
324
+
| Import_default of identifier
325
+
| Import_namespace of identifier
326
+
| Import_named of { imported : identifier; local : identifier }
327
+
328
+
type export_specifier = {
329
+
exported : identifier;
330
+
local : identifier;
331
+
}
332
+
333
+
type module_declaration =
334
+
| Import of {
335
+
specifiers : import_specifier list;
336
+
source : string;
337
+
import_loc : loc;
338
+
}
339
+
| Export_named of {
340
+
specifiers : export_specifier list;
341
+
source : string option;
342
+
declaration : statement option;
343
+
export_loc : loc;
344
+
}
345
+
| Export_default of {
346
+
declaration : export_default;
347
+
export_loc : loc;
348
+
}
349
+
| Export_all of {
350
+
exported : identifier option;
351
+
source : string;
352
+
export_loc : loc;
353
+
}
354
+
355
+
and export_default =
356
+
| Export_function of function_declaration
357
+
| Export_class of class_declaration
358
+
| Export_expression of expression
359
+
360
+
(** Program (root node) *)
361
+
type program = {
362
+
source_type : source_type;
363
+
body : program_item list;
364
+
directives : string list;
365
+
program_loc : loc;
366
+
}
367
+
368
+
and source_type = Script | Module
369
+
370
+
and program_item =
371
+
| Stmt of statement
372
+
| Module_decl of module_declaration
373
+
374
+
(** Constructors for building AST nodes *)
375
+
376
+
let mk_ident ?(loc = dummy_loc) name = { name; loc }
377
+
378
+
let mk_expr ?(loc = dummy_loc) expr = { expr; loc }
379
+
380
+
let mk_stmt ?(loc = dummy_loc) stmt = { stmt; loc }
381
+
382
+
let mk_pat ?(loc = dummy_loc) pat = { pat; loc }
383
+
384
+
let ident name = Identifier (mk_ident name)
385
+
386
+
let lit_null = Literal Lit_null
387
+
let lit_bool b = Literal (Lit_bool b)
388
+
let lit_number n = Literal (Lit_number n)
389
+
let lit_string s = Literal (Lit_string s)
390
+
let lit_regexp ~pattern ~flags = Literal (Lit_regexp { pattern; flags })
391
+
392
+
let this = This
393
+
let super = Super
394
+
395
+
(** Pretty printing *)
396
+
397
+
let pp_identifier fmt { name; _ } = Format.fprintf fmt "%s" name
398
+
399
+
let pp_var_kind fmt = function
400
+
| Var -> Format.fprintf fmt "var"
401
+
| Let -> Format.fprintf fmt "let"
402
+
| Const -> Format.fprintf fmt "const"
403
+
| Using -> Format.fprintf fmt "using"
404
+
| Await_using -> Format.fprintf fmt "await using"
405
+
406
+
let pp_binary_operator fmt = function
407
+
| Eq -> Format.fprintf fmt "=="
408
+
| Neq -> Format.fprintf fmt "!="
409
+
| Strict_eq -> Format.fprintf fmt "==="
410
+
| Strict_neq -> Format.fprintf fmt "!=="
411
+
| Lt -> Format.fprintf fmt "<"
412
+
| Lte -> Format.fprintf fmt "<="
413
+
| Gt -> Format.fprintf fmt ">"
414
+
| Gte -> Format.fprintf fmt ">="
415
+
| Plus -> Format.fprintf fmt "+"
416
+
| Minus -> Format.fprintf fmt "-"
417
+
| Times -> Format.fprintf fmt "*"
418
+
| Div -> Format.fprintf fmt "/"
419
+
| Mod -> Format.fprintf fmt "%%"
420
+
| Exp -> Format.fprintf fmt "**"
421
+
| Bitor -> Format.fprintf fmt "|"
422
+
| Bitxor -> Format.fprintf fmt "^"
423
+
| Bitand -> Format.fprintf fmt "&"
424
+
| Lshift -> Format.fprintf fmt "<<"
425
+
| Rshift -> Format.fprintf fmt ">>"
426
+
| Urshift -> Format.fprintf fmt ">>>"
427
+
| In -> Format.fprintf fmt "in"
428
+
| Instanceof -> Format.fprintf fmt "instanceof"
429
+
430
+
let pp_unary_operator fmt = function
431
+
| Neg -> Format.fprintf fmt "-"
432
+
| Pos -> Format.fprintf fmt "+"
433
+
| Not -> Format.fprintf fmt "!"
434
+
| Bitnot -> Format.fprintf fmt "~"
435
+
| Typeof -> Format.fprintf fmt "typeof"
436
+
| Void -> Format.fprintf fmt "void"
437
+
| Delete -> Format.fprintf fmt "delete"
+363
lib/quickjs/parser/ast.mli
+363
lib/quickjs/parser/ast.mli
···
1
+
(** JavaScript Abstract Syntax Tree.
2
+
3
+
Based on ESTree specification but adapted for OCaml idioms.
4
+
All nodes include location information for error messages. *)
5
+
6
+
open Source
7
+
8
+
(** {1 Basic Types} *)
9
+
10
+
(** Identifier with location *)
11
+
type identifier = {
12
+
name : string;
13
+
loc : loc;
14
+
}
15
+
16
+
(** Literal values *)
17
+
type literal =
18
+
| Lit_null
19
+
| Lit_bool of bool
20
+
| Lit_number of float
21
+
| Lit_bigint of string
22
+
| Lit_string of string
23
+
| Lit_regexp of { pattern : string; flags : string }
24
+
25
+
(** Template literal part *)
26
+
type template_element = {
27
+
raw : string;
28
+
cooked : string option;
29
+
tail : bool;
30
+
}
31
+
32
+
(** {1 Operators} *)
33
+
34
+
type assignment_operator =
35
+
| Assign | Plus_assign | Minus_assign | Times_assign | Div_assign
36
+
| Mod_assign | Exp_assign | Lshift_assign | Rshift_assign | Urshift_assign
37
+
| Bitor_assign | Bitxor_assign | Bitand_assign
38
+
| Or_assign | And_assign | Nullish_assign
39
+
40
+
type binary_operator =
41
+
| Eq | Neq | Strict_eq | Strict_neq
42
+
| Lt | Lte | Gt | Gte
43
+
| Plus | Minus | Times | Div | Mod | Exp
44
+
| Bitor | Bitxor | Bitand
45
+
| Lshift | Rshift | Urshift
46
+
| In | Instanceof
47
+
48
+
type logical_operator =
49
+
| Or | And | Nullish
50
+
51
+
type unary_operator =
52
+
| Neg | Pos | Not | Bitnot
53
+
| Typeof | Void | Delete
54
+
55
+
type update_operator =
56
+
| Incr | Decr
57
+
58
+
(** {1 Declaration Kinds} *)
59
+
60
+
type var_kind = Var | Let | Const | Using | Await_using
61
+
62
+
type property_kind = Init | Get | Set
63
+
64
+
type method_kind = Method | Constructor | Get_method | Set_method
65
+
66
+
type class_element_kind =
67
+
| Static_element
68
+
| Instance_element
69
+
| Private_element of { static : bool }
70
+
71
+
(** {1 AST Node Types} *)
72
+
73
+
(** Expression *)
74
+
type expression = {
75
+
expr : expression_desc;
76
+
loc : loc;
77
+
}
78
+
79
+
and expression_desc =
80
+
| Identifier of identifier
81
+
| Private_identifier of string
82
+
| Literal of literal
83
+
| This
84
+
| Super
85
+
| Array of expression option list
86
+
| Object of property list
87
+
| Function of function_expression
88
+
| Arrow of arrow_function
89
+
| Class of class_expression
90
+
| Sequence of expression list
91
+
| Unary of { operator : unary_operator; argument : expression }
92
+
| Binary of { operator : binary_operator; left : expression; right : expression }
93
+
| Logical of { operator : logical_operator; left : expression; right : expression }
94
+
| Assignment of { operator : assignment_operator; left : pattern; right : expression }
95
+
| Update of { operator : update_operator; argument : expression; prefix : bool }
96
+
| Conditional of { test : expression; consequent : expression; alternate : expression }
97
+
| Call of { callee : expression; arguments : expression list; optional : bool }
98
+
| New of { callee : expression; arguments : expression list }
99
+
| Member of { object_ : expression; property : expression; computed : bool; optional : bool }
100
+
| TaggedTemplate of { tag : expression; quasi : template_literal }
101
+
| Template of template_literal
102
+
| Yield of { argument : expression option; delegate : bool }
103
+
| Await of expression
104
+
| Import of expression
105
+
| Meta_property of { meta : identifier; property : identifier }
106
+
| Spread of expression
107
+
| Paren of expression
108
+
109
+
and template_literal = {
110
+
quasis : template_element list;
111
+
expressions : expression list;
112
+
}
113
+
114
+
and property =
115
+
| Property of {
116
+
key : expression;
117
+
value : expression;
118
+
kind : property_kind;
119
+
shorthand : bool;
120
+
computed : bool;
121
+
method_ : bool;
122
+
}
123
+
| Spread_element of expression
124
+
125
+
and function_expression = {
126
+
fn_id : identifier option;
127
+
fn_params : pattern list;
128
+
fn_body : function_body;
129
+
fn_generator : bool;
130
+
fn_async : bool;
131
+
}
132
+
133
+
and arrow_function = {
134
+
ar_params : pattern list;
135
+
ar_body : arrow_body;
136
+
ar_async : bool;
137
+
}
138
+
139
+
and arrow_body =
140
+
| Arrow_expression of expression
141
+
| Arrow_block of function_body
142
+
143
+
and class_expression = {
144
+
cls_id : identifier option;
145
+
cls_super : expression option;
146
+
cls_body : class_body;
147
+
}
148
+
149
+
and class_body = {
150
+
cls_elements : class_element list;
151
+
loc : loc;
152
+
}
153
+
154
+
and class_element =
155
+
| Method_definition of {
156
+
key : expression;
157
+
value : function_expression;
158
+
kind : method_kind;
159
+
static : bool;
160
+
computed : bool;
161
+
}
162
+
| Property_definition of {
163
+
key : expression;
164
+
value : expression option;
165
+
static : bool;
166
+
computed : bool;
167
+
}
168
+
| Static_block of statement list
169
+
170
+
(** Pattern *)
171
+
and pattern = {
172
+
pat : pattern_desc;
173
+
loc : loc;
174
+
}
175
+
176
+
and pattern_desc =
177
+
| Pat_identifier of identifier
178
+
| Pat_array of array_pattern_element option list
179
+
| Pat_object of object_pattern_property list
180
+
| Pat_assignment of { left : pattern; right : expression }
181
+
| Pat_rest of pattern
182
+
| Pat_expression of expression
183
+
184
+
and array_pattern_element =
185
+
| Array_pat_element of pattern
186
+
| Array_pat_rest of pattern
187
+
188
+
and object_pattern_property =
189
+
| Object_pat_property of {
190
+
key : expression;
191
+
value : pattern;
192
+
shorthand : bool;
193
+
computed : bool;
194
+
}
195
+
| Object_pat_rest of pattern
196
+
197
+
(** Statement *)
198
+
and statement = {
199
+
stmt : statement_desc;
200
+
loc : loc;
201
+
}
202
+
203
+
and statement_desc =
204
+
| Empty
205
+
| Block of statement list
206
+
| Expression of expression
207
+
| If of { test : expression; consequent : statement; alternate : statement option }
208
+
| While of { test : expression; body : statement }
209
+
| Do_while of { body : statement; test : expression }
210
+
| For of {
211
+
init : for_init option;
212
+
test : expression option;
213
+
update : expression option;
214
+
body : statement;
215
+
}
216
+
| For_in of { left : for_in_left; right : expression; body : statement }
217
+
| For_of of { left : for_in_left; right : expression; body : statement; await : bool }
218
+
| Switch of { discriminant : expression; cases : switch_case list }
219
+
| Break of identifier option
220
+
| Continue of identifier option
221
+
| Return of expression option
222
+
| Throw of expression
223
+
| Try of {
224
+
block : statement;
225
+
handler : catch_clause option;
226
+
finalizer : statement option;
227
+
}
228
+
| With of { object_ : expression; body : statement }
229
+
| Labeled of { label : identifier; body : statement }
230
+
| Debugger
231
+
| Variable of var_declaration
232
+
| Function of function_declaration
233
+
| Class of class_declaration
234
+
235
+
and for_init =
236
+
| For_init_var of var_declaration
237
+
| For_init_expr of expression
238
+
239
+
and for_in_left =
240
+
| For_in_var of var_declaration
241
+
| For_in_pat of pattern
242
+
243
+
and switch_case = {
244
+
case_test : expression option;
245
+
case_consequent : statement list;
246
+
case_loc : loc;
247
+
}
248
+
249
+
and catch_clause = {
250
+
catch_param : pattern option;
251
+
catch_body : statement;
252
+
catch_loc : loc;
253
+
}
254
+
255
+
and var_declaration = {
256
+
var_kind : var_kind;
257
+
var_declarations : var_declarator list;
258
+
var_loc : loc;
259
+
}
260
+
261
+
and var_declarator = {
262
+
var_id : pattern;
263
+
var_init : expression option;
264
+
decl_loc : loc;
265
+
}
266
+
267
+
and function_declaration = {
268
+
fd_id : identifier;
269
+
fd_params : pattern list;
270
+
fd_body : function_body;
271
+
fd_generator : bool;
272
+
fd_async : bool;
273
+
fd_loc : loc;
274
+
}
275
+
276
+
and class_declaration = {
277
+
cd_id : identifier;
278
+
cd_super : expression option;
279
+
cd_body : class_body;
280
+
cd_loc : loc;
281
+
}
282
+
283
+
and function_body = {
284
+
body_directives : string list;
285
+
body_statements : statement list;
286
+
body_loc : loc;
287
+
}
288
+
289
+
(** {1 Module System} *)
290
+
291
+
type import_specifier =
292
+
| Import_default of identifier
293
+
| Import_namespace of identifier
294
+
| Import_named of { imported : identifier; local : identifier }
295
+
296
+
type export_specifier = {
297
+
exported : identifier;
298
+
local : identifier;
299
+
}
300
+
301
+
type module_declaration =
302
+
| Import of {
303
+
specifiers : import_specifier list;
304
+
source : string;
305
+
import_loc : loc;
306
+
}
307
+
| Export_named of {
308
+
specifiers : export_specifier list;
309
+
source : string option;
310
+
declaration : statement option;
311
+
export_loc : loc;
312
+
}
313
+
| Export_default of {
314
+
declaration : export_default;
315
+
export_loc : loc;
316
+
}
317
+
| Export_all of {
318
+
exported : identifier option;
319
+
source : string;
320
+
export_loc : loc;
321
+
}
322
+
323
+
and export_default =
324
+
| Export_function of function_declaration
325
+
| Export_class of class_declaration
326
+
| Export_expression of expression
327
+
328
+
(** Program (root node) *)
329
+
type program = {
330
+
source_type : source_type;
331
+
body : program_item list;
332
+
directives : string list;
333
+
program_loc : loc;
334
+
}
335
+
336
+
and source_type = Script | Module
337
+
338
+
and program_item =
339
+
| Stmt of statement
340
+
| Module_decl of module_declaration
341
+
342
+
(** {1 Constructors} *)
343
+
344
+
val mk_ident : ?loc:loc -> string -> identifier
345
+
val mk_expr : ?loc:loc -> expression_desc -> expression
346
+
val mk_stmt : ?loc:loc -> statement_desc -> statement
347
+
val mk_pat : ?loc:loc -> pattern_desc -> pattern
348
+
349
+
val ident : string -> expression_desc
350
+
val lit_null : expression_desc
351
+
val lit_bool : bool -> expression_desc
352
+
val lit_number : float -> expression_desc
353
+
val lit_string : string -> expression_desc
354
+
val lit_regexp : pattern:string -> flags:string -> expression_desc
355
+
val this : expression_desc
356
+
val super : expression_desc
357
+
358
+
(** {1 Pretty Printing} *)
359
+
360
+
val pp_identifier : Format.formatter -> identifier -> unit
361
+
val pp_var_kind : Format.formatter -> var_kind -> unit
362
+
val pp_binary_operator : Format.formatter -> binary_operator -> unit
363
+
val pp_unary_operator : Format.formatter -> unary_operator -> unit
+214
-13
lib/quickjs/parser/lexer.ml
+214
-13
lib/quickjs/parser/lexer.ml
···
40
40
let set_strict_mode lexer strict =
41
41
lexer.strict_mode <- strict
42
42
43
+
(* State for save/restore *)
44
+
type state = {
45
+
cursor_state : Source.cursor_state;
46
+
strict_mode : bool;
47
+
allow_regexp : bool;
48
+
newline_before : bool;
49
+
}
50
+
51
+
let save lexer = {
52
+
cursor_state = Source.cursor_save lexer.cursor;
53
+
strict_mode = lexer.strict_mode;
54
+
allow_regexp = lexer.allow_regexp;
55
+
newline_before = lexer.newline_before;
56
+
}
57
+
58
+
let restore lexer state =
59
+
Source.cursor_restore lexer.cursor state.cursor_state;
60
+
lexer.strict_mode <- state.strict_mode;
61
+
lexer.allow_regexp <- state.allow_regexp;
62
+
lexer.newline_before <- state.newline_before
63
+
43
64
let error lexer err =
44
65
let loc = Source.cursor_loc lexer.cursor in
45
66
raise (Lexer_error (err, loc))
···
278
299
| Some c when is_octal_digit c ->
279
300
scan_legacy_octal_number lexer
280
301
| Some '.' ->
302
+
Source.cursor_advance cursor; (* consume the '.' *)
281
303
scan_decimal_fraction lexer
282
304
| Some ('e' | 'E') ->
283
305
scan_decimal_exponent lexer
···
485
507
(* \uXXXX *)
486
508
scan_hex_escape lexer 4
487
509
488
-
(* Scan identifier *)
510
+
(* Scan identifier, handling Unicode escapes *)
489
511
let scan_identifier lexer =
490
512
let cursor = lexer.cursor in
491
-
Source.cursor_mark cursor;
492
-
Source.cursor_skip_while cursor is_identifier_continue;
493
-
let s = Source.cursor_slice cursor in
494
-
(* Check for keyword *)
495
-
match Token.keyword_of_string s with
496
-
| Some kw -> Token.Keyword kw
497
-
| None -> Token.Identifier s
513
+
let buf = Buffer.create 16 in
514
+
let has_escape = ref false in
515
+
let rec loop () =
516
+
match Source.cursor_peek cursor with
517
+
| Some c when is_identifier_continue c ->
518
+
Source.cursor_advance cursor;
519
+
Buffer.add_char buf c;
520
+
loop ()
521
+
| Some '\\' ->
522
+
(* Unicode escape in identifier *)
523
+
Source.cursor_advance cursor;
524
+
(match Source.cursor_peek cursor with
525
+
| Some 'u' ->
526
+
Source.cursor_advance cursor;
527
+
has_escape := true;
528
+
(match Source.cursor_peek cursor with
529
+
| Some '{' ->
530
+
(* \u{XXXX} form *)
531
+
Source.cursor_advance cursor;
532
+
let value = ref 0 in
533
+
let rec scan_hex () =
534
+
match Source.cursor_peek cursor with
535
+
| Some '}' -> Source.cursor_advance cursor
536
+
| Some c when is_hex_digit c ->
537
+
Source.cursor_advance cursor;
538
+
value := !value * 16 + hex_value c;
539
+
scan_hex ()
540
+
| _ -> error lexer (Invalid_unicode_escape "incomplete")
541
+
in
542
+
scan_hex ();
543
+
(* Convert code point to character(s) *)
544
+
if !value <= 0x7F then
545
+
Buffer.add_char buf (Char.chr !value)
546
+
else if !value <= 0x7FF then begin
547
+
Buffer.add_char buf (Char.chr (0xC0 lor (!value lsr 6)));
548
+
Buffer.add_char buf (Char.chr (0x80 lor (!value land 0x3F)))
549
+
end else if !value <= 0xFFFF then begin
550
+
Buffer.add_char buf (Char.chr (0xE0 lor (!value lsr 12)));
551
+
Buffer.add_char buf (Char.chr (0x80 lor ((!value lsr 6) land 0x3F)));
552
+
Buffer.add_char buf (Char.chr (0x80 lor (!value land 0x3F)))
553
+
end else begin
554
+
Buffer.add_char buf (Char.chr (0xF0 lor (!value lsr 18)));
555
+
Buffer.add_char buf (Char.chr (0x80 lor ((!value lsr 12) land 0x3F)));
556
+
Buffer.add_char buf (Char.chr (0x80 lor ((!value lsr 6) land 0x3F)));
557
+
Buffer.add_char buf (Char.chr (0x80 lor (!value land 0x3F)))
558
+
end;
559
+
loop ()
560
+
| _ ->
561
+
(* \uXXXX form *)
562
+
let d1 = match Source.cursor_peek cursor with
563
+
| Some c when is_hex_digit c -> Source.cursor_advance cursor; hex_value c
564
+
| _ -> error lexer (Invalid_unicode_escape "expected hex digit")
565
+
in
566
+
let d2 = match Source.cursor_peek cursor with
567
+
| Some c when is_hex_digit c -> Source.cursor_advance cursor; hex_value c
568
+
| _ -> error lexer (Invalid_unicode_escape "expected hex digit")
569
+
in
570
+
let d3 = match Source.cursor_peek cursor with
571
+
| Some c when is_hex_digit c -> Source.cursor_advance cursor; hex_value c
572
+
| _ -> error lexer (Invalid_unicode_escape "expected hex digit")
573
+
in
574
+
let d4 = match Source.cursor_peek cursor with
575
+
| Some c when is_hex_digit c -> Source.cursor_advance cursor; hex_value c
576
+
| _ -> error lexer (Invalid_unicode_escape "expected hex digit")
577
+
in
578
+
let value = (d1 lsl 12) lor (d2 lsl 8) lor (d3 lsl 4) lor d4 in
579
+
if value <= 0x7F then
580
+
Buffer.add_char buf (Char.chr value)
581
+
else if value <= 0x7FF then begin
582
+
Buffer.add_char buf (Char.chr (0xC0 lor (value lsr 6)));
583
+
Buffer.add_char buf (Char.chr (0x80 lor (value land 0x3F)))
584
+
end else begin
585
+
Buffer.add_char buf (Char.chr (0xE0 lor (value lsr 12)));
586
+
Buffer.add_char buf (Char.chr (0x80 lor ((value lsr 6) land 0x3F)));
587
+
Buffer.add_char buf (Char.chr (0x80 lor (value land 0x3F)))
588
+
end;
589
+
loop ())
590
+
| _ -> error lexer (Invalid_escape_sequence "\\"))
591
+
| _ -> ()
592
+
in
593
+
loop ();
594
+
let s = Buffer.contents buf in
595
+
(* Keywords can only be recognized if there's no escape *)
596
+
if not !has_escape then
597
+
match Token.keyword_of_string s with
598
+
| Some kw -> Token.Keyword kw
599
+
| None -> Token.Identifier s
600
+
else
601
+
Token.Identifier s
498
602
499
603
(* Scan template literal *)
500
604
let scan_template lexer ~is_head =
···
607
711
scan_flags ();
608
712
Token.Regexp (p, Buffer.contents flags)
609
713
714
+
(* Scan identifier content - shared by scan_identifier and scan_private_identifier *)
715
+
let scan_identifier_content lexer =
716
+
let cursor = lexer.cursor in
717
+
let buf = Buffer.create 16 in
718
+
let rec loop () =
719
+
match Source.cursor_peek cursor with
720
+
| Some c when is_identifier_continue c ->
721
+
Source.cursor_advance cursor;
722
+
Buffer.add_char buf c;
723
+
loop ()
724
+
| Some '\\' ->
725
+
(* Unicode escape in identifier *)
726
+
Source.cursor_advance cursor;
727
+
(match Source.cursor_peek cursor with
728
+
| Some 'u' ->
729
+
Source.cursor_advance cursor;
730
+
(match Source.cursor_peek cursor with
731
+
| Some '{' ->
732
+
(* \u{XXXX} form *)
733
+
Source.cursor_advance cursor;
734
+
let value = ref 0 in
735
+
let rec scan_hex () =
736
+
match Source.cursor_peek cursor with
737
+
| Some '}' -> Source.cursor_advance cursor
738
+
| Some c when is_hex_digit c ->
739
+
Source.cursor_advance cursor;
740
+
value := !value * 16 + hex_value c;
741
+
scan_hex ()
742
+
| _ -> error lexer (Invalid_unicode_escape "incomplete")
743
+
in
744
+
scan_hex ();
745
+
(* Convert code point to character(s) *)
746
+
if !value <= 0x7F then
747
+
Buffer.add_char buf (Char.chr !value)
748
+
else if !value <= 0x7FF then begin
749
+
Buffer.add_char buf (Char.chr (0xC0 lor (!value lsr 6)));
750
+
Buffer.add_char buf (Char.chr (0x80 lor (!value land 0x3F)))
751
+
end else if !value <= 0xFFFF then begin
752
+
Buffer.add_char buf (Char.chr (0xE0 lor (!value lsr 12)));
753
+
Buffer.add_char buf (Char.chr (0x80 lor ((!value lsr 6) land 0x3F)));
754
+
Buffer.add_char buf (Char.chr (0x80 lor (!value land 0x3F)))
755
+
end else begin
756
+
Buffer.add_char buf (Char.chr (0xF0 lor (!value lsr 18)));
757
+
Buffer.add_char buf (Char.chr (0x80 lor ((!value lsr 12) land 0x3F)));
758
+
Buffer.add_char buf (Char.chr (0x80 lor ((!value lsr 6) land 0x3F)));
759
+
Buffer.add_char buf (Char.chr (0x80 lor (!value land 0x3F)))
760
+
end;
761
+
loop ()
762
+
| _ ->
763
+
(* \uXXXX form *)
764
+
let d1 = match Source.cursor_peek cursor with
765
+
| Some c when is_hex_digit c -> Source.cursor_advance cursor; hex_value c
766
+
| _ -> error lexer (Invalid_unicode_escape "expected hex digit")
767
+
in
768
+
let d2 = match Source.cursor_peek cursor with
769
+
| Some c when is_hex_digit c -> Source.cursor_advance cursor; hex_value c
770
+
| _ -> error lexer (Invalid_unicode_escape "expected hex digit")
771
+
in
772
+
let d3 = match Source.cursor_peek cursor with
773
+
| Some c when is_hex_digit c -> Source.cursor_advance cursor; hex_value c
774
+
| _ -> error lexer (Invalid_unicode_escape "expected hex digit")
775
+
in
776
+
let d4 = match Source.cursor_peek cursor with
777
+
| Some c when is_hex_digit c -> Source.cursor_advance cursor; hex_value c
778
+
| _ -> error lexer (Invalid_unicode_escape "expected hex digit")
779
+
in
780
+
let value = (d1 lsl 12) lor (d2 lsl 8) lor (d3 lsl 4) lor d4 in
781
+
if value <= 0x7F then
782
+
Buffer.add_char buf (Char.chr value)
783
+
else if value <= 0x7FF then begin
784
+
Buffer.add_char buf (Char.chr (0xC0 lor (value lsr 6)));
785
+
Buffer.add_char buf (Char.chr (0x80 lor (value land 0x3F)))
786
+
end else begin
787
+
Buffer.add_char buf (Char.chr (0xE0 lor (value lsr 12)));
788
+
Buffer.add_char buf (Char.chr (0x80 lor ((value lsr 6) land 0x3F)));
789
+
Buffer.add_char buf (Char.chr (0x80 lor (value land 0x3F)))
790
+
end;
791
+
loop ())
792
+
| _ -> error lexer (Invalid_escape_sequence "\\"))
793
+
| _ -> ()
794
+
in
795
+
loop ();
796
+
Buffer.contents buf
797
+
610
798
(* Scan private identifier (#name) *)
611
799
let scan_private_identifier lexer =
612
800
let cursor = lexer.cursor in
613
801
Source.cursor_advance cursor; (* Skip '#' *)
614
-
Source.cursor_mark cursor;
615
-
Source.cursor_skip_while cursor is_identifier_continue;
616
-
let s = Source.cursor_slice cursor in
802
+
let s = scan_identifier_content lexer in
617
803
Token.Private_identifier s
618
804
619
805
(* Main lexer function *)
···
809
995
Token.Question_dot)
810
996
| _ -> Token.Question)
811
997
998
+
(* Unicode escape at identifier start *)
999
+
| '\\' ->
1000
+
(match Source.cursor_peek_n cursor 2 with
1001
+
| Some s when String.length s >= 2 && s.[1] = 'u' ->
1002
+
scan_identifier lexer
1003
+
| _ ->
1004
+
Source.cursor_advance cursor;
1005
+
error lexer (Unexpected_char c))
1006
+
812
1007
| _ ->
813
1008
Source.cursor_advance cursor;
814
1009
error lexer (Unexpected_char c)
···
831
1026
{ Token.tok; loc; preceded_by_newline = lexer.newline_before }
832
1027
833
1028
(* Continue scanning template after expression *)
834
-
let scan_template_tail lexer =
835
-
scan_template lexer ~is_head:false
1029
+
let scan_template_tail lexer : Token.token =
1030
+
let cursor = lexer.cursor in
1031
+
Source.cursor_mark cursor;
1032
+
let start_pos = Source.cursor_pos cursor in
1033
+
let tok = scan_template lexer ~is_head:false in
1034
+
let end_pos = Source.cursor_pos cursor in
1035
+
let loc = Source.mk_loc ~start:start_pos ~end_:end_pos () in
1036
+
{ Token.tok; loc; preceded_by_newline = lexer.newline_before }
836
1037
837
1038
(* Peek at next token without consuming *)
838
1039
let peek lexer =
+10
-1
lib/quickjs/parser/lexer.mli
+10
-1
lib/quickjs/parser/lexer.mli
···
30
30
val peek : t -> Token.token
31
31
32
32
(** Continue scanning template literal after expression *)
33
-
val scan_template_tail : t -> Token.t
33
+
val scan_template_tail : t -> Token.token
34
+
35
+
(** Lexer state for save/restore (for lookahead parsing) *)
36
+
type state
37
+
38
+
(** Save current lexer state *)
39
+
val save : t -> state
40
+
41
+
(** Restore lexer to a previously saved state *)
42
+
val restore : t -> state -> unit
34
43
35
44
(** Error formatting *)
36
45
val pp_error : Format.formatter -> error -> unit
+2346
lib/quickjs/parser/parser.ml
+2346
lib/quickjs/parser/parser.ml
···
1
+
(** JavaScript Parser.
2
+
3
+
A recursive-descent parser for ECMAScript 2024.
4
+
Produces an AST from token stream. *)
5
+
6
+
type error =
7
+
| Unexpected_token of Token.t
8
+
| Expected_token of string * Token.t
9
+
| Expected_identifier
10
+
| Expected_expression
11
+
| Expected_statement
12
+
| Invalid_assignment_target
13
+
| Duplicate_label of string
14
+
| Illegal_break
15
+
| Illegal_continue
16
+
| Illegal_return
17
+
| Strict_mode_with
18
+
| Strict_mode_octal
19
+
| Invalid_destructuring
20
+
21
+
exception Parse_error of error * Source.loc
22
+
23
+
type t = {
24
+
lexer : Lexer.t;
25
+
mutable current : Token.token;
26
+
mutable strict_mode : bool;
27
+
mutable in_function : bool;
28
+
mutable in_generator : bool;
29
+
mutable in_async : bool;
30
+
mutable in_iteration : bool;
31
+
mutable in_switch : bool;
32
+
mutable allow_in : bool; (* Allow 'in' as binary operator *)
33
+
mutable labels : string list;
34
+
}
35
+
36
+
let create lexer =
37
+
let current = Lexer.next_token lexer in
38
+
{
39
+
lexer;
40
+
current;
41
+
strict_mode = false;
42
+
in_function = false;
43
+
in_generator = false;
44
+
in_async = false;
45
+
in_iteration = false;
46
+
in_switch = false;
47
+
allow_in = true; (* Default: allow 'in' as binary operator *)
48
+
labels = [];
49
+
}
50
+
51
+
let error parser err =
52
+
raise (Parse_error (err, parser.current.loc))
53
+
54
+
let current_token parser = parser.current.tok
55
+
56
+
let current_loc parser = parser.current.loc
57
+
58
+
let advance parser =
59
+
parser.current <- Lexer.next_token parser.lexer
60
+
61
+
let expect parser expected =
62
+
if current_token parser = expected then
63
+
advance parser
64
+
else
65
+
error parser (Expected_token (Token.show expected, current_token parser))
66
+
67
+
let expect_semicolon parser =
68
+
match current_token parser with
69
+
| Token.Semicolon -> advance parser
70
+
| Token.RBrace | Token.Eof -> () (* ASI *)
71
+
| _ when parser.current.preceded_by_newline -> () (* ASI *)
72
+
| _ -> error parser (Expected_token (";", current_token parser))
73
+
74
+
let is_at_end parser =
75
+
current_token parser = Token.Eof
76
+
77
+
(** Helper to check if current token is the 'async' contextual keyword *)
78
+
let is_async_keyword parser =
79
+
match current_token parser with
80
+
| Token.Identifier "async" -> true
81
+
| _ -> false
82
+
83
+
(** Check if current token can start an expression *)
84
+
let can_start_expression parser =
85
+
match current_token parser with
86
+
| Token.Identifier _ | Token.Private_identifier _ | Token.Number _ | Token.BigInt _
87
+
| Token.String _ | Token.Regexp _
88
+
| Token.Template _ | Token.LParen | Token.LBracket | Token.LBrace
89
+
| Token.Keyword Token.Kw_function | Token.Keyword Token.Kw_class
90
+
| Token.Keyword Token.Kw_this | Token.Keyword Token.Kw_super
91
+
| Token.Keyword Token.Kw_true | Token.Keyword Token.Kw_false
92
+
| Token.Keyword Token.Kw_null | Token.Keyword Token.Kw_new
93
+
| Token.Keyword Token.Kw_typeof | Token.Keyword Token.Kw_void
94
+
| Token.Keyword Token.Kw_delete | Token.Keyword Token.Kw_yield
95
+
| Token.Keyword Token.Kw_await | Token.Keyword Token.Kw_import
96
+
| Token.Plus | Token.Minus | Token.Bang | Token.Tilde
97
+
| Token.Plus_plus | Token.Minus_minus
98
+
-> true
99
+
| _ -> false
100
+
101
+
(** Check if a keyword can be used as identifier in current context *)
102
+
let is_strict_reserved kw =
103
+
match kw with
104
+
| Token.Kw_implements | Token.Kw_interface | Token.Kw_package
105
+
| Token.Kw_private | Token.Kw_protected | Token.Kw_public
106
+
| Token.Kw_static -> true
107
+
| _ -> false
108
+
109
+
(** Check if a keyword is a contextual keyword (always usable as identifier) *)
110
+
let is_contextual_keyword kw =
111
+
match kw with
112
+
| Token.Kw_as | Token.Kw_async | Token.Kw_from | Token.Kw_get
113
+
| Token.Kw_meta | Token.Kw_of | Token.Kw_set | Token.Kw_target
114
+
| Token.Kw_accessor -> true
115
+
| _ -> false
116
+
117
+
(** Parse an identifier *)
118
+
let parse_identifier parser =
119
+
match current_token parser with
120
+
| Token.Identifier name ->
121
+
let loc = current_loc parser in
122
+
advance parser;
123
+
{ Ast.name; loc }
124
+
(* 'await' can be identifier when not in async function and not in module (strict mode) *)
125
+
| Token.Keyword Token.Kw_await when not parser.in_async && not parser.strict_mode ->
126
+
let loc = current_loc parser in
127
+
advance parser;
128
+
{ Ast.name = "await"; loc }
129
+
(* 'yield' can be identifier when not in generator and not in strict mode *)
130
+
| Token.Keyword Token.Kw_yield when not parser.in_generator && not parser.strict_mode ->
131
+
let loc = current_loc parser in
132
+
advance parser;
133
+
{ Ast.name = "yield"; loc }
134
+
(* Strict mode reserved words can be identifiers in non-strict mode *)
135
+
| Token.Keyword kw when not parser.strict_mode && is_strict_reserved kw ->
136
+
let name = Token.keyword_to_string kw in
137
+
let loc = current_loc parser in
138
+
advance parser;
139
+
{ Ast.name; loc }
140
+
(* Contextual keywords are always usable as identifiers *)
141
+
| Token.Keyword kw when is_contextual_keyword kw ->
142
+
let name = Token.keyword_to_string kw in
143
+
let loc = current_loc parser in
144
+
advance parser;
145
+
{ Ast.name; loc }
146
+
| _ -> error parser Expected_identifier
147
+
148
+
(** Parse a literal *)
149
+
let parse_literal parser =
150
+
let loc = current_loc parser in
151
+
let lit = match current_token parser with
152
+
| Token.Keyword Token.Kw_null -> Ast.Lit_null
153
+
| Token.Keyword Token.Kw_true -> Ast.Lit_bool true
154
+
| Token.Keyword Token.Kw_false -> Ast.Lit_bool false
155
+
| Token.Number (n, _) -> Ast.Lit_number n
156
+
| Token.BigInt s -> Ast.Lit_bigint s
157
+
| Token.String (s, _) -> Ast.Lit_string s
158
+
| Token.Regexp (pattern, flags) -> Ast.Lit_regexp { pattern; flags }
159
+
| _ -> error parser Expected_expression
160
+
in
161
+
advance parser;
162
+
Ast.mk_expr ~loc (Ast.Literal lit)
163
+
164
+
(** All mutually recursive parser functions *)
165
+
166
+
let rec parse_binding_pattern parser : Ast.pattern =
167
+
let start_loc = current_loc parser in
168
+
match current_token parser with
169
+
| Token.LBracket ->
170
+
advance parser;
171
+
let elements = ref [] in
172
+
while current_token parser <> Token.RBracket && not (is_at_end parser) do
173
+
if current_token parser = Token.Comma then begin
174
+
elements := None :: !elements;
175
+
advance parser
176
+
end else if current_token parser = Token.Ellipsis then begin
177
+
advance parser;
178
+
let pat = parse_binding_pattern parser in
179
+
elements := Some (Ast.Array_pat_rest pat) :: !elements
180
+
end else begin
181
+
let pat = parse_binding_pattern parser in
182
+
let pat =
183
+
if current_token parser = Token.Eq then begin
184
+
advance parser;
185
+
let default = parse_assignment_expression parser in
186
+
Ast.mk_pat ~loc:pat.loc (Ast.Pat_assignment { left = pat; right = default })
187
+
end else pat
188
+
in
189
+
elements := Some (Ast.Array_pat_element pat) :: !elements;
190
+
if current_token parser <> Token.RBracket then
191
+
expect parser Token.Comma
192
+
end
193
+
done;
194
+
let end_loc = current_loc parser in
195
+
expect parser Token.RBracket;
196
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
197
+
Ast.mk_pat ~loc (Ast.Pat_array (List.rev !elements))
198
+
199
+
| Token.LBrace ->
200
+
advance parser;
201
+
let props = ref [] in
202
+
while current_token parser <> Token.RBrace && not (is_at_end parser) do
203
+
if current_token parser = Token.Ellipsis then begin
204
+
advance parser;
205
+
let id = parse_identifier parser in
206
+
props := Ast.Object_pat_rest (Ast.mk_pat ~loc:id.loc (Ast.Pat_identifier id)) :: !props
207
+
end else begin
208
+
let computed = current_token parser = Token.LBracket in
209
+
let key =
210
+
if computed then begin
211
+
advance parser;
212
+
let k = parse_assignment_expression parser in
213
+
expect parser Token.RBracket;
214
+
k
215
+
end else begin
216
+
match current_token parser with
217
+
| Token.Identifier name ->
218
+
let loc = current_loc parser in
219
+
advance parser;
220
+
Ast.mk_expr ~loc (Ast.Literal (Ast.Lit_string name))
221
+
| Token.Number (n, _) ->
222
+
let loc = current_loc parser in
223
+
advance parser;
224
+
Ast.mk_expr ~loc (Ast.Literal (Ast.Lit_number n))
225
+
| Token.String (s, _) ->
226
+
let loc = current_loc parser in
227
+
advance parser;
228
+
Ast.mk_expr ~loc (Ast.Literal (Ast.Lit_string s))
229
+
| _ -> error parser Expected_identifier
230
+
end
231
+
in
232
+
let (value, shorthand) =
233
+
if current_token parser = Token.Colon then begin
234
+
advance parser;
235
+
(parse_binding_pattern parser, false)
236
+
end else begin
237
+
match key.expr with
238
+
| Ast.Literal (Ast.Lit_string name) ->
239
+
let id = { Ast.name; loc = key.loc } in
240
+
(Ast.mk_pat ~loc:key.loc (Ast.Pat_identifier id), true)
241
+
| _ -> error parser Expected_identifier
242
+
end
243
+
in
244
+
let value =
245
+
if current_token parser = Token.Eq then begin
246
+
advance parser;
247
+
let default = parse_assignment_expression parser in
248
+
Ast.mk_pat ~loc:value.loc (Ast.Pat_assignment { left = value; right = default })
249
+
end else value
250
+
in
251
+
props := Ast.Object_pat_property { key; value; shorthand; computed } :: !props
252
+
end;
253
+
if current_token parser <> Token.RBrace then
254
+
expect parser Token.Comma
255
+
done;
256
+
let end_loc = current_loc parser in
257
+
expect parser Token.RBrace;
258
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
259
+
Ast.mk_pat ~loc (Ast.Pat_object (List.rev !props))
260
+
261
+
| Token.Identifier name ->
262
+
let loc = current_loc parser in
263
+
advance parser;
264
+
Ast.mk_pat ~loc (Ast.Pat_identifier { Ast.name; loc })
265
+
266
+
(* Strict mode reserved words can be identifiers in non-strict mode *)
267
+
| Token.Keyword kw when not parser.strict_mode && is_strict_reserved kw ->
268
+
let name = Token.keyword_to_string kw in
269
+
let loc = current_loc parser in
270
+
advance parser;
271
+
Ast.mk_pat ~loc (Ast.Pat_identifier { Ast.name; loc })
272
+
273
+
(* 'await' can be identifier when not in async function and not in module *)
274
+
| Token.Keyword Token.Kw_await when not parser.in_async && not parser.strict_mode ->
275
+
let loc = current_loc parser in
276
+
advance parser;
277
+
Ast.mk_pat ~loc (Ast.Pat_identifier { Ast.name = "await"; loc })
278
+
279
+
(* 'yield' can be identifier when not in generator and not in strict mode *)
280
+
| Token.Keyword Token.Kw_yield when not parser.in_generator && not parser.strict_mode ->
281
+
let loc = current_loc parser in
282
+
advance parser;
283
+
Ast.mk_pat ~loc (Ast.Pat_identifier { Ast.name = "yield"; loc })
284
+
285
+
| _ -> error parser Expected_identifier
286
+
287
+
and parse_function_params parser : Ast.pattern list =
288
+
let params = ref [] in
289
+
while current_token parser <> Token.RParen && not (is_at_end parser) do
290
+
if current_token parser = Token.Ellipsis then begin
291
+
advance parser;
292
+
let pat = parse_binding_pattern parser in
293
+
params := Ast.mk_pat ~loc:pat.loc (Ast.Pat_rest pat) :: !params
294
+
end else begin
295
+
let pat = parse_binding_pattern parser in
296
+
let pat =
297
+
if current_token parser = Token.Eq then begin
298
+
advance parser;
299
+
let default = parse_assignment_expression parser in
300
+
Ast.mk_pat ~loc:pat.loc (Ast.Pat_assignment { left = pat; right = default })
301
+
end else
302
+
pat
303
+
in
304
+
params := pat :: !params
305
+
end;
306
+
if current_token parser <> Token.RParen then
307
+
expect parser Token.Comma
308
+
done;
309
+
List.rev !params
310
+
311
+
and parse_function_body parser ~is_generator ~is_async : Ast.function_expression =
312
+
expect parser Token.LParen;
313
+
let params = parse_function_params parser in
314
+
expect parser Token.RParen;
315
+
expect parser Token.LBrace;
316
+
let saved_in_function = parser.in_function in
317
+
let saved_in_generator = parser.in_generator in
318
+
let saved_in_async = parser.in_async in
319
+
parser.in_function <- true;
320
+
parser.in_generator <- is_generator;
321
+
parser.in_async <- is_async;
322
+
let start_loc = current_loc parser in
323
+
let stmts = ref [] in
324
+
let directives = ref [] in
325
+
let parsing_directives = ref true in
326
+
while current_token parser <> Token.RBrace && not (is_at_end parser) do
327
+
let s = parse_statement parser in
328
+
if !parsing_directives then begin
329
+
match s.Ast.stmt with
330
+
| Ast.Expression { Ast.expr = Ast.Literal (Ast.Lit_string str); _ } ->
331
+
directives := str :: !directives;
332
+
if str = "use strict" then parser.strict_mode <- true
333
+
| _ -> parsing_directives := false
334
+
end;
335
+
stmts := s :: !stmts
336
+
done;
337
+
let end_loc = current_loc parser in
338
+
expect parser Token.RBrace;
339
+
parser.in_function <- saved_in_function;
340
+
parser.in_generator <- saved_in_generator;
341
+
parser.in_async <- saved_in_async;
342
+
let body_loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
343
+
{
344
+
Ast.fn_id = None;
345
+
fn_params = params;
346
+
fn_body = {
347
+
body_directives = List.rev !directives;
348
+
body_statements = List.rev !stmts;
349
+
body_loc;
350
+
};
351
+
fn_generator = is_generator;
352
+
fn_async = is_async;
353
+
}
354
+
355
+
and parse_property parser : Ast.property =
356
+
let start_loc = current_loc parser in
357
+
if current_token parser = Token.Ellipsis then begin
358
+
advance parser;
359
+
let arg = parse_assignment_expression parser in
360
+
Ast.Spread_element arg
361
+
end else begin
362
+
(* Check for async keyword *)
363
+
let is_async =
364
+
match current_token parser with
365
+
| Token.Identifier "async" when not (Lexer.peek parser.lexer).preceded_by_newline ->
366
+
let next = Lexer.peek parser.lexer in
367
+
(* async is a method prefix only if followed by method name, not colon or paren *)
368
+
if next.tok <> Token.Colon && next.tok <> Token.LParen then begin
369
+
advance parser;
370
+
true
371
+
end else false
372
+
| _ -> false
373
+
in
374
+
(* Check for generator star *)
375
+
let is_generator =
376
+
if current_token parser = Token.Star then begin
377
+
advance parser;
378
+
true
379
+
end else false
380
+
in
381
+
let kind =
382
+
match current_token parser with
383
+
| Token.Identifier "get" when not is_generator && not is_async ->
384
+
let next = Lexer.peek parser.lexer in
385
+
if next.tok <> Token.Colon && next.tok <> Token.LParen then begin
386
+
advance parser; Ast.Get
387
+
end else Ast.Init
388
+
| Token.Identifier "set" when not is_generator && not is_async ->
389
+
let next = Lexer.peek parser.lexer in
390
+
if next.tok <> Token.Colon && next.tok <> Token.LParen then begin
391
+
advance parser; Ast.Set
392
+
end else Ast.Init
393
+
| _ -> Ast.Init
394
+
in
395
+
let computed = current_token parser = Token.LBracket in
396
+
let key =
397
+
if computed then begin
398
+
advance parser;
399
+
let k = parse_assignment_expression parser in
400
+
expect parser Token.RBracket;
401
+
k
402
+
end else begin
403
+
match current_token parser with
404
+
| Token.Identifier name ->
405
+
let loc = current_loc parser in
406
+
advance parser;
407
+
Ast.mk_expr ~loc (Ast.Literal (Ast.Lit_string name))
408
+
| Token.Keyword kw ->
409
+
let name = Token.keyword_to_string kw in
410
+
let loc = current_loc parser in
411
+
advance parser;
412
+
Ast.mk_expr ~loc (Ast.Literal (Ast.Lit_string name))
413
+
| Token.Number (n, _) ->
414
+
let loc = current_loc parser in
415
+
advance parser;
416
+
Ast.mk_expr ~loc (Ast.Literal (Ast.Lit_number n))
417
+
| Token.String (s, _) ->
418
+
let loc = current_loc parser in
419
+
advance parser;
420
+
Ast.mk_expr ~loc (Ast.Literal (Ast.Lit_string s))
421
+
| _ -> error parser Expected_expression
422
+
end
423
+
in
424
+
match current_token parser with
425
+
| Token.LParen ->
426
+
let fn = parse_function_body parser ~is_generator ~is_async in
427
+
let end_loc = current_loc parser in
428
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
429
+
let value = Ast.mk_expr ~loc (Ast.Function fn) in
430
+
Ast.Property { key; value; kind; shorthand = false; computed; method_ = true }
431
+
| Token.Colon when not is_generator && not is_async ->
432
+
advance parser;
433
+
let value = parse_assignment_expression parser in
434
+
Ast.Property { key; value; kind; shorthand = false; computed; method_ = false }
435
+
| _ when not computed && kind = Ast.Init && not is_generator && not is_async ->
436
+
let name = match key.expr with
437
+
| Ast.Literal (Ast.Lit_string s) -> s
438
+
| _ -> error parser Expected_identifier
439
+
in
440
+
let ident_expr = Ast.mk_expr ~loc:key.loc (Ast.Identifier { Ast.name; loc = key.loc }) in
441
+
(* Check for shorthand with default value: { x = 1 } *)
442
+
let value =
443
+
if current_token parser = Token.Eq then begin
444
+
advance parser;
445
+
let default = parse_assignment_expression parser in
446
+
let left_pat = Ast.mk_pat ~loc:key.loc (Ast.Pat_identifier { Ast.name; loc = key.loc }) in
447
+
Ast.mk_expr ~loc:key.loc (Ast.Assignment { operator = Ast.Assign; left = left_pat; right = default })
448
+
end else
449
+
ident_expr
450
+
in
451
+
Ast.Property { key; value; kind; shorthand = true; computed = false; method_ = false }
452
+
| _ -> error parser (Expected_token (":", current_token parser))
453
+
end
454
+
455
+
and parse_array_literal parser : Ast.expression =
456
+
let start_loc = current_loc parser in
457
+
expect parser Token.LBracket;
458
+
let elements = ref [] in
459
+
while current_token parser <> Token.RBracket && not (is_at_end parser) do
460
+
if current_token parser = Token.Comma then begin
461
+
elements := None :: !elements;
462
+
advance parser
463
+
end else begin
464
+
let elem =
465
+
if current_token parser = Token.Ellipsis then begin
466
+
advance parser;
467
+
let arg = parse_assignment_expression parser in
468
+
Ast.mk_expr ~loc:arg.loc (Ast.Spread arg)
469
+
end else
470
+
parse_assignment_expression parser
471
+
in
472
+
elements := Some elem :: !elements;
473
+
if current_token parser <> Token.RBracket then
474
+
expect parser Token.Comma
475
+
end
476
+
done;
477
+
let end_loc = current_loc parser in
478
+
expect parser Token.RBracket;
479
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
480
+
Ast.mk_expr ~loc (Ast.Array (List.rev !elements))
481
+
482
+
and parse_object_literal parser : Ast.expression =
483
+
let start_loc = current_loc parser in
484
+
expect parser Token.LBrace;
485
+
let properties = ref [] in
486
+
while current_token parser <> Token.RBrace && not (is_at_end parser) do
487
+
let prop = parse_property parser in
488
+
properties := prop :: !properties;
489
+
if current_token parser <> Token.RBrace then
490
+
expect parser Token.Comma
491
+
done;
492
+
let end_loc = current_loc parser in
493
+
expect parser Token.RBrace;
494
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
495
+
Ast.mk_expr ~loc (Ast.Object (List.rev !properties))
496
+
497
+
and parse_primary_expression parser : Ast.expression =
498
+
let loc = current_loc parser in
499
+
match current_token parser with
500
+
| Token.Keyword Token.Kw_this ->
501
+
advance parser;
502
+
Ast.mk_expr ~loc Ast.This
503
+
504
+
| Token.Keyword Token.Kw_super ->
505
+
advance parser;
506
+
Ast.mk_expr ~loc Ast.Super
507
+
508
+
(* Async function expression - must come before generic identifier *)
509
+
| Token.Identifier "async" when (Lexer.peek parser.lexer).tok = Token.Keyword Token.Kw_function ->
510
+
let start_loc = current_loc parser in
511
+
advance parser; (* consume async *)
512
+
advance parser; (* consume function *)
513
+
let is_generator = current_token parser = Token.Star in
514
+
if is_generator then advance parser;
515
+
let fn_id =
516
+
match current_token parser with
517
+
| Token.Identifier _ -> Some (parse_identifier parser)
518
+
| _ -> None
519
+
in
520
+
let fn = parse_function_body parser ~is_generator ~is_async:true in
521
+
let end_loc = current_loc parser in
522
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
523
+
Ast.mk_expr ~loc (Ast.Function { fn with fn_id })
524
+
525
+
| Token.Identifier name ->
526
+
advance parser;
527
+
Ast.mk_expr ~loc (Ast.Identifier { Ast.name; loc })
528
+
529
+
(* Strict mode reserved words can be identifiers in non-strict mode *)
530
+
| Token.Keyword kw when not parser.strict_mode && is_strict_reserved kw ->
531
+
let name = Token.keyword_to_string kw in
532
+
advance parser;
533
+
Ast.mk_expr ~loc (Ast.Identifier { Ast.name; loc })
534
+
535
+
(* Contextual keywords (except async which is handled above) can be identifiers *)
536
+
| Token.Keyword kw when is_contextual_keyword kw && kw <> Token.Kw_async ->
537
+
let name = Token.keyword_to_string kw in
538
+
advance parser;
539
+
Ast.mk_expr ~loc (Ast.Identifier { Ast.name; loc })
540
+
541
+
(* 'await' can be identifier when not in async function and not in module (strict mode) *)
542
+
| Token.Keyword Token.Kw_await when not parser.in_async && not parser.strict_mode ->
543
+
advance parser;
544
+
Ast.mk_expr ~loc (Ast.Identifier { Ast.name = "await"; loc })
545
+
546
+
(* 'yield' can be identifier when not in generator and not in strict mode *)
547
+
| Token.Keyword Token.Kw_yield when not parser.in_generator && not parser.strict_mode ->
548
+
advance parser;
549
+
Ast.mk_expr ~loc (Ast.Identifier { Ast.name = "yield"; loc })
550
+
551
+
(* Private identifier *)
552
+
| Token.Private_identifier name ->
553
+
advance parser;
554
+
Ast.mk_expr ~loc (Ast.Private_identifier name)
555
+
556
+
| Token.Keyword Token.Kw_null
557
+
| Token.Keyword Token.Kw_true
558
+
| Token.Keyword Token.Kw_false
559
+
| Token.Number _ | Token.BigInt _
560
+
| Token.String _ | Token.Regexp _ ->
561
+
parse_literal parser
562
+
563
+
| Token.LBracket ->
564
+
parse_array_literal parser
565
+
566
+
| Token.LBrace ->
567
+
parse_object_literal parser
568
+
569
+
| Token.LParen ->
570
+
advance parser;
571
+
let expr = parse_expression parser in
572
+
expect parser Token.RParen;
573
+
Ast.mk_expr ~loc:expr.Ast.loc (Ast.Paren expr)
574
+
575
+
| Token.Keyword Token.Kw_function ->
576
+
let start_loc = current_loc parser in
577
+
advance parser;
578
+
let is_generator = current_token parser = Token.Star in
579
+
if is_generator then advance parser;
580
+
let fn_id =
581
+
match current_token parser with
582
+
| Token.Identifier _ -> Some (parse_identifier parser)
583
+
| _ -> None
584
+
in
585
+
let fn = parse_function_body parser ~is_generator ~is_async:false in
586
+
let end_loc = current_loc parser in
587
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
588
+
Ast.mk_expr ~loc (Ast.Function { fn with fn_id })
589
+
590
+
| Token.Keyword Token.Kw_new ->
591
+
let start_loc = current_loc parser in
592
+
advance parser;
593
+
(* Check for new.target meta-property *)
594
+
if current_token parser = Token.Dot then begin
595
+
advance parser;
596
+
match current_token parser with
597
+
| Token.Identifier "target" | Token.Keyword Token.Kw_target ->
598
+
let end_loc = current_loc parser in
599
+
advance parser;
600
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
601
+
let meta = { Ast.name = "new"; loc = start_loc } in
602
+
let property = { Ast.name = "target"; loc = end_loc } in
603
+
Ast.mk_expr ~loc (Ast.Meta_property { meta; property })
604
+
| _ -> error parser Expected_identifier
605
+
end else begin
606
+
let callee = parse_member_expression parser in
607
+
let arguments =
608
+
if current_token parser = Token.LParen then
609
+
parse_arguments parser
610
+
else
611
+
[]
612
+
in
613
+
let end_loc = current_loc parser in
614
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
615
+
Ast.mk_expr ~loc (Ast.New { callee; arguments })
616
+
end
617
+
618
+
(* Template literals *)
619
+
| Token.Template (Token.Template_no_sub raw) ->
620
+
advance parser;
621
+
let cooked = Some raw in (* Simplified - should decode escapes *)
622
+
let quasi = {
623
+
Ast.quasis = [{ Ast.raw; cooked; tail = true }];
624
+
expressions = [];
625
+
} in
626
+
Ast.mk_expr ~loc (Ast.Template quasi)
627
+
628
+
| Token.Template (Token.Template_head raw) ->
629
+
let start_loc = current_loc parser in
630
+
advance parser;
631
+
let quasis = ref [{ Ast.raw; cooked = Some raw; tail = false }] in
632
+
let expressions = ref [] in
633
+
let rec parse_template_rest () =
634
+
let expr = parse_expression parser in
635
+
expressions := expr :: !expressions;
636
+
let tail_tok = Lexer.scan_template_tail parser.lexer in
637
+
parser.current <- tail_tok;
638
+
match tail_tok.tok with
639
+
| Token.Template (Token.Template_tail raw) ->
640
+
quasis := { Ast.raw; cooked = Some raw; tail = true } :: !quasis;
641
+
advance parser
642
+
| Token.Template (Token.Template_middle raw) ->
643
+
quasis := { Ast.raw; cooked = Some raw; tail = false } :: !quasis;
644
+
advance parser;
645
+
parse_template_rest ()
646
+
| _ -> error parser (Expected_token ("}", current_token parser))
647
+
in
648
+
parse_template_rest ();
649
+
let end_loc = current_loc parser in
650
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
651
+
let quasi = {
652
+
Ast.quasis = List.rev !quasis;
653
+
expressions = List.rev !expressions;
654
+
} in
655
+
Ast.mk_expr ~loc (Ast.Template quasi)
656
+
657
+
(* Dynamic import: import("module") or import.meta or import.source *)
658
+
| Token.Keyword Token.Kw_import ->
659
+
let start_loc = current_loc parser in
660
+
advance parser;
661
+
(match current_token parser with
662
+
| Token.Dot ->
663
+
(* import.meta or import.source *)
664
+
advance parser;
665
+
(match current_token parser with
666
+
| Token.Identifier "meta" | Token.Keyword Token.Kw_meta ->
667
+
let end_loc = current_loc parser in
668
+
advance parser;
669
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
670
+
let meta = { Ast.name = "import"; loc = start_loc } in
671
+
let property = { Ast.name = "meta"; loc = end_loc } in
672
+
Ast.mk_expr ~loc (Ast.Meta_property { meta; property })
673
+
| Token.Identifier "source" ->
674
+
(* import.source(specifier) - source phase import *)
675
+
let source_loc = current_loc parser in
676
+
advance parser;
677
+
(* Parse it as a call expression: import.source becomes the callee *)
678
+
let meta = { Ast.name = "import"; loc = start_loc } in
679
+
let property = { Ast.name = "source"; loc = source_loc } in
680
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:source_loc.end_ () in
681
+
Ast.mk_expr ~loc (Ast.Meta_property { meta; property })
682
+
| _ -> error parser Expected_identifier)
683
+
| Token.LParen ->
684
+
(* import("module") or import("module", options) *)
685
+
advance parser;
686
+
let arg = parse_assignment_expression parser in
687
+
(* Allow optional comma and second argument (import attributes) *)
688
+
if current_token parser = Token.Comma then begin
689
+
advance parser;
690
+
(* Parse optional second argument if not ) *)
691
+
if current_token parser <> Token.RParen then begin
692
+
let _ = parse_assignment_expression parser in
693
+
(* Allow trailing comma *)
694
+
if current_token parser = Token.Comma then advance parser
695
+
end
696
+
end;
697
+
expect parser Token.RParen;
698
+
let end_loc = current_loc parser in
699
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
700
+
Ast.mk_expr ~loc (Ast.Import arg)
701
+
| _ -> error parser Expected_expression)
702
+
703
+
(* Class expression *)
704
+
| Token.Keyword Token.Kw_class ->
705
+
let start_loc = current_loc parser in
706
+
advance parser;
707
+
let cls_id =
708
+
match current_token parser with
709
+
| Token.Identifier _ -> Some (parse_identifier parser)
710
+
| _ -> None
711
+
in
712
+
let cls_super =
713
+
if current_token parser = Token.Keyword Token.Kw_extends then begin
714
+
advance parser;
715
+
Some (parse_call_expression parser)
716
+
end else
717
+
None
718
+
in
719
+
let cls_body = parse_class_body parser in
720
+
let end_loc = current_loc parser in
721
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
722
+
Ast.mk_expr ~loc (Ast.Class { cls_id; cls_super; cls_body })
723
+
724
+
| _ -> error parser Expected_expression
725
+
726
+
and parse_class_body parser : Ast.class_body =
727
+
let start_loc = current_loc parser in
728
+
expect parser Token.LBrace;
729
+
let elements = ref [] in
730
+
while current_token parser <> Token.RBrace && not (is_at_end parser) do
731
+
(* Handle empty semicolons (empty class elements) *)
732
+
if current_token parser = Token.Semicolon then begin
733
+
advance parser;
734
+
(* Continue to next iteration *)
735
+
end else begin
736
+
(* Check for static keyword *)
737
+
(* If 'static' is followed by ;, }, (, or =, treat it as field name not modifier *)
738
+
let is_static, parsed_static_block =
739
+
match current_token parser with
740
+
| Token.Keyword Token.Kw_static ->
741
+
let next = (Lexer.peek parser.lexer).tok in
742
+
if next = Token.Semicolon || next = Token.RBrace ||
743
+
next = Token.LParen || next = Token.Eq then
744
+
(* 'static' is the property name, not a modifier *)
745
+
(false, false)
746
+
else begin
747
+
advance parser; (* consume 'static' *)
748
+
(* Check for static initialization block *)
749
+
if current_token parser = Token.LBrace then begin
750
+
advance parser; (* consume '{' *)
751
+
let stmts = ref [] in
752
+
while current_token parser <> Token.RBrace && not (is_at_end parser) do
753
+
stmts := parse_statement parser :: !stmts
754
+
done;
755
+
expect parser Token.RBrace;
756
+
elements := Ast.Static_block (List.rev !stmts) :: !elements;
757
+
(true, true) (* is_static=true, parsed_static_block=true *)
758
+
end else if current_token parser = Token.Semicolon ||
759
+
current_token parser = Token.Eq then begin
760
+
(* 'static' itself is the field name *)
761
+
let loc = current_loc parser in
762
+
let key = Ast.mk_expr ~loc (Ast.Literal (Ast.Lit_string "static")) in
763
+
let value =
764
+
if current_token parser = Token.Eq then begin
765
+
advance parser;
766
+
Some (parse_assignment_expression parser)
767
+
end else
768
+
None
769
+
in
770
+
expect_semicolon parser;
771
+
elements := Ast.Property_definition { key; value; static = false; computed = false } :: !elements;
772
+
(false, true) (* is_static=false, parsed_static_block=true (skip rest) *)
773
+
end else begin
774
+
(true, false) (* is_static=true, continue parsing element *)
775
+
end
776
+
end
777
+
| _ -> (false, false)
778
+
in
779
+
(* Skip rest if we just parsed a static block *)
780
+
if not parsed_static_block then begin
781
+
(* Check for generator *)
782
+
let is_generator =
783
+
if current_token parser = Token.Star then begin
784
+
advance parser;
785
+
true
786
+
end else
787
+
false
788
+
in
789
+
(* Check for async *)
790
+
let is_async =
791
+
match current_token parser with
792
+
| Token.Identifier "async" when not (Lexer.peek parser.lexer).preceded_by_newline ->
793
+
advance parser;
794
+
true
795
+
| _ -> false
796
+
in
797
+
let is_generator = is_generator || (current_token parser = Token.Star && (advance parser; true)) in
798
+
(* Check for getter/setter *)
799
+
let kind =
800
+
match current_token parser with
801
+
| Token.Identifier "get" ->
802
+
let next = Lexer.peek parser.lexer in
803
+
if next.tok <> Token.LParen then begin
804
+
advance parser;
805
+
Ast.Get_method
806
+
end else Ast.Method
807
+
| Token.Identifier "set" ->
808
+
let next = Lexer.peek parser.lexer in
809
+
if next.tok <> Token.LParen then begin
810
+
advance parser;
811
+
Ast.Set_method
812
+
end else Ast.Method
813
+
| _ -> Ast.Method
814
+
in
815
+
(* Parse key *)
816
+
let computed = current_token parser = Token.LBracket in
817
+
let key =
818
+
if computed then begin
819
+
advance parser;
820
+
let k = parse_assignment_expression parser in
821
+
expect parser Token.RBracket;
822
+
k
823
+
end else begin
824
+
match current_token parser with
825
+
| Token.Identifier name ->
826
+
let loc = current_loc parser in
827
+
advance parser;
828
+
Ast.mk_expr ~loc (Ast.Literal (Ast.Lit_string name))
829
+
| Token.Keyword kw ->
830
+
let name = Token.keyword_to_string kw in
831
+
let loc = current_loc parser in
832
+
advance parser;
833
+
Ast.mk_expr ~loc (Ast.Literal (Ast.Lit_string name))
834
+
| Token.Number (n, _) ->
835
+
let loc = current_loc parser in
836
+
advance parser;
837
+
Ast.mk_expr ~loc (Ast.Literal (Ast.Lit_number n))
838
+
| Token.String (s, _) ->
839
+
let loc = current_loc parser in
840
+
advance parser;
841
+
Ast.mk_expr ~loc (Ast.Literal (Ast.Lit_string s))
842
+
| Token.Private_identifier name ->
843
+
let loc = current_loc parser in
844
+
advance parser;
845
+
Ast.mk_expr ~loc (Ast.Private_identifier name)
846
+
| _ -> error parser Expected_identifier
847
+
end
848
+
in
849
+
(* Check for constructor *)
850
+
let kind =
851
+
if not computed && not is_static then
852
+
match key.Ast.expr with
853
+
| Ast.Literal (Ast.Lit_string "constructor") -> Ast.Constructor
854
+
| _ -> kind
855
+
else kind
856
+
in
857
+
(* Parse method body or property *)
858
+
match current_token parser with
859
+
| Token.LParen ->
860
+
let fn = parse_function_body parser ~is_generator ~is_async in
861
+
elements := Ast.Method_definition { key; value = fn; kind; static = is_static; computed } :: !elements
862
+
| Token.Eq ->
863
+
advance parser;
864
+
let value = Some (parse_assignment_expression parser) in
865
+
expect_semicolon parser;
866
+
elements := Ast.Property_definition { key; value; static = is_static; computed } :: !elements
867
+
| Token.Semicolon ->
868
+
advance parser;
869
+
elements := Ast.Property_definition { key; value = None; static = is_static; computed } :: !elements
870
+
| _ ->
871
+
(* Property without value *)
872
+
elements := Ast.Property_definition { key; value = None; static = is_static; computed } :: !elements
873
+
end (* if not parsed_static_block *)
874
+
end (* else (not semicolon) *)
875
+
done;
876
+
let end_loc = current_loc parser in
877
+
expect parser Token.RBrace;
878
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
879
+
{ Ast.cls_elements = List.rev !elements; loc }
880
+
881
+
and parse_arguments parser : Ast.expression list =
882
+
expect parser Token.LParen;
883
+
let args = ref [] in
884
+
while current_token parser <> Token.RParen && not (is_at_end parser) do
885
+
let arg =
886
+
if current_token parser = Token.Ellipsis then begin
887
+
advance parser;
888
+
let arg = parse_assignment_expression parser in
889
+
Ast.mk_expr ~loc:arg.loc (Ast.Spread arg)
890
+
end else
891
+
parse_assignment_expression parser
892
+
in
893
+
args := arg :: !args;
894
+
if current_token parser <> Token.RParen then
895
+
expect parser Token.Comma
896
+
done;
897
+
expect parser Token.RParen;
898
+
List.rev !args
899
+
900
+
and parse_member_expression parser : Ast.expression =
901
+
let expr = parse_primary_expression parser in
902
+
parse_member_expression_tail parser expr
903
+
904
+
and parse_member_expression_tail parser (expr : Ast.expression) : Ast.expression =
905
+
match current_token parser with
906
+
| Token.Dot ->
907
+
advance parser;
908
+
let property_loc = current_loc parser in
909
+
let property = match current_token parser with
910
+
| Token.Identifier name ->
911
+
advance parser;
912
+
Ast.mk_expr ~loc:property_loc (Ast.Literal (Ast.Lit_string name))
913
+
| Token.Keyword kw ->
914
+
let name = Token.keyword_to_string kw in
915
+
advance parser;
916
+
Ast.mk_expr ~loc:property_loc (Ast.Literal (Ast.Lit_string name))
917
+
| Token.Private_identifier name ->
918
+
advance parser;
919
+
Ast.mk_expr ~loc:property_loc (Ast.Private_identifier name)
920
+
| _ -> error parser Expected_identifier
921
+
in
922
+
let loc = Source.mk_loc ~start:expr.Ast.loc.start ~end_:property_loc.end_ () in
923
+
let new_expr = Ast.mk_expr ~loc (Ast.Member { object_ = expr; property; computed = false; optional = false }) in
924
+
parse_member_expression_tail parser new_expr
925
+
926
+
| Token.LBracket ->
927
+
advance parser;
928
+
let property = parse_expression parser in
929
+
let end_loc = current_loc parser in
930
+
expect parser Token.RBracket;
931
+
let loc = Source.mk_loc ~start:expr.Ast.loc.start ~end_:end_loc.end_ () in
932
+
let new_expr = Ast.mk_expr ~loc (Ast.Member { object_ = expr; property; computed = true; optional = false }) in
933
+
parse_member_expression_tail parser new_expr
934
+
935
+
(* Optional chaining: obj?.prop, obj?.[expr], or obj?.() *)
936
+
| Token.Question_dot ->
937
+
advance parser;
938
+
(match current_token parser with
939
+
| Token.LParen ->
940
+
(* Optional call: obj?.() *)
941
+
let arguments = parse_arguments parser in
942
+
let end_loc = current_loc parser in
943
+
let loc = Source.mk_loc ~start:expr.Ast.loc.start ~end_:end_loc.end_ () in
944
+
let new_expr = Ast.mk_expr ~loc (Ast.Call { callee = expr; arguments; optional = true }) in
945
+
parse_member_expression_tail parser new_expr
946
+
| Token.LBracket ->
947
+
advance parser;
948
+
let property = parse_expression parser in
949
+
let end_loc = current_loc parser in
950
+
expect parser Token.RBracket;
951
+
let loc = Source.mk_loc ~start:expr.Ast.loc.start ~end_:end_loc.end_ () in
952
+
let new_expr = Ast.mk_expr ~loc (Ast.Member { object_ = expr; property; computed = true; optional = true }) in
953
+
parse_member_expression_tail parser new_expr
954
+
| Token.Private_identifier name ->
955
+
let property_loc = current_loc parser in
956
+
advance parser;
957
+
let property = Ast.mk_expr ~loc:property_loc (Ast.Private_identifier name) in
958
+
let loc = Source.mk_loc ~start:expr.Ast.loc.start ~end_:property_loc.end_ () in
959
+
let new_expr = Ast.mk_expr ~loc (Ast.Member { object_ = expr; property; computed = false; optional = true }) in
960
+
parse_member_expression_tail parser new_expr
961
+
| Token.Identifier name ->
962
+
let property_loc = current_loc parser in
963
+
advance parser;
964
+
let property = Ast.mk_expr ~loc:property_loc (Ast.Literal (Ast.Lit_string name)) in
965
+
let loc = Source.mk_loc ~start:expr.Ast.loc.start ~end_:property_loc.end_ () in
966
+
let new_expr = Ast.mk_expr ~loc (Ast.Member { object_ = expr; property; computed = false; optional = true }) in
967
+
parse_member_expression_tail parser new_expr
968
+
| Token.Keyword kw ->
969
+
let name = Token.keyword_to_string kw in
970
+
let property_loc = current_loc parser in
971
+
advance parser;
972
+
let property = Ast.mk_expr ~loc:property_loc (Ast.Literal (Ast.Lit_string name)) in
973
+
let loc = Source.mk_loc ~start:expr.Ast.loc.start ~end_:property_loc.end_ () in
974
+
let new_expr = Ast.mk_expr ~loc (Ast.Member { object_ = expr; property; computed = false; optional = true }) in
975
+
parse_member_expression_tail parser new_expr
976
+
| _ -> error parser Expected_identifier)
977
+
978
+
| _ -> expr
979
+
980
+
and parse_call_expression parser : Ast.expression =
981
+
let expr = parse_member_expression parser in
982
+
parse_call_expression_tail parser expr
983
+
984
+
and parse_call_expression_tail parser (expr : Ast.expression) : Ast.expression =
985
+
match current_token parser with
986
+
| Token.LParen ->
987
+
let arguments = parse_arguments parser in
988
+
let end_loc = current_loc parser in
989
+
let loc = Source.mk_loc ~start:expr.Ast.loc.start ~end_:end_loc.end_ () in
990
+
let new_expr = Ast.mk_expr ~loc (Ast.Call { callee = expr; arguments; optional = false }) in
991
+
parse_call_expression_tail parser new_expr
992
+
993
+
| Token.Dot | Token.LBracket | Token.Question_dot ->
994
+
let new_expr = parse_member_expression_tail parser expr in
995
+
parse_call_expression_tail parser new_expr
996
+
997
+
(* Tagged template: tag`template` *)
998
+
| Token.Template (Token.Template_no_sub raw) ->
999
+
advance parser;
1000
+
let quasi = {
1001
+
Ast.quasis = [{ Ast.raw; cooked = Some raw; tail = true }];
1002
+
expressions = [];
1003
+
} in
1004
+
let end_loc = current_loc parser in
1005
+
let loc = Source.mk_loc ~start:expr.Ast.loc.start ~end_:end_loc.end_ () in
1006
+
let new_expr = Ast.mk_expr ~loc (Ast.TaggedTemplate { tag = expr; quasi }) in
1007
+
parse_call_expression_tail parser new_expr
1008
+
1009
+
| Token.Template (Token.Template_head raw) ->
1010
+
let start_loc = expr.Ast.loc in
1011
+
advance parser;
1012
+
let quasis = ref [{ Ast.raw; cooked = Some raw; tail = false }] in
1013
+
let expressions = ref [] in
1014
+
let rec parse_template_rest () =
1015
+
let expr = parse_expression parser in
1016
+
expressions := expr :: !expressions;
1017
+
let tail_tok = Lexer.scan_template_tail parser.lexer in
1018
+
parser.current <- tail_tok;
1019
+
match tail_tok.tok with
1020
+
| Token.Template (Token.Template_tail raw) ->
1021
+
quasis := { Ast.raw; cooked = Some raw; tail = true } :: !quasis;
1022
+
advance parser
1023
+
| Token.Template (Token.Template_middle raw) ->
1024
+
quasis := { Ast.raw; cooked = Some raw; tail = false } :: !quasis;
1025
+
advance parser;
1026
+
parse_template_rest ()
1027
+
| _ -> error parser (Expected_token ("}", current_token parser))
1028
+
in
1029
+
parse_template_rest ();
1030
+
let end_loc = current_loc parser in
1031
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
1032
+
let quasi = {
1033
+
Ast.quasis = List.rev !quasis;
1034
+
expressions = List.rev !expressions;
1035
+
} in
1036
+
let new_expr = Ast.mk_expr ~loc (Ast.TaggedTemplate { tag = expr; quasi }) in
1037
+
parse_call_expression_tail parser new_expr
1038
+
1039
+
| _ -> expr
1040
+
1041
+
and parse_update_expression parser : Ast.expression =
1042
+
let start_loc = current_loc parser in
1043
+
match current_token parser with
1044
+
| Token.Plus_plus ->
1045
+
advance parser;
1046
+
let argument = parse_unary_expression parser in
1047
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:argument.Ast.loc.end_ () in
1048
+
Ast.mk_expr ~loc (Ast.Update { operator = Ast.Incr; argument; prefix = true })
1049
+
| Token.Minus_minus ->
1050
+
advance parser;
1051
+
let argument = parse_unary_expression parser in
1052
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:argument.Ast.loc.end_ () in
1053
+
Ast.mk_expr ~loc (Ast.Update { operator = Ast.Decr; argument; prefix = true })
1054
+
| _ ->
1055
+
let argument = parse_call_expression parser in
1056
+
if not parser.current.preceded_by_newline then
1057
+
match current_token parser with
1058
+
| Token.Plus_plus ->
1059
+
let end_loc = current_loc parser in
1060
+
advance parser;
1061
+
let loc = Source.mk_loc ~start:argument.Ast.loc.start ~end_:end_loc.end_ () in
1062
+
Ast.mk_expr ~loc (Ast.Update { operator = Ast.Incr; argument; prefix = false })
1063
+
| Token.Minus_minus ->
1064
+
let end_loc = current_loc parser in
1065
+
advance parser;
1066
+
let loc = Source.mk_loc ~start:argument.Ast.loc.start ~end_:end_loc.end_ () in
1067
+
Ast.mk_expr ~loc (Ast.Update { operator = Ast.Decr; argument; prefix = false })
1068
+
| _ -> argument
1069
+
else
1070
+
argument
1071
+
1072
+
and parse_unary_expression parser : Ast.expression =
1073
+
let start_loc = current_loc parser in
1074
+
match current_token parser with
1075
+
| Token.Bang ->
1076
+
advance parser;
1077
+
let argument = parse_unary_expression parser in
1078
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:argument.Ast.loc.end_ () in
1079
+
Ast.mk_expr ~loc (Ast.Unary { operator = Ast.Not; argument })
1080
+
| Token.Tilde ->
1081
+
advance parser;
1082
+
let argument = parse_unary_expression parser in
1083
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:argument.Ast.loc.end_ () in
1084
+
Ast.mk_expr ~loc (Ast.Unary { operator = Ast.Bitnot; argument })
1085
+
| Token.Plus ->
1086
+
advance parser;
1087
+
let argument = parse_unary_expression parser in
1088
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:argument.Ast.loc.end_ () in
1089
+
Ast.mk_expr ~loc (Ast.Unary { operator = Ast.Pos; argument })
1090
+
| Token.Minus ->
1091
+
advance parser;
1092
+
let argument = parse_unary_expression parser in
1093
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:argument.Ast.loc.end_ () in
1094
+
Ast.mk_expr ~loc (Ast.Unary { operator = Ast.Neg; argument })
1095
+
| Token.Keyword Token.Kw_typeof ->
1096
+
advance parser;
1097
+
let argument = parse_unary_expression parser in
1098
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:argument.Ast.loc.end_ () in
1099
+
Ast.mk_expr ~loc (Ast.Unary { operator = Ast.Typeof; argument })
1100
+
| Token.Keyword Token.Kw_void ->
1101
+
advance parser;
1102
+
let argument = parse_unary_expression parser in
1103
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:argument.Ast.loc.end_ () in
1104
+
Ast.mk_expr ~loc (Ast.Unary { operator = Ast.Void; argument })
1105
+
| Token.Keyword Token.Kw_delete ->
1106
+
advance parser;
1107
+
let argument = parse_unary_expression parser in
1108
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:argument.Ast.loc.end_ () in
1109
+
Ast.mk_expr ~loc (Ast.Unary { operator = Ast.Delete; argument })
1110
+
| Token.Keyword Token.Kw_await when parser.in_async || (parser.strict_mode && not parser.in_function) ->
1111
+
(* await is allowed in async functions and at module top level (top-level await in modules) *)
1112
+
(* In scripts at top level, 'await' is an identifier, not an await expression *)
1113
+
advance parser;
1114
+
let argument = parse_unary_expression parser in
1115
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:argument.Ast.loc.end_ () in
1116
+
Ast.mk_expr ~loc (Ast.Await argument)
1117
+
| _ ->
1118
+
parse_update_expression parser
1119
+
1120
+
and precedence tok =
1121
+
match tok with
1122
+
| Token.Pipe_pipe -> 1
1123
+
| Token.Ampersand_ampersand -> 2
1124
+
| Token.Pipe -> 3
1125
+
| Token.Caret -> 4
1126
+
| Token.Ampersand -> 5
1127
+
| Token.Eq_eq | Token.Not_eq | Token.Eq_eq_eq | Token.Not_eq_eq -> 6
1128
+
| Token.Lt | Token.Gt | Token.Lt_eq | Token.Gt_eq
1129
+
| Token.Keyword Token.Kw_in | Token.Keyword Token.Kw_instanceof -> 7
1130
+
| Token.Lt_lt | Token.Gt_gt | Token.Gt_gt_gt -> 8
1131
+
| Token.Plus | Token.Minus -> 9
1132
+
| Token.Star | Token.Slash | Token.Percent -> 10
1133
+
| Token.Star_star -> 11
1134
+
| Token.Question_question -> 0
1135
+
| _ -> -1
1136
+
1137
+
and token_to_binary_op tok =
1138
+
match tok with
1139
+
| Token.Eq_eq -> Some Ast.Eq
1140
+
| Token.Not_eq -> Some Ast.Neq
1141
+
| Token.Eq_eq_eq -> Some Ast.Strict_eq
1142
+
| Token.Not_eq_eq -> Some Ast.Strict_neq
1143
+
| Token.Lt -> Some Ast.Lt
1144
+
| Token.Lt_eq -> Some Ast.Lte
1145
+
| Token.Gt -> Some Ast.Gt
1146
+
| Token.Gt_eq -> Some Ast.Gte
1147
+
| Token.Plus -> Some Ast.Plus
1148
+
| Token.Minus -> Some Ast.Minus
1149
+
| Token.Star -> Some Ast.Times
1150
+
| Token.Slash -> Some Ast.Div
1151
+
| Token.Percent -> Some Ast.Mod
1152
+
| Token.Star_star -> Some Ast.Exp
1153
+
| Token.Pipe -> Some Ast.Bitor
1154
+
| Token.Caret -> Some Ast.Bitxor
1155
+
| Token.Ampersand -> Some Ast.Bitand
1156
+
| Token.Lt_lt -> Some Ast.Lshift
1157
+
| Token.Gt_gt -> Some Ast.Rshift
1158
+
| Token.Gt_gt_gt -> Some Ast.Urshift
1159
+
| Token.Keyword Token.Kw_in -> Some Ast.In
1160
+
| Token.Keyword Token.Kw_instanceof -> Some Ast.Instanceof
1161
+
| _ -> None
1162
+
1163
+
and token_to_logical_op tok =
1164
+
match tok with
1165
+
| Token.Pipe_pipe -> Some Ast.Or
1166
+
| Token.Ampersand_ampersand -> Some Ast.And
1167
+
| Token.Question_question -> Some Ast.Nullish
1168
+
| _ -> None
1169
+
1170
+
and parse_binary_expression parser min_prec : Ast.expression =
1171
+
let left = parse_unary_expression parser in
1172
+
parse_binary_expression_tail parser left min_prec
1173
+
1174
+
and parse_binary_expression_tail parser (left : Ast.expression) min_prec : Ast.expression =
1175
+
let tok = current_token parser in
1176
+
(* Check if 'in' is allowed in this context *)
1177
+
let prec =
1178
+
if tok = Token.Keyword Token.Kw_in && not parser.allow_in then
1179
+
-1 (* Disallow 'in' as binary operator *)
1180
+
else
1181
+
precedence tok
1182
+
in
1183
+
if prec < min_prec then
1184
+
left
1185
+
else begin
1186
+
advance parser;
1187
+
let next_min_prec = if tok = Token.Star_star then prec else prec + 1 in
1188
+
let right = parse_binary_expression parser next_min_prec in
1189
+
let loc = Source.mk_loc ~start:left.Ast.loc.start ~end_:right.Ast.loc.end_ () in
1190
+
let new_left =
1191
+
match token_to_logical_op tok with
1192
+
| Some op ->
1193
+
Ast.mk_expr ~loc (Ast.Logical { operator = op; left; right })
1194
+
| None ->
1195
+
match token_to_binary_op tok with
1196
+
| Some op ->
1197
+
Ast.mk_expr ~loc (Ast.Binary { operator = op; left; right })
1198
+
| None ->
1199
+
error parser (Unexpected_token tok)
1200
+
in
1201
+
parse_binary_expression_tail parser new_left min_prec
1202
+
end
1203
+
1204
+
and parse_conditional_expression parser : Ast.expression =
1205
+
let test = parse_binary_expression parser 0 in
1206
+
if current_token parser = Token.Question then begin
1207
+
advance parser;
1208
+
let consequent = parse_assignment_expression parser in
1209
+
expect parser Token.Colon;
1210
+
let alternate = parse_assignment_expression parser in
1211
+
let loc = Source.mk_loc ~start:test.Ast.loc.start ~end_:alternate.Ast.loc.end_ () in
1212
+
Ast.mk_expr ~loc (Ast.Conditional { test; consequent; alternate })
1213
+
end else
1214
+
test
1215
+
1216
+
and expr_to_pattern (expr : Ast.expression) : Ast.pattern =
1217
+
let pat_desc = match expr.Ast.expr with
1218
+
| Ast.Identifier id -> Ast.Pat_identifier id
1219
+
| Ast.Array elements ->
1220
+
let pats = List.map (function
1221
+
| None -> None
1222
+
| Some e ->
1223
+
match e.Ast.expr with
1224
+
| Ast.Spread arg -> Some (Ast.Array_pat_rest (expr_to_pattern arg))
1225
+
| _ -> Some (Ast.Array_pat_element (expr_to_pattern e))
1226
+
) elements in
1227
+
Ast.Pat_array pats
1228
+
| Ast.Object props ->
1229
+
let pat_props = List.map (function
1230
+
| Ast.Spread_element e ->
1231
+
Ast.Object_pat_rest (expr_to_pattern e)
1232
+
| Ast.Property { key; value; shorthand; computed; _ } ->
1233
+
Ast.Object_pat_property {
1234
+
key;
1235
+
value = expr_to_pattern value;
1236
+
shorthand;
1237
+
computed;
1238
+
}
1239
+
) props in
1240
+
Ast.Pat_object pat_props
1241
+
| Ast.Assignment { left; right; operator = Ast.Assign } ->
1242
+
Ast.Pat_assignment { left; right }
1243
+
| Ast.Member _ | Ast.Paren _ ->
1244
+
Ast.Pat_expression expr
1245
+
| _ ->
1246
+
raise (Parse_error (Invalid_assignment_target, expr.Ast.loc))
1247
+
in
1248
+
Ast.mk_pat ~loc:expr.Ast.loc pat_desc
1249
+
1250
+
and parse_arrow_function_body parser ~is_async : Ast.arrow_function =
1251
+
expect parser Token.Arrow;
1252
+
let params = [] in (* Will be filled by caller *)
1253
+
if current_token parser = Token.LBrace then begin
1254
+
expect parser Token.LBrace;
1255
+
let saved_in_function = parser.in_function in
1256
+
let saved_in_async = parser.in_async in
1257
+
parser.in_function <- true;
1258
+
parser.in_async <- is_async;
1259
+
let start_loc = current_loc parser in
1260
+
let stmts = ref [] in
1261
+
while current_token parser <> Token.RBrace && not (is_at_end parser) do
1262
+
stmts := parse_statement parser :: !stmts
1263
+
done;
1264
+
let end_loc = current_loc parser in
1265
+
expect parser Token.RBrace;
1266
+
parser.in_function <- saved_in_function;
1267
+
parser.in_async <- saved_in_async;
1268
+
let body_loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
1269
+
{
1270
+
Ast.ar_params = params;
1271
+
ar_body = Ast.Arrow_block {
1272
+
body_directives = [];
1273
+
body_statements = List.rev !stmts;
1274
+
body_loc;
1275
+
};
1276
+
ar_async = is_async;
1277
+
}
1278
+
end else begin
1279
+
let saved_in_function = parser.in_function in
1280
+
let saved_in_async = parser.in_async in
1281
+
parser.in_function <- true;
1282
+
parser.in_async <- is_async;
1283
+
let body = parse_assignment_expression parser in
1284
+
parser.in_function <- saved_in_function;
1285
+
parser.in_async <- saved_in_async;
1286
+
{
1287
+
Ast.ar_params = params;
1288
+
ar_body = Ast.Arrow_expression body;
1289
+
ar_async = is_async;
1290
+
}
1291
+
end
1292
+
1293
+
and try_parse_arrow_params parser : Ast.pattern list option =
1294
+
(* Try to convert current context to arrow parameters *)
1295
+
(* This is called when we've seen ( and want to check for arrow *)
1296
+
let saved_pos = Lexer.save parser.lexer in
1297
+
let saved_current = parser.current in
1298
+
try
1299
+
expect parser Token.LParen;
1300
+
let params = ref [] in
1301
+
while current_token parser <> Token.RParen && not (is_at_end parser) do
1302
+
if current_token parser = Token.Ellipsis then begin
1303
+
advance parser;
1304
+
let pat = parse_binding_pattern parser in
1305
+
params := Ast.mk_pat ~loc:pat.Ast.loc (Ast.Pat_rest pat) :: !params
1306
+
end else begin
1307
+
let pat = parse_binding_pattern parser in
1308
+
let pat =
1309
+
if current_token parser = Token.Eq then begin
1310
+
advance parser;
1311
+
let default = parse_assignment_expression parser in
1312
+
Ast.mk_pat ~loc:pat.Ast.loc (Ast.Pat_assignment { left = pat; right = default })
1313
+
end else
1314
+
pat
1315
+
in
1316
+
params := pat :: !params
1317
+
end;
1318
+
if current_token parser <> Token.RParen then
1319
+
expect parser Token.Comma
1320
+
done;
1321
+
expect parser Token.RParen;
1322
+
if current_token parser = Token.Arrow then
1323
+
Some (List.rev !params)
1324
+
else begin
1325
+
Lexer.restore parser.lexer saved_pos;
1326
+
parser.current <- saved_current;
1327
+
None
1328
+
end
1329
+
with _ ->
1330
+
Lexer.restore parser.lexer saved_pos;
1331
+
parser.current <- saved_current;
1332
+
None
1333
+
1334
+
and parse_assignment_expression parser : Ast.expression =
1335
+
(* Check for arrow function: identifier => ... *)
1336
+
let start_loc = current_loc parser in
1337
+
(match current_token parser with
1338
+
(* async arrow function must come before generic identifier *)
1339
+
| Token.Identifier "async" ->
1340
+
let next = Lexer.peek parser.lexer in
1341
+
(* async arrow function: no newline between async and param/params *)
1342
+
if not next.preceded_by_newline && (next.tok = Token.LParen || (match next.tok with Token.Identifier _ -> true | _ -> false)) then begin
1343
+
advance parser; (* consume async *)
1344
+
let async_loc = start_loc in
1345
+
(match current_token parser with
1346
+
| Token.Identifier name ->
1347
+
let next = Lexer.peek parser.lexer in
1348
+
(* No newline allowed before => *)
1349
+
if next.tok = Token.Arrow && not next.preceded_by_newline then begin
1350
+
let id_loc = current_loc parser in
1351
+
advance parser;
1352
+
let arrow = parse_arrow_function_body parser ~is_async:true in
1353
+
let param = Ast.mk_pat ~loc:id_loc (Ast.Pat_identifier { Ast.name; loc = id_loc }) in
1354
+
let end_loc = match arrow.ar_body with
1355
+
| Ast.Arrow_expression e -> e.Ast.loc
1356
+
| Ast.Arrow_block b -> b.body_loc
1357
+
in
1358
+
let loc = Source.mk_loc ~start:async_loc.start ~end_:end_loc.end_ () in
1359
+
Ast.mk_expr ~loc (Ast.Arrow { arrow with ar_params = [param] })
1360
+
end else
1361
+
parse_assignment_expression_rest parser start_loc
1362
+
| Token.LParen ->
1363
+
(match try_parse_arrow_params parser with
1364
+
| Some params ->
1365
+
let arrow = parse_arrow_function_body parser ~is_async:true in
1366
+
let end_loc = match arrow.ar_body with
1367
+
| Ast.Arrow_expression e -> e.Ast.loc
1368
+
| Ast.Arrow_block b -> b.body_loc
1369
+
in
1370
+
let loc = Source.mk_loc ~start:async_loc.start ~end_:end_loc.end_ () in
1371
+
Ast.mk_expr ~loc (Ast.Arrow { arrow with ar_params = params })
1372
+
| None ->
1373
+
parse_assignment_expression_rest parser start_loc)
1374
+
| _ ->
1375
+
parse_assignment_expression_rest parser start_loc)
1376
+
end else
1377
+
parse_assignment_expression_rest parser start_loc
1378
+
| Token.Identifier name ->
1379
+
let next = Lexer.peek parser.lexer in
1380
+
(* Arrow function: newline is NOT allowed before => *)
1381
+
if next.tok = Token.Arrow && not next.preceded_by_newline then begin
1382
+
advance parser; (* consume identifier *)
1383
+
let arrow = parse_arrow_function_body parser ~is_async:false in
1384
+
let param = Ast.mk_pat ~loc:start_loc (Ast.Pat_identifier { Ast.name; loc = start_loc }) in
1385
+
let end_loc = match arrow.ar_body with
1386
+
| Ast.Arrow_expression e -> e.Ast.loc
1387
+
| Ast.Arrow_block b -> b.body_loc
1388
+
in
1389
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
1390
+
Ast.mk_expr ~loc (Ast.Arrow { arrow with ar_params = [param] })
1391
+
end else
1392
+
parse_assignment_expression_rest parser start_loc
1393
+
| Token.LParen ->
1394
+
(* Check if this is (params) => ... *)
1395
+
(match try_parse_arrow_params parser with
1396
+
| Some params ->
1397
+
let arrow = parse_arrow_function_body parser ~is_async:false in
1398
+
let end_loc = match arrow.ar_body with
1399
+
| Ast.Arrow_expression e -> e.Ast.loc
1400
+
| Ast.Arrow_block b -> b.body_loc
1401
+
in
1402
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
1403
+
Ast.mk_expr ~loc (Ast.Arrow { arrow with ar_params = params })
1404
+
| None ->
1405
+
parse_assignment_expression_rest parser start_loc)
1406
+
| _ ->
1407
+
parse_assignment_expression_rest parser start_loc)
1408
+
1409
+
and parse_assignment_expression_rest parser start_loc : Ast.expression =
1410
+
let _ = start_loc in
1411
+
if parser.in_generator && current_token parser = Token.Keyword Token.Kw_yield then begin
1412
+
let start_loc = current_loc parser in
1413
+
advance parser;
1414
+
let delegate =
1415
+
if current_token parser = Token.Star then begin advance parser; true end else false
1416
+
in
1417
+
let argument =
1418
+
if can_start_expression parser && not parser.current.preceded_by_newline then
1419
+
Some (parse_assignment_expression parser)
1420
+
else
1421
+
None
1422
+
in
1423
+
let end_loc = match argument with Some e -> e.Ast.loc | None -> start_loc in
1424
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
1425
+
Ast.mk_expr ~loc (Ast.Yield { argument; delegate })
1426
+
end else begin
1427
+
let left = parse_conditional_expression parser in
1428
+
let assign_op = match current_token parser with
1429
+
| Token.Eq -> Some Ast.Assign
1430
+
| Token.Plus_eq -> Some Ast.Plus_assign
1431
+
| Token.Minus_eq -> Some Ast.Minus_assign
1432
+
| Token.Star_eq -> Some Ast.Times_assign
1433
+
| Token.Slash_eq -> Some Ast.Div_assign
1434
+
| Token.Percent_eq -> Some Ast.Mod_assign
1435
+
| Token.Star_star_eq -> Some Ast.Exp_assign
1436
+
| Token.Lt_lt_eq -> Some Ast.Lshift_assign
1437
+
| Token.Gt_gt_eq -> Some Ast.Rshift_assign
1438
+
| Token.Gt_gt_gt_eq -> Some Ast.Urshift_assign
1439
+
| Token.Pipe_eq -> Some Ast.Bitor_assign
1440
+
| Token.Caret_eq -> Some Ast.Bitxor_assign
1441
+
| Token.Ampersand_eq -> Some Ast.Bitand_assign
1442
+
| Token.Pipe_pipe_eq -> Some Ast.Or_assign
1443
+
| Token.Ampersand_ampersand_eq -> Some Ast.And_assign
1444
+
| Token.Question_question_eq -> Some Ast.Nullish_assign
1445
+
| _ -> None
1446
+
in
1447
+
match assign_op with
1448
+
| Some operator ->
1449
+
advance parser;
1450
+
let left_pat = expr_to_pattern left in
1451
+
let right = parse_assignment_expression parser in
1452
+
let loc = Source.mk_loc ~start:left.Ast.loc.start ~end_:right.Ast.loc.end_ () in
1453
+
Ast.mk_expr ~loc (Ast.Assignment { operator; left = left_pat; right })
1454
+
| None ->
1455
+
left
1456
+
end
1457
+
1458
+
and parse_expression parser : Ast.expression =
1459
+
let expr = parse_assignment_expression parser in
1460
+
if current_token parser = Token.Comma then begin
1461
+
let exprs = ref [expr] in
1462
+
while current_token parser = Token.Comma do
1463
+
advance parser;
1464
+
exprs := parse_assignment_expression parser :: !exprs
1465
+
done;
1466
+
let all_exprs = List.rev !exprs in
1467
+
let loc = Source.mk_loc ~start:expr.Ast.loc.start ~end_:(List.hd (List.rev all_exprs)).Ast.loc.end_ () in
1468
+
Ast.mk_expr ~loc (Ast.Sequence all_exprs)
1469
+
end else
1470
+
expr
1471
+
1472
+
and parse_variable_declaration parser kind : Ast.var_declaration =
1473
+
let start_loc = current_loc parser in
1474
+
let declarations = ref [] in
1475
+
let rec loop () =
1476
+
let id = parse_binding_pattern parser in
1477
+
let init =
1478
+
if current_token parser = Token.Eq then begin
1479
+
advance parser;
1480
+
Some (parse_assignment_expression parser)
1481
+
end else
1482
+
None
1483
+
in
1484
+
let decl_loc = match init with
1485
+
| Some e -> Source.mk_loc ~start:id.Ast.loc.start ~end_:e.Ast.loc.end_ ()
1486
+
| None -> id.Ast.loc
1487
+
in
1488
+
declarations := { Ast.var_id = id; var_init = init; decl_loc } :: !declarations;
1489
+
if current_token parser = Token.Comma then begin
1490
+
advance parser;
1491
+
loop ()
1492
+
end
1493
+
in
1494
+
loop ();
1495
+
let end_loc = (List.hd !declarations).decl_loc in
1496
+
let var_loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
1497
+
{ Ast.var_kind = kind; var_declarations = List.rev !declarations; var_loc }
1498
+
1499
+
and parse_block_statement parser : Ast.statement =
1500
+
let start_loc = current_loc parser in
1501
+
expect parser Token.LBrace;
1502
+
let stmts = ref [] in
1503
+
while current_token parser <> Token.RBrace && not (is_at_end parser) do
1504
+
stmts := parse_statement parser :: !stmts
1505
+
done;
1506
+
let end_loc = current_loc parser in
1507
+
expect parser Token.RBrace;
1508
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
1509
+
Ast.mk_stmt ~loc (Ast.Block (List.rev !stmts))
1510
+
1511
+
and parse_if_statement parser : Ast.statement =
1512
+
let start_loc = current_loc parser in
1513
+
expect parser (Token.Keyword Token.Kw_if);
1514
+
expect parser Token.LParen;
1515
+
let test = parse_expression parser in
1516
+
expect parser Token.RParen;
1517
+
let consequent = parse_statement parser in
1518
+
let alternate =
1519
+
if current_token parser = Token.Keyword Token.Kw_else then begin
1520
+
advance parser;
1521
+
Some (parse_statement parser)
1522
+
end else
1523
+
None
1524
+
in
1525
+
let end_loc = match alternate with
1526
+
| Some s -> s.Ast.loc
1527
+
| None -> consequent.Ast.loc
1528
+
in
1529
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
1530
+
Ast.mk_stmt ~loc (Ast.If { test; consequent; alternate })
1531
+
1532
+
and parse_while_statement parser : Ast.statement =
1533
+
let start_loc = current_loc parser in
1534
+
expect parser (Token.Keyword Token.Kw_while);
1535
+
expect parser Token.LParen;
1536
+
let test = parse_expression parser in
1537
+
expect parser Token.RParen;
1538
+
let saved_in_iteration = parser.in_iteration in
1539
+
parser.in_iteration <- true;
1540
+
let body = parse_statement parser in
1541
+
parser.in_iteration <- saved_in_iteration;
1542
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:body.Ast.loc.end_ () in
1543
+
Ast.mk_stmt ~loc (Ast.While { test; body })
1544
+
1545
+
and parse_for_statement parser : Ast.statement =
1546
+
let start_loc = current_loc parser in
1547
+
expect parser (Token.Keyword Token.Kw_for);
1548
+
1549
+
(* Check for 'for await' *)
1550
+
let is_await =
1551
+
match current_token parser with
1552
+
| Token.Keyword Token.Kw_await ->
1553
+
advance parser;
1554
+
true
1555
+
| _ -> false
1556
+
in
1557
+
1558
+
expect parser Token.LParen;
1559
+
1560
+
(* Parse expression without 'in' as binary operator *)
1561
+
let parse_expr_no_in () =
1562
+
let saved_allow_in = parser.allow_in in
1563
+
parser.allow_in <- false;
1564
+
let e = parse_expression parser in
1565
+
parser.allow_in <- saved_allow_in;
1566
+
e
1567
+
in
1568
+
let init =
1569
+
match current_token parser with
1570
+
| Token.Semicolon -> None
1571
+
| Token.Keyword Token.Kw_var ->
1572
+
advance parser;
1573
+
Some (Ast.For_init_var (parse_variable_declaration parser Ast.Var))
1574
+
| Token.Keyword Token.Kw_let ->
1575
+
advance parser;
1576
+
Some (Ast.For_init_var (parse_variable_declaration parser Ast.Let))
1577
+
| Token.Keyword Token.Kw_const ->
1578
+
advance parser;
1579
+
Some (Ast.For_init_var (parse_variable_declaration parser Ast.Const))
1580
+
| Token.Identifier "using" ->
1581
+
(* Check if this is 'using x of ...' or 'using' as an expression *)
1582
+
let next = Lexer.peek parser.lexer in
1583
+
(match next.tok with
1584
+
| Token.Identifier _ | Token.LBracket | Token.LBrace ->
1585
+
(* 'using' declaration *)
1586
+
advance parser;
1587
+
Some (Ast.For_init_var (parse_variable_declaration parser Ast.Using))
1588
+
| _ ->
1589
+
(* 'using' as an identifier in expression *)
1590
+
Some (Ast.For_init_expr (parse_expr_no_in ())))
1591
+
| Token.Keyword Token.Kw_await ->
1592
+
(* Check for 'await using' declaration *)
1593
+
let next = Lexer.peek parser.lexer in
1594
+
(match next.tok with
1595
+
| Token.Identifier "using" ->
1596
+
advance parser; (* skip 'await' *)
1597
+
advance parser; (* skip 'using' *)
1598
+
Some (Ast.For_init_var (parse_variable_declaration parser Ast.Await_using))
1599
+
| _ ->
1600
+
(* Just an await expression *)
1601
+
Some (Ast.For_init_expr (parse_expr_no_in ())))
1602
+
| _ ->
1603
+
Some (Ast.For_init_expr (parse_expr_no_in ()))
1604
+
in
1605
+
1606
+
match current_token parser with
1607
+
| Token.Keyword Token.Kw_in ->
1608
+
advance parser;
1609
+
let left = match init with
1610
+
| Some (Ast.For_init_var decl) -> Ast.For_in_var decl
1611
+
| Some (Ast.For_init_expr e) -> Ast.For_in_pat (expr_to_pattern e)
1612
+
| None -> error parser Expected_expression
1613
+
in
1614
+
let right = parse_expression parser in
1615
+
expect parser Token.RParen;
1616
+
let saved_in_iteration = parser.in_iteration in
1617
+
parser.in_iteration <- true;
1618
+
let body = parse_statement parser in
1619
+
parser.in_iteration <- saved_in_iteration;
1620
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:body.Ast.loc.end_ () in
1621
+
Ast.mk_stmt ~loc (Ast.For_in { left; right; body })
1622
+
1623
+
| Token.Identifier "of" ->
1624
+
advance parser;
1625
+
let left = match init with
1626
+
| Some (Ast.For_init_var decl) -> Ast.For_in_var decl
1627
+
| Some (Ast.For_init_expr e) -> Ast.For_in_pat (expr_to_pattern e)
1628
+
| None -> error parser Expected_expression
1629
+
in
1630
+
let right = parse_assignment_expression parser in
1631
+
expect parser Token.RParen;
1632
+
let saved_in_iteration = parser.in_iteration in
1633
+
parser.in_iteration <- true;
1634
+
let body = parse_statement parser in
1635
+
parser.in_iteration <- saved_in_iteration;
1636
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:body.Ast.loc.end_ () in
1637
+
Ast.mk_stmt ~loc (Ast.For_of { left; right; body; await = is_await })
1638
+
1639
+
| _ ->
1640
+
expect parser Token.Semicolon;
1641
+
let test =
1642
+
if current_token parser = Token.Semicolon then None
1643
+
else Some (parse_expression parser)
1644
+
in
1645
+
expect parser Token.Semicolon;
1646
+
let update =
1647
+
if current_token parser = Token.RParen then None
1648
+
else Some (parse_expression parser)
1649
+
in
1650
+
expect parser Token.RParen;
1651
+
let saved_in_iteration = parser.in_iteration in
1652
+
parser.in_iteration <- true;
1653
+
let body = parse_statement parser in
1654
+
parser.in_iteration <- saved_in_iteration;
1655
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:body.Ast.loc.end_ () in
1656
+
Ast.mk_stmt ~loc (Ast.For { init; test; update; body })
1657
+
1658
+
and parse_try_statement parser : Ast.statement =
1659
+
let start_loc = current_loc parser in
1660
+
expect parser (Token.Keyword Token.Kw_try);
1661
+
let block = parse_block_statement parser in
1662
+
let handler =
1663
+
if current_token parser = Token.Keyword Token.Kw_catch then begin
1664
+
let catch_loc = current_loc parser in
1665
+
advance parser;
1666
+
let catch_param =
1667
+
if current_token parser = Token.LParen then begin
1668
+
advance parser;
1669
+
let p = parse_binding_pattern parser in
1670
+
expect parser Token.RParen;
1671
+
Some p
1672
+
end else
1673
+
None
1674
+
in
1675
+
let catch_body = parse_block_statement parser in
1676
+
Some { Ast.catch_param; catch_body; catch_loc }
1677
+
end else
1678
+
None
1679
+
in
1680
+
let finalizer =
1681
+
if current_token parser = Token.Keyword Token.Kw_finally then begin
1682
+
advance parser;
1683
+
Some (parse_block_statement parser)
1684
+
end else
1685
+
None
1686
+
in
1687
+
let end_loc = match finalizer with
1688
+
| Some s -> s.Ast.loc
1689
+
| None -> match handler with Some h -> h.Ast.catch_body.Ast.loc | None -> block.Ast.loc
1690
+
in
1691
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
1692
+
Ast.mk_stmt ~loc (Ast.Try { block; handler; finalizer })
1693
+
1694
+
and parse_function_declaration parser : Ast.function_declaration =
1695
+
let start_loc = current_loc parser in
1696
+
expect parser (Token.Keyword Token.Kw_function);
1697
+
let is_generator = current_token parser = Token.Star in
1698
+
if is_generator then advance parser;
1699
+
let fd_id = parse_identifier parser in
1700
+
let fn = parse_function_body parser ~is_generator ~is_async:false in
1701
+
let fd_loc = Source.mk_loc ~start:start_loc.start ~end_:fn.fn_body.body_loc.end_ () in
1702
+
{
1703
+
Ast.fd_id;
1704
+
fd_params = fn.fn_params;
1705
+
fd_body = fn.fn_body;
1706
+
fd_generator = is_generator;
1707
+
fd_async = false;
1708
+
fd_loc;
1709
+
}
1710
+
1711
+
and parse_statement parser : Ast.statement =
1712
+
let start_loc = current_loc parser in
1713
+
match current_token parser with
1714
+
| Token.LBrace ->
1715
+
parse_block_statement parser
1716
+
1717
+
| Token.Semicolon ->
1718
+
advance parser;
1719
+
Ast.mk_stmt ~loc:start_loc Ast.Empty
1720
+
1721
+
| Token.Keyword Token.Kw_var ->
1722
+
advance parser;
1723
+
let decl = parse_variable_declaration parser Ast.Var in
1724
+
expect_semicolon parser;
1725
+
Ast.mk_stmt ~loc:decl.var_loc (Ast.Variable decl)
1726
+
1727
+
| Token.Keyword Token.Kw_let ->
1728
+
advance parser;
1729
+
let decl = parse_variable_declaration parser Ast.Let in
1730
+
expect_semicolon parser;
1731
+
Ast.mk_stmt ~loc:decl.var_loc (Ast.Variable decl)
1732
+
1733
+
| Token.Keyword Token.Kw_const ->
1734
+
advance parser;
1735
+
let decl = parse_variable_declaration parser Ast.Const in
1736
+
expect_semicolon parser;
1737
+
Ast.mk_stmt ~loc:decl.var_loc (Ast.Variable decl)
1738
+
1739
+
| Token.Identifier "using" ->
1740
+
(* Check if this is 'using x' declaration or 'using' as identifier *)
1741
+
let next = Lexer.peek parser.lexer in
1742
+
(match next.tok with
1743
+
| Token.Identifier _ | Token.LBracket | Token.LBrace
1744
+
when not next.preceded_by_newline ->
1745
+
(* 'using' declaration *)
1746
+
advance parser;
1747
+
let decl = parse_variable_declaration parser Ast.Using in
1748
+
expect_semicolon parser;
1749
+
Ast.mk_stmt ~loc:decl.var_loc (Ast.Variable decl)
1750
+
| _ ->
1751
+
(* 'using' as an identifier in expression *)
1752
+
let expr = parse_expression parser in
1753
+
expect_semicolon parser;
1754
+
Ast.mk_stmt ~loc:expr.Ast.loc (Ast.Expression expr))
1755
+
1756
+
| Token.Keyword Token.Kw_await when
1757
+
(let next = Lexer.peek parser.lexer in
1758
+
next.tok = Token.Identifier "using" && not next.preceded_by_newline) ->
1759
+
(* 'await using' declaration *)
1760
+
advance parser; (* skip 'await' *)
1761
+
advance parser; (* skip 'using' *)
1762
+
let decl = parse_variable_declaration parser Ast.Await_using in
1763
+
expect_semicolon parser;
1764
+
Ast.mk_stmt ~loc:decl.var_loc (Ast.Variable decl)
1765
+
1766
+
| Token.Keyword Token.Kw_if ->
1767
+
parse_if_statement parser
1768
+
1769
+
| Token.Keyword Token.Kw_while ->
1770
+
parse_while_statement parser
1771
+
1772
+
| Token.Keyword Token.Kw_for ->
1773
+
parse_for_statement parser
1774
+
1775
+
| Token.Keyword Token.Kw_do ->
1776
+
advance parser;
1777
+
let saved_in_iteration = parser.in_iteration in
1778
+
parser.in_iteration <- true;
1779
+
let body = parse_statement parser in
1780
+
parser.in_iteration <- saved_in_iteration;
1781
+
expect parser (Token.Keyword Token.Kw_while);
1782
+
expect parser Token.LParen;
1783
+
let test = parse_expression parser in
1784
+
expect parser Token.RParen;
1785
+
expect_semicolon parser;
1786
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:test.Ast.loc.end_ () in
1787
+
Ast.mk_stmt ~loc (Ast.Do_while { body; test })
1788
+
1789
+
| Token.Keyword Token.Kw_switch ->
1790
+
advance parser;
1791
+
expect parser Token.LParen;
1792
+
let discriminant = parse_expression parser in
1793
+
expect parser Token.RParen;
1794
+
expect parser Token.LBrace;
1795
+
let saved_in_switch = parser.in_switch in
1796
+
parser.in_switch <- true;
1797
+
let cases = ref [] in
1798
+
while current_token parser <> Token.RBrace && not (is_at_end parser) do
1799
+
let case_loc = current_loc parser in
1800
+
let case_test =
1801
+
match current_token parser with
1802
+
| Token.Keyword Token.Kw_case ->
1803
+
advance parser;
1804
+
let e = parse_expression parser in
1805
+
expect parser Token.Colon;
1806
+
Some e
1807
+
| Token.Keyword Token.Kw_default ->
1808
+
advance parser;
1809
+
expect parser Token.Colon;
1810
+
None
1811
+
| _ -> error parser (Expected_token ("case or default", current_token parser))
1812
+
in
1813
+
let consequent = ref [] in
1814
+
while current_token parser <> Token.Keyword Token.Kw_case &&
1815
+
current_token parser <> Token.Keyword Token.Kw_default &&
1816
+
current_token parser <> Token.RBrace &&
1817
+
not (is_at_end parser) do
1818
+
consequent := parse_statement parser :: !consequent
1819
+
done;
1820
+
cases := { Ast.case_test; case_consequent = List.rev !consequent; case_loc } :: !cases
1821
+
done;
1822
+
parser.in_switch <- saved_in_switch;
1823
+
let end_loc = current_loc parser in
1824
+
expect parser Token.RBrace;
1825
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
1826
+
Ast.mk_stmt ~loc (Ast.Switch { discriminant; cases = List.rev !cases })
1827
+
1828
+
| Token.Keyword Token.Kw_try ->
1829
+
parse_try_statement parser
1830
+
1831
+
| Token.Keyword Token.Kw_with ->
1832
+
advance parser;
1833
+
if parser.strict_mode then
1834
+
error parser Strict_mode_with;
1835
+
expect parser Token.LParen;
1836
+
let object_ = parse_expression parser in
1837
+
expect parser Token.RParen;
1838
+
let body = parse_statement parser in
1839
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:body.Ast.loc.end_ () in
1840
+
Ast.mk_stmt ~loc (Ast.With { object_; body })
1841
+
1842
+
| Token.Keyword Token.Kw_break ->
1843
+
advance parser;
1844
+
let label =
1845
+
if not parser.current.preceded_by_newline then
1846
+
match current_token parser with
1847
+
| Token.Identifier name ->
1848
+
let l = { Ast.name; loc = current_loc parser } in
1849
+
advance parser;
1850
+
Some l
1851
+
| _ -> None
1852
+
else None
1853
+
in
1854
+
if not parser.in_iteration && not parser.in_switch && label = None then
1855
+
error parser Illegal_break;
1856
+
expect_semicolon parser;
1857
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:start_loc.end_ () in
1858
+
Ast.mk_stmt ~loc (Ast.Break label)
1859
+
1860
+
| Token.Keyword Token.Kw_continue ->
1861
+
advance parser;
1862
+
let label =
1863
+
if not parser.current.preceded_by_newline then
1864
+
match current_token parser with
1865
+
| Token.Identifier name ->
1866
+
let l = { Ast.name; loc = current_loc parser } in
1867
+
advance parser;
1868
+
Some l
1869
+
| _ -> None
1870
+
else None
1871
+
in
1872
+
if not parser.in_iteration then
1873
+
error parser Illegal_continue;
1874
+
expect_semicolon parser;
1875
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:start_loc.end_ () in
1876
+
Ast.mk_stmt ~loc (Ast.Continue label)
1877
+
1878
+
| Token.Keyword Token.Kw_return ->
1879
+
if not parser.in_function then
1880
+
error parser Illegal_return;
1881
+
advance parser;
1882
+
let argument =
1883
+
if not parser.current.preceded_by_newline && can_start_expression parser then
1884
+
Some (parse_expression parser)
1885
+
else
1886
+
None
1887
+
in
1888
+
expect_semicolon parser;
1889
+
let end_loc = match argument with Some e -> e.loc | None -> start_loc in
1890
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
1891
+
Ast.mk_stmt ~loc (Ast.Return argument)
1892
+
1893
+
| Token.Keyword Token.Kw_throw ->
1894
+
advance parser;
1895
+
if parser.current.preceded_by_newline then
1896
+
error parser (Expected_token ("expression", Token.Eof));
1897
+
let argument = parse_expression parser in
1898
+
expect_semicolon parser;
1899
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:argument.Ast.loc.end_ () in
1900
+
Ast.mk_stmt ~loc (Ast.Throw argument)
1901
+
1902
+
| Token.Keyword Token.Kw_function ->
1903
+
let fn = parse_function_declaration parser in
1904
+
Ast.mk_stmt ~loc:fn.fd_loc (Ast.Function fn)
1905
+
1906
+
| Token.Identifier "async" when (Lexer.peek parser.lexer).tok = Token.Keyword Token.Kw_function ->
1907
+
let start_loc = current_loc parser in
1908
+
advance parser; (* consume async *)
1909
+
expect parser (Token.Keyword Token.Kw_function);
1910
+
let is_generator = current_token parser = Token.Star in
1911
+
if is_generator then advance parser;
1912
+
let fd_id = parse_identifier parser in
1913
+
let fn = parse_function_body parser ~is_generator ~is_async:true in
1914
+
let fd_loc = Source.mk_loc ~start:start_loc.start ~end_:fn.fn_body.body_loc.end_ () in
1915
+
let fd = {
1916
+
Ast.fd_id;
1917
+
fd_params = fn.fn_params;
1918
+
fd_body = fn.fn_body;
1919
+
fd_generator = is_generator;
1920
+
fd_async = true;
1921
+
fd_loc;
1922
+
} in
1923
+
Ast.mk_stmt ~loc:fd.fd_loc (Ast.Function fd)
1924
+
1925
+
| Token.Keyword Token.Kw_debugger ->
1926
+
advance parser;
1927
+
expect_semicolon parser;
1928
+
Ast.mk_stmt ~loc:start_loc Ast.Debugger
1929
+
1930
+
| Token.Identifier name when (Lexer.peek parser.lexer).tok = Token.Colon ->
1931
+
advance parser;
1932
+
advance parser;
1933
+
if List.mem name parser.labels then
1934
+
error parser (Duplicate_label name);
1935
+
parser.labels <- name :: parser.labels;
1936
+
let body = parse_statement parser in
1937
+
parser.labels <- List.tl parser.labels;
1938
+
let loc = Source.mk_loc ~start:start_loc.start ~end_:body.Ast.loc.end_ () in
1939
+
let label = { Ast.name; loc = start_loc } in
1940
+
Ast.mk_stmt ~loc (Ast.Labeled { label; body })
1941
+
1942
+
| _ ->
1943
+
let expr = parse_expression parser in
1944
+
expect_semicolon parser;
1945
+
Ast.mk_stmt ~loc:expr.Ast.loc (Ast.Expression expr)
1946
+
1947
+
(** Parse a program *)
1948
+
and parse_import_declaration parser : Ast.module_declaration =
1949
+
let start_loc = current_loc parser in
1950
+
advance parser; (* consume 'import' *)
1951
+
(* Check for import "module" (no specifiers) *)
1952
+
match current_token parser with
1953
+
| Token.String (source, _) ->
1954
+
advance parser;
1955
+
skip_import_attributes parser;
1956
+
expect_semicolon parser;
1957
+
let end_loc = current_loc parser in
1958
+
let import_loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
1959
+
Ast.Import { specifiers = []; source; import_loc }
1960
+
| _ ->
1961
+
let specifiers = ref [] in
1962
+
(* Check for default import *)
1963
+
(match current_token parser with
1964
+
| Token.Identifier name ->
1965
+
let loc = current_loc parser in
1966
+
advance parser;
1967
+
specifiers := Ast.Import_default { Ast.name; loc } :: !specifiers;
1968
+
(* Check for comma (more specifiers follow) *)
1969
+
if current_token parser = Token.Comma then advance parser
1970
+
| _ -> ());
1971
+
(* Check for namespace import or named imports *)
1972
+
(match current_token parser with
1973
+
| Token.Star ->
1974
+
advance parser;
1975
+
expect_keyword parser Token.Kw_as;
1976
+
let ident = parse_identifier parser in
1977
+
specifiers := Ast.Import_namespace ident :: !specifiers
1978
+
| Token.LBrace ->
1979
+
advance parser;
1980
+
(* Helper to parse identifier, keyword, or string literal as module export name *)
1981
+
let parse_module_export_name () =
1982
+
match current_token parser with
1983
+
| Token.String (s, _) ->
1984
+
let loc = current_loc parser in
1985
+
advance parser;
1986
+
{ Ast.name = s; loc }
1987
+
| Token.Keyword kw ->
1988
+
(* Keywords like 'default' can be used as imported names *)
1989
+
let name = Token.keyword_to_string kw in
1990
+
let loc = current_loc parser in
1991
+
advance parser;
1992
+
{ Ast.name = name; loc }
1993
+
| _ -> parse_identifier parser
1994
+
in
1995
+
while current_token parser <> Token.RBrace && not (is_at_end parser) do
1996
+
let imported = parse_module_export_name () in
1997
+
let local =
1998
+
match current_token parser with
1999
+
| Token.Keyword Token.Kw_as | Token.Identifier "as" ->
2000
+
advance parser;
2001
+
parse_identifier parser (* local must be identifier *)
2002
+
| _ -> imported
2003
+
in
2004
+
specifiers := Ast.Import_named { imported; local } :: !specifiers;
2005
+
if current_token parser <> Token.RBrace then expect parser Token.Comma
2006
+
done;
2007
+
expect parser Token.RBrace
2008
+
| _ -> ());
2009
+
(* Expect 'from' keyword *)
2010
+
expect_keyword parser Token.Kw_from;
2011
+
(* Parse module source *)
2012
+
let source = match current_token parser with
2013
+
| Token.String (s, _) -> advance parser; s
2014
+
| _ -> error parser (Expected_token ("string", current_token parser))
2015
+
in
2016
+
skip_import_attributes parser;
2017
+
expect_semicolon parser;
2018
+
let end_loc = current_loc parser in
2019
+
let import_loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
2020
+
Ast.Import { specifiers = List.rev !specifiers; source; import_loc }
2021
+
2022
+
and expect_keyword parser kw =
2023
+
match current_token parser with
2024
+
| Token.Keyword k when k = kw -> advance parser
2025
+
| Token.Identifier name when Token.keyword_of_string name = Some kw -> advance parser
2026
+
| Token.Identifier name when Token.contextual_keyword_of_string name = Some kw -> advance parser
2027
+
| tok -> error parser (Expected_token (Token.keyword_to_string kw, tok))
2028
+
2029
+
(** Skip import attributes: with { key: "value", ... } *)
2030
+
and skip_import_attributes parser =
2031
+
match current_token parser with
2032
+
| Token.Keyword Token.Kw_with | Token.Identifier "with" ->
2033
+
advance parser; (* consume 'with' *)
2034
+
expect parser Token.LBrace;
2035
+
while current_token parser <> Token.RBrace && not (is_at_end parser) do
2036
+
(* Parse attribute key: IdentifierName (any identifier/keyword) or string *)
2037
+
(match current_token parser with
2038
+
| Token.String _ | Token.Identifier _ | Token.Keyword _ ->
2039
+
advance parser
2040
+
| _ -> error parser Expected_identifier);
2041
+
expect parser Token.Colon;
2042
+
(* Parse attribute value: must be string *)
2043
+
(match current_token parser with
2044
+
| Token.String _ -> advance parser
2045
+
| _ -> error parser (Expected_token ("string", current_token parser)));
2046
+
if current_token parser <> Token.RBrace then
2047
+
expect parser Token.Comma
2048
+
done;
2049
+
expect parser Token.RBrace
2050
+
| _ -> ()
2051
+
2052
+
and parse_export_declaration parser : Ast.module_declaration =
2053
+
let start_loc = current_loc parser in
2054
+
advance parser; (* consume 'export' *)
2055
+
match current_token parser with
2056
+
| Token.Keyword Token.Kw_default ->
2057
+
(* export default ... *)
2058
+
advance parser;
2059
+
let declaration =
2060
+
match current_token parser with
2061
+
| Token.Keyword Token.Kw_function ->
2062
+
let start = current_loc parser in
2063
+
advance parser;
2064
+
let is_generator = current_token parser = Token.Star in
2065
+
if is_generator then advance parser;
2066
+
let fd_id =
2067
+
match current_token parser with
2068
+
| Token.Identifier _ -> parse_identifier parser
2069
+
| _ -> { Ast.name = "default"; loc = start_loc }
2070
+
in
2071
+
let fn = parse_function_body parser ~is_generator ~is_async:false in
2072
+
let fd_loc = Source.mk_loc ~start:start.start ~end_:(current_loc parser).end_ () in
2073
+
Ast.Export_function { fd_id; fd_params = fn.fn_params; fd_body = fn.fn_body;
2074
+
fd_generator = is_generator; fd_async = false; fd_loc }
2075
+
| Token.Keyword Token.Kw_class ->
2076
+
let start = current_loc parser in
2077
+
advance parser;
2078
+
let cd_id =
2079
+
match current_token parser with
2080
+
| Token.Identifier _ -> parse_identifier parser
2081
+
| _ -> { Ast.name = "default"; loc = start_loc }
2082
+
in
2083
+
let cd_super =
2084
+
if current_token parser = Token.Keyword Token.Kw_extends then begin
2085
+
advance parser;
2086
+
Some (parse_call_expression parser)
2087
+
end else None
2088
+
in
2089
+
let cd_body = parse_class_body parser in
2090
+
let cd_loc = Source.mk_loc ~start:start.start ~end_:(current_loc parser).end_ () in
2091
+
Ast.Export_class { cd_id; cd_super; cd_body; cd_loc }
2092
+
| Token.Identifier "async" when (Lexer.peek parser.lexer).tok = Token.Keyword Token.Kw_function ->
2093
+
let start = current_loc parser in
2094
+
advance parser; (* async *)
2095
+
advance parser; (* function *)
2096
+
let is_generator = current_token parser = Token.Star in
2097
+
if is_generator then advance parser;
2098
+
let fd_id =
2099
+
match current_token parser with
2100
+
| Token.Identifier _ -> parse_identifier parser
2101
+
| _ -> { Ast.name = "default"; loc = start_loc }
2102
+
in
2103
+
let fn = parse_function_body parser ~is_generator ~is_async:true in
2104
+
let fd_loc = Source.mk_loc ~start:start.start ~end_:(current_loc parser).end_ () in
2105
+
Ast.Export_function { fd_id; fd_params = fn.fn_params; fd_body = fn.fn_body;
2106
+
fd_generator = is_generator; fd_async = true; fd_loc }
2107
+
| _ ->
2108
+
let expr = parse_assignment_expression parser in
2109
+
expect_semicolon parser;
2110
+
Ast.Export_expression expr
2111
+
in
2112
+
let end_loc = current_loc parser in
2113
+
let export_loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
2114
+
Ast.Export_default { declaration; export_loc }
2115
+
| Token.Star ->
2116
+
(* export * from "module" or export * as name from "module" *)
2117
+
advance parser;
2118
+
let exported =
2119
+
match current_token parser with
2120
+
| Token.Keyword Token.Kw_as | Token.Identifier "as" ->
2121
+
advance parser;
2122
+
(* Export name can be any IdentifierName (including keywords) or string *)
2123
+
let ident =
2124
+
match current_token parser with
2125
+
| Token.String (s, _) ->
2126
+
let loc = current_loc parser in
2127
+
advance parser;
2128
+
{ Ast.name = s; loc }
2129
+
| Token.Keyword kw ->
2130
+
let name = Token.keyword_to_string kw in
2131
+
let loc = current_loc parser in
2132
+
advance parser;
2133
+
{ Ast.name = name; loc }
2134
+
| _ -> parse_identifier parser
2135
+
in
2136
+
Some ident
2137
+
| _ -> None
2138
+
in
2139
+
expect_keyword parser Token.Kw_from;
2140
+
let source = match current_token parser with
2141
+
| Token.String (s, _) -> advance parser; s
2142
+
| _ -> error parser (Expected_token ("string", current_token parser))
2143
+
in
2144
+
skip_import_attributes parser;
2145
+
expect_semicolon parser;
2146
+
let end_loc = current_loc parser in
2147
+
let export_loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
2148
+
Ast.Export_all { exported; source; export_loc }
2149
+
| Token.LBrace ->
2150
+
(* export { ... } or export { ... } from "module" *)
2151
+
advance parser;
2152
+
let specifiers = ref [] in
2153
+
(* Helper to parse identifier, keyword, or string literal as module export name *)
2154
+
let parse_module_export_name () =
2155
+
match current_token parser with
2156
+
| Token.String (s, _) ->
2157
+
let loc = current_loc parser in
2158
+
advance parser;
2159
+
{ Ast.name = s; loc }
2160
+
| Token.Keyword kw ->
2161
+
(* Keywords like 'default' can be used as export names *)
2162
+
let name = Token.keyword_to_string kw in
2163
+
let loc = current_loc parser in
2164
+
advance parser;
2165
+
{ Ast.name = name; loc }
2166
+
| _ -> parse_identifier parser
2167
+
in
2168
+
while current_token parser <> Token.RBrace && not (is_at_end parser) do
2169
+
let local = parse_module_export_name () in
2170
+
let exported =
2171
+
match current_token parser with
2172
+
| Token.Keyword Token.Kw_as | Token.Identifier "as" ->
2173
+
advance parser;
2174
+
parse_module_export_name ()
2175
+
| _ -> local
2176
+
in
2177
+
specifiers := { Ast.exported; local } :: !specifiers;
2178
+
if current_token parser <> Token.RBrace then expect parser Token.Comma
2179
+
done;
2180
+
expect parser Token.RBrace;
2181
+
let source =
2182
+
match current_token parser with
2183
+
| Token.Keyword Token.Kw_from | Token.Identifier "from" ->
2184
+
advance parser;
2185
+
(match current_token parser with
2186
+
| Token.String (s, _) ->
2187
+
advance parser;
2188
+
skip_import_attributes parser;
2189
+
Some s
2190
+
| _ -> error parser (Expected_token ("string", current_token parser)))
2191
+
| _ -> None
2192
+
in
2193
+
expect_semicolon parser;
2194
+
let end_loc = current_loc parser in
2195
+
let export_loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
2196
+
Ast.Export_named { specifiers = List.rev !specifiers; source; declaration = None; export_loc }
2197
+
| Token.Keyword Token.Kw_var ->
2198
+
(* export var ... *)
2199
+
advance parser;
2200
+
let decl = parse_variable_declaration parser Ast.Var in
2201
+
expect_semicolon parser;
2202
+
let end_loc = current_loc parser in
2203
+
let export_loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
2204
+
Ast.Export_named { specifiers = []; source = None;
2205
+
declaration = Some (Ast.mk_stmt ~loc:decl.var_loc (Ast.Variable decl));
2206
+
export_loc }
2207
+
| Token.Keyword Token.Kw_let ->
2208
+
(* export let ... *)
2209
+
advance parser;
2210
+
let decl = parse_variable_declaration parser Ast.Let in
2211
+
expect_semicolon parser;
2212
+
let end_loc = current_loc parser in
2213
+
let export_loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
2214
+
Ast.Export_named { specifiers = []; source = None;
2215
+
declaration = Some (Ast.mk_stmt ~loc:decl.var_loc (Ast.Variable decl));
2216
+
export_loc }
2217
+
| Token.Keyword Token.Kw_const ->
2218
+
(* export const ... *)
2219
+
advance parser;
2220
+
let decl = parse_variable_declaration parser Ast.Const in
2221
+
expect_semicolon parser;
2222
+
let end_loc = current_loc parser in
2223
+
let export_loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
2224
+
Ast.Export_named { specifiers = []; source = None;
2225
+
declaration = Some (Ast.mk_stmt ~loc:decl.var_loc (Ast.Variable decl));
2226
+
export_loc }
2227
+
| Token.Keyword Token.Kw_function ->
2228
+
(* export function ... *)
2229
+
let start = current_loc parser in
2230
+
advance parser;
2231
+
let is_generator = current_token parser = Token.Star in
2232
+
if is_generator then advance parser;
2233
+
let fd_id = parse_identifier parser in
2234
+
let fn = parse_function_body parser ~is_generator ~is_async:false in
2235
+
let fd_loc = Source.mk_loc ~start:start.start ~end_:(current_loc parser).end_ () in
2236
+
let fd = { Ast.fd_id; fd_params = fn.fn_params; fd_body = fn.fn_body;
2237
+
fd_generator = is_generator; fd_async = false; fd_loc } in
2238
+
let export_loc = Source.mk_loc ~start:start_loc.start ~end_:fd_loc.end_ () in
2239
+
Ast.Export_named { specifiers = []; source = None;
2240
+
declaration = Some (Ast.mk_stmt ~loc:fd_loc (Ast.Function fd));
2241
+
export_loc }
2242
+
| Token.Keyword Token.Kw_class ->
2243
+
(* export class ... *)
2244
+
let start = current_loc parser in
2245
+
advance parser;
2246
+
let cd_id = parse_identifier parser in
2247
+
let cd_super =
2248
+
if current_token parser = Token.Keyword Token.Kw_extends then begin
2249
+
advance parser;
2250
+
Some (parse_call_expression parser)
2251
+
end else None
2252
+
in
2253
+
let cd_body = parse_class_body parser in
2254
+
let cd_loc = Source.mk_loc ~start:start.start ~end_:(current_loc parser).end_ () in
2255
+
let cd = { Ast.cd_id; cd_super; cd_body; cd_loc } in
2256
+
let export_loc = Source.mk_loc ~start:start_loc.start ~end_:cd_loc.end_ () in
2257
+
Ast.Export_named { specifiers = []; source = None;
2258
+
declaration = Some (Ast.mk_stmt ~loc:cd_loc (Ast.Class cd));
2259
+
export_loc }
2260
+
| Token.Identifier "async" when (Lexer.peek parser.lexer).tok = Token.Keyword Token.Kw_function ->
2261
+
(* export async function ... *)
2262
+
let start = current_loc parser in
2263
+
advance parser; (* async *)
2264
+
advance parser; (* function *)
2265
+
let is_generator = current_token parser = Token.Star in
2266
+
if is_generator then advance parser;
2267
+
let fd_id = parse_identifier parser in
2268
+
let fn = parse_function_body parser ~is_generator ~is_async:true in
2269
+
let fd_loc = Source.mk_loc ~start:start.start ~end_:(current_loc parser).end_ () in
2270
+
let fd = { Ast.fd_id; fd_params = fn.fn_params; fd_body = fn.fn_body;
2271
+
fd_generator = is_generator; fd_async = true; fd_loc } in
2272
+
let export_loc = Source.mk_loc ~start:start_loc.start ~end_:fd_loc.end_ () in
2273
+
Ast.Export_named { specifiers = []; source = None;
2274
+
declaration = Some (Ast.mk_stmt ~loc:fd_loc (Ast.Function fd));
2275
+
export_loc }
2276
+
| _ -> error parser Expected_expression
2277
+
2278
+
let parse_program ?(is_module=false) parser =
2279
+
let start_loc = current_loc parser in
2280
+
let items = ref [] in
2281
+
let directives = ref [] in
2282
+
let parsing_directives = ref true in
2283
+
let detected_module = ref is_module in
2284
+
(* Modules are always in strict mode *)
2285
+
if is_module then parser.strict_mode <- true;
2286
+
while not (is_at_end parser) do
2287
+
let item =
2288
+
match current_token parser with
2289
+
| Token.Keyword Token.Kw_import ->
2290
+
(* Check if this is import declaration or dynamic import expression *)
2291
+
let next = Lexer.peek parser.lexer in
2292
+
if next.tok = Token.Dot || next.tok = Token.LParen then begin
2293
+
(* import.meta or import() expression *)
2294
+
let s = parse_statement parser in
2295
+
parsing_directives := false;
2296
+
Ast.Stmt s
2297
+
end else begin
2298
+
detected_module := true;
2299
+
parser.strict_mode <- true; (* Modules are always strict mode *)
2300
+
parsing_directives := false;
2301
+
Ast.Module_decl (parse_import_declaration parser)
2302
+
end
2303
+
| Token.Keyword Token.Kw_export ->
2304
+
detected_module := true;
2305
+
parser.strict_mode <- true; (* Modules are always strict mode *)
2306
+
parsing_directives := false;
2307
+
Ast.Module_decl (parse_export_declaration parser)
2308
+
| _ ->
2309
+
let s = parse_statement parser in
2310
+
if !parsing_directives then begin
2311
+
match s.Ast.stmt with
2312
+
| Ast.Expression { Ast.expr = Ast.Literal (Ast.Lit_string str); _ } ->
2313
+
directives := str :: !directives;
2314
+
if str = "use strict" then parser.strict_mode <- true
2315
+
| _ -> parsing_directives := false
2316
+
end;
2317
+
Ast.Stmt s
2318
+
in
2319
+
items := item :: !items
2320
+
done;
2321
+
let end_loc = current_loc parser in
2322
+
let program_loc = Source.mk_loc ~start:start_loc.start ~end_:end_loc.end_ () in
2323
+
{
2324
+
Ast.source_type = if !detected_module then Ast.Module else Ast.Script;
2325
+
body = List.rev !items;
2326
+
directives = List.rev !directives;
2327
+
program_loc;
2328
+
}
2329
+
2330
+
(** Error formatting *)
2331
+
let pp_error fmt = function
2332
+
| Unexpected_token tok -> Format.fprintf fmt "Unexpected token: %s" (Token.show tok)
2333
+
| Expected_token (expected, got) -> Format.fprintf fmt "Expected %s, got %s" expected (Token.show got)
2334
+
| Expected_identifier -> Format.fprintf fmt "Expected identifier"
2335
+
| Expected_expression -> Format.fprintf fmt "Expected expression"
2336
+
| Expected_statement -> Format.fprintf fmt "Expected statement"
2337
+
| Invalid_assignment_target -> Format.fprintf fmt "Invalid assignment target"
2338
+
| Duplicate_label s -> Format.fprintf fmt "Duplicate label: %s" s
2339
+
| Illegal_break -> Format.fprintf fmt "Illegal break statement"
2340
+
| Illegal_continue -> Format.fprintf fmt "Illegal continue statement"
2341
+
| Illegal_return -> Format.fprintf fmt "Illegal return statement"
2342
+
| Strict_mode_with -> Format.fprintf fmt "'with' statement not allowed in strict mode"
2343
+
| Strict_mode_octal -> Format.fprintf fmt "Octal literals not allowed in strict mode"
2344
+
| Invalid_destructuring -> Format.fprintf fmt "Invalid destructuring pattern"
2345
+
2346
+
let show_error err = Format.asprintf "%a" pp_error err
+34
lib/quickjs/parser/parser.mli
+34
lib/quickjs/parser/parser.mli
···
1
+
(** JavaScript Parser.
2
+
3
+
A recursive-descent parser for ECMAScript 2024. *)
4
+
5
+
(** Parse errors *)
6
+
type error =
7
+
| Unexpected_token of Token.t
8
+
| Expected_token of string * Token.t
9
+
| Expected_identifier
10
+
| Expected_expression
11
+
| Expected_statement
12
+
| Invalid_assignment_target
13
+
| Duplicate_label of string
14
+
| Illegal_break
15
+
| Illegal_continue
16
+
| Illegal_return
17
+
| Strict_mode_with
18
+
| Strict_mode_octal
19
+
| Invalid_destructuring
20
+
21
+
exception Parse_error of error * Source.loc
22
+
23
+
(** Parser state *)
24
+
type t
25
+
26
+
(** Create a parser from a lexer *)
27
+
val create : Lexer.t -> t
28
+
29
+
(** Parse a complete program. Use ~is_module:true for ES modules. *)
30
+
val parse_program : ?is_module:bool -> t -> Ast.program
31
+
32
+
(** Error formatting *)
33
+
val pp_error : Format.formatter -> error -> unit
34
+
val show_error : error -> string
+2
lib/quickjs/quickjs.ml
+2
lib/quickjs/quickjs.ml
+220
lib/quickjs/runtime/context.ml
+220
lib/quickjs/runtime/context.ml
···
1
+
(** QuickJS Execution Context.
2
+
3
+
The context holds the global environment and execution state. *)
4
+
5
+
open Value
6
+
7
+
(** Atom table for string interning *)
8
+
module AtomTable = struct
9
+
type t = {
10
+
mutable strings : (string, int) Hashtbl.t;
11
+
mutable atoms : (int, string) Hashtbl.t;
12
+
mutable next_id : int;
13
+
}
14
+
15
+
let create () = {
16
+
strings = Hashtbl.create 256;
17
+
atoms = Hashtbl.create 256;
18
+
next_id = 1;
19
+
}
20
+
21
+
let intern t s =
22
+
match Hashtbl.find_opt t.strings s with
23
+
| Some id -> id
24
+
| None ->
25
+
let id = t.next_id in
26
+
t.next_id <- t.next_id + 1;
27
+
Hashtbl.add t.strings s id;
28
+
Hashtbl.add t.atoms id s;
29
+
id
30
+
31
+
let get_string t id =
32
+
Hashtbl.find_opt t.atoms id
33
+
end
34
+
35
+
(** Stack frame for function calls *)
36
+
type stack_frame = {
37
+
func : Quickjs_compiler.Bytecode.function_bytecode;
38
+
mutable pc : int; (* Program counter *)
39
+
mutable stack : value list; (* Operand stack *)
40
+
locals : value array; (* Local variables *)
41
+
args : value array; (* Arguments *)
42
+
var_refs : var_ref array; (* Closure variables *)
43
+
this_val : value; (* this binding *)
44
+
new_target : value; (* new.target *)
45
+
mutable catch_stack : catch_info list; (* Exception handlers *)
46
+
}
47
+
48
+
(** Catch block info *)
49
+
and catch_info = {
50
+
catch_pc : int;
51
+
stack_len : int;
52
+
}
53
+
54
+
(** Runtime context *)
55
+
type t = {
56
+
atoms : AtomTable.t;
57
+
mutable global : js_object;
58
+
mutable frames : stack_frame list;
59
+
mutable exception_val : value option;
60
+
mutable strict_mode : bool;
61
+
}
62
+
63
+
(** Create a new context *)
64
+
let create () =
65
+
let atoms = AtomTable.create () in
66
+
let global = make_object () in
67
+
68
+
(* Add standard global properties *)
69
+
let add_global name value =
70
+
ignore (set_property global name value)
71
+
in
72
+
73
+
add_global "undefined" Undefined;
74
+
add_global "NaN" (Float Float.nan);
75
+
add_global "Infinity" (Float Float.infinity);
76
+
77
+
{ atoms; global; frames = []; exception_val = None; strict_mode = false }
78
+
79
+
(** Intern a string as an atom *)
80
+
let intern ctx s = AtomTable.intern ctx.atoms s
81
+
82
+
(** Get string from atom *)
83
+
let atom_to_string ctx id = AtomTable.get_string ctx.atoms id
84
+
85
+
(** Get current stack frame *)
86
+
let current_frame ctx =
87
+
match ctx.frames with
88
+
| f :: _ -> Some f
89
+
| [] -> None
90
+
91
+
(** Push a new stack frame *)
92
+
let push_frame ctx frame =
93
+
ctx.frames <- frame :: ctx.frames
94
+
95
+
(** Pop the current stack frame *)
96
+
let pop_frame ctx =
97
+
match ctx.frames with
98
+
| _ :: rest -> ctx.frames <- rest
99
+
| [] -> ()
100
+
101
+
(** Create a new stack frame *)
102
+
let make_frame ~func ~args ~this_val ~new_target ~var_refs =
103
+
let locals = Array.make func.Quickjs_compiler.Bytecode.var_count Undefined in
104
+
{
105
+
func;
106
+
pc = 0;
107
+
stack = [];
108
+
locals;
109
+
args;
110
+
var_refs;
111
+
this_val;
112
+
new_target;
113
+
catch_stack = [];
114
+
}
115
+
116
+
(** Push value onto operand stack *)
117
+
let push_value frame v =
118
+
frame.stack <- v :: frame.stack
119
+
120
+
(** Pop value from operand stack *)
121
+
let pop_value frame =
122
+
match frame.stack with
123
+
| v :: rest ->
124
+
frame.stack <- rest;
125
+
v
126
+
| [] -> Undefined (* Should not happen *)
127
+
128
+
(** Peek at top of stack *)
129
+
let peek_value frame =
130
+
match frame.stack with
131
+
| v :: _ -> v
132
+
| [] -> Undefined
133
+
134
+
(** Get local variable *)
135
+
let get_local frame idx =
136
+
if idx >= 0 && idx < Array.length frame.locals then
137
+
frame.locals.(idx)
138
+
else
139
+
Undefined
140
+
141
+
(** Set local variable *)
142
+
let set_local frame idx v =
143
+
if idx >= 0 && idx < Array.length frame.locals then
144
+
frame.locals.(idx) <- v
145
+
146
+
(** Get argument *)
147
+
let get_arg frame idx =
148
+
if idx >= 0 && idx < Array.length frame.args then
149
+
frame.args.(idx)
150
+
else
151
+
Undefined
152
+
153
+
(** Set argument *)
154
+
let set_arg frame idx v =
155
+
if idx >= 0 && idx < Array.length frame.args then
156
+
frame.args.(idx) <- v
157
+
158
+
(** Get closure variable *)
159
+
let get_var_ref frame idx =
160
+
if idx >= 0 && idx < Array.length frame.var_refs then
161
+
frame.var_refs.(idx).ref_value
162
+
else
163
+
Undefined
164
+
165
+
(** Set closure variable *)
166
+
let set_var_ref frame idx v =
167
+
if idx >= 0 && idx < Array.length frame.var_refs then
168
+
frame.var_refs.(idx).ref_value <- v
169
+
170
+
(** Throw an exception *)
171
+
let throw ctx v =
172
+
ctx.exception_val <- Some v
173
+
174
+
(** Get and clear exception *)
175
+
let get_exception ctx =
176
+
let e = ctx.exception_val in
177
+
ctx.exception_val <- None;
178
+
e
179
+
180
+
(** Check if there's a pending exception *)
181
+
let has_exception ctx =
182
+
Option.is_some ctx.exception_val
183
+
184
+
(** Create a type error *)
185
+
let type_error ctx msg =
186
+
let err = make_object ~class_id:Class_error
187
+
~data:(Data_error { message = msg; name = "TypeError"; stack = "" }) () in
188
+
throw ctx (Object err)
189
+
190
+
(** Create a reference error *)
191
+
let reference_error ctx msg =
192
+
let err = make_object ~class_id:Class_error
193
+
~data:(Data_error { message = msg; name = "ReferenceError"; stack = "" }) () in
194
+
throw ctx (Object err)
195
+
196
+
(** Create a syntax error *)
197
+
let syntax_error ctx msg =
198
+
let err = make_object ~class_id:Class_error
199
+
~data:(Data_error { message = msg; name = "SyntaxError"; stack = "" }) () in
200
+
throw ctx (Object err)
201
+
202
+
(** Create a range error *)
203
+
let range_error ctx msg =
204
+
let err = make_object ~class_id:Class_error
205
+
~data:(Data_error { message = msg; name = "RangeError"; stack = "" }) () in
206
+
throw ctx (Object err)
207
+
208
+
(** Get global property *)
209
+
let get_global ctx name =
210
+
match get_property ctx.global name with
211
+
| Some v -> v
212
+
| None -> Undefined
213
+
214
+
(** Set global property *)
215
+
let set_global ctx name value =
216
+
ignore (set_property ctx.global name value)
217
+
218
+
(** Define global property *)
219
+
let define_global ctx name value flags =
220
+
define_property ctx.global name value flags
+4
lib/quickjs/runtime/dune
+4
lib/quickjs/runtime/dune
+900
lib/quickjs/runtime/interpreter.ml
+900
lib/quickjs/runtime/interpreter.ml
···
1
+
(** QuickJS Bytecode Interpreter.
2
+
3
+
This module implements the bytecode execution engine. *)
4
+
5
+
open Value
6
+
open Context
7
+
module Bytecode = Quickjs_compiler.Bytecode
8
+
module Opcode = Quickjs_compiler.Opcode
9
+
10
+
(** Read unsigned 8-bit value from bytecode *)
11
+
let read_u8 bc pc =
12
+
Char.code (Bytes.get bc pc)
13
+
14
+
(** Read signed 8-bit value from bytecode *)
15
+
let read_i8 bc pc =
16
+
let v = read_u8 bc pc in
17
+
if v >= 128 then v - 256 else v
18
+
19
+
(** Read unsigned 16-bit value from bytecode (little-endian) *)
20
+
let read_u16 bc pc =
21
+
let lo = read_u8 bc pc in
22
+
let hi = read_u8 bc (pc + 1) in
23
+
lo lor (hi lsl 8)
24
+
25
+
(** Read signed 16-bit value from bytecode *)
26
+
let read_i16 bc pc =
27
+
let v = read_u16 bc pc in
28
+
if v >= 32768 then v - 65536 else v
29
+
30
+
(** Read unsigned 32-bit value from bytecode (little-endian) *)
31
+
let read_u32 bc pc =
32
+
let b0 = read_u8 bc pc in
33
+
let b1 = read_u8 bc (pc + 1) in
34
+
let b2 = read_u8 bc (pc + 2) in
35
+
let b3 = read_u8 bc (pc + 3) in
36
+
b0 lor (b1 lsl 8) lor (b2 lsl 16) lor (b3 lsl 24)
37
+
38
+
(** Read signed 32-bit value from bytecode *)
39
+
let read_i32 bc pc =
40
+
Int32.of_int (read_u32 bc pc)
41
+
42
+
(** Get constant from constant pool *)
43
+
let get_constant frame idx =
44
+
let consts = frame.func.Bytecode.constants in
45
+
if idx >= 0 && idx < Array.length consts then
46
+
match consts.(idx) with
47
+
| Bytecode.Const_int i -> Int i
48
+
| Bytecode.Const_float f -> Float f
49
+
| Bytecode.Const_string s -> String s
50
+
| Bytecode.Const_bigint s -> BigInt (Z.of_string s)
51
+
| Bytecode.Const_function _ -> Undefined (* TODO: create closure *)
52
+
| Bytecode.Const_regexp { pattern; flags } ->
53
+
let obj = make_object ~class_id:Class_regexp
54
+
~data:(Data_regexp { pattern; flags; regexp = None }) () in
55
+
Object obj
56
+
else
57
+
Undefined
58
+
59
+
(** Binary arithmetic operation *)
60
+
let binary_arith _ctx op a b =
61
+
let an = to_float a in
62
+
let bn = to_float b in
63
+
match op with
64
+
| `Add ->
65
+
(* String concatenation if either operand is string *)
66
+
(match a, b with
67
+
| String _, _ | _, String _ -> String (to_string a ^ to_string b)
68
+
| _ -> Float (an +. bn))
69
+
| `Sub -> Float (an -. bn)
70
+
| `Mul -> Float (an *. bn)
71
+
| `Div -> Float (an /. bn)
72
+
| `Mod -> Float (Float.rem an bn)
73
+
| `Pow -> Float (Float.pow an bn)
74
+
75
+
(** Binary bitwise operation *)
76
+
let binary_bitwise _ctx op a b =
77
+
let ai = to_int32 a in
78
+
let bi = to_int32 b in
79
+
Int (match op with
80
+
| `And -> Int32.logand ai bi
81
+
| `Or -> Int32.logor ai bi
82
+
| `Xor -> Int32.logxor ai bi
83
+
| `Shl -> Int32.shift_left ai (Int32.to_int bi land 0x1f)
84
+
| `Sar -> Int32.shift_right ai (Int32.to_int bi land 0x1f)
85
+
| `Shr -> Int32.shift_right_logical ai (Int32.to_int bi land 0x1f))
86
+
87
+
(** Comparison operation *)
88
+
let compare_values _ctx op a b =
89
+
let result = match a, b with
90
+
| String a, String b ->
91
+
let cmp = String.compare a b in
92
+
(match op with
93
+
| `Lt -> cmp < 0
94
+
| `Le -> cmp <= 0
95
+
| `Gt -> cmp > 0
96
+
| `Ge -> cmp >= 0)
97
+
| _ ->
98
+
let an = to_float a in
99
+
let bn = to_float b in
100
+
if Float.is_nan an || Float.is_nan bn then false
101
+
else match op with
102
+
| `Lt -> an < bn
103
+
| `Le -> an <= bn
104
+
| `Gt -> an > bn
105
+
| `Ge -> an >= bn
106
+
in
107
+
Bool result
108
+
109
+
(** Get property from value *)
110
+
let get_prop ctx obj_val prop_name =
111
+
match obj_val with
112
+
| Object obj ->
113
+
(match get_property obj prop_name with
114
+
| Some v -> v
115
+
| None -> Undefined)
116
+
| String s ->
117
+
(* String property access *)
118
+
if prop_name = "length" then
119
+
Int (Int32.of_int (String.length s))
120
+
else begin
121
+
match int_of_string_opt prop_name with
122
+
| Some idx when idx >= 0 && idx < String.length s ->
123
+
String (String.make 1 s.[idx])
124
+
| _ -> Undefined
125
+
end
126
+
| _ ->
127
+
Context.type_error ctx ("Cannot read property '" ^ prop_name ^ "' of " ^ type_of obj_val);
128
+
Undefined
129
+
130
+
(** Set property on value *)
131
+
let set_prop ctx obj_val prop_name value =
132
+
match obj_val with
133
+
| Object obj ->
134
+
ignore (set_property obj prop_name value);
135
+
value
136
+
| _ ->
137
+
Context.type_error ctx ("Cannot set property '" ^ prop_name ^ "' of " ^ type_of obj_val);
138
+
Undefined
139
+
140
+
(** Get array element *)
141
+
let get_array_el ctx obj_val index =
142
+
match obj_val with
143
+
| Object { data = Data_array arr; _ } ->
144
+
let idx = Int32.to_int (to_int32 index) in
145
+
if idx >= 0 && idx < Array.length !arr then !arr.(idx)
146
+
else Undefined
147
+
| _ -> get_prop ctx obj_val (to_string index)
148
+
149
+
(** Set array element *)
150
+
let set_array_el ctx obj_val index value =
151
+
match obj_val with
152
+
| Object ({ data = Data_array arr; _ } as obj) ->
153
+
let idx = Int32.to_int (to_int32 index) in
154
+
if idx >= 0 then begin
155
+
if idx >= Array.length !arr then begin
156
+
(* Extend array *)
157
+
let new_arr = Array.make (idx + 1) Undefined in
158
+
Array.blit !arr 0 new_arr 0 (Array.length !arr);
159
+
arr := new_arr;
160
+
(* Update length *)
161
+
ignore (set_property obj "length" (Int (Int32.of_int (idx + 1))))
162
+
end;
163
+
!arr.(idx) <- value
164
+
end;
165
+
value
166
+
| _ -> set_prop ctx obj_val (to_string index) value
167
+
168
+
(** Call a function *)
169
+
let rec call_function ctx func_val this_val args new_target =
170
+
match func_val with
171
+
| Object { data = Data_function func; _ } ->
172
+
(* Create new frame *)
173
+
let frame = make_frame
174
+
~func:func.bytecode
175
+
~args:(Array.of_list args)
176
+
~this_val
177
+
~new_target
178
+
~var_refs:func.var_refs
179
+
in
180
+
push_frame ctx frame;
181
+
182
+
(* Execute bytecode *)
183
+
let result = execute ctx in
184
+
185
+
(* Pop frame *)
186
+
pop_frame ctx;
187
+
result
188
+
189
+
| Object { data = Data_bound_function bound; _ } ->
190
+
(* Call with bound this and prepended args *)
191
+
let all_args = Array.to_list bound.bound_args @ args in
192
+
call_function ctx bound.target bound.this_arg all_args new_target
193
+
194
+
| _ ->
195
+
Context.type_error ctx "Value is not callable";
196
+
Undefined
197
+
198
+
(** Execute bytecode in current frame *)
199
+
and execute ctx =
200
+
match current_frame ctx with
201
+
| None -> Undefined
202
+
| Some frame ->
203
+
let bc = frame.func.Bytecode.bytecode in
204
+
let len = frame.func.Bytecode.bytecode_len in
205
+
206
+
while frame.pc < len && not (has_exception ctx) do
207
+
let op_byte = read_u8 bc frame.pc in
208
+
let op : Opcode.t = Obj.magic op_byte in
209
+
210
+
(* Advance PC past opcode *)
211
+
frame.pc <- frame.pc + 1;
212
+
213
+
match op with
214
+
(* Push values *)
215
+
| Opcode.OP_undefined ->
216
+
push_value frame Undefined
217
+
218
+
| Opcode.OP_null ->
219
+
push_value frame Null
220
+
221
+
| Opcode.OP_push_true ->
222
+
push_value frame (Bool true)
223
+
224
+
| Opcode.OP_push_false ->
225
+
push_value frame (Bool false)
226
+
227
+
| Opcode.OP_push_this ->
228
+
push_value frame frame.this_val
229
+
230
+
| Opcode.OP_push_i32 ->
231
+
let v = read_i32 bc frame.pc in
232
+
frame.pc <- frame.pc + 4;
233
+
push_value frame (Int v)
234
+
235
+
| Opcode.OP_push_const ->
236
+
let idx = read_u32 bc frame.pc in
237
+
frame.pc <- frame.pc + 4;
238
+
push_value frame (get_constant frame idx)
239
+
240
+
| Opcode.OP_push_minus1 -> push_value frame (Int (-1l))
241
+
| Opcode.OP_push_0 -> push_value frame (Int 0l)
242
+
| Opcode.OP_push_1 -> push_value frame (Int 1l)
243
+
| Opcode.OP_push_2 -> push_value frame (Int 2l)
244
+
| Opcode.OP_push_3 -> push_value frame (Int 3l)
245
+
| Opcode.OP_push_4 -> push_value frame (Int 4l)
246
+
| Opcode.OP_push_5 -> push_value frame (Int 5l)
247
+
| Opcode.OP_push_6 -> push_value frame (Int 6l)
248
+
| Opcode.OP_push_7 -> push_value frame (Int 7l)
249
+
250
+
| Opcode.OP_push_i8 ->
251
+
let v = read_i8 bc frame.pc in
252
+
frame.pc <- frame.pc + 1;
253
+
push_value frame (Int (Int32.of_int v))
254
+
255
+
| Opcode.OP_push_i16 ->
256
+
let v = read_i16 bc frame.pc in
257
+
frame.pc <- frame.pc + 2;
258
+
push_value frame (Int (Int32.of_int v))
259
+
260
+
| Opcode.OP_push_const8 ->
261
+
let idx = read_u8 bc frame.pc in
262
+
frame.pc <- frame.pc + 1;
263
+
push_value frame (get_constant frame idx)
264
+
265
+
| Opcode.OP_push_empty_string ->
266
+
push_value frame (String "")
267
+
268
+
| Opcode.OP_object ->
269
+
push_value frame (Object (make_object ()))
270
+
271
+
(* Stack manipulation *)
272
+
| Opcode.OP_drop ->
273
+
ignore (pop_value frame)
274
+
275
+
| Opcode.OP_dup ->
276
+
let v = peek_value frame in
277
+
push_value frame v
278
+
279
+
| Opcode.OP_dup2 ->
280
+
let a = pop_value frame in
281
+
let b = pop_value frame in
282
+
push_value frame b;
283
+
push_value frame a;
284
+
push_value frame b;
285
+
push_value frame a
286
+
287
+
| Opcode.OP_swap ->
288
+
let a = pop_value frame in
289
+
let b = pop_value frame in
290
+
push_value frame a;
291
+
push_value frame b
292
+
293
+
| Opcode.OP_rot3l ->
294
+
let a = pop_value frame in
295
+
let b = pop_value frame in
296
+
let c = pop_value frame in
297
+
push_value frame b;
298
+
push_value frame a;
299
+
push_value frame c
300
+
301
+
| Opcode.OP_rot3r ->
302
+
let a = pop_value frame in
303
+
let b = pop_value frame in
304
+
let c = pop_value frame in
305
+
push_value frame a;
306
+
push_value frame c;
307
+
push_value frame b
308
+
309
+
(* Local variable access *)
310
+
| Opcode.OP_get_loc ->
311
+
let idx = read_u16 bc frame.pc in
312
+
frame.pc <- frame.pc + 2;
313
+
push_value frame (get_local frame idx)
314
+
315
+
| Opcode.OP_put_loc ->
316
+
let idx = read_u16 bc frame.pc in
317
+
frame.pc <- frame.pc + 2;
318
+
let v = pop_value frame in
319
+
set_local frame idx v
320
+
321
+
| Opcode.OP_set_loc ->
322
+
let idx = read_u16 bc frame.pc in
323
+
frame.pc <- frame.pc + 2;
324
+
set_local frame idx (peek_value frame)
325
+
326
+
| Opcode.OP_get_loc0 -> push_value frame (get_local frame 0)
327
+
| Opcode.OP_get_loc1 -> push_value frame (get_local frame 1)
328
+
| Opcode.OP_get_loc2 -> push_value frame (get_local frame 2)
329
+
| Opcode.OP_get_loc3 -> push_value frame (get_local frame 3)
330
+
331
+
| Opcode.OP_put_loc0 -> set_local frame 0 (pop_value frame)
332
+
| Opcode.OP_put_loc1 -> set_local frame 1 (pop_value frame)
333
+
| Opcode.OP_put_loc2 -> set_local frame 2 (pop_value frame)
334
+
| Opcode.OP_put_loc3 -> set_local frame 3 (pop_value frame)
335
+
336
+
| Opcode.OP_set_loc0 -> set_local frame 0 (peek_value frame)
337
+
| Opcode.OP_set_loc1 -> set_local frame 1 (peek_value frame)
338
+
| Opcode.OP_set_loc2 -> set_local frame 2 (peek_value frame)
339
+
| Opcode.OP_set_loc3 -> set_local frame 3 (peek_value frame)
340
+
341
+
| Opcode.OP_get_loc8 ->
342
+
let idx = read_u8 bc frame.pc in
343
+
frame.pc <- frame.pc + 1;
344
+
push_value frame (get_local frame idx)
345
+
346
+
| Opcode.OP_put_loc8 ->
347
+
let idx = read_u8 bc frame.pc in
348
+
frame.pc <- frame.pc + 1;
349
+
set_local frame idx (pop_value frame)
350
+
351
+
| Opcode.OP_set_loc8 ->
352
+
let idx = read_u8 bc frame.pc in
353
+
frame.pc <- frame.pc + 1;
354
+
set_local frame idx (peek_value frame)
355
+
356
+
(* Argument access *)
357
+
| Opcode.OP_get_arg ->
358
+
let idx = read_u16 bc frame.pc in
359
+
frame.pc <- frame.pc + 2;
360
+
push_value frame (get_arg frame idx)
361
+
362
+
| Opcode.OP_put_arg ->
363
+
let idx = read_u16 bc frame.pc in
364
+
frame.pc <- frame.pc + 2;
365
+
set_arg frame idx (pop_value frame)
366
+
367
+
| Opcode.OP_get_arg0 -> push_value frame (get_arg frame 0)
368
+
| Opcode.OP_get_arg1 -> push_value frame (get_arg frame 1)
369
+
| Opcode.OP_get_arg2 -> push_value frame (get_arg frame 2)
370
+
| Opcode.OP_get_arg3 -> push_value frame (get_arg frame 3)
371
+
372
+
| Opcode.OP_put_arg0 -> set_arg frame 0 (pop_value frame)
373
+
| Opcode.OP_put_arg1 -> set_arg frame 1 (pop_value frame)
374
+
| Opcode.OP_put_arg2 -> set_arg frame 2 (pop_value frame)
375
+
| Opcode.OP_put_arg3 -> set_arg frame 3 (pop_value frame)
376
+
377
+
(* Closure variable access *)
378
+
| Opcode.OP_get_var_ref ->
379
+
let idx = read_u16 bc frame.pc in
380
+
frame.pc <- frame.pc + 2;
381
+
push_value frame (get_var_ref frame idx)
382
+
383
+
| Opcode.OP_put_var_ref ->
384
+
let idx = read_u16 bc frame.pc in
385
+
frame.pc <- frame.pc + 2;
386
+
set_var_ref frame idx (pop_value frame)
387
+
388
+
| Opcode.OP_get_var_ref0 -> push_value frame (get_var_ref frame 0)
389
+
| Opcode.OP_get_var_ref1 -> push_value frame (get_var_ref frame 1)
390
+
| Opcode.OP_get_var_ref2 -> push_value frame (get_var_ref frame 2)
391
+
| Opcode.OP_get_var_ref3 -> push_value frame (get_var_ref frame 3)
392
+
393
+
| Opcode.OP_put_var_ref0 -> set_var_ref frame 0 (pop_value frame)
394
+
| Opcode.OP_put_var_ref1 -> set_var_ref frame 1 (pop_value frame)
395
+
| Opcode.OP_put_var_ref2 -> set_var_ref frame 2 (pop_value frame)
396
+
| Opcode.OP_put_var_ref3 -> set_var_ref frame 3 (pop_value frame)
397
+
398
+
(* Global variable access *)
399
+
| Opcode.OP_get_var | Opcode.OP_get_var_undef ->
400
+
let idx = read_u16 bc frame.pc in
401
+
frame.pc <- frame.pc + 2;
402
+
let name =
403
+
match get_constant frame idx with
404
+
| String s -> s
405
+
| _ -> ""
406
+
in
407
+
let v = get_global ctx name in
408
+
if is_undefined v && op = Opcode.OP_get_var then
409
+
Context.reference_error ctx (name ^ " is not defined");
410
+
push_value frame v
411
+
412
+
| Opcode.OP_put_var | Opcode.OP_put_var_init ->
413
+
let idx = read_u16 bc frame.pc in
414
+
frame.pc <- frame.pc + 2;
415
+
let name =
416
+
match get_constant frame idx with
417
+
| String s -> s
418
+
| _ -> ""
419
+
in
420
+
let v = pop_value frame in
421
+
set_global ctx name v
422
+
423
+
(* Property access *)
424
+
| Opcode.OP_get_field ->
425
+
let name_idx = read_u32 bc frame.pc in
426
+
frame.pc <- frame.pc + 4;
427
+
let name =
428
+
match get_constant frame name_idx with
429
+
| String s -> s
430
+
| _ -> ""
431
+
in
432
+
let obj = pop_value frame in
433
+
push_value frame (get_prop ctx obj name)
434
+
435
+
| Opcode.OP_put_field ->
436
+
let name_idx = read_u32 bc frame.pc in
437
+
frame.pc <- frame.pc + 4;
438
+
let name =
439
+
match get_constant frame name_idx with
440
+
| String s -> s
441
+
| _ -> ""
442
+
in
443
+
let v = pop_value frame in
444
+
let obj = pop_value frame in
445
+
ignore (set_prop ctx obj name v)
446
+
447
+
| Opcode.OP_get_array_el ->
448
+
let idx = pop_value frame in
449
+
let obj = pop_value frame in
450
+
push_value frame (get_array_el ctx obj idx)
451
+
452
+
| Opcode.OP_put_array_el ->
453
+
let v = pop_value frame in
454
+
let idx = pop_value frame in
455
+
let obj = pop_value frame in
456
+
ignore (set_array_el ctx obj idx v)
457
+
458
+
| Opcode.OP_define_array_el ->
459
+
(* Used for object/array literal property definition *)
460
+
(* Stack: obj, key, value *)
461
+
let v = pop_value frame in
462
+
let key = pop_value frame in
463
+
let obj = pop_value frame in
464
+
(match obj with
465
+
| Object o ->
466
+
ignore (set_property o (to_string key) v)
467
+
| _ -> ())
468
+
469
+
| Opcode.OP_define_field ->
470
+
(* Define a field with a constant name *)
471
+
let name_idx = read_u32 bc frame.pc in
472
+
frame.pc <- frame.pc + 4;
473
+
let name =
474
+
match get_constant frame name_idx with
475
+
| String s -> s
476
+
| _ -> ""
477
+
in
478
+
let v = pop_value frame in
479
+
let obj = pop_value frame in
480
+
(match obj with
481
+
| Object o ->
482
+
ignore (set_property o name v)
483
+
| _ -> ())
484
+
485
+
(* Arithmetic *)
486
+
| Opcode.OP_add ->
487
+
let b = pop_value frame in
488
+
let a = pop_value frame in
489
+
push_value frame (binary_arith ctx `Add a b)
490
+
491
+
| Opcode.OP_sub ->
492
+
let b = pop_value frame in
493
+
let a = pop_value frame in
494
+
push_value frame (binary_arith ctx `Sub a b)
495
+
496
+
| Opcode.OP_mul ->
497
+
let b = pop_value frame in
498
+
let a = pop_value frame in
499
+
push_value frame (binary_arith ctx `Mul a b)
500
+
501
+
| Opcode.OP_div ->
502
+
let b = pop_value frame in
503
+
let a = pop_value frame in
504
+
push_value frame (binary_arith ctx `Div a b)
505
+
506
+
| Opcode.OP_mod ->
507
+
let b = pop_value frame in
508
+
let a = pop_value frame in
509
+
push_value frame (binary_arith ctx `Mod a b)
510
+
511
+
| Opcode.OP_pow ->
512
+
let b = pop_value frame in
513
+
let a = pop_value frame in
514
+
push_value frame (binary_arith ctx `Pow a b)
515
+
516
+
| Opcode.OP_neg ->
517
+
let v = pop_value frame in
518
+
push_value frame (Float (-. (to_float v)))
519
+
520
+
| Opcode.OP_plus ->
521
+
let v = pop_value frame in
522
+
push_value frame (to_number v)
523
+
524
+
| Opcode.OP_inc ->
525
+
let v = pop_value frame in
526
+
push_value frame (Float (to_float v +. 1.0))
527
+
528
+
| Opcode.OP_dec ->
529
+
let v = pop_value frame in
530
+
push_value frame (Float (to_float v -. 1.0))
531
+
532
+
| Opcode.OP_post_inc ->
533
+
let v = pop_value frame in
534
+
let n = to_float v in
535
+
push_value frame (Float n);
536
+
push_value frame (Float (n +. 1.0))
537
+
538
+
| Opcode.OP_post_dec ->
539
+
let v = pop_value frame in
540
+
let n = to_float v in
541
+
push_value frame (Float n);
542
+
push_value frame (Float (n -. 1.0))
543
+
544
+
(* Bitwise *)
545
+
| Opcode.OP_and ->
546
+
let b = pop_value frame in
547
+
let a = pop_value frame in
548
+
push_value frame (binary_bitwise ctx `And a b)
549
+
550
+
| Opcode.OP_or ->
551
+
let b = pop_value frame in
552
+
let a = pop_value frame in
553
+
push_value frame (binary_bitwise ctx `Or a b)
554
+
555
+
| Opcode.OP_xor ->
556
+
let b = pop_value frame in
557
+
let a = pop_value frame in
558
+
push_value frame (binary_bitwise ctx `Xor a b)
559
+
560
+
| Opcode.OP_shl ->
561
+
let b = pop_value frame in
562
+
let a = pop_value frame in
563
+
push_value frame (binary_bitwise ctx `Shl a b)
564
+
565
+
| Opcode.OP_sar ->
566
+
let b = pop_value frame in
567
+
let a = pop_value frame in
568
+
push_value frame (binary_bitwise ctx `Sar a b)
569
+
570
+
| Opcode.OP_shr ->
571
+
let b = pop_value frame in
572
+
let a = pop_value frame in
573
+
push_value frame (binary_bitwise ctx `Shr a b)
574
+
575
+
| Opcode.OP_not ->
576
+
let v = pop_value frame in
577
+
push_value frame (Int (Int32.lognot (to_int32 v)))
578
+
579
+
| Opcode.OP_lnot ->
580
+
let v = pop_value frame in
581
+
push_value frame (Bool (not (to_boolean v)))
582
+
583
+
(* Comparison *)
584
+
| Opcode.OP_lt ->
585
+
let b = pop_value frame in
586
+
let a = pop_value frame in
587
+
push_value frame (compare_values ctx `Lt a b)
588
+
589
+
| Opcode.OP_lte ->
590
+
let b = pop_value frame in
591
+
let a = pop_value frame in
592
+
push_value frame (compare_values ctx `Le a b)
593
+
594
+
| Opcode.OP_gt ->
595
+
let b = pop_value frame in
596
+
let a = pop_value frame in
597
+
push_value frame (compare_values ctx `Gt a b)
598
+
599
+
| Opcode.OP_gte ->
600
+
let b = pop_value frame in
601
+
let a = pop_value frame in
602
+
push_value frame (compare_values ctx `Ge a b)
603
+
604
+
| Opcode.OP_eq ->
605
+
let b = pop_value frame in
606
+
let a = pop_value frame in
607
+
push_value frame (Bool (abstract_equal a b))
608
+
609
+
| Opcode.OP_neq ->
610
+
let b = pop_value frame in
611
+
let a = pop_value frame in
612
+
push_value frame (Bool (not (abstract_equal a b)))
613
+
614
+
| Opcode.OP_strict_eq ->
615
+
let b = pop_value frame in
616
+
let a = pop_value frame in
617
+
push_value frame (Bool (strict_equal a b))
618
+
619
+
| Opcode.OP_strict_neq ->
620
+
let b = pop_value frame in
621
+
let a = pop_value frame in
622
+
push_value frame (Bool (not (strict_equal a b)))
623
+
624
+
(* Type operations *)
625
+
| Opcode.OP_typeof ->
626
+
let v = pop_value frame in
627
+
push_value frame (String (type_of v))
628
+
629
+
| Opcode.OP_is_undefined ->
630
+
let v = pop_value frame in
631
+
push_value frame (Bool (is_undefined v))
632
+
633
+
| Opcode.OP_is_null ->
634
+
let v = pop_value frame in
635
+
push_value frame (Bool (is_null v))
636
+
637
+
| Opcode.OP_is_undefined_or_null ->
638
+
let v = pop_value frame in
639
+
push_value frame (Bool (is_nullish v))
640
+
641
+
| Opcode.OP_typeof_is_undefined ->
642
+
let v = pop_value frame in
643
+
push_value frame (Bool (type_of v = "undefined"))
644
+
645
+
| Opcode.OP_typeof_is_function ->
646
+
let v = pop_value frame in
647
+
push_value frame (Bool (type_of v = "function"))
648
+
649
+
| Opcode.OP_instanceof ->
650
+
let ctor = pop_value frame in
651
+
let obj = pop_value frame in
652
+
let result = match obj, ctor with
653
+
| Object obj, Object { data = Data_function _; prototype; _ } ->
654
+
(* Check prototype chain *)
655
+
let rec check proto =
656
+
match proto with
657
+
| Null -> false
658
+
| Object p when strict_equal (Object p) prototype -> true
659
+
| Object p -> check p.prototype
660
+
| _ -> false
661
+
in
662
+
check obj.prototype
663
+
| _ -> false
664
+
in
665
+
push_value frame (Bool result)
666
+
667
+
| Opcode.OP_in ->
668
+
let obj = pop_value frame in
669
+
let key = pop_value frame in
670
+
let result = match obj with
671
+
| Object o -> has_own_property o (to_string key)
672
+
| _ -> false
673
+
in
674
+
push_value frame (Bool result)
675
+
676
+
(* Control flow *)
677
+
| Opcode.OP_goto ->
678
+
let offset = read_i32 bc frame.pc |> Int32.to_int in
679
+
frame.pc <- frame.pc + 4 + offset
680
+
681
+
| Opcode.OP_if_true ->
682
+
let offset = read_i32 bc frame.pc |> Int32.to_int in
683
+
frame.pc <- frame.pc + 4;
684
+
let v = pop_value frame in
685
+
if to_boolean v then
686
+
frame.pc <- frame.pc + offset
687
+
688
+
| Opcode.OP_if_false ->
689
+
let offset = read_i32 bc frame.pc |> Int32.to_int in
690
+
frame.pc <- frame.pc + 4;
691
+
let v = pop_value frame in
692
+
if not (to_boolean v) then
693
+
frame.pc <- frame.pc + offset
694
+
695
+
| Opcode.OP_goto8 ->
696
+
let offset = read_i8 bc frame.pc in
697
+
frame.pc <- frame.pc + 1 + offset
698
+
699
+
| Opcode.OP_goto16 ->
700
+
let offset = read_i16 bc frame.pc in
701
+
frame.pc <- frame.pc + 2 + offset
702
+
703
+
| Opcode.OP_if_true8 ->
704
+
let offset = read_i8 bc frame.pc in
705
+
frame.pc <- frame.pc + 1;
706
+
let v = pop_value frame in
707
+
if to_boolean v then
708
+
frame.pc <- frame.pc + offset
709
+
710
+
| Opcode.OP_if_false8 ->
711
+
let offset = read_i8 bc frame.pc in
712
+
frame.pc <- frame.pc + 1;
713
+
let v = pop_value frame in
714
+
if not (to_boolean v) then
715
+
frame.pc <- frame.pc + offset
716
+
717
+
(* Function calls *)
718
+
| Opcode.OP_call ->
719
+
let argc = read_u16 bc frame.pc in
720
+
frame.pc <- frame.pc + 2;
721
+
(* Pop arguments in reverse order *)
722
+
let args = Array.init argc (fun _ -> pop_value frame) in
723
+
let args = Array.to_list (Array.init argc (fun i -> args.(argc - 1 - i))) in
724
+
let func = pop_value frame in
725
+
let result = call_function ctx func Undefined args Undefined in
726
+
push_value frame result
727
+
728
+
| Opcode.OP_call0 ->
729
+
let func = pop_value frame in
730
+
let result = call_function ctx func Undefined [] Undefined in
731
+
push_value frame result
732
+
733
+
| Opcode.OP_call1 ->
734
+
let arg = pop_value frame in
735
+
let func = pop_value frame in
736
+
let result = call_function ctx func Undefined [arg] Undefined in
737
+
push_value frame result
738
+
739
+
| Opcode.OP_call2 ->
740
+
let arg2 = pop_value frame in
741
+
let arg1 = pop_value frame in
742
+
let func = pop_value frame in
743
+
let result = call_function ctx func Undefined [arg1; arg2] Undefined in
744
+
push_value frame result
745
+
746
+
| Opcode.OP_call3 ->
747
+
let arg3 = pop_value frame in
748
+
let arg2 = pop_value frame in
749
+
let arg1 = pop_value frame in
750
+
let func = pop_value frame in
751
+
let result = call_function ctx func Undefined [arg1; arg2; arg3] Undefined in
752
+
push_value frame result
753
+
754
+
| Opcode.OP_call_method ->
755
+
let argc = read_u16 bc frame.pc in
756
+
frame.pc <- frame.pc + 2;
757
+
let args = Array.init argc (fun _ -> pop_value frame) in
758
+
let args = Array.to_list (Array.init argc (fun i -> args.(argc - 1 - i))) in
759
+
let func = pop_value frame in
760
+
let this_val = pop_value frame in
761
+
let result = call_function ctx func this_val args Undefined in
762
+
push_value frame result
763
+
764
+
| Opcode.OP_call_constructor ->
765
+
let argc = read_u16 bc frame.pc in
766
+
frame.pc <- frame.pc + 2;
767
+
let args = Array.init argc (fun _ -> pop_value frame) in
768
+
let args = Array.to_list (Array.init argc (fun i -> args.(argc - 1 - i))) in
769
+
let func = pop_value frame in
770
+
(* Create new object as this *)
771
+
let this_val = Object (make_object ()) in
772
+
let result = call_function ctx func this_val args func in
773
+
(* Return the object if constructor didn't return an object *)
774
+
let final = match result with
775
+
| Object _ -> result
776
+
| _ -> this_val
777
+
in
778
+
push_value frame final
779
+
780
+
(* Return *)
781
+
| Opcode.OP_return ->
782
+
let v = pop_value frame in
783
+
frame.pc <- len; (* Exit loop *)
784
+
push_value frame v (* Leave return value on stack *)
785
+
786
+
| Opcode.OP_return_undef ->
787
+
frame.pc <- len;
788
+
push_value frame Undefined
789
+
790
+
(* Exception handling *)
791
+
| Opcode.OP_throw ->
792
+
let v = pop_value frame in
793
+
throw ctx v
794
+
795
+
| Opcode.OP_catch ->
796
+
let offset = read_i32 bc frame.pc |> Int32.to_int in
797
+
frame.pc <- frame.pc + 4;
798
+
frame.catch_stack <- { catch_pc = frame.pc + offset - 4; stack_len = List.length frame.stack } :: frame.catch_stack
799
+
800
+
| Opcode.OP_nip_catch ->
801
+
(match frame.catch_stack with
802
+
| _ :: rest -> frame.catch_stack <- rest
803
+
| [] -> ())
804
+
805
+
(* No-op *)
806
+
| Opcode.OP_nop -> ()
807
+
808
+
(* Unimplemented - just skip their operands *)
809
+
| Opcode.OP_fclosure | Opcode.OP_push_atom_value | Opcode.OP_private_symbol ->
810
+
frame.pc <- frame.pc + 4;
811
+
push_value frame Undefined
812
+
813
+
| Opcode.OP_special_object ->
814
+
frame.pc <- frame.pc + 1;
815
+
push_value frame (Object (make_object ()))
816
+
817
+
| Opcode.OP_rest ->
818
+
frame.pc <- frame.pc + 2;
819
+
push_value frame (make_array [])
820
+
821
+
| Opcode.OP_fclosure8 ->
822
+
frame.pc <- frame.pc + 1;
823
+
push_value frame Undefined
824
+
825
+
| Opcode.OP_get_length ->
826
+
let v = pop_value frame in
827
+
(match v with
828
+
| Object { data = Data_array arr; _ } ->
829
+
push_value frame (Int (Int32.of_int (Array.length !arr)))
830
+
| String s ->
831
+
push_value frame (Int (Int32.of_int (String.length s)))
832
+
| _ ->
833
+
push_value frame (get_prop ctx v "length"))
834
+
835
+
| Opcode.OP_to_object ->
836
+
let v = pop_value frame in
837
+
(match v with
838
+
| Object _ -> push_value frame v
839
+
| String s ->
840
+
let obj = make_object () in
841
+
ignore (set_property obj "length" (Int (Int32.of_int (String.length s))));
842
+
push_value frame (Object obj)
843
+
| _ -> push_value frame (Object (make_object ())))
844
+
845
+
| Opcode.OP_to_propkey ->
846
+
let v = pop_value frame in
847
+
push_value frame (String (to_string v))
848
+
849
+
(* Handle remaining opcodes as no-ops for now *)
850
+
| _ ->
851
+
(* Skip operands based on opcode size *)
852
+
let size = Opcode.size op in
853
+
frame.pc <- frame.pc + size - 1
854
+
done;
855
+
856
+
(* Handle exceptions *)
857
+
if has_exception ctx then begin
858
+
match frame.catch_stack with
859
+
| { catch_pc; stack_len } :: rest ->
860
+
frame.catch_stack <- rest;
861
+
(* Unwind stack *)
862
+
while List.length frame.stack > stack_len do
863
+
ignore (pop_value frame)
864
+
done;
865
+
(* Push exception value *)
866
+
(match get_exception ctx with
867
+
| Some e -> push_value frame e
868
+
| None -> ());
869
+
frame.pc <- catch_pc;
870
+
execute ctx
871
+
| [] ->
872
+
Undefined
873
+
end else
874
+
(* Return value is top of stack *)
875
+
match frame.stack with
876
+
| v :: _ -> v
877
+
| [] -> Undefined
878
+
879
+
(** Run bytecode in a new context *)
880
+
let run bytecode =
881
+
let ctx = create () in
882
+
let frame = make_frame
883
+
~func:bytecode
884
+
~args:[||]
885
+
~this_val:(Object ctx.global)
886
+
~new_target:Undefined
887
+
~var_refs:[||]
888
+
in
889
+
push_frame ctx frame;
890
+
let result = execute ctx in
891
+
pop_frame ctx;
892
+
result
893
+
894
+
(** Evaluate source code *)
895
+
let eval_source source =
896
+
let lexer = Quickjs_parser.Lexer.create ~filename:"<eval>" ~content:source in
897
+
let parser = Quickjs_parser.Parser.create lexer in
898
+
let ast = Quickjs_parser.Parser.parse_program parser in
899
+
let bytecode = Quickjs_compiler.Compiler.compile_program ast in
900
+
run bytecode
+418
lib/quickjs/runtime/value.ml
+418
lib/quickjs/runtime/value.ml
···
1
+
(** QuickJS Runtime Values.
2
+
3
+
This module defines the runtime value representation for JavaScript values.
4
+
Values are tagged to distinguish between different types. *)
5
+
6
+
(** Atom - interned string identifier *)
7
+
type atom = int
8
+
9
+
(** Property flags *)
10
+
type prop_flags = {
11
+
writable : bool;
12
+
enumerable : bool;
13
+
configurable : bool;
14
+
}
15
+
16
+
let default_prop_flags = {
17
+
writable = true;
18
+
enumerable = true;
19
+
configurable = true;
20
+
}
21
+
22
+
(** Object property *)
23
+
type property = {
24
+
value : value;
25
+
flags : prop_flags;
26
+
getter : value option;
27
+
setter : value option;
28
+
}
29
+
30
+
(** JavaScript object *)
31
+
and js_object = {
32
+
mutable prototype : value;
33
+
mutable properties : (string, property) Hashtbl.t;
34
+
mutable extensible : bool;
35
+
mutable class_id : object_class;
36
+
mutable data : object_data;
37
+
}
38
+
39
+
(** Object class/type *)
40
+
and object_class =
41
+
| Class_object
42
+
| Class_array
43
+
| Class_function
44
+
| Class_bound_function
45
+
| Class_generator
46
+
| Class_async_function
47
+
| Class_async_generator
48
+
| Class_error
49
+
| Class_regexp
50
+
| Class_date
51
+
| Class_map
52
+
| Class_set
53
+
| Class_weakmap
54
+
| Class_weakset
55
+
| Class_promise
56
+
| Class_proxy
57
+
| Class_arraybuffer
58
+
| Class_dataview
59
+
| Class_int8array
60
+
| Class_uint8array
61
+
| Class_uint8clampedarray
62
+
| Class_int16array
63
+
| Class_uint16array
64
+
| Class_int32array
65
+
| Class_uint32array
66
+
| Class_float32array
67
+
| Class_float64array
68
+
| Class_bigint64array
69
+
| Class_biguint64array
70
+
71
+
(** Object-specific data *)
72
+
and object_data =
73
+
| Data_none
74
+
| Data_array of value array ref
75
+
| Data_function of js_function
76
+
| Data_bound_function of bound_function
77
+
| Data_generator of generator_state
78
+
| Data_error of { message : string; name : string; stack : string }
79
+
| Data_regexp of { pattern : string; flags : string; regexp : Str.regexp option }
80
+
| Data_date of float
81
+
| Data_map of (value, value) Hashtbl.t
82
+
| Data_set of (value, unit) Hashtbl.t
83
+
| Data_weakmap (* WeakMaps need special handling *)
84
+
| Data_weakset
85
+
| Data_promise of promise_state
86
+
| Data_arraybuffer of bytes
87
+
| Data_typed_array of { buffer : js_object; byte_offset : int; length : int }
88
+
89
+
(** JavaScript function *)
90
+
and js_function = {
91
+
bytecode : Quickjs_compiler.Bytecode.function_bytecode;
92
+
var_refs : var_ref array;
93
+
home_object : value;
94
+
}
95
+
96
+
(** Bound function *)
97
+
and bound_function = {
98
+
target : value;
99
+
this_arg : value;
100
+
bound_args : value array;
101
+
}
102
+
103
+
(** Generator state *)
104
+
and generator_state = {
105
+
mutable state : [`Suspended | `Executing | `Completed];
106
+
mutable pc : int;
107
+
mutable stack : value list;
108
+
mutable locals : value array;
109
+
}
110
+
111
+
(** Promise state *)
112
+
and promise_state = {
113
+
mutable state : [`Pending | `Fulfilled of value | `Rejected of value];
114
+
mutable reactions : promise_reaction list;
115
+
}
116
+
117
+
and promise_reaction = {
118
+
handler : value;
119
+
on_fulfill : bool;
120
+
}
121
+
122
+
(** Variable reference for closures *)
123
+
and var_ref = {
124
+
mutable ref_value : value;
125
+
mutable is_detached : bool;
126
+
}
127
+
128
+
(** JavaScript runtime value *)
129
+
and value =
130
+
| Undefined
131
+
| Null
132
+
| Bool of bool
133
+
| Int of int32
134
+
| Float of float
135
+
| String of string
136
+
| Symbol of { description : string option; id : int }
137
+
| BigInt of Z.t
138
+
| Object of js_object
139
+
| Exception of value (* Wrapped exception *)
140
+
| Uninitialized (* For TDZ *)
141
+
142
+
(** Check if value is undefined *)
143
+
let is_undefined = function Undefined -> true | _ -> false
144
+
145
+
(** Check if value is null *)
146
+
let is_null = function Null -> true | _ -> false
147
+
148
+
(** Check if value is undefined or null *)
149
+
let is_nullish = function
150
+
| Undefined | Null -> true
151
+
| _ -> false
152
+
153
+
(** Check if value is a boolean *)
154
+
let is_bool = function Bool _ -> true | _ -> false
155
+
156
+
(** Check if value is a number (int or float) *)
157
+
let is_number = function Int _ | Float _ -> true | _ -> false
158
+
159
+
(** Check if value is a string *)
160
+
let is_string = function String _ -> true | _ -> false
161
+
162
+
(** Check if value is a symbol *)
163
+
let is_symbol = function Symbol _ -> true | _ -> false
164
+
165
+
(** Check if value is a bigint *)
166
+
let is_bigint = function BigInt _ -> true | _ -> false
167
+
168
+
(** Check if value is an object *)
169
+
let is_object = function Object _ -> true | _ -> false
170
+
171
+
(** Check if value is a function *)
172
+
let is_function = function
173
+
| Object { class_id = Class_function; _ }
174
+
| Object { class_id = Class_bound_function; _ }
175
+
| Object { class_id = Class_async_function; _ }
176
+
| Object { class_id = Class_generator; _ }
177
+
| Object { class_id = Class_async_generator; _ } -> true
178
+
| _ -> false
179
+
180
+
(** Check if value is an array *)
181
+
let is_array = function
182
+
| Object { class_id = Class_array; _ } -> true
183
+
| _ -> false
184
+
185
+
(** Convert value to boolean (ToBoolean) *)
186
+
let to_boolean = function
187
+
| Undefined | Null -> false
188
+
| Bool b -> b
189
+
| Int i -> i <> 0l
190
+
| Float f -> f <> 0.0 && not (Float.is_nan f)
191
+
| String s -> String.length s > 0
192
+
| Symbol _ -> true
193
+
| BigInt z -> not (Z.equal z Z.zero)
194
+
| Object _ -> true
195
+
| Exception _ -> true
196
+
| Uninitialized -> false
197
+
198
+
(** Convert value to number (ToNumber) *)
199
+
let to_number = function
200
+
| Undefined -> Float Float.nan
201
+
| Null -> Float 0.0
202
+
| Bool true -> Int 1l
203
+
| Bool false -> Int 0l
204
+
| Int _ as v -> v
205
+
| Float _ as v -> v
206
+
| String s ->
207
+
(try
208
+
let s = String.trim s in
209
+
if s = "" then Int 0l
210
+
else if String.contains s '.' || String.contains s 'e' || String.contains s 'E' then
211
+
Float (Float.of_string s)
212
+
else
213
+
Int (Int32.of_string s)
214
+
with _ -> Float Float.nan)
215
+
| Symbol _ -> Float Float.nan (* Would throw TypeError *)
216
+
| BigInt _ -> Float Float.nan (* Would throw TypeError *)
217
+
| Object _ -> Float Float.nan (* Would call ToPrimitive *)
218
+
| Exception _ -> Float Float.nan
219
+
| Uninitialized -> Float Float.nan
220
+
221
+
(** Convert to float *)
222
+
let to_float v =
223
+
match to_number v with
224
+
| Int i -> Int32.to_float i
225
+
| Float f -> f
226
+
| _ -> Float.nan
227
+
228
+
(** Convert to int32 *)
229
+
let to_int32 v =
230
+
match to_number v with
231
+
| Int i -> i
232
+
| Float f ->
233
+
if Float.is_nan f || Float.is_infinite f then 0l
234
+
else Int32.of_float (Float.trunc (Float.rem f 4294967296.0))
235
+
| _ -> 0l
236
+
237
+
(** Convert to uint32 *)
238
+
let to_uint32 v =
239
+
(* For uint32, we just return the int32 value - the bit pattern is the same *)
240
+
to_int32 v
241
+
242
+
(** Convert value to string (ToString) *)
243
+
let rec to_string = function
244
+
| Undefined -> "undefined"
245
+
| Null -> "null"
246
+
| Bool true -> "true"
247
+
| Bool false -> "false"
248
+
| Int i -> Int32.to_string i
249
+
| Float f ->
250
+
if Float.is_nan f then "NaN"
251
+
else if Float.is_infinite f then if f > 0.0 then "Infinity" else "-Infinity"
252
+
else
253
+
let s = Printf.sprintf "%.17g" f in
254
+
(* Remove trailing zeros after decimal point *)
255
+
if String.contains s '.' then
256
+
let len = String.length s in
257
+
let rec trim_zeros i =
258
+
if i <= 0 then s
259
+
else if s.[i] = '0' then trim_zeros (i - 1)
260
+
else if s.[i] = '.' then String.sub s 0 i
261
+
else String.sub s 0 (i + 1)
262
+
in
263
+
trim_zeros (len - 1)
264
+
else s
265
+
| String s -> s
266
+
| Symbol { description; _ } ->
267
+
(match description with
268
+
| Some d -> "Symbol(" ^ d ^ ")"
269
+
| None -> "Symbol()")
270
+
| BigInt z -> Z.to_string z
271
+
| Object obj ->
272
+
(match obj.class_id with
273
+
| Class_array -> "[object Array]"
274
+
| Class_function | Class_bound_function -> "[object Function]"
275
+
| Class_error -> "[object Error]"
276
+
| Class_regexp ->
277
+
(match obj.data with
278
+
| Data_regexp { pattern; flags; _ } -> "/" ^ pattern ^ "/" ^ flags
279
+
| _ -> "[object RegExp]")
280
+
| Class_date -> "[object Date]"
281
+
| _ -> "[object Object]")
282
+
| Exception v -> "Exception: " ^ to_string v
283
+
| Uninitialized -> "<uninitialized>"
284
+
285
+
(** Get typeof value *)
286
+
let type_of = function
287
+
| Undefined -> "undefined"
288
+
| Null -> "object" (* Historical quirk *)
289
+
| Bool _ -> "boolean"
290
+
| Int _ | Float _ -> "number"
291
+
| String _ -> "string"
292
+
| Symbol _ -> "symbol"
293
+
| BigInt _ -> "bigint"
294
+
| Object { class_id; _ } ->
295
+
(match class_id with
296
+
| Class_function | Class_bound_function
297
+
| Class_async_function | Class_generator
298
+
| Class_async_generator -> "function"
299
+
| _ -> "object")
300
+
| Exception _ -> "object"
301
+
| Uninitialized -> "undefined"
302
+
303
+
(** Create a new object *)
304
+
let make_object ?(prototype=Null) ?(class_id=Class_object) ?(data=Data_none) () = {
305
+
prototype;
306
+
properties = Hashtbl.create 8;
307
+
extensible = true;
308
+
class_id;
309
+
data;
310
+
}
311
+
312
+
(** Create a new array *)
313
+
let make_array elements =
314
+
let arr = ref (Array.of_list elements) in
315
+
let obj = make_object ~class_id:Class_array ~data:(Data_array arr) () in
316
+
Hashtbl.add obj.properties "length"
317
+
{ value = Int (Int32.of_int (Array.length !arr));
318
+
flags = { default_prop_flags with enumerable = false };
319
+
getter = None; setter = None };
320
+
Object obj
321
+
322
+
(** Create a new function object *)
323
+
let make_function bytecode var_refs =
324
+
let func = {
325
+
bytecode;
326
+
var_refs;
327
+
home_object = Undefined;
328
+
} in
329
+
let obj = make_object ~class_id:Class_function ~data:(Data_function func) () in
330
+
Object obj
331
+
332
+
(** Get object property *)
333
+
let rec get_property obj name =
334
+
match Hashtbl.find_opt obj.properties name with
335
+
| Some prop ->
336
+
(match prop.getter with
337
+
| Some _ -> None (* Would need to call getter *)
338
+
| None -> Some prop.value)
339
+
| None ->
340
+
(* Check prototype chain *)
341
+
(match obj.prototype with
342
+
| Object proto -> get_property proto name
343
+
| _ -> None)
344
+
345
+
(** Set object property *)
346
+
let set_property obj name value =
347
+
match Hashtbl.find_opt obj.properties name with
348
+
| Some prop ->
349
+
if prop.flags.writable then begin
350
+
Hashtbl.replace obj.properties name { prop with value };
351
+
true
352
+
end else false
353
+
| None ->
354
+
if obj.extensible then begin
355
+
Hashtbl.add obj.properties name
356
+
{ value; flags = default_prop_flags; getter = None; setter = None };
357
+
true
358
+
end else false
359
+
360
+
(** Define a property with flags *)
361
+
let define_property obj name value flags =
362
+
Hashtbl.replace obj.properties name
363
+
{ value; flags; getter = None; setter = None }
364
+
365
+
(** Check if object has own property *)
366
+
let has_own_property obj name =
367
+
Hashtbl.mem obj.properties name
368
+
369
+
(** Get own property names *)
370
+
let get_own_property_names obj =
371
+
Hashtbl.fold (fun k _ acc -> k :: acc) obj.properties []
372
+
373
+
(** Strict equality (===) *)
374
+
let strict_equal a b =
375
+
match a, b with
376
+
| Undefined, Undefined -> true
377
+
| Null, Null -> true
378
+
| Bool a, Bool b -> a = b
379
+
| Int a, Int b -> a = b
380
+
| Float a, Float b -> a = b
381
+
| Int a, Float b -> Int32.to_float a = b
382
+
| Float a, Int b -> a = Int32.to_float b
383
+
| String a, String b -> a = b
384
+
| Symbol { id = a; _ }, Symbol { id = b; _ } -> a = b
385
+
| BigInt a, BigInt b -> Z.equal a b
386
+
| Object a, Object b -> a == b (* Same object reference *)
387
+
| _, _ -> false
388
+
389
+
(** Abstract equality (==) *)
390
+
let rec abstract_equal a b =
391
+
if strict_equal a b then true
392
+
else match a, b with
393
+
| Null, Undefined | Undefined, Null -> true
394
+
| Int a, String b ->
395
+
(match to_number (String b) with
396
+
| Int i -> a = i
397
+
| Float f -> Int32.to_float a = f
398
+
| _ -> false)
399
+
| String a, Int b ->
400
+
(match to_number (String a) with
401
+
| Int i -> i = b
402
+
| Float f -> f = Int32.to_float b
403
+
| _ -> false)
404
+
| Bool _, _ -> abstract_equal (to_number a) b
405
+
| _, Bool _ -> abstract_equal a (to_number b)
406
+
| (Int _ | Float _), Object _ -> abstract_equal a (to_number b)
407
+
| Object _, (Int _ | Float _) -> abstract_equal (to_number a) b
408
+
| String _, Object _ -> abstract_equal a (to_string b |> fun s -> String s)
409
+
| Object _, String _ -> abstract_equal (to_string a |> fun s -> String s) b
410
+
| _, _ -> false
411
+
412
+
(** Symbol counter for unique IDs *)
413
+
let symbol_counter = ref 0
414
+
415
+
(** Create a new symbol *)
416
+
let make_symbol ?description () =
417
+
incr symbol_counter;
418
+
Symbol { description; id = !symbol_counter }
+4
test/dune
+4
test/dune
+103
test/interpreter_test.ml
+103
test/interpreter_test.ml
···
1
+
(** Simple interpreter tests *)
2
+
3
+
let test_eval code expected =
4
+
let result = Quickjs_runtime.Interpreter.eval_source code in
5
+
let actual = Quickjs_runtime.Value.to_string result in
6
+
if actual = expected then
7
+
Printf.printf "[PASS] %s => %s\n" code actual
8
+
else
9
+
Printf.printf "[FAIL] %s => expected '%s', got '%s'\n" code expected actual
10
+
11
+
let test_bool code expected =
12
+
let result = Quickjs_runtime.Interpreter.eval_source code in
13
+
let actual = Quickjs_runtime.Value.to_boolean result in
14
+
if actual = expected then
15
+
Printf.printf "[PASS] %s => %b\n" code actual
16
+
else
17
+
Printf.printf "[FAIL] %s => expected %b, got %b\n" code expected actual
18
+
19
+
let () =
20
+
print_endline "=== Interpreter Tests ===\n";
21
+
22
+
print_endline "--- Literals ---";
23
+
test_eval "42" "42";
24
+
test_eval "3.14" "3.14";
25
+
test_eval "\"hello\"" "hello";
26
+
test_eval "true" "true";
27
+
test_eval "false" "false";
28
+
test_eval "null" "null";
29
+
test_eval "undefined" "undefined";
30
+
31
+
print_endline "\n--- Arithmetic ---";
32
+
test_eval "1 + 2" "3";
33
+
test_eval "10 - 3" "7";
34
+
test_eval "4 * 5" "20";
35
+
test_eval "15 / 3" "5";
36
+
test_eval "17 % 5" "2";
37
+
test_eval "2 ** 10" "1024";
38
+
test_eval "-5" "-5";
39
+
test_eval "1 + 2 * 3" "7";
40
+
test_eval "(1 + 2) * 3" "9";
41
+
42
+
print_endline "\n--- String concatenation ---";
43
+
test_eval "\"hello\" + \" world\"" "hello world";
44
+
test_eval "\"x\" + 1" "x1";
45
+
46
+
print_endline "\n--- Comparison ---";
47
+
test_bool "1 < 2" true;
48
+
test_bool "2 < 1" false;
49
+
test_bool "2 <= 2" true;
50
+
test_bool "3 > 2" true;
51
+
test_bool "3 >= 3" true;
52
+
test_bool "1 == 1" true;
53
+
test_bool "1 == \"1\"" true;
54
+
test_bool "1 === 1" true;
55
+
test_bool "1 === \"1\"" false;
56
+
test_bool "1 != 2" true;
57
+
test_bool "1 !== \"1\"" true;
58
+
59
+
print_endline "\n--- Logic ---";
60
+
test_bool "!true" false;
61
+
test_bool "!false" true;
62
+
test_bool "true && true" true;
63
+
test_bool "true && false" false;
64
+
test_bool "false || true" true;
65
+
test_bool "false || false" false;
66
+
67
+
print_endline "\n--- Typeof ---";
68
+
test_eval "typeof undefined" "undefined";
69
+
test_eval "typeof null" "object";
70
+
test_eval "typeof true" "boolean";
71
+
test_eval "typeof 42" "number";
72
+
test_eval "typeof \"hello\"" "string";
73
+
test_eval "typeof {}" "object";
74
+
75
+
print_endline "\n--- Variables ---";
76
+
test_eval "var x = 10; x" "10";
77
+
test_eval "let y = 20; y" "20";
78
+
test_eval "const z = 30; z" "30";
79
+
test_eval "var a = 1; var b = 2; a + b" "3";
80
+
81
+
print_endline "\n--- Objects ---";
82
+
(* Simpler object test first *)
83
+
test_eval "var obj = {}; obj" "[object Object]";
84
+
test_eval "var obj = {a: 1}; obj.a" "1";
85
+
(* test_eval "var obj = {}; obj.x = 5; obj.x" "5"; *)
86
+
(* test_eval "var obj = {a: 1, b: 2}; obj.a + obj.b" "3"; *)
87
+
88
+
print_endline "\n--- Conditionals ---";
89
+
test_eval "1 > 0 ? \"yes\" : \"no\"" "yes";
90
+
test_eval "1 < 0 ? \"yes\" : \"no\"" "no";
91
+
test_eval "var r; if (true) { r = 1 } else { r = 2 }; r" "1";
92
+
test_eval "var r; if (false) { r = 1 } else { r = 2 }; r" "2";
93
+
94
+
print_endline "\n--- Functions ---";
95
+
test_eval "function add(a, b) { return a + b }; add(3, 4)" "7";
96
+
test_eval "var double = function(x) { return x * 2 }; double(5)" "10";
97
+
test_eval "(function(x) { return x + 1 })(10)" "11";
98
+
99
+
print_endline "\n--- Loops ---";
100
+
test_eval "var sum = 0; for (var i = 0; i < 5; i++) { sum = sum + i }; sum" "10";
101
+
test_eval "var x = 0; while (x < 3) { x = x + 1 }; x" "3";
102
+
103
+
print_endline "\n=== Tests Complete ==="
+8
test/runner/debug_async.ml
+8
test/runner/debug_async.ml
···
1
+
let () =
2
+
let code = {|f(await)|} in
3
+
let lexer = Quickjs.Lexer.create ~filename:"test.js" ~content:code in
4
+
let parser = Quickjs.Parser.create lexer in
5
+
match Quickjs.Parser.parse_program parser with
6
+
| ast -> Printf.printf "OK: %d items\n" (List.length ast.body)
7
+
| exception Quickjs.Parser.Parse_error (e, _loc) ->
8
+
Printf.printf "Error: %s\n" (Quickjs.Parser.show_error e)
+8
test/runner/dune
+8
test/runner/dune
+24
test/runner/quick_test.ml
+24
test/runner/quick_test.ml
···
1
+
let () =
2
+
let tests = [
3
+
("async function expression", {|let f = async function f(p, q) { };|});
4
+
("generator function expression", {|let f = function* f() { yield 1; };|});
5
+
("async generator function expression", {|let f = async function* f() { yield 1; };|});
6
+
("generator method", {|var o = { *gen() { yield 1; } };|});
7
+
("async method", {|var o = { async foo() { await 1; } };|});
8
+
("async generator method", {|var o = { async *gen() { yield 1; } };|});
9
+
("class declaration", {|class C { foo() {} }|});
10
+
("async function decl", {|async function f() {}|});
11
+
("async generator decl", {|async function* f() {}|});
12
+
] in
13
+
List.iter (fun (name, code) ->
14
+
let lexer = Quickjs.Lexer.create ~filename:"test.js" ~content:code in
15
+
let parser = Quickjs.Parser.create lexer in
16
+
try
17
+
let _ = Quickjs.Parser.parse_program parser in
18
+
Printf.printf "OK: %s\n" name
19
+
with
20
+
| Quickjs.Parser.Parse_error (err, _loc) ->
21
+
Printf.printf "FAIL: %s - %s\n" name (Quickjs.Parser.show_error err)
22
+
| Quickjs.Lexer.Lexer_error (err, _loc) ->
23
+
Printf.printf "FAIL: %s - %s\n" name (Quickjs.Lexer.show_error err)
24
+
) tests
+44
-16
test/runner/test262_runner.ml
+44
-16
test/runner/test262_runner.ml
···
73
73
(* Simple YAML-like parsing *)
74
74
let lines = String.split_on_char '\n' yaml_content in
75
75
76
+
(* Parse inline list format like [item1, item2] *)
77
+
let parse_inline_list s =
78
+
if String.length s >= 2 && s.[0] = '[' && s.[String.length s - 1] = ']' then
79
+
let inner = String.sub s 1 (String.length s - 2) in
80
+
String.split_on_char ',' inner
81
+
|> List.map String.trim
82
+
|> List.filter (fun s -> String.length s > 0)
83
+
else []
84
+
in
85
+
76
86
(* Parse a list of values that follow a key (indented lines starting with -) *)
77
87
let rec parse_list acc = function
78
88
| [] -> (List.rev acc, [])
···
131
141
let type_ = List.assoc_opt "type" fields |> Option.value ~default:"" in
132
142
parse_lines { acc with negative = Some { phase; type_ } } rest'
133
143
| "features" ->
134
-
let (items, rest') = parse_list [] rest in
135
-
parse_lines { acc with features = items } rest'
144
+
if String.length value > 0 && value.[0] = '[' then
145
+
parse_lines { acc with features = parse_inline_list value } rest
146
+
else
147
+
let (items, rest') = parse_list [] rest in
148
+
parse_lines { acc with features = items } rest'
136
149
| "includes" ->
137
-
let (items, rest') = parse_list [] rest in
138
-
parse_lines { acc with includes = items } rest'
150
+
if String.length value > 0 && value.[0] = '[' then
151
+
parse_lines { acc with includes = parse_inline_list value } rest
152
+
else
153
+
let (items, rest') = parse_list [] rest in
154
+
parse_lines { acc with includes = items } rest'
139
155
| "flags" ->
140
-
let (items, rest') = parse_list [] rest in
141
-
parse_lines { acc with flags = items } rest'
156
+
if String.length value > 0 && value.[0] = '[' then
157
+
parse_lines { acc with flags = parse_inline_list value } rest
158
+
else
159
+
let (items, rest') = parse_list [] rest in
160
+
parse_lines { acc with flags = items } rest'
142
161
| _ ->
143
162
parse_lines acc rest
144
163
in
···
151
170
(* We can incrementally add support and remove from this list *)
152
171
"Atomics"; "SharedArrayBuffer";
153
172
(* Platform-specific *)
154
-
"caller"; "Intl";
173
+
"caller";
155
174
] in
156
175
let uses_unsupported = List.exists (fun f ->
157
176
List.mem f unsupported_features
···
190
209
match should_skip config filename metadata with
191
210
| Some reason -> Skip reason
192
211
| None ->
193
-
(* For now, just try to lex the file as a basic test *)
212
+
(* Handle strict mode flags *)
213
+
let content =
214
+
if List.mem "onlyStrict" metadata.flags then
215
+
"\"use strict\";\n" ^ content
216
+
else
217
+
content
218
+
in
219
+
(* Check if this is a module *)
220
+
let is_module = List.mem "module" metadata.flags in
221
+
(* Try to lex and parse the file *)
194
222
(try
195
223
let lexer = Quickjs.Lexer.create ~filename ~content in
196
-
let rec lex_all () =
197
-
let tok = Quickjs.Lexer.next_token lexer in
198
-
match tok.Quickjs.Token.tok with
199
-
| Quickjs.Token.Eof -> ()
200
-
| _ -> lex_all ()
201
-
in
202
-
lex_all ();
224
+
let parser = Quickjs.Parser.create lexer in
225
+
let _program = Quickjs.Parser.parse_program ~is_module parser in
203
226
(* If negative test expecting parse error, this is a failure *)
204
227
(match metadata.negative with
205
228
| Some { phase = "parse"; _ } -> Fail "Expected parse error but succeeded"
···
209
232
(* If negative test expecting this error, it's a pass *)
210
233
(match metadata.negative with
211
234
| Some { phase = "parse"; _ } -> Pass
212
-
| _ -> Fail (Quickjs.Lexer.show_error err)))
235
+
| _ -> Fail (Quickjs.Lexer.show_error err))
236
+
| Quickjs.Parser.Parse_error (err, _loc) ->
237
+
(* If negative test expecting this error, it's a pass *)
238
+
(match metadata.negative with
239
+
| Some { phase = "parse"; _ } -> Pass
240
+
| _ -> Fail (Quickjs.Parser.show_error err)))
213
241
with
214
242
| Sys_error msg -> Error msg
215
243
| exn -> Error (Printexc.to_string exn)
+12
test_temp.ml
+12
test_temp.ml
···
1
+
let () =
2
+
let code = {|let f = async function f(p, q) { };|} in
3
+
let lexer = Quickjs.Lexer.create ~filename:"test.js" ~content:code in
4
+
let parser = Quickjs.Parser.create lexer in
5
+
try
6
+
let _ = Quickjs.Parser.parse_program parser in
7
+
print_endline "Parse OK"
8
+
with
9
+
| Quickjs.Parser.Parse_error (err, _loc) ->
10
+
Printf.printf "Parse error: %s\n" (Quickjs.Parser.show_error err)
11
+
| Quickjs.Lexer.Lexer_error (err, _loc) ->
12
+
Printf.printf "Lex error: %s\n" (Quickjs.Lexer.show_error err)