Mirror: The magical sticky regex-based parser generator 🧙
Remove special logic for "+" quantifier
Instead it'll generate code for `${x} ${x}*` on the fly.
+38
-49
+33
-29
src/babel/__snapshots__/plugin.test.js.snap
+33
-29
src/babel/__snapshots__/plugin.test.js.snap
···
185
185
break alt_3;
186
186
}
187
187
188
-
loop_3: for (var j3 = 0; 1; j3++) {
188
+
if ((x = _node_expression3(state)) != null) {} else {
189
+
state.y = y1;
190
+
state.x = x1;
191
+
node.length = ln2;
192
+
return;
193
+
}
194
+
195
+
loop_3: for (;;) {
189
196
var y3 = state.y,
190
197
x3 = state.x;
191
198
192
199
if ((x = _node_expression3(state)) != null) {} else {
193
-
if (j3) {
194
-
state.y = y3;
195
-
state.x = x3;
196
-
break loop_3;
197
-
} else {}
198
-
199
-
state.y = y1;
200
-
state.x = x1;
201
-
node.length = ln2;
202
-
return;
200
+
state.y = y3;
201
+
state.x = x3;
202
+
break loop_3;
203
203
}
204
204
}
205
205
}
···
269
269
var y2 = state.y,
270
270
x2 = state.x;
271
271
272
-
loop_2: for (var j2 = 0; 1; j2++) {
272
+
if ((x = _node_expression(state)) != null) {
273
+
node.push(x);
274
+
} else {
275
+
state.y = y2;
276
+
state.x = x2;
277
+
break block_2;
278
+
}
279
+
280
+
loop_2: for (;;) {
273
281
var y2 = state.y,
274
282
x2 = state.x;
275
283
276
284
if ((x = _node_expression(state)) != null) {
277
285
node.push(x);
278
286
} else {
279
-
if (j2) {
280
-
state.y = y2;
281
-
state.x = x2;
282
-
break loop_2;
283
-
} else {}
284
-
285
287
state.y = y2;
286
288
state.x = x2;
287
-
break block_2;
289
+
break loop_2;
288
290
}
289
291
}
290
292
291
293
break alt_2;
292
294
}
293
295
294
-
loop_2: for (var j2 = 0; 1; j2++) {
296
+
if ((x = _node_expression2(state)) != null) {
297
+
node.push(x);
298
+
} else {
299
+
state.y = y1;
300
+
state.x = x1;
301
+
return;
302
+
}
303
+
304
+
loop_2: for (;;) {
295
305
var y2 = state.y,
296
306
x2 = state.x;
297
307
298
308
if ((x = _node_expression2(state)) != null) {
299
309
node.push(x);
300
310
} else {
301
-
if (j2) {
302
-
state.y = y2;
303
-
state.x = x2;
304
-
break loop_2;
305
-
} else {}
306
-
307
-
state.y = y1;
308
-
state.x = x1;
309
-
return;
311
+
state.y = y2;
312
+
state.x = x2;
313
+
break loop_2;
310
314
}
311
315
}
312
316
+5
-20
src/codegen.js
+5
-20
src/codegen.js
···
35
35
if ((${_match} = ${ast.expression.id}(${_state})) != null) {
36
36
${capture ? js`${_node}.push(${_match})` : ''}
37
37
} else {
38
-
${opts.onAbort}
39
38
${restoreIndex(opts.index)}
40
39
${restoreLength}
41
40
${opts.abort}
···
64
63
ast.expression ? astExpression(ast, depth, opts) : astGroup(ast, depth, opts);
65
64
66
65
const astQuantifier = (ast, depth, opts) => {
67
-
const { index, abort, onAbort } = opts;
66
+
const { index, abort } = opts;
68
67
const invert = `inv_${depth}`;
69
68
const loop = `loop_${depth}`;
70
-
const count = `j${depth}`;
71
69
72
70
opts = copy(opts);
73
71
if (ast.capture === '!') {
···
77
75
78
76
let child;
79
77
if (ast.quantifier === '+') {
80
-
opts.onAbort = js`
81
-
if (${count}) {
82
-
${restoreIndex(depth)}
83
-
break ${loop};
84
-
} else {
85
-
${onAbort}
86
-
}
87
-
`;
88
-
78
+
const starAst = copy(ast);
79
+
starAst.quantifier = '*';
89
80
child = js`
90
-
${loop}: for (var ${count} = 0; 1; ${count}++) {
91
-
${assignIndex(depth)}
92
-
${astChild(ast, depth, opts)}
93
-
}
81
+
${astChild(ast, depth, opts)}
82
+
${astQuantifier(starAst, depth, opts)}
94
83
`;
95
84
} else if (ast.quantifier === '*') {
96
85
opts.length = 0;
97
86
opts.index = depth;
98
87
opts.abort = js`break ${loop};`;
99
-
opts.onAbort = '';
100
88
101
89
child = js`
102
90
${loop}: for (;;) {
···
107
95
} else if (ast.quantifier === '?') {
108
96
opts.index = depth;
109
97
opts.abort = '';
110
-
opts.onAbort = '';
111
98
112
99
child = js`
113
100
${assignIndex(depth)}
···
149
136
childOpts = copy(opts);
150
137
childOpts.index = depth;
151
138
childOpts.abort = js`break ${block};`;
152
-
childOpts.onAbort = '';
153
139
}
154
140
155
141
let sequence = '';
···
188
174
${astSequence(ast, 2, {
189
175
index: 1,
190
176
length: 0,
191
-
onAbort: '',
192
177
abort: js`return;`,
193
178
capture: true,
194
179
})}