Game stats that reset every frame, inspired by immediate mode GUI.
gamedev
bevy
stats
Fixed attributes.
+30
-15
+30
-15
immediate_stats_macros/src/lib.rs
+30
-15
immediate_stats_macros/src/lib.rs
···
8
8
use proc_macro2::{Span, TokenStream};
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use quote::{ToTokens, quote};
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use syn::spanned::Spanned;
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use syn::{Data, DataEnum, DataStruct, DeriveInput, Field, Ident, Index, Type, parse_macro_input};
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use syn::{Data, DataEnum, DataStruct, DeriveInput, Field, Ident, Index, parse_macro_input};
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#[proc_macro_derive(StatContainer, attributes(stat, stat_ignore, add_component))]
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#[proc_macro_error]
···
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method.into()
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}
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-
#[derive(FromField)] // Todo Implement manually to allow for naked attributes.
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-
#[darling(attributes(stat, stat_ignore))]
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struct FieldState {
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+
#[derive(Default)]
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struct FieldOptions {
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ident: Option<Ident>,
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ty: Type,
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#[darling(default, rename = "stat")]
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stat_type: bool,
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include: bool,
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#[darling(default, rename = "stat")]
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exclude: bool,
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}
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impl FromField for FieldOptions {
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fn from_field(field: &Field) -> darling::Result<Self> {
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let mut options = FieldOptions {
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ident: field.ident.clone(),
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..Self::default()
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};
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options.stat_type = field.ty.to_token_stream().to_string().contains("Stat");
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+
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for attribute in &field.attrs {
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if let Some(ident) = attribute.path().get_ident() {
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match ident.to_string().as_str() {
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// Todo Warn about double tags.
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"stat" => options.include = true,
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"stat_ignore" => options.exclude = true,
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_ => continue,
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}
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}
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}
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Ok(options)
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}
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}
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+
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fn struct_fields(s: DataStruct) -> darling::Result<TokenStream> {
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let mut tokens = TokenStream::new();
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for (index, field) in s.fields.iter().enumerate() {
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-
let field_state = FieldState::from_field(&field)?;
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-
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let is_stat_type = field_state
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.ty
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.to_token_stream()
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.to_string()
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.contains("Stat");
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let field_state = FieldOptions::from_field(&field)?;
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if (field_state.include || is_stat_type) && !field_state.exclude {
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if (field_state.include || field_state.stat_type) && !field_state.exclude {
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if let Some(ident) = field_state.ident {
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tokens.extend(quote! {
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self.#ident.reset_modifiers();