54 lines
1.4 KiB
Rust
54 lines
1.4 KiB
Rust
//! Validity checking for weak lang items
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use crate::def_id::DefId;
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use crate::{lang_items, LangItem, LanguageItems};
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use rustc_ast as ast;
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use rustc_data_structures::fx::FxIndexMap;
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use rustc_span::symbol::{sym, Symbol};
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use std::sync::LazyLock;
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macro_rules! weak_lang_items {
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($($name:ident, $item:ident, $sym:ident;)*) => (
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pub static WEAK_ITEMS_REFS: LazyLock<FxIndexMap<Symbol, LangItem>> = LazyLock::new(|| {
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let mut map = FxIndexMap::default();
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$(map.insert(sym::$name, LangItem::$item);)*
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map
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});
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pub static WEAK_ITEMS_SYMBOLS: LazyLock<FxIndexMap<LangItem, Symbol>> = LazyLock::new(|| {
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let mut map = FxIndexMap::default();
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$(map.insert(LangItem::$item, sym::$sym);)*
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map
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});
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pub fn link_name(attrs: &[ast::Attribute]) -> Option<Symbol>
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{
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lang_items::extract(attrs).and_then(|(name, _)| {
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$(if name == sym::$name {
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Some(sym::$sym)
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} else)* {
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None
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}
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})
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}
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impl LanguageItems {
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pub fn is_weak_lang_item(&self, item_def_id: DefId) -> bool {
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let did = Some(item_def_id);
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$(self.$name() == did)||*
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}
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}
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) }
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weak_lang_items! {
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panic_impl, PanicImpl, rust_begin_unwind;
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eh_personality, EhPersonality, rust_eh_personality;
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eh_catch_typeinfo, EhCatchTypeinfo, rust_eh_catch_typeinfo;
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oom, Oom, rust_oom;
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}
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