bjoernager/rust
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Cleanup weak lang items

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This commit is contained in:
Cameron Steffen 2022-10-26 16:18:59 -05:00
parent 1e349fb0dd
commit 6621279a75
6 changed files with 38 additions and 63 deletions
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1
compiler/rustc_hir/src/lib.rs
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@ -5,7 +5,6 @@
#![feature(associated_type_defaults)]
#![feature(closure_track_caller)]
#![feature(const_btree_len)]
#![feature(once_cell)]
#![feature(min_specialization)]
#![feature(never_type)]
#![feature(rustc_attrs)]

56
compiler/rustc_hir/src/weak_lang_items.rs
View file

@ -1,53 +1,31 @@
//! Validity checking for weak lang items
use crate::def_id::DefId;
use crate::{lang_items, LangItem, LanguageItems};
use crate::LangItem;
use rustc_ast as ast;
use rustc_data_structures::fx::FxIndexMap;
use rustc_span::symbol::{sym, Symbol};
use std::sync::LazyLock;
macro_rules! weak_lang_items {
($($name:ident, $item:ident, $sym:ident;)*) => (
($($item:ident, $sym:ident;)*) => {
pub static WEAK_LANG_ITEMS: &[LangItem] = &[$(LangItem::$item,)*];
pub static WEAK_ITEMS_REFS: LazyLock<FxIndexMap<Symbol, LangItem>> = LazyLock::new(|| {
let mut map = FxIndexMap::default();
$(map.insert(sym::$name, LangItem::$item);)*
map
});
impl LangItem {
pub fn is_weak(self) -> bool {
matches!(self, $(LangItem::$item)|*)
}
pub static WEAK_ITEMS_SYMBOLS: LazyLock<FxIndexMap<LangItem, Symbol>> = LazyLock::new(|| {
let mut map = FxIndexMap::default();
$(map.insert(LangItem::$item, sym::$sym);)*
map
});
pub fn link_name(attrs: &[ast::Attribute]) -> Option<Symbol>
{
lang_items::extract(attrs).and_then(|(name, _)| {
$(if name == sym::$name {
Some(sym::$sym)
} else)* {
None
pub fn link_name(self) -> Option<Symbol> {
match self {
$( LangItem::$item => Some(sym::$sym),)*
_ => None,
}
}
}
})
}
impl LanguageItems {
pub fn is_weak_lang_item(&self, item_def_id: DefId) -> bool {
let did = Some(item_def_id);
$(self.$name() == did)||*
}
}
) }
weak_lang_items! {
panic_impl, PanicImpl, rust_begin_unwind;
eh_personality, EhPersonality, rust_eh_personality;
eh_catch_typeinfo, EhCatchTypeinfo, rust_eh_catch_typeinfo;
oom, Oom, rust_oom;
PanicImpl, rust_begin_unwind;
EhPersonality, rust_eh_personality;
EhCatchTypeinfo, rust_eh_catch_typeinfo;
Oom, rust_oom;
}