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Merge pull request #19127 from ChayimFriedman2/different-generic-args

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feat: Refactor path lowering and serve a new path diagnostic
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Lukas Wirth 2025-02-17 08:30:10 +00:00 • committed by GitHub
commit 09db657439
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19 changed files with 1222 additions and 1144 deletions
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33
crates/intern/src/symbol/symbols.rs
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@ -13,15 +13,35 @@ use crate::{
macro_rules! define_symbols {
(@WITH_NAME: $($alias:ident = $value:literal,)* @PLAIN: $($name:ident,)*) => {
// Ideally we would be emitting `const` here, but then we no longer have stable addresses
// which is what we are relying on for equality! In the future if consts can refer to
// statics we should swap these for `const`s and have the string literal being pointed
// to be statics to refer to such that their address is stable.
// We define symbols as both `const`s and `static`s because some const code requires const symbols,
// but code from before the transition relies on the lifetime of the predefined symbols and making them
// `const`s make it error (because now they're temporaries). In the future we probably should only
// use consts.
/// Predefined symbols as `const`s (instead of the default `static`s).
pub mod consts {
use super::{Symbol, TaggedArcPtr};
// The strings should be in `static`s so that symbol equality holds.
$(
pub const $name: Symbol = {
static SYMBOL_STR: &str = stringify!($name);
Symbol { repr: TaggedArcPtr::non_arc(&SYMBOL_STR) }
};
)*
$(
pub const $alias: Symbol = {
static SYMBOL_STR: &str = $value;
Symbol { repr: TaggedArcPtr::non_arc(&SYMBOL_STR) }
};
)*
}
$(
pub static $name: Symbol = Symbol { repr: TaggedArcPtr::non_arc(&stringify!($name)) };
pub static $name: Symbol = consts::$name;
)*
$(
pub static $alias: Symbol = Symbol { repr: TaggedArcPtr::non_arc(&$value) };
pub static $alias: Symbol = consts::$alias;
)*
@ -428,6 +448,7 @@ define_symbols! {
rustc_layout_scalar_valid_range_start,
rustc_legacy_const_generics,
rustc_macro_transparency,
rustc_paren_sugar,
rustc_reallocator,
rustc_reservation_impl,
rustc_safe_intrinsic,