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symbols: add is_preinterned fn to check if symbol was preinterned in compiler

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This commit is contained in:
klensy 2022-08-20 15:13:41 +03:00
parent 36e530cb08
commit 0016356f2b
2 changed files with 6 additions and 1 deletions
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2
compiler/rustc_macros/src/symbols.rs
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@ -195,10 +195,10 @@ fn symbols_with_errors(input: TokenStream) -> (TokenStream, Vec<syn::Error>) {
#n, #n,
}); });
} }
let _ = counter; // for future use
let output = quote! { let output = quote! {
const SYMBOL_DIGITS_BASE: u32 = #digits_base; const SYMBOL_DIGITS_BASE: u32 = #digits_base;
const PREINTERNED_SYMBOLS_COUNT: u32 = #counter;
#[doc(hidden)] #[doc(hidden)]
#[allow(non_upper_case_globals)] #[allow(non_upper_case_globals)]

5
compiler/rustc_span/src/symbol.rs
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@ -2027,6 +2027,11 @@ impl Symbol {
pub fn can_be_raw(self) -> bool { pub fn can_be_raw(self) -> bool {
self != kw::Empty && self != kw::Underscore && !self.is_path_segment_keyword() self != kw::Empty && self != kw::Underscore && !self.is_path_segment_keyword()
} }
/// Is this symbol was interned in compiler's `symbols!` macro
pub fn is_preinterned(self) -> bool {
self.as_u32() < PREINTERNED_SYMBOLS_COUNT
}
} }
impl Ident { impl Ident {