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Remove allocations from case-insensitive comparison to keywords

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This commit is contained in:
Mark Rousskov
2025-01-11 12:11:42 -05:00
parent fb65a3ee57
commit 6f72f13436
2 changed files with 5 additions and 3 deletions
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5
compiler/rustc_parse/src/parser/mod.rs
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@@ -655,9 +655,9 @@ impl<'a> Parser<'a> {
fn check_keyword_case(&mut self, exp: ExpKeywordPair, case: Case) -> bool {
if self.check_keyword(exp) {
true
// Do an ASCII case-insensitive match, because all keywords are ASCII.
} else if case == Case::Insensitive
&& let Some((ident, IdentIsRaw::No)) = self.token.ident()
// Do an ASCII case-insensitive match, because all keywords are ASCII.
&& ident.as_str().eq_ignore_ascii_case(exp.kw.as_str())
{
true
@@ -689,7 +689,8 @@ impl<'a> Parser<'a> {
true
} else if case == Case::Insensitive
&& let Some((ident, IdentIsRaw::No)) = self.token.ident()
&& ident.as_str().to_lowercase() == exp.kw.as_str().to_lowercase()
// Do an ASCII case-insensitive match, because all keywords are ASCII.
&& ident.as_str().eq_ignore_ascii_case(exp.kw.as_str())
{
self.dcx().emit_err(errors::KwBadCase { span: ident.span, kw: exp.kw.as_str() });
self.bump();