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rc and cr more clear error message

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This commit is contained in:
Kivooeo
2025-04-23 03:06:07 +05:00
parent b8005bff32
commit 44b19e5fe7
5 changed files with 41 additions and 2 deletions
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4
compiler/rustc_parse/src/lexer/mod.rs
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@@ -256,7 +256,6 @@ impl<'psess, 'src> Lexer<'psess, 'src> {
let lit_start = start + BytePos(prefix_len);
self.pos = lit_start;
self.cursor = Cursor::new(&str_before[prefix_len as usize..]);
self.report_unknown_prefix(start);
let prefix_span = self.mk_sp(start, lit_start);
return (Token::new(self.ident(start), prefix_span), preceded_by_whitespace);
@@ -789,13 +788,14 @@ impl<'psess, 'src> Lexer<'psess, 'src> {
fn report_unknown_prefix(&self, start: BytePos) {
let prefix_span = self.mk_sp(start, self.pos);
let prefix = self.str_from_to(start, self.pos);
let expn_data = prefix_span.ctxt().outer_expn_data();
if expn_data.edition.at_least_rust_2021() {
// In Rust 2021, this is a hard error.
let sugg = if prefix == "rb" {
Some(errors::UnknownPrefixSugg::UseBr(prefix_span))
} else if prefix == "rc" {
Some(errors::UnknownPrefixSugg::UseCr(prefix_span))
} else if expn_data.is_root() {
if self.cursor.first() == '\''
&& let Some(start) = self.last_lifetime