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Suggest using raw identifiers in 2018 edition when using keywords

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This commit is contained in:
Esteban Küber 2018-12-29 17:19:22 -08:00
parent 433ef826f0
commit 833f12ebd7
6 changed files with 47 additions and 8 deletions
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13
src/libsyntax/parse/parser.rs
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@ -798,7 +798,18 @@ impl<'a> Parser<'a> {
let mut err = self.struct_span_err(self.span,
&format!("expected identifier, found {}",
self.this_token_descr()));
if let Some(token_descr) = self.token_descr() {
if let (true, token::Ident(ref s, false), true) = (
self.span.rust_2018(),
&self.token,
self.token.is_used_keyword() || self.token.is_unused_keyword(),
) {
err.span_suggestion_with_applicability(
self.span,
"you can escape reserved keywords to use them as identifiers",
format!("r#{}", s.to_string()),
Applicability::MaybeIncorrect,
);
} else if let Some(token_descr) = self.token_descr() {
err.span_label(self.span, format!("expected identifier, found {}", token_descr));
} else {
err.span_label(self.span, "expected identifier");