bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Emit suggestion when trying to write exclusive ranges as ..<

Browse source
This commit is contained in:
sjwang05 2023-12-22 21:56:58 -08:00
parent ca663b06c5
commit 6dd0772707
No known key found for this signature in database
GPG key ID: 8725BCA68FE25D6C
4 changed files with 117 additions and 7 deletions
Download patch file Download diff file Expand all files Collapse all files

10
compiler/rustc_parse/src/parser/expr.rs
View file

@ -483,7 +483,11 @@ impl<'a> Parser<'a> {
cur_op_span: Span,
) -> PResult<'a, P<Expr>> {
let rhs = if self.is_at_start_of_range_notation_rhs() {
Some(self.parse_expr_assoc_with(prec + 1, LhsExpr::NotYetParsed)?)
let maybe_lt = self.token.clone();
Some(
self.parse_expr_assoc_with(prec + 1, LhsExpr::NotYetParsed)
.map_err(|err| self.maybe_err_dotdotlt_syntax(maybe_lt, err))?,
)
} else {
None
};
@ -532,11 +536,13 @@ impl<'a> Parser<'a> {
let attrs = self.parse_or_use_outer_attributes(attrs)?;
self.collect_tokens_for_expr(attrs, |this, attrs| {
let lo = this.token.span;
let maybe_lt = this.look_ahead(1, |t| t.clone());
this.bump();
let (span, opt_end) = if this.is_at_start_of_range_notation_rhs() {
// RHS must be parsed with more associativity than the dots.
this.parse_expr_assoc_with(op.unwrap().precedence() + 1, LhsExpr::NotYetParsed)
.map(|x| (lo.to(x.span), Some(x)))?
.map(|x| (lo.to(x.span), Some(x)))
.map_err(|err| this.maybe_err_dotdotlt_syntax(maybe_lt, err))?
} else {
(lo, None)
};