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Recover from missing expression in for loop

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This commit is contained in:
Obei Sideg 2023-02-03 12:23:37 +03:00
parent 7f97aeaf73
commit 7a75278836
3 changed files with 30 additions and 0 deletions
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15
compiler/rustc_parse/src/parser/expr.rs
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@ -2471,6 +2471,21 @@ impl<'a> Parser<'a> {
let pat = self.recover_parens_around_for_head(pat, begin_paren);
// Recover from missing expression in `for` loop
if matches!(expr.kind, ExprKind::Block(..))
&& !matches!(self.token.kind, token::OpenDelim(token::Delimiter::Brace))
&& self.may_recover()
{
self.sess
.emit_err(errors::MissingExpressionInForLoop { span: expr.span.shrink_to_lo() });
let err_expr = self.mk_expr(expr.span, ExprKind::Err);
let block = self.mk_block(vec![], BlockCheckMode::Default, self.prev_token.span);
return Ok(self.mk_expr(
lo.to(self.prev_token.span),
ExprKind::ForLoop(pat, err_expr, block, opt_label),
));
}
let (attrs, loop_block) = self.parse_inner_attrs_and_block()?;
let kind = ExprKind::ForLoop(pat, expr, loop_block, opt_label);