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Auto merge of #115371 - matthewjasper:if-let-guard-parsing, r=cjgillot

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Make if let guard parsing consistent with normal guards

- Add tests that struct expressions are not allowed in `if let` and `while let` (no change, consistent with `if` and `while`)
- Allow struct expressions in `if let` guards (consistent with `if` guards).

r? `@cjgillot`

Closes #93817
cc #51114
This commit is contained in:
bors 2023-09-06 00:46:21 +00:00
commit 25283f4e13
6 changed files with 48 additions and 5 deletions
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4
compiler/rustc_parse/src/parser/expr.rs
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@ -2477,9 +2477,7 @@ impl<'a> Parser<'a> {
} else {
self.expect(&token::Eq)?;
}
let expr = self.with_res(self.restrictions | Restrictions::NO_STRUCT_LITERAL, |this| {
this.parse_expr_assoc_with(1 + prec_let_scrutinee_needs_par(), None.into())
})?;
let expr = self.parse_expr_assoc_with(1 + prec_let_scrutinee_needs_par(), None.into())?;
let span = lo.to(expr.span);
self.sess.gated_spans.gate(sym::let_chains, span);
Ok(self.mk_expr(span, ExprKind::Let(pat, expr, span)))