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

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

1 files changed, 1 insertions, 3 deletions

diff --git a/compiler/rustc_parse/src/parser/expr.rs b/compiler/rustc_parse/src/parser/expr.rs
index 9ae3ef6172c..5898c6565e6 100644
--- a/compiler/rustc_parse/src/parser/expr.rs
+++ b/compiler/rustc_parse/src/parser/expr.rs
@@ -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)))