From 218caa410aa38c29984be31a5229b9fa717560ee Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:19:13 +0200
Subject: Merging upstream version 1.68.2+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 compiler/rustc_parse/src/parser/pat.rs | 42 ++++++++++++++++------------------
 1 file changed, 20 insertions(+), 22 deletions(-)

(limited to 'compiler/rustc_parse/src/parser/pat.rs')

diff --git a/compiler/rustc_parse/src/parser/pat.rs b/compiler/rustc_parse/src/parser/pat.rs
index cbeec951e..e73a17ced 100644
--- a/compiler/rustc_parse/src/parser/pat.rs
+++ b/compiler/rustc_parse/src/parser/pat.rs
@@ -411,16 +411,20 @@ impl<'a> Parser<'a> {
         {
             // Recover a `'a` as a `'a'` literal
             let lt = self.expect_lifetime();
-            let lit = self.recover_unclosed_char(lt.ident, |self_| {
-                let expected = expected.unwrap_or("pattern");
-                let msg =
-                    format!("expected {}, found {}", expected, super::token_descr(&self_.token));
+            let (lit, _) =
+                self.recover_unclosed_char(lt.ident, Parser::mk_token_lit_char, |self_| {
+                    let expected = expected.unwrap_or("pattern");
+                    let msg = format!(
+                        "expected {}, found {}",
+                        expected,
+                        super::token_descr(&self_.token)
+                    );
 
-                let mut err = self_.struct_span_err(self_.token.span, &msg);
-                err.span_label(self_.token.span, format!("expected {}", expected));
-                err
-            });
-            PatKind::Lit(self.mk_expr(lo, ExprKind::Lit(lit.token_lit)))
+                    let mut err = self_.struct_span_err(self_.token.span, &msg);
+                    err.span_label(self_.token.span, format!("expected {}", expected));
+                    err
+                });
+            PatKind::Lit(self.mk_expr(lo, ExprKind::Lit(lit)))
         } else {
             // Try to parse everything else as literal with optional minus
             match self.parse_literal_maybe_minus() {
@@ -465,7 +469,7 @@ impl<'a> Parser<'a> {
     /// Try to recover the more general form `intersect ::= $pat_lhs @ $pat_rhs`.
     ///
     /// Allowed binding patterns generated by `binding ::= ref? mut? $ident @ $pat_rhs`
-    /// should already have been parsed by now  at this point,
+    /// should already have been parsed by now at this point,
     /// if the next token is `@` then we can try to parse the more general form.
     ///
     /// Consult `parse_pat_ident` for the `binding` grammar.
@@ -487,17 +491,6 @@ impl<'a> Parser<'a> {
 
         if let PatKind::Ident(_, _, sub @ None) = &mut rhs.kind {
             // The user inverted the order, so help them fix that.
-            let mut applicability = Applicability::MachineApplicable;
-            // FIXME(bindings_after_at): Remove this code when stabilizing the feature.
-            lhs.walk(&mut |p| match p.kind {
-                // `check_match` is unhappy if the subpattern has a binding anywhere.
-                PatKind::Ident(..) => {
-                    applicability = Applicability::MaybeIncorrect;
-                    false // Short-circuit.
-                }
-                _ => true,
-            });
-
             let lhs_span = lhs.span;
             // Move the LHS into the RHS as a subpattern.
             // The RHS is now the full pattern.
@@ -506,7 +499,12 @@ impl<'a> Parser<'a> {
             self.struct_span_err(sp, "pattern on wrong side of `@`")
                 .span_label(lhs_span, "pattern on the left, should be on the right")
                 .span_label(rhs.span, "binding on the right, should be on the left")
-                .span_suggestion(sp, "switch the order", pprust::pat_to_string(&rhs), applicability)
+                .span_suggestion(
+                    sp,
+                    "switch the order",
+                    pprust::pat_to_string(&rhs),
+                    Applicability::MachineApplicable,
+                )
                 .emit();
         } else {
             // The special case above doesn't apply so we may have e.g. `A(x) @ B(y)`.
-- 
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