[gcc/devel/rust/master] parser: Fix parsing closure parameter

[gcc/devel/rust/master] parser: Fix parsing closure parameter

[Thomas Schwinge]

https://gcc.gnu.org/g:a4c851df0358389970ffe3ce1ad495954729fc5f

commit a4c851df0358389970ffe3ce1ad495954729fc5f
Author: goar5670 <mahadelr19@gmail.com>
Date:   Thu Mar 2 21:34:44 2023 +0300

    parser: Fix parsing closure parameter
    
    gcc/rust/ChangeLog:
    
            * parse/rust-parse-impl.h (Parser::parse_closure_param):
            Replace parse_pattern with parse_pattern_no_alt.
    
    gcc/testsuite/ChangeLog:
    
            * rust/compile/closure_no_type_anno.rs: New test.
    
    Signed-off-by: Mahmoud Mohamed <mahadelr19@gmail.com>

Diff:
---
 gcc/rust/parse/rust-parse-impl.h                   | 2 +-
 gcc/testsuite/rust/compile/closure_no_type_anno.rs | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/gcc/rust/parse/rust-parse-impl.h b/gcc/rust/parse/rust-parse-impl.h
index 46704111f37..9b2bea73c99 100644
--- a/gcc/rust/parse/rust-parse-impl.h
+++ b/gcc/rust/parse/rust-parse-impl.h
@@ -9055,7 +9055,7 @@ Parser<ManagedTokenSource>::parse_closure_param ()
   AST::AttrVec outer_attrs = parse_outer_attributes ();
 
   // parse pattern (which is required)
-  std::unique_ptr<AST::Pattern> pattern = parse_pattern ();
+  std::unique_ptr<AST::Pattern> pattern = parse_pattern_no_alt ();
   if (pattern == nullptr)
     {
       // not necessarily an error
diff --git a/gcc/testsuite/rust/compile/closure_no_type_anno.rs b/gcc/testsuite/rust/compile/closure_no_type_anno.rs
new file mode 100644
index 00000000000..beade7607f0
--- /dev/null
+++ b/gcc/testsuite/rust/compile/closure_no_type_anno.rs
@@ -0,0 +1,5 @@
+// { dg-additional-options "-fsyntax-only" }
+
+pub fn foo() {
+  let a = |_| 15;
+}