[gcc r14-7559] gccrs: Fix "default unsafe fn ..." parsing

[Arthur Cohen]

https://gcc.gnu.org/g:af874e4bcd601e2fac3598c122641db6f3b1d95c

commit r14-7559-gaf874e4bcd601e2fac3598c122641db6f3b1d95c
Author: Owen Avery <powerboat9.gamer@gmail.com>
Date:   Sun May 7 20:29:15 2023 -0400

    gccrs: Fix "default unsafe fn ..." parsing
    
    gcc/rust/ChangeLog:
    
            * parse/rust-parse-impl.h
            (Parser::parse_trait_impl_function_or_method):
            Parse function/method qualifiers after "default".
    
    gcc/testsuite/ChangeLog:
    
            * rust/compile/parse_specialization.rs:
            Add "default unsafe" coverage.
    
    Signed-off-by: Owen Avery <powerboat9.gamer@gmail.com>

Diff:
---
 gcc/rust/parse/rust-parse-impl.h                   | 6 +++---
 gcc/testsuite/rust/compile/parse_specialization.rs | 2 ++
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/gcc/rust/parse/rust-parse-impl.h b/gcc/rust/parse/rust-parse-impl.h
index 042018de9a2..1addbe95176 100644
--- a/gcc/rust/parse/rust-parse-impl.h
+++ b/gcc/rust/parse/rust-parse-impl.h
@@ -5686,9 +5686,6 @@ Parser<ManagedTokenSource>::parse_trait_impl_function_or_method (
   // - template?
   Location locus = lexer.peek_token ()->get_locus ();
 
-  // parse function or method qualifiers
-  AST::FunctionQualifiers qualifiers = parse_function_qualifiers ();
-
   auto is_default = false;
   auto t = lexer.peek_token ();
   if (t->get_id () == IDENTIFIER && t->get_str () == "default")
@@ -5697,6 +5694,9 @@ Parser<ManagedTokenSource>::parse_trait_impl_function_or_method (
       lexer.skip_token ();
     }
 
+  // parse function or method qualifiers
+  AST::FunctionQualifiers qualifiers = parse_function_qualifiers ();
+
   skip_token (FN_TOK);
 
   // parse function or method name
diff --git a/gcc/testsuite/rust/compile/parse_specialization.rs b/gcc/testsuite/rust/compile/parse_specialization.rs
index 5de1f6a6f96..de50b5bedff 100644
--- a/gcc/testsuite/rust/compile/parse_specialization.rs
+++ b/gcc/testsuite/rust/compile/parse_specialization.rs
@@ -2,10 +2,12 @@
 
 trait Foo {
     fn bar();
+    unsafe fn bar_u();
 }
 
 struct S;
 
 impl Foo for S {
     default fn bar() {}
+    default unsafe fn bar_u() {}
 }