[gcc r13-6172] gccrs: ast: Add accept_vis() method to `GenericArg`

[gcc r13-6172] gccrs: ast: Add accept_vis() method to `GenericArg`

[Arthur Cohen]

https://gcc.gnu.org/g:2f1035fc91ce1b9dd6e08d47befefff6b2b878db

commit r13-6172-g2f1035fc91ce1b9dd6e08d47befefff6b2b878db
Author: Arthur Cohen <arthur.cohen@embecosm.com>
Date:   Tue Oct 11 15:54:07 2022 +0200

    gccrs: ast: Add accept_vis() method to `GenericArg`
    
    gcc/rust/ChangeLog:
    
            * ast/rust-path.h: Add `accept_vis` method to `GenericArg` class.

Diff:
---
 gcc/rust/ast/rust-path.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/gcc/rust/ast/rust-path.h b/gcc/rust/ast/rust-path.h
index b12e4c2bafa..9683ad6ad68 100644
--- a/gcc/rust/ast/rust-path.h
+++ b/gcc/rust/ast/rust-path.h
@@ -207,6 +207,23 @@ public:
   Kind get_kind () const { return kind; }
   const Location &get_locus () const { return locus; }
 
+  void accept_vis (AST::ASTVisitor &visitor)
+  {
+    switch (get_kind ())
+      {
+      case Kind::Const:
+	get_expression ()->accept_vis (visitor);
+	break;
+      case Kind::Type:
+	get_type ()->accept_vis (visitor);
+	break;
+      case Kind::Either:
+	break;
+      case Kind::Error:
+	gcc_unreachable ();
+      }
+  }
+
   std::unique_ptr<Expr> &get_expression ()
   {
     rust_assert (kind == Kind::Const);