ast: Add Tokenstream visitors for loop expressions

Add the implementation of tokenstream dump for multiple loop
expressions.

gcc/rust/ChangeLog:

	* ast/rust-ast-tokenstream.cc (TokenStream::visit): Add
	visitors.
	(TokenStream::visit_loop_common): Merge common loop code.
	* ast/rust-ast-tokenstream.h: Add function prototypes.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/gcc/rust/ast/rust-ast-tokenstream.h b/gcc/rust/ast/rust-ast-tokenstream.h
index 58b90fb..c8a6982 100644
--- a/gcc/rust/ast/rust-ast-tokenstream.h
+++ b/gcc/rust/ast/rust-ast-tokenstream.h
@@ -94,6 +94,9 @@ private:
   void visit_function_common (std::unique_ptr<Type> &return_type,
 			      std::unique_ptr<BlockExpr> &block);
 
+  void visit_loop_common (BaseLoopExpr &expr);
+  void visit (LoopLabel &label);
+
   void visit (Literal &lit, Location locus = {});
 
   void visit (FunctionParam &param);