[gcc r13-6235] gccrs: ast: Dump impl trait type

[Arthur Cohen]

https://gcc.gnu.org/g:638f65b20832751c8f32e7bac8411fb7cd2ac60f

commit r13-6235-g638f65b20832751c8f32e7bac8411fb7cd2ac60f
Author: Jakub Dupak <dev@jakubdupak.com>
Date:   Tue Nov 15 15:44:48 2022 +0100

    gccrs: ast: Dump impl trait type
    
    gcc/rust/ChangeLog:
    
            * ast/rust-ast-dump.cc (Dump::visit): Add missing visitor.
    
    Signed-off-by: Jakub Dupak <dev@jakubdupak.com>

Diff:
---
 gcc/rust/ast/rust-ast-dump.cc | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/gcc/rust/ast/rust-ast-dump.cc b/gcc/rust/ast/rust-ast-dump.cc
index 2f01c72460d..1d593d4b749 100644
--- a/gcc/rust/ast/rust-ast-dump.cc
+++ b/gcc/rust/ast/rust-ast-dump.cc
@@ -1610,8 +1610,16 @@ Dump::visit (TraitBound &bound)
 }
 
 void
-Dump::visit (ImplTraitType &)
-{}
+Dump::visit (ImplTraitType &type)
+{
+  // Syntax:
+  //    impl TypeParamBounds
+  // TypeParamBounds :
+  //    TypeParamBound ( + TypeParamBound )* +?
+
+  stream << "impl ";
+  visit_items_joined_by_separator(type.get_type_param_bounds (), " + ");
+}
 
 void
 Dump::visit (TraitObjectType &)