gccrs: Lower IdentifierPattern's to_bind to HIR

gcc/rust/ChangeLog:

	* hir/rust-ast-lower-pattern.cc: Lower of IdentifierPattern's to_bind to HIR.
	* hir/rust-hir-dump.cc: Update IdentifierPattern's dump to properly show to_bind's full
	full properties.

Signed-off-by: Yap Zhi Heng <yapzhhg@gmail.com>

Author: Polygonalr

gcc/rust/hir/rust-ast-lower-pattern.cc

@@ -50,6 +50,14 @@ ASTLoweringPattern::visit (AST::IdentifierPattern &pattern)
 				 UNKNOWN_LOCAL_DEFID);
 
   std::unique_ptr<Pattern> to_bind;
+  if (pattern.has_pattern_to_bind ())
+
+    {
+      to_bind = std::unique_ptr<Pattern> (
+	Add commentMore actions
+
+	  ASTLoweringPattern::translate (pattern.get_pattern_to_bind ()));
+    }
   translated
     = new HIR::IdentifierPattern (mapping, pattern.get_ident (),
 				  pattern.get_locus (), pattern.get_is_ref (),

gcc/rust/hir/rust-hir-dump.cc

@@ -2114,7 +2114,7 @@ Dump::visit (IdentifierPattern &e)
   put_field ("mut", std::to_string (e.is_mut ()));
 
   if (e.has_pattern_to_bind ())
-    put_field ("to_bind", e.get_to_bind ().as_string ());
+    visit_field ("to_bind", e.get_to_bind ());
   else
     put_field ("to_bind", "none");