gccrs: Add IdentifierPattern subpattern support for ClosureParamInfer

gcc/rust/ChangeLog:

	* typecheck/rust-hir-type-check-pattern.cc(ClosureParamInfer(IdentifierPattern)):
	Resolve subpattern types for IdentifierPattern.

Signed-off-by: Yap Zhi Heng <[email protected]>

Author: Polygonalr

gcc/rust/typecheck/rust-hir-type-check-pattern.cc

@@ -814,6 +814,11 @@ ClosureParamInfer::visit (HIR::WildcardPattern &pattern)
 void
 ClosureParamInfer::visit (HIR::IdentifierPattern &pattern)
 {
+  if (pattern.has_subpattern ())
+    {
+      ClosureParamInfer::Resolve (pattern.get_subpattern ());
+    }
+
   HirId id = pattern.get_mappings ().get_hirid ();
   infered = new TyTy::InferType (id, TyTy::InferType::InferTypeKind::GENERAL,
 				 TyTy::InferType::TypeHint::Default (),