Fixed a crash when parsing unnamed declarations in name-spaces.

Signed-off-by: Dimitar Dobrev <dpldobrev@protonmail.com>

src/CppParser/Parser.cpp

@@ -3811,8 +3811,7 @@ Declaration* Parser::WalkDeclaration(const clang::Decl* D)
 
         for (auto D : ND->decls())
         {
-            auto ND = dyn_cast<NamedDecl>(D);
-            if (IsSupported(ND))
+            if (!isa<NamedDecl>(D) || IsSupported(cast<NamedDecl>(D)))
                 Decl = WalkDeclarationDef(D);
         }
 

tests/Common/Common.h

@@ -1412,3 +1412,9 @@ struct TemplateWithUsingTemplateMember
     UsingTemplatePtr<TemplateWithUsingTemplateMember> _Ref;
 };
 
+namespace hasUnnamedDecl
+{
+    extern "C"
+    {
+    }
+}