[Bug]: GetClassDecls returns empty for template specializations

[keremsahn]

Description of bug

Because of clang's lazy instantiation klass->hasDefinition() returns false and implicit members are not created for template specializations.
From GetClassDecl function:

  if (CXXRD->hasDefinition())
    CXXRD = CXXRD->getDefinition();
  getSema().ForceDeclarationOfImplicitMembers(CXXRD);

Test:

TYPED_TEST(CPPINTEROP_TEST_MODE, FunctionReflection_GetClassDecls2) {
  std::vector<Decl*> Decls, SubDecls;
  std::string code = R"(template<typename T>
  class Klass {
    T value;
  };
 using KlassInt = Klass<int>;)";

  GetAllTopLevelDecls(code, Decls);

  std::vector<Cpp::TCppFunction_t> methods;
  Cpp::GetClassMethods(Decls[1], methods);

  EXPECT_EQ(methods.size(), 10);
}

this test fails because of this bug with this output:

[ RUN      ] CppInterOpTest/InProcessJIT.FunctionReflection_GetClassDecls2
/home/keremsahn/CppInterOp/unittests/CppInterOp/FunctionReflectionTest.cpp:352: 
Failure
Expected equality of these values:
  methods.size()
    Which is: 0
10

What operating system was you using when the bug occured?

Ubuntu

What is the architechture of the cpu on your system?

X86

What did you build CppInterOp against?

No response

[keremsahn]

@aaronj0 I will create a pr tomorrow to solve that via using RequireCompleteType