Function pointer_test

examples/include/imgui_app.cpp:375–403

======================================== Pointer Test ========================================

// Pointer Test
// ========================================
static void pointer_test() {
	const std::string name = "Pointer";

	ImGui::SeparatorText((name + "*").c_str());
	ImGui::PushID((name + "*").c_str());
	ImGui::Indent();

	static int my_value = 42;
	static int* invalid_ptr = nullptr;
	static int* my_ptr = invalid_ptr;

	ImGui::Text("Pointer - nullptr");
	HelpMarker("Pointer is nullptr, nothing to edit");
	{
		ImReflect::Input("my_ptr", invalid_ptr);
	}

	ImGui::NewLine();

	ImGui::Text("Pointer - valid");
	HelpMarker("Pointer is valid, you can edit the value it points to");
	{
		my_ptr = &my_value;
		ImReflect::Input("my_ptr", my_ptr);
	}

	ImGui::Unindent();
	ImGui::PopID();
}

// ========================================
// Simple Test