Proxy/Wrappers for mulitple defines #34
Description
Hi, I want to define different members for specific use cases.
For example:
template<typename T>
struct _SerializeProxy { T& self; };
struct Transform {
private:
BEFRIEND_VISITABLE();
glm::vec3 m_position;
glm::vec3 m_scale;
glm::quat m_rotation;
};
// Default, all values
VISITABLE_STRUCT(Transform, m_position, m_scale, m_rotation);
// Define only the values for serialization, so only pos and scale
VISITABLE_STRUCT(_SerializeProxy<Transform>, m_position, m_scale);In this example, I thought of using a proxy so I could differentiate when I want all of the member variables or only the seiraliza ones. Sadly this doesn't work since:
1>E:\GithubProjects\svh\include\components\transform.hpp(27,1): error C2039: 'm_position': is not a member of '_SerializeProxy<Transform>'
1>E:\GithubProjects\svh\include\components\transform.hpp(27,1): message : see declaration of '_SerializeProxy<Transform>'
1>E:\GithubProjects\svh\include\components\transform.hpp(27,1): error C2065: 'm_position': undeclared identifier
1>E:\GithubProjects\svh\include\components\transform.hpp(27,1): error C2039: 'm_scale': is not a member of '_SerializeProxy<Transform>'
1>E:\GithubProjects\svh\include\components\transform.hpp(27,1): message : see declaration of '_SerializeProxy<Transform>'
1>E:\GithubProjects\svh\include\components\transform.hpp(27,1): error C2065: 'm_scale': undeclared identifier
1>E:\GithubProjects\svh\include\components\transform.hpp(27,1): error C3615: constexpr function 'visit_struct::traits::visitable<_SerializeProxy<Transform>,void>::get_pointer' cannot result in a constant expression
1>E:\GithubProjects\svh\include\components\transform.hpp(27,1): message : failure was because type 'unknown-type' is not a literal type
1>E:\GithubProjects\svh\include\components\transform.hpp(27): message : failure was caused by control reaching the end of a constexpr function
1>E:\GithubProjects\svh\include\components\transform.hpp(27,1): error C3615: constexpr function 'visit_struct::traits::visitable<_SerializeProxy<Transform>,void>::get_accessor' cannot result in a constant expression
1>E:\GithubProjects\svh\include\components\transform.hpp(27,1): message : failure was because type 'unknown-type' is not a literal type
1>E:\GithubProjects\svh\include\components\transform.hpp(27): message : failure was caused by control reaching the end of a constexpr function
1>Done building project "svh.vcxproj" -- FAILED.
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
========== Build completed at 23:57 and took 00,484 seconds ==========
I tried defining it like this:
VISITABLE_STRUCT(_SerializeProxy<Transform>, self.m_position, self.m_scale);But that doesn't work either.
Which all makes sense, but is there a way to achieve something like this?