promote_const.h

#pragma once 
 
#include <cgv/type/cond/is_const.h>
#include <cgv/type/func/drop_const.h>
#include <cgv/type/func/make_const.h>
#include <cgv/type/ctrl/if_.h>
 
namespace cgv {
    namespace type {
        namespace func {
            template <typename T1, typename T2>
            struct promote_const : public
                ctrl::if_<cond::is_const<T1>::value,
                          typename make_const<T2>::type,
                          typename drop_const<T2>::type> {};
        }
    }
}