SupportTest.h

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#ifndef INCL_MADARA_UTILITY_SUPPORT_TEST_H
#define INCL_MADARA_UTILITY_SUPPORT_TEST_H

#include <type_traits>
#include <initializer_list>

#define MADARA_MAKE_SUPPORT_TEST(name, var, expr) template <typename T> \
struct supports_##name##_impl { \
    template<typename U> static auto test(U *var) -> decltype((expr), std::true_type()); \
    template<typename U> static auto test(...) -> std::false_type; \
    using type = decltype(test<T>(0)); \
}; \
template <typename T> struct supports_##name : supports_##name##_impl<T>::type {}

#define MADARA_MAKE_VAL_SUPPORT_TEST(name, var, expr) template <typename T> \
struct supports_##name##_impl { \
    template<typename U> static auto test(U var) -> decltype((expr), std::true_type()); \
    template<typename U> static auto test(...) -> std::false_type; \
    using type = decltype(test<T>(std::declval<T>())); \
}; \
template <typename T> struct supports_##name : supports_##name##_impl<T>::type {}

#endif