cpp11.h

#pragma once
#include "../min-cpp-version/cpp03.h"
 
#if __cplusplus < 201103L && (!defined(_MSVC_LANG) || _MSVC_LANG < 201103L)
#error "This file requires compiler and library support for the ISO C++ 2011 standard."
#endif
 
namespace ghassanpl
{
#if defined(__cpp_lib_type_identity) && __cpp_lib_type_identity >= 201806L
    using std::type_identity;
    using std::type_identity_t;
#else
    template <class T>
    struct type_identity { using type = T; };
 
    template <class T>
    using type_identity_t = typename type_identity<T>::type;
#endif
 
    template <typename T>
    constexpr T default_value() noexcept { return T{}; }
    template <>
    constexpr void default_value<void>() noexcept { }
}