#pragma once #include "macros1.h" #include <utility> #include <type_traits> // before C++20 namespace cxx20_compat { template<typename T> struct remove_cvref { using type = std::remove_cv_t<std::remove_reference_t<T>>; }; } // ns cxx20_compat template<typename t> using remove_cvref_t = typename cxx20_compat::remove_cvref<t>::type; template<typename t> using to_const_ref_t = std::add_lvalue_reference_t<std::add_const_t<remove_cvref_t<t>>>; template<typename t> using cv_qualified = std::conditional_t<sizeof(remove_cvref_t<t>) <= sizeof(void*)*4 && std::is_trivially_copyable_v<t> || std::is_fundamental_v<remove_cvref_t<t>>, remove_cvref_t<t>, to_const_ref_t<t>>;