eonix/gblibstdc++/include/memory

#ifndef __GBLIBCPP_MEMORY__
#define __GBLIBCPP_MEMORY__

#include <type_traits>
#include <utility>

namespace std {

template <typename T>
constexpr enable_if_t<is_function_v<remove_reference_t<T>>, T*>
addressof(T& arg) noexcept
{
    return &arg;
}

template <typename T>
constexpr enable_if_t<!is_function_v<remove_reference_t<T>>, T*>
addressof(T& arg) noexcept
{
    return reinterpret_cast<T*>(
        &const_cast<char&>(
            reinterpret_cast<const volatile char&>(arg)
        )
    );
}

template <typename T>
T* addressof(const T&&) = delete;

} // namespace std

#endif