//! Shims for std:: functions that aren't available in the current C++ versions
//! we target.

#ifndef STDSHIMS_H
#define STDSHIMS_H

#include <type_traits>
#include <utility>

#if (__cplusplus >= 201703L || _MSC_VER >= 1914)
#ifndef _MSC_VER
#warning "This part of this file should now be removed! The functions it provides are part of the C++17 standard."
#endif
using std::as_const;

#else

/// Shim for http://en.cppreference.com/w/cpp/utility/as_const
template <typename T>
constexpr typename std::add_const<T>::type& as_const(T& t) noexcept
{
    return t;
}

template <typename T>
void as_const(const T&&) = delete;
#endif

#endif // include guard