extension.hpp

 
#ifndef M5_UTILITY_STL_EXTENSION_HPP
#define M5_UTILITY_STL_EXTENSION_HPP
 
#include <cstddef>
#include <type_traits>
 
namespace m5 {
namespace stl {
 
template <class C>
constexpr auto size(const C& c) -> decltype(c.size())
{
    return c.size();
}
 
template <typename T, size_t N>
constexpr auto size(const T (&)[N]) noexcept -> size_t
{
    return N;
}
 
template <typename E>
constexpr inline typename std::underlying_type<E>::type to_underlying(const E e) noexcept
{
    return static_cast<typename std::underlying_type<E>::type>(e);
}
 
}  // namespace stl
}  // namespace m5
 
#endif