mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
synced 2024-12-23 21:25:49 +00:00
37 lines
1,003 B
C++
37 lines
1,003 B
C++
/*=============================================================================
|
|
Copyright (c) 2011-2015 Bolero MURAKAMI
|
|
https://github.com/bolero-MURAKAMI/Sprout
|
|
|
|
Distributed under the Boost Software License, Version 1.0. (See accompanying
|
|
file LICENSE_1_0.txt or copy at http://www.sprout.org/LICENSE_1_0.txt)
|
|
=============================================================================*/
|
|
#ifndef SPROUT_UTILITY_USE_DEFAULT_HPP
|
|
#define SPROUT_UTILITY_USE_DEFAULT_HPP
|
|
|
|
#include <type_traits>
|
|
#include <sprout/config.hpp>
|
|
|
|
namespace sprout {
|
|
//
|
|
// use_default
|
|
//
|
|
struct use_default;
|
|
|
|
//
|
|
// is_use_default
|
|
//
|
|
template<typename T>
|
|
struct is_use_default
|
|
: public sprout::is_same<T, sprout::use_default>
|
|
{};
|
|
|
|
//
|
|
// select_default
|
|
//
|
|
template<typename T, typename Default>
|
|
struct select_default
|
|
: public std::conditional<sprout::is_use_default<T>::value, Default, T>
|
|
{};
|
|
} // namespace sprout
|
|
|
|
#endif // #ifndef SPROUT_UTILITY_USE_DEFAULT_HPP
|