boost/type_traits/enable_if.hpp
/*
Copyright 2003 The Trustees of Indiana University
Authors: Jaakko Jarvi (jajarvi at osl.iu.edu)
Jeremiah Willcock (jewillco at osl.iu.edu)
Andrew Lumsdaine (lums at osl.iu.edu)
Copyright 2018 Glen Joseph Fernandes
(glenjofe@gmail.com)
Distributed under the Boost Software License,
Version 1.0. (See accompanying file LICENSE_1_0.txt
or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
#ifndef BOOST_TT_ENABLE_IF_HPP_INCLUDED
#define BOOST_TT_ENABLE_IF_HPP_INCLUDED
#include <boost/config.hpp>
namespace boost {
template<bool B, class T = void>
struct enable_if_ {
typedef T type;
};
template<class T>
struct enable_if_<false, T> { };
#if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
template<bool B, class T = void>
using enable_if_t = typename enable_if_<B, T>::type;
#endif
} /* boost */
#endif
