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Editing: 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
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