boost/yap/config.hpp

0001 // Copyright (C) 2016-2018 T. Zachary Laine
0002 //
0003 // Distributed under the Boost Software License, Version 1.0. (See
0004 // accompanying file LICENSE_1_0.txt or copy at
0005 // http://www.boost.org/LICENSE_1_0.txt)
0006 #ifndef BOOST_YAP_CONFIG_HPP_INCLUDED
0007 #define BOOST_YAP_CONFIG_HPP_INCLUDED
0008
0009
0010 #ifndef BOOST_NO_CONSTEXPR_IF
0011 /** Indicates whether the compiler supports constexpr if.
0012
0013     If the user does not define any value for this, we assume that the
0014     compiler does not have the necessary support.  Note that this is a
0015     temporary hack; this should eventually be a Boost-wide macro. */
0016 #define BOOST_NO_CONSTEXPR_IF
0017 #elif BOOST_NO_CONSTEXPR_IF == 0
0018 #undef BOOST_NO_CONSTEXPR_IF
0019 #endif
0020
0021 #endif