boost/multi_index/detail/define_if_constexpr_macro.hpp
/* Copyright 2003-2020 Joaquin M Lopez Munoz. * 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) * * See http://www.boost.org/libs/multi_index for library home page. */ #include <boost/config.hpp> #if !defined(BOOST_MULTI_INDEX_DETAIL_UNDEF_IF_CONSTEXPR_MACRO) #if !defined(BOOST_NO_CXX17_IF_CONSTEXPR) #define BOOST_MULTI_INDEX_IF_CONSTEXPR if constexpr #else #define BOOST_MULTI_INDEX_IF_CONSTEXPR if #if defined(BOOST_MSVC) #define BOOST_MULTI_INDEX_DETAIL_C4127_DISABLED #pragma warning(push) #pragma warning(disable:4127) /* conditional expression is constant */ #endif #endif #else #undef BOOST_MULTI_INDEX_IF_CONSTEXPR #if defined(BOOST_MULTI_INDEX_DETAIL_C4127_DISABLED) #pragma warning(pop) #undef BOOST_MULTI_INDEX_DETAIL_C4127_DISABLED #endif #endif