1 2 // Copyright 2017 Peter Dimov. 3 // 4 // Distributed under the Boost Software License, Version 1.0. 5 // 6 // See accompanying file LICENSE_1_0.txt or copy at 7 // http://www.boost.org/LICENSE_1_0.txt 8 9 #include <boost/mp11/detail/config.hpp> 10 11 #if !defined( BOOST_MP11_HAS_CXX14_CONSTEXPR ) 12 main()13int main() {} 14 15 #else 16 17 #include <boost/mp11/algorithm.hpp> 18 #include <boost/core/lightweight_test.hpp> 19 20 using boost::mp11::mp_size_t; 21 using boost::mp11::mp_with_index; 22 23 struct F 24 { operator ()F25 template<std::size_t I> constexpr std::size_t operator()( mp_size_t<I> ) const 26 { 27 return I; 28 } 29 }; 30 31 #define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__) 32 main()33int main() 34 { 35 constexpr std::size_t i = mp_with_index<64>( 57, F{} ); 36 STATIC_ASSERT( i == 57 ); 37 } 38 39 #endif 40