ceph/src/boost/libs/mp11/test/mp_with_index_cx.cpp

   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/config.hpp>
  10
  11 #if defined( BOOST_NO_CXX14_CONSTEXPR )
  12
  13 int main() {}
  14
  15 #else
  16
  17 #include <boost/mp11/algorithm.hpp>
  18 #include <boost/core/lightweight_test.hpp>
  19 #include <boost/config.hpp>
  20 #include <boost/detail/workaround.hpp>
  21
  22 using boost::mp11::mp_size_t;
  23 using boost::mp11::mp_with_index;
  24
  25 struct F
  26 {
  27     template<std::size_t I> constexpr std::size_t operator()( mp_size_t<I> ) const
  28     {
  29         return I;
  30     }
  31 };
  32
  33 #define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
  34
  35 int main()
  36 {
  37     constexpr std::size_t i = mp_with_index<64>( 57, F{} );
  38     STATIC_ASSERT( i == 57 );
  39 }
  40
  41 #endif