ceph/src/boost/libs/hana/example/tuple/interop.cpp

   1 // Copyright Louis Dionne 2013-2017
   2 // Distributed under the Boost Software License, Version 1.0.
   3 // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
   4
   5 #include <boost/hana/assert.hpp>
   6 #include <boost/hana/core/to.hpp>
   7 #include <boost/hana/equal.hpp>
   8 #include <boost/hana/ext/std/array.hpp>
   9 #include <boost/hana/ext/std/tuple.hpp>
  10 #include <boost/hana/integral_constant.hpp>
  11 #include <boost/hana/range.hpp>
  12 #include <boost/hana/tuple.hpp>
  13
  14 #include <array>
  15 #include <tuple>
  16 namespace hana = boost::hana;
  17
  18
  19 int main() {
  20     static_assert(
  21         hana::to_tuple(std::make_tuple(1, '2', 3.3)) == hana::make_tuple(1, '2', 3.3)
  22     , "");
  23
  24     BOOST_HANA_CONSTANT_CHECK(
  25         hana::to_tuple(hana::make_range(hana::int_c<1>, hana::int_c<4>))
  26             ==
  27         hana::make_tuple(hana::int_c<1>, hana::int_c<2>, hana::int_c<3>)
  28     );
  29
  30     // std::array's operator[] is not constexpr, so we can't use static_assert
  31     BOOST_HANA_CONSTEXPR_CHECK(
  32         hana::to_tuple(std::array<int, 3>{{1, 2, 3}}) == hana::make_tuple(1, 2, 3)
  33     );
  34 }