ceph/src/boost/libs/hana/example/functional/demux.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/equal.hpp>
   6 #include <boost/hana/functional/demux.hpp>
   7 #include <boost/hana/functional/placeholder.hpp>
   8 #include <boost/hana/tuple.hpp>
   9 namespace hana = boost::hana;
  10 using hana::_;
  11
  12
  13 constexpr auto f = hana::demux(hana::make_tuple)(
  14     _ + _,
  15     _ - _,
  16     _ * _,
  17     _ / _
  18 );
  19
  20 static_assert(
  21     f(10, 4) == hana::make_tuple(
  22         10 + 4,
  23         10 - 4,
  24         10 * 4,
  25         10 / 4
  26     )
  27 , "");
  28
  29
  30 int main() { }