libs/hana/example/cppcon_2014/functor.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/functional/placeholder.hpp>
   7 #include <boost/hana/integral_constant.hpp>
   8
   9 #include "matrix/comparable.hpp"
  10 #include "matrix/functor.hpp"
  11 namespace hana = boost::hana;
  12 using namespace cppcon;
  13
  14
  15 int main() {
  16     // transform
  17     {
  18         auto m = matrix(
  19             row(1,              hana::int_c<2>, 3),
  20             row(hana::int_c<4>, 5,              6),
  21             row(7,              8,              hana::int_c<9>)
  22         );
  23
  24         BOOST_HANA_CONSTEXPR_CHECK(hana::equal(
  25             hana::transform(m, hana::_ + hana::int_c<1>),
  26             matrix(
  27                 row(2,              hana::int_c<3>, 4),
  28                 row(hana::int_c<5>, 6,              7),
  29                 row(8,              9,              hana::int_c<10>)
  30             )
  31         ));
  32     }
  33 }