ceph/src/boost/libs/hana/test/ext/boost/tuple/monad_plus.cpp

   1 // Copyright Louis Dionne 2013-2016
   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/ext/boost/tuple.hpp>
   6
   7 #include <boost/hana/bool.hpp>
   8 #include <boost/hana/equal.hpp>
   9 #include <boost/hana/functional/always.hpp>
  10 #include <boost/hana/tuple.hpp>
  11
  12 #include <laws/base.hpp>
  13 #include <laws/monad_plus.hpp>
  14
  15 #include <boost/tuple/tuple.hpp>
  16 namespace hana = boost::hana;
  17
  18
  19 template <int i>
  20 using eq = hana::test::ct_eq<i>;
  21
  22 int main() {
  23     //////////////////////////////////////////////////////////////////////////
  24     // Setup for the laws below
  25     //////////////////////////////////////////////////////////////////////////
  26     auto eq_tuples = hana::make_tuple(
  27           ::boost::make_tuple(eq<0>{})
  28         , ::boost::make_tuple(eq<0>{}, eq<1>{})
  29         , ::boost::make_tuple(eq<0>{}, eq<1>{}, eq<2>{})
  30     );
  31
  32     auto eq_values = hana::make_tuple(eq<0>{}, eq<1>{}, eq<2>{});
  33     auto predicates = hana::make_tuple(
  34         hana::equal.to(eq<0>{}), hana::equal.to(eq<1>{}), hana::equal.to(eq<2>{}),
  35         hana::always(hana::false_c), hana::always(hana::true_c)
  36     );
  37
  38     //////////////////////////////////////////////////////////////////////////
  39     // MonadPlus
  40     //////////////////////////////////////////////////////////////////////////
  41     hana::test::TestMonadPlus<hana::ext::boost::tuple_tag>{eq_tuples, predicates, eq_values};
  42 }