ceph/src/boost/libs/hana/test/ext/boost/tuple/monad.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/tuple.hpp>
   8
   9 #include <laws/applicative.hpp>
  10 #include <laws/base.hpp>
  11 #include <laws/functor.hpp>
  12 #include <laws/monad.hpp>
  13
  14 #include <boost/tuple/tuple.hpp>
  15 namespace hana = boost::hana;
  16
  17
  18 template <int i>
  19 using eq = hana::test::ct_eq<i>;
  20
  21 int main() {
  22     //////////////////////////////////////////////////////////////////////////
  23     // Setup for the laws below
  24     //////////////////////////////////////////////////////////////////////////
  25     auto eq_tuples = hana::make_tuple(
  26           ::boost::make_tuple()
  27         , ::boost::make_tuple(eq<0>{})
  28         , ::boost::make_tuple(eq<0>{}, eq<1>{})
  29     );
  30
  31     auto eq_values = hana::make_tuple(eq<0>{}, eq<2>{});
  32
  33     auto eq_tuples_tuples = hana::make_tuple(
  34           ::boost::make_tuple()
  35         , ::boost::make_tuple(
  36             ::boost::make_tuple(eq<0>{}))
  37         , ::boost::make_tuple(
  38             ::boost::make_tuple(eq<0>{}),
  39             ::boost::make_tuple(eq<1>{}, eq<2>{}))
  40         , ::boost::make_tuple(
  41             ::boost::make_tuple(eq<0>{}),
  42             ::boost::make_tuple(eq<1>{}, eq<2>{}),
  43             ::boost::make_tuple(eq<3>{}, eq<4>{}))
  44     );
  45
  46     //////////////////////////////////////////////////////////////////////////
  47     // Functor up to Monad
  48     //////////////////////////////////////////////////////////////////////////
  49     hana::test::TestFunctor<hana::ext::boost::tuple_tag>{eq_tuples, eq_values};
  50     hana::test::TestApplicative<hana::ext::boost::tuple_tag>{eq_tuples};
  51     hana::test::TestMonad<hana::ext::boost::tuple_tag>{eq_tuples, eq_tuples_tuples};
  52 }