ceph/src/boost/libs/metaparse/test/swap.cpp

   1 // Copyright Abel Sinkovics (abel@sinkovics.hu) 2015.
   2 // Distributed under the Boost Software License, Version 1.0.
   3 //    (See accompanying file LICENSE_1_0.txt or copy at
   4 //          http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #include <boost/metaparse/v1/swap.hpp>
   7
   8 #include <boost/type_traits/is_same.hpp>
   9
  10 #include <boost/mpl/assert.hpp>
  11
  12 #include "test_case.hpp"
  13
  14 namespace
  15 {
  16   struct returns_first
  17   {
  18     typedef returns_first type;
  19
  20     template <class A, class>
  21     struct apply
  22     {
  23       typedef A type;
  24     };
  25   };
  26
  27   struct returns_second
  28   {
  29     typedef returns_second type;
  30
  31     template <class, class B>
  32     struct apply
  33     {
  34       typedef B type;
  35     };
  36   };
  37 }
  38
  39 BOOST_METAPARSE_TEST_CASE(swap)
  40 {
  41   using boost::metaparse::v1::swap;
  42   using boost::is_same;
  43
  44   BOOST_MPL_ASSERT((
  45     is_same<double, swap<returns_first>::apply<int, double>::type>
  46   ));
  47
  48   BOOST_MPL_ASSERT((
  49     is_same<int, swap<returns_second>::apply<int, double>::type>
  50   ));
  51 }
  52