ceph/src/boost/libs/hana/test/concept/struct/unpack.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/concept/struct.hpp>
   7 #include <boost/hana/equal.hpp>
   8 #include <boost/hana/integral_constant.hpp>
   9 #include <boost/hana/unpack.hpp>
  10
  11 #include "minimal_struct.hpp"
  12 #include <laws/base.hpp>
  13 #include <support/minimal_product.hpp>
  14 namespace hana = boost::hana;
  15 using hana::test::ct_eq;
  16
  17
  18 int main() {
  19     constexpr auto pair = ::minimal_product;
  20     hana::test::_injection<0> f{};
  21
  22     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  23         hana::unpack(obj(), f),
  24         f()
  25     ));
  26
  27     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  28         hana::unpack(obj(ct_eq<0>{}), f),
  29         f(pair(hana::int_c<0>, ct_eq<0>{}))
  30     ));
  31
  32     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  33         hana::unpack(obj(ct_eq<0>{}, ct_eq<1>{}), f),
  34         f(pair(hana::int_c<0>, ct_eq<0>{}),
  35           pair(hana::int_c<1>, ct_eq<1>{}))
  36     ));
  37
  38     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  39         hana::unpack(obj(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), f),
  40         f(pair(hana::int_c<0>, ct_eq<0>{}),
  41           pair(hana::int_c<1>, ct_eq<1>{}),
  42           pair(hana::int_c<2>, ct_eq<2>{}))
  43     ));
  44 }