ceph/src/boost/libs/hana/test/map/is_subset.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/assert.hpp>
   6 #include <boost/hana/is_subset.hpp>
   7 #include <boost/hana/map.hpp>
   8 #include <boost/hana/not.hpp>
   9
  10 #include <laws/base.hpp>
  11 #include <support/minimal_product.hpp>
  12 namespace hana = boost::hana;
  13
  14
  15 template <int i>
  16 auto key() { return hana::test::ct_eq<i>{}; }
  17
  18 template <int i>
  19 auto val() { return hana::test::ct_eq<-i>{}; }
  20
  21 template <int i, int j>
  22 auto p() { return ::minimal_product(key<i>(), val<j>()); }
  23
  24 int main() {
  25     BOOST_HANA_CONSTANT_CHECK(hana::is_subset(
  26         hana::make_map(),
  27         hana::make_map()
  28     ));
  29     BOOST_HANA_CONSTANT_CHECK(hana::is_subset(
  30         hana::make_map(),
  31         hana::make_map(p<1, 1>())
  32     ));
  33     BOOST_HANA_CONSTANT_CHECK(hana::is_subset(
  34         hana::make_map(),
  35         hana::make_map(p<1, 1>(), p<2, 2>())
  36     ));
  37
  38     BOOST_HANA_CONSTANT_CHECK(hana::is_subset(
  39         hana::make_map(p<1, 1>()),
  40         hana::make_map(p<1, 1>(), p<2, 2>())
  41     ));
  42
  43     BOOST_HANA_CONSTANT_CHECK(hana::is_subset(
  44         hana::make_map(p<2, 2>(), p<1, 1>()),
  45         hana::make_map(p<1, 1>(), p<2, 2>())
  46     ));
  47     BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_subset(
  48         hana::make_map(p<3, 3>(), p<1, 1>()),
  49         hana::make_map(p<1, 1>(), p<2, 2>())
  50     )));
  51 }