hana/example/map/union.cpp
2018-06-04 11:33:03 -07:00

54 lines
2.0 KiB
C++

// Copyright Louis Dionne 2013-2017
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
#include <boost/hana/assert.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/integral_constant.hpp>
#include <boost/hana/string.hpp>
#include <boost/hana/map.hpp>
#include <boost/hana/type.hpp>
#include <boost/hana/union.hpp>
#include <string>
namespace hana = boost::hana;
using namespace hana::literals;
static auto m1 = hana::make_map(
hana::make_pair(BOOST_HANA_STRING("key1"), hana::type_c<std::string>),
hana::make_pair(BOOST_HANA_STRING("key2"), hana::type_c<std::string>)
);
static auto m2 = hana::make_map(
hana::make_pair(BOOST_HANA_STRING("key3"), hana::type_c<std::string>),
hana::make_pair(BOOST_HANA_STRING("key4"), hana::type_c<std::string>),
hana::make_pair(BOOST_HANA_STRING("key5"), hana::type_c<std::string>)
);
BOOST_HANA_CONSTANT_CHECK(hana::union_(m1, m2) == hana::make_map(
hana::make_pair(BOOST_HANA_STRING("key1"), hana::type_c<std::string>),
hana::make_pair(BOOST_HANA_STRING("key2"), hana::type_c<std::string>),
hana::make_pair(BOOST_HANA_STRING("key3"), hana::type_c<std::string>),
hana::make_pair(BOOST_HANA_STRING("key4"), hana::type_c<std::string>),
hana::make_pair(BOOST_HANA_STRING("key5"), hana::type_c<std::string>)
));
constexpr auto m3 = hana::make_map(
hana::make_pair(hana::type_c<int>, hana::int_c<1>),
hana::make_pair(hana::type_c<bool>, hana::bool_c<true>)
);
constexpr auto m4 = hana::make_map(
hana::make_pair(hana::type_c<char>, hana::char_c<'c'>),
hana::make_pair(hana::type_c<bool>, hana::bool_c<false>)
);
BOOST_HANA_CONSTANT_CHECK(hana::union_(m3, m4) == hana::make_map(
hana::make_pair(hana::type_c<int>, hana::int_c<1>),
hana::make_pair(hana::type_c<bool>, hana::bool_c<false>),
hana::make_pair(hana::type_c<char>, hana::char_c<'c'>)
));
int main() { }