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// 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/erase_key.hpp>
#include <boost/hana/map.hpp>
#include <laws/base.hpp>
#include <support/minimal_product.hpp>
namespace hana = boost::hana;
template <int i>
auto key() { return hana::test::ct_eq<i>{}; }
template <int i>
auto val() { return hana::test::ct_eq<-i>{}; }
template <int i, int j>
auto p() { return ::minimal_product(key<i>(), val<j>()); }
struct undefined { };
int main() {
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::erase_key(hana::make_map(), undefined{}),
hana::make_map()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::erase_key(hana::make_map(p<1, 1>()), key<1>()),
hana::make_map()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::erase_key(hana::make_map(p<1, 1>()), key<99>()),
hana::make_map(p<1, 1>())
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::erase_key(hana::make_map(p<1, 1>(), p<2, 2>()), key<99>()),
hana::make_map(p<1, 1>(), p<2, 2>())
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::erase_key(hana::make_map(p<1, 1>(), p<2, 2>()), key<1>()),
hana::make_map(p<2, 2>())
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::erase_key(hana::make_map(p<1, 1>(), p<2, 2>()), key<2>()),
hana::make_map(p<1, 1>())
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::erase_key(hana::make_map(p<1, 1>(), p<2, 2>(), p<3, 3>()), key<99>()),
hana::make_map(p<1, 1>(), p<2, 2>(), p<3, 3>())
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::erase_key(hana::make_map(p<1, 1>(), p<2, 2>(), p<3, 3>()), key<1>()),
hana::make_map(p<2, 2>(), p<3, 3>())
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::erase_key(hana::make_map(p<1, 1>(), p<2, 2>(), p<3, 3>()), key<2>()),
hana::make_map(p<1, 1>(), p<3, 3>())
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::erase_key(hana::make_map(p<1, 1>(), p<2, 2>(), p<3, 3>()), key<3>()),
hana::make_map(p<1, 1>(), p<2, 2>())
));
}
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