53 lines
1.6 KiB
C++
53 lines
1.6 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/find_if.hpp>
|
|
#include <boost/hana/map.hpp>
|
|
#include <boost/hana/optional.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>()); }
|
|
|
|
int main() {
|
|
BOOST_HANA_CONSTANT_CHECK(hana::equal(
|
|
hana::find_if(hana::make_map(), hana::equal.to(key<1>())),
|
|
hana::nothing
|
|
));
|
|
|
|
BOOST_HANA_CONSTANT_CHECK(hana::equal(
|
|
hana::find_if(hana::make_map(p<1, 1>()), hana::equal.to(key<1>())),
|
|
hana::just(val<1>())
|
|
));
|
|
BOOST_HANA_CONSTANT_CHECK(hana::equal(
|
|
hana::find_if(hana::make_map(p<1, 1>()), hana::equal.to(key<2>())),
|
|
hana::nothing
|
|
));
|
|
|
|
BOOST_HANA_CONSTANT_CHECK(hana::equal(
|
|
hana::find_if(hana::make_map(p<1, 1>(), p<2, 2>()), hana::equal.to(key<1>())),
|
|
hana::just(val<1>())
|
|
));
|
|
BOOST_HANA_CONSTANT_CHECK(hana::equal(
|
|
hana::find_if(hana::make_map(p<1, 1>(), p<2, 2>()), hana::equal.to(key<2>())),
|
|
hana::just(val<2>())
|
|
));
|
|
BOOST_HANA_CONSTANT_CHECK(hana::equal(
|
|
hana::find_if(hana::make_map(p<1, 1>(), p<2, 2>()), hana::equal.to(key<3>())),
|
|
hana::nothing
|
|
));
|
|
}
|