hana/test/ext/std/integer_sequence/front.cpp
2017-01-07 14:14:18 -08:00

32 lines
930 B
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/ext/std/integer_sequence.hpp>
#include <boost/hana/ext/std/integral_constant.hpp>
#include <boost/hana/front.hpp>
#include <type_traits>
#include <utility>
namespace hana = boost::hana;
int main() {
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::front(std::index_sequence<0>{}),
std::integral_constant<std::size_t, 0>{}
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::front(std::index_sequence<0, 1>{}),
std::integral_constant<std::size_t, 0>{}
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::front(std::integer_sequence<int, -3, 1, 2, 3, 4>{}),
std::integral_constant<int, -3>{}
));
}