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

48 lines
1.5 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/ext/std/integer_sequence.hpp>
#include <boost/hana/ext/std/integral_constant.hpp>
#include <boost/hana/unpack.hpp>
#include <laws/base.hpp>
#include <type_traits>
#include <utility>
namespace hana = boost::hana;
int main() {
hana::test::_injection<0> f{};
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::unpack(std::integer_sequence<int>{}, f),
f()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::unpack(std::integer_sequence<int, 0>{}, f),
f(std::integral_constant<int, 0>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::unpack(std::integer_sequence<int, 0, 1>{}, f),
f(std::integral_constant<int, 0>{}, std::integral_constant<int, 1>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::unpack(std::integer_sequence<int, 0, 1, 2>{}, f),
f(std::integral_constant<int, 0>{}, std::integral_constant<int, 1>{},
std::integral_constant<int, 2>{})
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::unpack(std::integer_sequence<int, 0, 1, 2, 3>{}, f),
f(std::integral_constant<int, 0>{}, std::integral_constant<int, 1>{},
std::integral_constant<int, 2>{}, std::integral_constant<int, 3>{})
));
}