hana/test/concept/struct/unpack.cpp
2017-01-07 14:14:18 -08:00

45 lines
1.3 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/concept/struct.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/integral_constant.hpp>
#include <boost/hana/unpack.hpp>
#include "minimal_struct.hpp"
#include <laws/base.hpp>
#include <support/minimal_product.hpp>
namespace hana = boost::hana;
using hana::test::ct_eq;
int main() {
constexpr auto pair = ::minimal_product;
hana::test::_injection<0> f{};
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::unpack(obj(), f),
f()
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::unpack(obj(ct_eq<0>{}), f),
f(pair(hana::int_c<0>, ct_eq<0>{}))
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::unpack(obj(ct_eq<0>{}, ct_eq<1>{}), f),
f(pair(hana::int_c<0>, ct_eq<0>{}),
pair(hana::int_c<1>, ct_eq<1>{}))
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::unpack(obj(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), f),
f(pair(hana::int_c<0>, ct_eq<0>{}),
pair(hana::int_c<1>, ct_eq<1>{}),
pair(hana::int_c<2>, ct_eq<2>{}))
));
}