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// Copyright Louis Dionne 2013-2017
// Copyright Jason Rice 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)
#ifndef BOOST_HANA_TEST_AUTO_INDEX_IF_HPP
#define BOOST_HANA_TEST_AUTO_INDEX_IF_HPP
#include <boost/hana/assert.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/index_if.hpp>
#include <boost/hana/integral_constant.hpp>
#include <boost/hana/optional.hpp>
#include "test_case.hpp"
#include <laws/base.hpp>
#include <support/tracked.hpp>
namespace _test_index_if_detail { template <int> struct invalid { }; }
TestCase test_index_if{[]{
namespace hana = boost::hana;
using hana::test::ct_eq;
using _test_index_if_detail::invalid;
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::index_if(MAKE_TUPLE(), hana::equal.to(ct_eq<0>{})),
hana::nothing
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::index_if(MAKE_TUPLE(ct_eq<0>{}), hana::equal.to(ct_eq<0>{})),
hana::just(hana::size_c<0>)
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::index_if(MAKE_TUPLE(ct_eq<0>{}), hana::equal.to(ct_eq<42>{})),
hana::nothing
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::index_if(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::equal.to(ct_eq<0>{})),
hana::just(hana::size_c<0>)
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::index_if(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::equal.to(ct_eq<1>{})),
hana::just(hana::size_c<1>)
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::index_if(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::equal.to(ct_eq<2>{})),
hana::just(hana::size_c<2>)
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::index_if(MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), hana::equal.to(ct_eq<42>{})),
hana::nothing
));
#ifndef MAKE_TUPLE_NO_CONSTEXPR
auto type_equal = [](auto type) { return [=](auto&& value) {
return hana::equal(hana::typeid_(value), type);
};};
static_assert(decltype(hana::equal(
hana::index_if(MAKE_TUPLE(1, '2', 3.3), type_equal(hana::type_c<int>)),
hana::just(hana::size_c<0>)
)){}, "");
static_assert(decltype(hana::equal(
hana::index_if(MAKE_TUPLE(1, '2', 3.3), type_equal(hana::type_c<char>)),
hana::just(hana::size_c<1>)
)){}, "");
static_assert(decltype(hana::equal(
hana::index_if(MAKE_TUPLE(1, '2', 3.3), type_equal(hana::type_c<double>)),
hana::just(hana::size_c<2>)
)){}, "");
static_assert(decltype(hana::equal(
hana::index_if(MAKE_TUPLE(1, '2', 3.3), type_equal(hana::type_c<invalid<42>>)),
hana::nothing
)){}, "");
#endif
}};
#endif // !BOOST_HANA_TEST_AUTO_INDEX_IF_HPP
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