hana/test/basic_tuple/foldable.cpp

// Copyright Louis Dionne 2013-2016
// 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/basic_tuple.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/unpack.hpp>

#include <laws/base.hpp>
namespace hana = boost::hana;


int main() {
    using hana::test::ct_eq;

    // unpack
    {
        hana::test::_injection<0> f{};
        BOOST_HANA_CONSTANT_CHECK(hana::equal(
            hana::unpack(hana::make_basic_tuple(), f),
            f()
        ));
        BOOST_HANA_CONSTANT_CHECK(hana::equal(
            hana::unpack(hana::make_basic_tuple(ct_eq<0>{}), f),
            f(ct_eq<0>{})
        ));
        BOOST_HANA_CONSTANT_CHECK(hana::equal(
            hana::unpack(hana::make_basic_tuple(ct_eq<0>{}, ct_eq<1>{}), f),
            f(ct_eq<0>{}, ct_eq<1>{})
        ));
        BOOST_HANA_CONSTANT_CHECK(hana::equal(
            hana::unpack(hana::make_basic_tuple(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), f),
            f(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{})
        ));
    }
}