// 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/core/make.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/integral_constant.hpp>
#include <boost/hana/range.hpp>
#include <boost/hana/sum.hpp>
namespace hana = boost::hana;


int main() {
    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<-3>, hana::int_c<-3>)),
        hana::int_c<0>
    ));
    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<-3>, hana::int_c<-2>)),
        hana::int_c<-3>
    ));
    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<-3>, hana::int_c<-1>)),
        hana::int_c<-3 + -2>
    ));
    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<-3>, hana::int_c<0>)),
        hana::int_c<-3 + -2 + -1>
    ));
    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<-3>, hana::int_c<1>)),
        hana::int_c<-3 + -2 + -1 + 0>
    ));
    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<-3>, hana::int_c<2>)),
        hana::int_c<-3 + -2 + -1 + 0 + 1>
    ));
    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<-3>, hana::int_c<3>)),
        hana::int_c<-3 + -2 + -1 + 0 + 1 + 2>
    ));

    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<0>, hana::int_c<0>)),
        hana::int_c<0>
    ));
    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<0>, hana::int_c<1>)),
        hana::int_c<0>
    ));
    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<0>, hana::int_c<2>)),
        hana::int_c<0 + 1>
    ));
    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<0>, hana::int_c<3>)),
        hana::int_c<0 + 1 + 2>
    ));
    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<0>, hana::int_c<4>)),
        hana::int_c<0 + 1 + 2 + 3>
    ));

    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<3>, hana::int_c<3>)),
        hana::int_c<0>
    ));
    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<3>, hana::int_c<4>)),
        hana::int_c<3>
    ));
    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<3>, hana::int_c<5>)),
        hana::int_c<3 + 4>
    ));
    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<3>, hana::int_c<6>)),
        hana::int_c<3 + 4 + 5>
    ));
    BOOST_HANA_CONSTANT_CHECK(hana::equal(
        hana::sum<>(hana::make_range(hana::int_c<3>, hana::int_c<7>)),
        hana::int_c<3 + 4 + 5 + 6>
    ));
}