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- // 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/front.hpp>
- #include <boost/hana/greater.hpp>
- #include <boost/hana/integral_constant.hpp>
- #include <boost/hana/negate.hpp>
- #include <boost/hana/ordering.hpp>
- #include <boost/hana/sort.hpp>
- #include <boost/hana/tuple.hpp>
- #include <string>
- namespace hana = boost::hana;
- using namespace hana::literals;
- using namespace std::literals;
- // sort without a predicate
- BOOST_HANA_CONSTANT_CHECK(
- hana::sort(hana::make_tuple(1_c, -2_c, 3_c, 0_c)) ==
- hana::make_tuple(-2_c, 0_c, 1_c, 3_c)
- );
- // sort with a predicate
- BOOST_HANA_CONSTANT_CHECK(
- hana::sort(hana::make_tuple(1_c, -2_c, 3_c, 0_c), hana::greater) ==
- hana::make_tuple(3_c, 1_c, 0_c, -2_c)
- );
- int main() {
- // sort.by is syntactic sugar
- auto tuples = hana::make_tuple(
- hana::make_tuple(2_c, 'x', nullptr),
- hana::make_tuple(1_c, "foobar"s, hana::int_c<4>)
- );
- BOOST_HANA_RUNTIME_CHECK(
- hana::sort.by(hana::ordering(hana::front), tuples)
- == hana::make_tuple(
- hana::make_tuple(1_c, "foobar"s, hana::int_c<4>),
- hana::make_tuple(2_c, 'x', nullptr)
- )
- );
- }
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