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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/comparing.hpp>
- #include <boost/hana/equal.hpp>
- #include <boost/hana/group.hpp>
- #include <boost/hana/integral_constant.hpp>
- #include <boost/hana/length.hpp>
- #include <boost/hana/range.hpp>
- #include <boost/hana/tuple.hpp>
- #include <boost/hana/type.hpp>
- namespace hana = boost::hana;
- // group without a predicate
- BOOST_HANA_CONSTANT_CHECK(
- hana::group(hana::make_tuple(hana::int_c<1>, hana::long_c<1>, hana::type_c<int>, hana::char_c<'x'>, hana::char_c<'x'>))
- == hana::make_tuple(
- hana::make_tuple(hana::int_c<1>, hana::long_c<1>),
- hana::make_tuple(hana::type_c<int>),
- hana::make_tuple(hana::char_c<'x'>, hana::char_c<'x'>)
- )
- );
- // group with a predicate
- constexpr auto tuples = hana::make_tuple(
- hana::range_c<int, 0, 1>,
- hana::range_c<int, 0, 2>,
- hana::range_c<int, 1, 3>,
- hana::range_c<int, 2, 6>
- );
- BOOST_HANA_CONSTANT_CHECK(
- hana::group(tuples, hana::comparing(hana::length))
- == hana::make_tuple(
- hana::make_tuple(
- hana::range_c<int, 0, 1>
- ),
- hana::make_tuple(
- hana::range_c<int, 0, 2>,
- hana::range_c<int, 1, 3>
- ),
- hana::make_tuple(
- hana::range_c<int, 2, 6>
- )
- )
- );
- // group.by is syntactic sugar
- static_assert(
- hana::group.by(hana::comparing(hana::typeid_),
- hana::make_tuple(1, 2, 3, 'x', 'y', 4.4, 5.5))
- == hana::make_tuple(
- hana::make_tuple(1, 2, 3),
- hana::make_tuple('x', 'y'),
- hana::make_tuple(4.4, 5.5)
- )
- , "");
- int main() { }
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