41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
// Copyright Louis Dionne 2013-2017
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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#include <boost/hana/comparing.hpp>
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#include <boost/hana/equal.hpp>
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#include <boost/hana/group.hpp>
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#include <boost/hana/length.hpp>
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#include <boost/hana/range.hpp>
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#include <boost/hana/tuple.hpp>
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namespace hana = boost::hana;
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int main() {
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constexpr auto sequences = hana::make_tuple(
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hana::make_tuple(1, 2, 3),
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hana::make_tuple('x', 'y', 'z'),
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hana::range_c<long, 0, 1>,
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hana::tuple_t<char, int>,
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hana::range_c<int, 0, 2>,
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hana::make_tuple(123.4, nullptr)
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);
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constexpr auto grouped = hana::group.by(hana::comparing(hana::length), sequences);
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static_assert(grouped == hana::make_tuple(
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hana::make_tuple(
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hana::make_tuple(1, 2, 3),
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hana::make_tuple('x', 'y', 'z')
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),
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hana::make_tuple(
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hana::range_c<long, 0, 1>
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),
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hana::make_tuple(
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hana::tuple_t<char, int>,
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hana::range_c<int, 0, 2>,
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hana::make_tuple(123.4, nullptr)
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)
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), "");
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}
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