| 1 | // Copyright Louis Dionne 2013-2022 |
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| 2 | // Distributed under the Boost Software License, Version 1.0. |
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| 3 | // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) |
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| 4 | |
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| 5 | #include <boost/hana/assert.hpp> |
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| 6 | #include <boost/hana/equal.hpp> |
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| 7 | #include <boost/hana/front.hpp> |
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| 8 | #include <boost/hana/greater.hpp> |
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| 9 | #include <boost/hana/integral_constant.hpp> |
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| 10 | #include <boost/hana/negate.hpp> |
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| 11 | #include <boost/hana/ordering.hpp> |
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| 12 | #include <boost/hana/sort.hpp> |
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| 13 | #include <boost/hana/tuple.hpp> |
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| 14 | |
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| 15 | #include <string> |
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| 16 | namespace hana = boost::hana; |
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| 17 | using namespace hana::literals; |
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| 18 | using namespace std::literals; |
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| 19 | |
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| 20 | |
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| 21 | // sort without a predicate |
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| 22 | BOOST_HANA_CONSTANT_CHECK( |
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| 23 | hana::sort(hana::make_tuple(1_c, -2_c, 3_c, 0_c)) == |
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| 24 | hana::make_tuple(-2_c, 0_c, 1_c, 3_c) |
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| 25 | ); |
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| 26 | |
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| 27 | // sort with a predicate |
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| 28 | BOOST_HANA_CONSTANT_CHECK( |
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| 29 | hana::sort(hana::make_tuple(1_c, -2_c, 3_c, 0_c), hana::greater) == |
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| 30 | hana::make_tuple(3_c, 1_c, 0_c, -2_c) |
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| 31 | ); |
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| 32 | |
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| 33 | int main() { |
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| 34 | // sort.by is syntactic sugar |
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| 35 | auto tuples = hana::make_tuple( |
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| 36 | hana::make_tuple(2_c, 'x', nullptr), |
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| 37 | hana::make_tuple(1_c, "foobar"s , hana::int_c<4>) |
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| 38 | ); |
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| 39 | |
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| 40 | BOOST_HANA_RUNTIME_CHECK( |
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| 41 | hana::sort.by(hana::ordering(hana::front), tuples) |
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| 42 | == hana::make_tuple( |
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| 43 | hana::make_tuple(1_c, "foobar"s , hana::int_c<4>), |
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| 44 | hana::make_tuple(2_c, 'x', nullptr) |
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| 45 | ) |
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| 46 | ); |
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| 47 | } |
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| 48 | |
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