| 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/comparing.hpp> |
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| 7 | #include <boost/hana/equal.hpp> |
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| 8 | #include <boost/hana/tuple.hpp> |
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| 9 | #include <boost/hana/type.hpp> |
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| 10 | #include <boost/hana/unique.hpp> |
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| 11 | |
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| 12 | #include <string> |
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| 13 | namespace hana = boost::hana; |
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| 14 | using namespace std::literals; |
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| 15 | |
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| 16 | |
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| 17 | // unique without a predicate |
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| 18 | constexpr auto types = hana::tuple_t<int, float, float, char, int, int, int, double>; |
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| 19 | BOOST_HANA_CONSTANT_CHECK( |
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| 20 | hana::unique(types) == hana::tuple_t<int, float, char, int, double> |
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| 21 | ); |
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| 22 | |
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| 23 | int main() { |
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| 24 | // unique with a predicate |
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| 25 | auto objects = hana::make_tuple(1, 2, "abc"s , 'd', "efg"s , "hij"s , 3.4f); |
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| 26 | BOOST_HANA_RUNTIME_CHECK( |
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| 27 | hana::unique(objects, [](auto const& t, auto const& u) { |
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| 28 | return hana::typeid_(t) == hana::typeid_(u); |
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| 29 | }) |
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| 30 | == hana::make_tuple(1, "abc"s , 'd', "efg"s , 3.4f) |
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| 31 | ); |
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| 32 | |
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| 33 | // unique.by is syntactic sugar |
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| 34 | BOOST_HANA_RUNTIME_CHECK( |
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| 35 | hana::unique.by(hana::comparing(hana::typeid_), objects) == |
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| 36 | hana::make_tuple(1, "abc"s , 'd', "efg"s , 3.4f) |
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| 37 | ); |
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| 38 | } |
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| 39 | |
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