| 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/at_key.hpp> |
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| 7 | #include <boost/hana/equal.hpp> |
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| 8 | #include <boost/hana/find.hpp> |
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| 9 | #include <boost/hana/integral_constant.hpp> |
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| 10 | #include <boost/hana/map.hpp> |
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| 11 | #include <boost/hana/optional.hpp> |
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| 12 | #include <boost/hana/pair.hpp> |
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| 13 | #include <boost/hana/type.hpp> |
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| 14 | namespace hana = boost::hana; |
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| 15 | |
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| 16 | |
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| 17 | constexpr auto m = hana::make_map( |
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| 18 | hana::make_pair(hana::type_c<int>, 'i'), |
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| 19 | hana::make_pair(hana::type_c<float>, 'f') |
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| 20 | ); |
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| 21 | static_assert(hana::find(m, hana::type_c<int>) == hana::just('i'), "" ); |
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| 22 | static_assert(hana::find(m, hana::type_c<float>) == hana::just('f'), "" ); |
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| 23 | BOOST_HANA_CONSTANT_CHECK(hana::find(m, hana::type_c<void>) == hana::nothing); |
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| 24 | BOOST_HANA_CONSTANT_CHECK(hana::find(m, hana::int_c<3>) == hana::nothing); |
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| 25 | |
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| 26 | // operator[] is equivalent to at_key |
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| 27 | static_assert(m[hana::type_c<int>] == 'i', "" ); |
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| 28 | static_assert(m[hana::type_c<float>] == 'f', "" ); |
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| 29 | |
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| 30 | int main() { } |
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| 31 | |
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