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b32b8144 | 1 | // Copyright Louis Dionne 2013-2017 |
7c673cae FG |
2 | // Distributed under the Boost Software License, Version 1.0. |
3 | // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) | |
4 | ||
5 | #include <boost/hana/assert.hpp> | |
6 | #include <boost/hana/equal.hpp> | |
7 | #include <boost/hana/find_if.hpp> | |
8 | #include <boost/hana/map.hpp> | |
9 | #include <boost/hana/optional.hpp> | |
10 | ||
11 | #include <laws/base.hpp> | |
12 | #include <support/minimal_product.hpp> | |
13 | namespace hana = boost::hana; | |
14 | ||
15 | ||
16 | template <int i> | |
17 | auto key() { return hana::test::ct_eq<i>{}; } | |
18 | ||
19 | template <int i> | |
20 | auto val() { return hana::test::ct_eq<-i>{}; } | |
21 | ||
22 | template <int i, int j> | |
23 | auto p() { return ::minimal_product(key<i>(), val<j>()); } | |
24 | ||
25 | int main() { | |
26 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
27 | hana::find_if(hana::make_map(), hana::equal.to(key<1>())), | |
28 | hana::nothing | |
29 | )); | |
30 | ||
31 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
32 | hana::find_if(hana::make_map(p<1, 1>()), hana::equal.to(key<1>())), | |
33 | hana::just(val<1>()) | |
34 | )); | |
35 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
36 | hana::find_if(hana::make_map(p<1, 1>()), hana::equal.to(key<2>())), | |
37 | hana::nothing | |
38 | )); | |
39 | ||
40 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
41 | hana::find_if(hana::make_map(p<1, 1>(), p<2, 2>()), hana::equal.to(key<1>())), | |
42 | hana::just(val<1>()) | |
43 | )); | |
44 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
45 | hana::find_if(hana::make_map(p<1, 1>(), p<2, 2>()), hana::equal.to(key<2>())), | |
46 | hana::just(val<2>()) | |
47 | )); | |
48 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
49 | hana::find_if(hana::make_map(p<1, 1>(), p<2, 2>()), hana::equal.to(key<3>())), | |
50 | hana::nothing | |
51 | )); | |
52 | } |