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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/concept/struct.hpp> | |
7 | #include <boost/hana/equal.hpp> | |
8 | #include <boost/hana/find_if.hpp> | |
9 | #include <boost/hana/integral_constant.hpp> | |
10 | #include <boost/hana/optional.hpp> | |
11 | ||
12 | #include "minimal_struct.hpp" | |
13 | #include <laws/base.hpp> | |
14 | namespace hana = boost::hana; | |
15 | using hana::test::ct_eq; | |
16 | ||
17 | ||
18 | template <int i = 0> | |
19 | struct undefined { }; | |
20 | ||
21 | int main() { | |
22 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
23 | hana::find_if(obj(), undefined<>{}), | |
24 | hana::nothing | |
25 | )); | |
26 | ||
27 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
28 | hana::find_if(obj(ct_eq<0>{}), hana::equal.to(hana::int_c<0>)), | |
29 | hana::just(ct_eq<0>{}) | |
30 | )); | |
31 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
32 | hana::find_if(obj(undefined<1>{}), hana::equal.to(hana::int_c<1>)), | |
33 | hana::nothing | |
34 | )); | |
35 | ||
36 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
37 | hana::find_if(obj(ct_eq<0>{}, ct_eq<1>{}), hana::equal.to(hana::int_c<0>)), | |
38 | hana::just(ct_eq<0>{}) | |
39 | )); | |
40 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
41 | hana::find_if(obj(ct_eq<0>{}, ct_eq<1>{}), hana::equal.to(hana::int_c<1>)), | |
42 | hana::just(ct_eq<1>{}) | |
43 | )); | |
44 | BOOST_HANA_CONSTANT_CHECK(hana::equal( | |
45 | hana::find_if(obj(undefined<0>{}, undefined<1>{}), hana::equal.to(hana::int_c<2>)), | |
46 | hana::nothing | |
47 | )); | |
48 | } |