1// Copyright Louis Dionne 2013-2022
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/map.hpp>
8#include <boost/hana/symmetric_difference.hpp>
9
10#include <laws/base.hpp>
11#include <support/minimal_product.hpp>
12namespace hana = boost::hana;
13using hana::test::ct_eq;
14
15
16template <int i>
17auto key() { return hana::test::ct_eq<i>{}; }
18
19template <int i>
20auto val() { return hana::test::ct_eq<-i>{}; }
21
22template <int i, int j>
23auto p() { return ::minimal_product(key<i>(), val<j>()); }
24
25int main() {
26 BOOST_HANA_CONSTANT_CHECK(hana::equal(
27 hana::symmetric_difference(
28 hana::make_map(),
29 hana::make_map()
30 ),
31 hana::make_map()
32 ));
33
34 BOOST_HANA_CONSTANT_CHECK(hana::equal(
35 hana::symmetric_difference(
36 hana::make_map(p<1, 1>()),
37 hana::make_map(p<1, 1>())
38 ),
39 hana::make_map()
40 ));
41
42 BOOST_HANA_CONSTANT_CHECK(hana::equal(
43 hana::symmetric_difference(
44 hana::make_map(p<1, 2>()),
45 hana::make_map(p<2, 4>())
46 ),
47 hana::make_map(p<1, 2>(),
48 p<2, 4>())
49 ));
50
51 BOOST_HANA_CONSTANT_CHECK(hana::equal(
52 hana::symmetric_difference(
53 hana::make_map(p<1, 2>(),
54 p<2, 22>()),
55 hana::make_map(p<2, 4>(),
56 p<3, 33>())
57 ),
58 hana::make_map(p<1, 2>(),
59 p<3, 33>())
60 ));
61
62 BOOST_HANA_CONSTANT_CHECK(hana::equal(
63 hana::symmetric_difference(
64 hana::make_map(p<1, 2>(),
65 p<2, 22>(),
66 p<3, 33>(),
67 p<5, 55>(),
68 p<8, 88>()),
69 hana::make_map(p<2, 4>(),
70 p<3, 33>(),
71 p<4, 44>(),
72 p<9, 99>())
73 ),
74 hana::make_map(p<1, 2>(),
75 p<5, 55>(),
76 p<8, 88>(),
77 p<4, 44>(),
78 p<9, 99>())
79 ));
80}
81

source code of boost/libs/hana/test/map/symmetric_difference.cpp