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/erase_key.hpp>
8#include <boost/hana/set.hpp>
9
10#include <laws/base.hpp>
11namespace hana = boost::hana;
12using hana::test::ct_eq;
13
14
15struct undefined { };
16
17
18int main() {
19 BOOST_HANA_CONSTANT_CHECK(hana::equal(
20 hana::erase_key(hana::make_set(), undefined{}),
21 hana::make_set()
22 ));
23
24 BOOST_HANA_CONSTANT_CHECK(hana::equal(
25 hana::erase_key(hana::make_set(ct_eq<0>{}), ct_eq<0>{}),
26 hana::make_set()
27 ));
28 BOOST_HANA_CONSTANT_CHECK(hana::equal(
29 hana::erase_key(hana::make_set(ct_eq<0>{}), ct_eq<99>{}),
30 hana::make_set(ct_eq<0>{})
31 ));
32
33 BOOST_HANA_CONSTANT_CHECK(hana::equal(
34 hana::erase_key(hana::make_set(ct_eq<0>{}, ct_eq<1>{}), ct_eq<0>{}),
35 hana::make_set(ct_eq<1>{})
36 ));
37 BOOST_HANA_CONSTANT_CHECK(hana::equal(
38 hana::erase_key(hana::make_set(ct_eq<0>{}, ct_eq<1>{}), ct_eq<1>{}),
39 hana::make_set(ct_eq<0>{})
40 ));
41 BOOST_HANA_CONSTANT_CHECK(hana::equal(
42 hana::erase_key(hana::make_set(ct_eq<0>{}, ct_eq<1>{}), ct_eq<99>{}),
43 hana::make_set(ct_eq<0>{}, ct_eq<1>{})
44 ));
45
46 BOOST_HANA_CONSTANT_CHECK(hana::equal(
47 hana::erase_key(hana::make_set(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), ct_eq<0>{}),
48 hana::make_set(ct_eq<1>{}, ct_eq<2>{})
49 ));
50 BOOST_HANA_CONSTANT_CHECK(hana::equal(
51 hana::erase_key(hana::make_set(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), ct_eq<1>{}),
52 hana::make_set(ct_eq<0>{}, ct_eq<2>{})
53 ));
54 BOOST_HANA_CONSTANT_CHECK(hana::equal(
55 hana::erase_key(hana::make_set(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), ct_eq<2>{}),
56 hana::make_set(ct_eq<0>{}, ct_eq<1>{})
57 ));
58 BOOST_HANA_CONSTANT_CHECK(hana::equal(
59 hana::erase_key(hana::make_set(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), ct_eq<99>{}),
60 hana::make_set(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{})
61 ));
62}
63

source code of boost/libs/hana/test/set/erase_key.cpp