1 // Copyright Louis Dionne 2013-2017
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 #ifndef BOOST_HANA_TEST_AUTO_NONE_OF_HPP
6 #define BOOST_HANA_TEST_AUTO_NONE_OF_HPP
7
8 #include <boost/hana/assert.hpp>
9 #include <boost/hana/bool.hpp>
10 #include <boost/hana/equal.hpp>
11 #include <boost/hana/none_of.hpp>
12 #include <boost/hana/not.hpp>
13
14 #include "test_case.hpp"
15 #include <laws/base.hpp>
16
17
__anone8e107fc0102null18 TestCase test_none_of{[]{
19 namespace hana = boost::hana;
20 using hana::test::ct_eq;
21
22 BOOST_HANA_CONSTANT_CHECK(hana::none_of(
23 MAKE_TUPLE(),
24 [](auto) { return hana::false_c; }
25 ));
26
27 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::none_of(
28 MAKE_TUPLE(ct_eq<0>{}),
29 [](auto) { return hana::true_c; }
30 )));
31 BOOST_HANA_CONSTANT_CHECK(hana::none_of(
32 MAKE_TUPLE(ct_eq<0>{}),
33 [](auto) { return hana::false_c; }
34 ));
35 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::none_of(
36 MAKE_TUPLE(ct_eq<0>{}),
37 hana::equal.to(ct_eq<0>{})
38 )));
39 BOOST_HANA_CONSTANT_CHECK(hana::none_of(
40 MAKE_TUPLE(ct_eq<0>{}),
41 hana::equal.to(ct_eq<999>{})
42 ));
43
44 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::none_of(
45 MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}, ct_eq<4>{}),
46 hana::equal.to(ct_eq<0>{})
47 )));
48 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::none_of(
49 MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}, ct_eq<4>{}),
50 hana::equal.to(ct_eq<1>{})
51 )));
52 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::none_of(
53 MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}, ct_eq<4>{}),
54 hana::equal.to(ct_eq<2>{})
55 )));
56 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::none_of(
57 MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}, ct_eq<4>{}),
58 hana::equal.to(ct_eq<3>{})
59 )));
60 BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::none_of(
61 MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}, ct_eq<4>{}),
62 hana::equal.to(ct_eq<4>{})
63 )));
64 BOOST_HANA_CONSTANT_CHECK(hana::none_of(
65 MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}, ct_eq<4>{}),
66 hana::equal.to(ct_eq<999>{})
67 ));
68
69 // Make sure `none_of` short-circuits with runtime predicates
70 // See http://stackoverflow.com/q/42012512/627587
71 {
72 {
73 int counter = 0;
74 auto tuple = MAKE_TUPLE(ct_eq<0>{}, ct_eq<1>{});
75 hana::none_of(tuple, [&](auto) { ++counter; return true; });
76 BOOST_HANA_RUNTIME_CHECK(counter == 1);
77 }
78 {
79 int counter = 0;
80 auto tuple = MAKE_TUPLE(ct_eq<999>{}, ct_eq<0>{}, ct_eq<999>{});
81 hana::none_of(tuple, [&](auto x) -> bool {
82 ++counter;
83 return hana::equal(x, ct_eq<0>{});
84 });
85 BOOST_HANA_RUNTIME_CHECK(counter == 2);
86 }
87 }
88 }};
89
90 #endif // !BOOST_HANA_TEST_AUTO_NONE_OF_HPP
91