1
2// Copyright 2017 Peter Dimov.
3//
4// Distributed under the Boost Software License, Version 1.0.
5//
6// See accompanying file LICENSE_1_0.txt or copy at
7// http://www.boost.org/LICENSE_1_0.txt
8
9#include <boost/variant2/variant.hpp>
10#include <boost/core/lightweight_test.hpp>
11#include <boost/core/lightweight_test_trait.hpp>
12#include <type_traits>
13#include <utility>
14#include <string>
15
16using namespace boost::variant2;
17
18struct X
19{
20};
21
22inline bool operator<( X const&, X const& ) { return false; }
23inline bool operator>( X const&, X const& ) { return false; }
24inline bool operator<=( X const&, X const& ) { return false; }
25inline bool operator>=( X const&, X const& ) { return false; }
26
27#define TEST_EQ( v1, v2 ) \
28 BOOST_TEST_NOT( v1 < v2 ); \
29 BOOST_TEST_NOT( v1 > v2 ); \
30 BOOST_TEST( v1 <= v2 ); \
31 BOOST_TEST( v1 >= v2 );
32
33#define TEST_LE( v1, v3 ) \
34 BOOST_TEST( v1 < v3 ); \
35 BOOST_TEST( v3 > v1 ); \
36 BOOST_TEST_NOT( v1 > v3 ); \
37 BOOST_TEST_NOT( v3 < v1 ); \
38 BOOST_TEST( v1 <= v3 ); \
39 BOOST_TEST( v3 >= v1 ); \
40 BOOST_TEST_NOT( v1 >= v3 ); \
41 BOOST_TEST_NOT( v3 <= v1 );
42
43int main()
44{
45 {
46 variant<int> v1, v2, v3( 1 ), v4( 1 );
47
48 TEST_EQ( v1, v2 )
49 TEST_LE( v1, v3 )
50 TEST_EQ( v3, v4 )
51 }
52
53 {
54 variant<int, float> v1, v2, v3( 1 ), v4( 1 ), v5( 3.14f ), v6( 3.14f );
55
56 TEST_EQ( v1, v2 )
57 TEST_LE( v1, v3 )
58 TEST_EQ( v3, v4 )
59 TEST_LE( v1, v5 )
60 TEST_LE( v3, v5 )
61 TEST_EQ( v5, v6 )
62 }
63
64 {
65 variant<int, int, float> v1, v2, v3( in_place_index_t<1>{} ), v4( in_place_index_t<1>{} ), v5( 3.14f ), v6( 3.14f );
66
67 TEST_EQ( v1, v2 )
68 TEST_LE( v1, v3 )
69 TEST_EQ( v3, v4 )
70 TEST_LE( v1, v5 )
71 TEST_LE( v3, v5 )
72 TEST_EQ( v5, v6 )
73 }
74
75 {
76 variant<X> v1, v2;
77
78 BOOST_TEST_NOT( v1 < v2 );
79 BOOST_TEST_NOT( v1 > v2 );
80 BOOST_TEST_NOT( v1 <= v2 );
81 BOOST_TEST_NOT( v1 >= v2 );
82 }
83
84 {
85 variant<monostate> v1, v2;
86
87 BOOST_TEST_NOT( v1 < v2 );
88 BOOST_TEST_NOT( v1 > v2 );
89 BOOST_TEST( v1 <= v2 );
90 BOOST_TEST( v1 >= v2 );
91 }
92
93 return boost::report_errors();
94}
95

source code of boost/libs/variant2/test/variant_lt_gt.cpp