1// Copyright 2023 Klemens Morgenstern
2// Distributed under the Boost Software License, Version 1.0.
3// https://www.boost.org/LICENSE_1_0.txt
4
5#include <boost/system/result.hpp>
6#include <boost/core/lightweight_test.hpp>
7#include <string>
8
9using namespace boost::system;
10
11struct X
12{
13 int v_;
14
15 explicit X( int v = 0 ): v_( v ) {}
16
17 X( X const& ) = delete;
18 X& operator=( X const& ) = delete;
19
20 X( X && ) = default;
21 X& operator=( X && ) = default;
22};
23
24int main()
25{
26 {
27 result<std::string, X> r( 1 );
28
29 BOOST_TEST( !r.has_value() );
30 BOOST_TEST( r.has_error() );
31
32 BOOST_TEST_EQ( std::move( r ).error().v_, 1 );
33 }
34
35 {
36 BOOST_TEST(( !result<std::string, X>( 1 ).has_value() ));
37 BOOST_TEST(( result<std::string, X>( 1 ).has_error() ));
38
39 BOOST_TEST_EQ( (result<std::string, X>( 1 ).error().v_), 1 );
40 }
41
42 {
43 result<std::string, X> r( "s" );
44
45 BOOST_TEST( r.has_value() );
46 BOOST_TEST( !r.has_error() );
47
48 BOOST_TEST_EQ( std::move( r ).error().v_, 0 );
49 }
50
51 {
52 BOOST_TEST(( result<std::string, X>( "s" ).has_value() ));
53 BOOST_TEST(( !result<std::string, X>( "s" ).has_error() ));
54
55 BOOST_TEST_EQ( (result<std::string, X>( "s" ).error().v_), 0 );
56 }
57
58 //
59
60 {
61 result<void, X> r( 1 );
62
63 BOOST_TEST( !r.has_value() );
64 BOOST_TEST( r.has_error() );
65
66 BOOST_TEST_EQ( std::move( r ).error().v_, 1 );
67 }
68
69 {
70 BOOST_TEST(( !result<void, X>( 1 ).has_value() ));
71 BOOST_TEST(( result<void, X>( 1 ).has_error() ));
72
73 BOOST_TEST_EQ( (result<void, X>( 1 ).error().v_), 1 );
74 }
75
76 {
77 result<void, X> r;
78
79 BOOST_TEST( r.has_value() );
80 BOOST_TEST( !r.has_error() );
81
82 BOOST_TEST_EQ( std::move( r ).error().v_, 0 );
83 }
84
85 {
86 BOOST_TEST(( result<void, X>().has_value() ));
87 BOOST_TEST(( !result<void, X>().has_error() ));
88
89 BOOST_TEST_EQ( (result<void, X>().error().v_), 0 );
90 }
91
92 //
93
94 {
95 result<double&, X> r( 1 );
96
97 BOOST_TEST( !r.has_value() );
98 BOOST_TEST( r.has_error() );
99
100 BOOST_TEST_EQ( std::move( r ).error().v_, 1 );
101 }
102
103 {
104 BOOST_TEST(( !result<double&, X>( 1 ).has_value() ));
105 BOOST_TEST(( result<double&, X>( 1 ).has_error() ));
106
107 BOOST_TEST_EQ( (result<double&, X>( 1 ).error().v_), 1 );
108 }
109
110 {
111 double x = 1.0;
112
113 result<double&, X> r( x );
114
115 BOOST_TEST( r.has_value() );
116 BOOST_TEST( !r.has_error() );
117
118 BOOST_TEST_EQ( std::move( r ).error().v_, 0 );
119 }
120
121 {
122 double x = 1.0;
123
124 BOOST_TEST(( result<double&, X>( x ).has_value() ));
125 BOOST_TEST(( !result<double&, X>( x ).has_error() ));
126
127 BOOST_TEST_EQ( (result<double&, X>( x ).error().v_), 0 );
128 }
129
130 //
131
132 return boost::report_errors();
133}
134

source code of boost/libs/system/test/result_error_move.cpp