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4.cc
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1// Copyright (C) 2013-2023 Free Software Foundation, Inc.
2//
3// This file is part of the GNU ISO C++ Library. This library is free
4// software; you can redistribute it and/or modify it under the
5// terms of the GNU General Public License as published by the
6// Free Software Foundation; either version 3, or (at your option)
7// any later version.
8
9// This library is distributed in the hope that it will be useful,
10// but WITHOUT ANY WARRANTY; without even the implied warranty of
11// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12// GNU General Public License for more details.
13
14// You should have received a copy of the GNU General Public License along
15// with this library; see the file COPYING3. If not see
16// <http://www.gnu.org/licenses/>.
17
18namespace assign_4 {
19
20struct exception {};
21
22static int counter = 0;
23
30
31struct value_type : private mixin_counter
32{
44
45 value_type() = default;
46
47 explicit value_type(state_type state_)
48 : state(state_)
49 {
51 }
52
53 value_type(value_type const& other)
54 : state(other.state)
55 {
57 }
58
60 operator=(value_type const& other)
61 {
62 state = other.state;
64 return *this;
65 }
66
68 : state(other.state)
69 {
70 other.state = moved_from;
72 }
73
76 {
77 state = other.state;
78 other.state = moved_from;
80 return *this;
81 }
82
83 void throw_if(state_type match)
84 {
85 if(state == match)
86 {
87 state = threw;
88 throw exception {};
89 }
90 }
91
93};
94
95static void
97{
98 using O = gdb::optional<value_type>;
100 auto const make = [](S s = S::zero) { return value_type { s }; };
101
102 enum outcome_type { nothrow, caught, bad_catch };
103
104 // Check value assignment for engaged optional
105
106 {
107 O o = make();
108 value_type v = make(S::throwing_copy);
109 o = v;
110 VERIFY( o && o->state == S::throwing_copy);
111 }
112
113 {
114 O o = make();
115 value_type v = make(S::throwing_move);
116 o = std::move(v);
117 VERIFY( o && o->state == S::throwing_move);
118 }
119
120 {
121 ATTRIBUTE_UNUSED outcome_type outcome {};
122 O o = make();
123 value_type v = make(S::throwing_copy_assignment);
124
125 try
126 {
127 o = v;
128 }
129 catch(exception const&)
130 { outcome = caught; }
131 catch(...)
132 { outcome = bad_catch; }
133
134 VERIFY( o && o->state == S::threw );
135 }
136
137 {
138 ATTRIBUTE_UNUSED outcome_type outcome {};
139 O o = make();
140 value_type v = make(S::throwing_move_assignment);
141
142 try
143 {
144 o = std::move(v);
145 }
146 catch(exception const&)
147 { outcome = caught; }
148 catch(...)
149 { outcome = bad_catch; }
150
151 VERIFY( o && o->state == S::threw );
152 }
153
154 VERIFY( counter == 0 );
155}
156
157} // namespace assign_4
#define VERIFY(x)
#define S(reg)
Definition m32c-tdep.c:797
Definition 4.cc:18
static int counter
Definition 4.cc:22
static void test()
Definition 4.cc:96
mixin_counter(mixin_counter const &)
Definition 4.cc:27
value_type(value_type const &other)
Definition 4.cc:53
value_type(state_type state_)
Definition 4.cc:47
value_type & operator=(value_type &&other)
Definition 4.cc:75
void throw_if(state_type match)
Definition 4.cc:83
state_type state
Definition 4.cc:92
value_type & operator=(value_type const &other)
Definition 4.cc:60
value_type(value_type &&other)
Definition 4.cc:67
@ throwing_move_assignment
Definition 4.cc:41
@ throwing_copy_assignment
Definition 4.cc:39
@ throwing_construction
Definition 4.cc:37