1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// UNSUPPORTED: no-localization
// UNSUPPORTED: libcpp-has-no-experimental-syncstream
// <syncstream>
// template <class charT, class traits, class Allocator>
// class basic_syncbuf;
// Tests the inherited function using a custom allocator.
//
// int_type basic_streambuf<charT, traits>::sputc(char_type c);
//
// This test also validates the observable behaviour after move assignment and
// construction. This test uses a small so the underlying string is in short
// mode.
#include <array>
#include <syncstream>
#include <cassert>
#include <sstream>
#include "test_macros.h"
#include "test_allocator.h"
template <class CharT>
void test() {
std::array< CharT, 17> input{
CharT('a'),
CharT('1'),
CharT('+'),
CharT('A'),
CharT('g'),
CharT('0'),
CharT('@'),
CharT('Z'),
CharT('q'),
CharT('8'),
CharT('#'),
CharT('D'),
CharT('t'),
CharT('9'),
CharT('$'),
CharT('A'),
CharT(' ')};
using SyncBuf = std::basic_syncbuf<CharT, std::char_traits<CharT>, test_allocator<CharT>>;
{ // Normal
std::basic_string<CharT> expected;
std::basic_stringbuf<CharT> buf;
test_allocator_statistics stats;
test_allocator<CharT> allocator{&stats};
{
SyncBuf sync_buf{&buf, allocator};
for (int i = 0; i < 1024; ++i) {
CharT c = input[i % input.size()];
expected.push_back(c);
typename SyncBuf::int_type ret = sync_buf.sputc(c);
assert(ret == typename SyncBuf::int_type(c));
}
// The synchronization happens upon destruction of sync_buf.
assert(buf.str().empty());
assert(stats.allocated_size >= 1024);
}
assert(buf.str() == expected);
assert(stats.allocated_size == 0);
}
{ // Move construction
std::basic_stringbuf<CharT> buf;
test_allocator_statistics stats;
test_allocator<CharT> allocator{&stats};
{
SyncBuf sync_buf{&buf, allocator};
CharT c = CharT('4');
typename SyncBuf::int_type ret = sync_buf.sputc(c);
assert(ret == typename SyncBuf::int_type(c));
{
c = CharT('2');
SyncBuf new_sync_buf{std::move(sync_buf)};
ret = new_sync_buf.sputc(c);
assert(ret == typename SyncBuf::int_type(c));
// The synchronization happens upon destruction of new_sync_buf.
assert(buf.str().empty());
assert(stats.allocated_size >= 2);
}
assert(buf.str().size() == 2);
assert(buf.str()[0] == CharT('4'));
assert(buf.str()[1] == CharT('2'));
assert(stats.allocated_size == 0);
}
assert(buf.str().size() == 2);
assert(buf.str()[0] == CharT('4'));
assert(buf.str()[1] == CharT('2'));
assert(stats.allocated_size == 0);
}
{ // Move assignment non-propagating allocator
std::basic_stringbuf<CharT> buf;
test_allocator_statistics stats;
test_allocator<CharT> allocator{&stats};
static_assert(!std::allocator_traits<test_allocator<CharT>>::propagate_on_container_move_assignment::value);
{
SyncBuf sync_buf{&buf, allocator};
CharT c = CharT('4');
typename SyncBuf::int_type ret = sync_buf.sputc(c);
assert(ret == typename SyncBuf::int_type(c));
{
c = CharT('2');
SyncBuf new_sync_buf;
test_allocator<CharT> a = new_sync_buf.get_allocator();
new_sync_buf = std::move(sync_buf);
assert(new_sync_buf.get_allocator() == a);
ret = new_sync_buf.sputc(c);
assert(ret == typename SyncBuf::int_type(c));
// The synchronization happens upon destruction of new_sync_buf.
assert(buf.str().empty());
}
assert(buf.str().size() == 2);
assert(buf.str()[0] == CharT('4'));
assert(buf.str()[1] == CharT('2'));
}
assert(buf.str().size() == 2);
assert(buf.str()[0] == CharT('4'));
assert(buf.str()[1] == CharT('2'));
}
}
int main(int, char**) {
test<char>();
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
test<wchar_t>();
#endif
return 0;
}
|
