blob: 02ce78ea6280228a1ae11cbe7fd4a4b2ff637e57 (
plain)
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
|
// 2004-11-29 Paolo Carlini <pcarlini@suse.de>
// Copyright (C) 2004-2021 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
// 21.3.3 string capacity
// { dg-options "-DMAX_SIZE=16" { target simulator } }
#ifndef MAX_SIZE
#define MAX_SIZE 20
#endif
#include <string>
#include <testsuite_hooks.h>
// libstdc++/18654
void test01()
{
using namespace std;
typedef string::size_type size_type;
#if _GLIBCXX_USE_CXX11_ABI
// Can't shrink below small string size.
const size_type minsize = string().capacity() + 1;
#else
// Exact shrink-to-size and shrink-to-fit
const size_type minsize = 2 << 0;
#endif
const size_type maxsize = 2 << MAX_SIZE;
for (size_type i = minsize; i <= maxsize; i *= 2)
{
string str(i, 'x');
str.reserve(3 * i);
const size_type cap = str.capacity();
VERIFY( cap >= 3 * i );
str.reserve(2 * i);
VERIFY( str.capacity() == cap );
#if __cplusplus <= 201703L
str.reserve();
#else
str.shrink_to_fit(); // reserve is deprecated in C++20
#endif
VERIFY( str.capacity() == i );
}
}
int main()
{
test01();
return 0;
}
|