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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
// 1999-06-08 bkoz
// Copyright (C) 1999 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 2, 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 COPYING. If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// 21.3 template class basic_string
#include <string>
#include <stdexcept>
#include <debug_assert.h>
// Do a quick sanity check on known problems with element access and
// ref-counted strings. These should all pass, regardless of the
// underlying string implementation, of course.
bool test01(void)
{
bool test = true;
typedef std::string::size_type csize_type;
typedef std::string::iterator siterator;
typedef std::string::reverse_iterator sriterator;
csize_type npos = std::string::npos;
csize_type csz01, csz02;
siterator it1;
sriterator rit1;
std::string str01("montara beach, half moon bay");
const std::string str02("ocean beach, san francisco");
std::string str03;
// 21.3 p 5
// References, pointers, and iterators referring to the elements of
// a basic_string may be invalidated by the following uses of that
// basic_string object:
// ...
// Susequent to any of the above uses except the forms of insert()
// and erase() which return iterators, the first call to non-const
// member functions operator[](), at(), begin(), rbegin(), end(), or
// rend()
str03 = str01;
it1 = str01.begin();
*it1 = 'x';
VERIFY( str01[0] == 'x' );
VERIFY( str03[0] == 'm' );
str03 = str01;
csz01 = str01.size();
rit1 = str01.rbegin(); // NB: Pointing at one-past the end, so ...
*rit1 = 'z'; // ... but it's taken care of here
VERIFY( str01[csz01 - 1] == 'z' );
VERIFY( str03[csz01 - 1] == 'y' );
str03 = str01;
csz01 = str01.size();
std::string::reference r1 = str01.at(csz01 - 2);
VERIFY( str03 == str01 );
r1 = 'd';
VERIFY( str01[csz01 - 2] == 'd' );
VERIFY( str03[csz01 - 2] == 'a' );
str03 = str01;
csz01 = str01.size();
std::string::reference r2 = str01[csz01 - 3];
VERIFY( str03 == str01 );
r2 = 'w';
VERIFY( str01[csz01 - 3] == 'w' );
VERIFY( str03[csz01 - 3] == 'b' );
str03 = str01;
csz02 = str01.size();
it1 = str01.end();
VERIFY( str03 == str01 );
--it1;
*it1 = 'q';
VERIFY( str01[csz02 - 1] == 'q' );
VERIFY( str03[csz02 - 1] == 'z' );
str03 = str01;
rit1 = str01.rend();
VERIFY( str03 == str01 );
--rit1;
*rit1 = 'p';
VERIFY( str01[0] == 'p' );
VERIFY( str03[0] == 'x' );
// need to also test for const begin/const end
#ifdef DEBUG_ASSERT
assert(test);
#endif
return test;
}
// Do another sanity check, this time for member functions that return
// iterators, namely insert and erase.
bool test02(void)
{
bool test = true;
typedef std::string::size_type csize_type;
typedef std::string::iterator siterator;
typedef std::string::reverse_iterator sriterator;
csize_type npos = std::string::npos;
csize_type csz01, csz02;
siterator it1;
sriterator rit1;
const std::string str01("its beach, santa cruz");
std::string str02 = str01;
std::string str05 = str02; // optional, so that begin below causes a mutate
std::string::iterator p = str02.insert(str02.begin(), ' ');
std::string str03 = str02;
VERIFY( str03 == str02 );
*p = '!';
VERIFY( *str03.c_str() == ' ' );
str03[0] = '@';
VERIFY( str02[0] == '!' );
VERIFY( *p == '!' );
VERIFY( str02 != str05 );
VERIFY( str02 != str03 );
std::string str10 = str01;
std::string::iterator p2 = str10.insert(str10.begin(), 'a');
std::string str11 = str10;
*p2 = 'e';
VERIFY( str11 != str10 );
std::string str06 = str01;
std::string str07 = str06; // optional, so that begin below causes a mutate
p = str06.erase(str06.begin());
std::string str08 = str06;
VERIFY( str08 == str06 );
*p = '!';
VERIFY( *str08.c_str() == 't' );
str08[0] = '@';
VERIFY( str06[0] == '!' );
VERIFY( *p == '!' );
VERIFY( str06 != str07 );
VERIFY( str06 != str08 );
std::string str12 = str01;
p2 = str12.erase(str12.begin(), str12.begin() + str12.size() - 1);
std::string str13 = str12;
*p2 = 'e';
VERIFY( str12 != str13 );
#ifdef DEBUG_ASSERT
assert(test);
#endif
return test;
}
int main()
{
test01();
test02();
return 0;
}
|
