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83ffe9cd | 1 | // Copyright (C) 2014-2023 Free Software Foundation, Inc. |
9b817548 JW |
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 | ||
52066eae | 18 | // { dg-do run { target c++11 } } |
9b817548 JW |
19 | // { dg-require-fileio "" } |
20 | ||
21 | // 27.9.1.8 Assign and swap [ifstream.assign] | |
22 | ||
23 | #include <fstream> | |
24 | #include <sstream> | |
25 | #include <testsuite_hooks.h> | |
26 | ||
27 | void | |
28 | read(std::istream& in, std::ostream& out) | |
29 | { | |
30 | std::string s; | |
31 | for (int i=0; i < 10; ++i) | |
32 | { | |
33 | getline(in, s); | |
34 | out << s << '\n'; | |
35 | } | |
36 | } | |
37 | ||
38 | void | |
39 | test01() | |
40 | { | |
41 | std::string const name = "thirty_years_among_the_dead_preproc.txt"; | |
42 | std::ostringstream ss0; | |
43 | { | |
44 | std::ifstream f0(name); | |
45 | read(f0, ss0); | |
46 | } | |
47 | { | |
48 | std::ifstream f0(name); | |
49 | std::ifstream f1; | |
50 | f1 = std::move(f0); | |
51 | VERIFY( !f0.is_open() ); | |
52 | VERIFY( f1.is_open() ); | |
53 | std::ostringstream ss1; | |
54 | read(f1, ss1); | |
55 | VERIFY( ss0.str() == ss1.str() ); | |
56 | } | |
57 | { | |
58 | std::ifstream f0(name); | |
59 | std::ifstream f1; | |
60 | f1.swap(f0); | |
61 | VERIFY( !f0.is_open() ); | |
62 | VERIFY( f1.is_open() ); | |
63 | std::ostringstream ss1; | |
64 | read(f1, ss1); | |
65 | VERIFY( ss0.str() == ss1.str() ); | |
66 | } | |
67 | } | |
68 | ||
69 | void | |
70 | test02() | |
71 | { | |
72 | #ifdef _GLIBCXX_USE_WCHAR_T | |
73 | std::wifstream f, f2; | |
74 | f2 = std::move(f); | |
75 | f2.swap(f); | |
76 | swap(f2, f); | |
77 | #endif | |
78 | } | |
79 | ||
80 | int | |
81 | main() | |
82 | { | |
83 | test01(); | |
84 | test02(); | |
85 | } |