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99dee823 | 1 | // Copyright (C) 2019-2021 Free Software Foundation, Inc. |
8ab38f6c FD |
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 | ||
18 | // { dg-do run { target c++11 } } | |
19 | ||
20 | #include <algorithm> | |
21 | #include <sstream> | |
22 | #include <iterator> | |
23 | ||
24 | #include <testsuite_hooks.h> | |
25 | ||
26 | void test01() | |
27 | { | |
28 | std::stringstream ss("12345"); | |
29 | ||
30 | std::string ostr(5, '0'); | |
31 | typedef std::istreambuf_iterator<char> istrb_ite; | |
32 | auto res = std::copy_n(istrb_ite(ss), 0, ostr.begin()); | |
33 | VERIFY( res == ostr.begin() ); | |
34 | VERIFY( ostr.front() == '0' ); | |
35 | ||
36 | res = std::copy_n(istrb_ite(ss), 2, ostr.begin()); | |
37 | VERIFY( res == ostr.begin() + 2 ); | |
38 | VERIFY( ostr == "12000" ); | |
39 | ||
40 | res = std::copy_n(istrb_ite(ss), 3, ostr.begin() + 2); | |
41 | VERIFY( res == ostr.begin() + 5 ); | |
42 | VERIFY( ostr == "12345" ); | |
43 | } | |
44 | ||
45 | void test02() | |
46 | { | |
47 | std::stringstream ss("12345"); | |
48 | ||
49 | std::string ostr(5, '0'); | |
50 | typedef std::istreambuf_iterator<char> istrb_ite; | |
51 | ||
52 | istrb_ite ibfit(ss); | |
53 | auto res = std::copy_n(ibfit, 3, std::copy_n(ibfit, 2, ostr.begin())); | |
54 | VERIFY( res == ostr.begin() + 5 ); | |
55 | VERIFY( ostr == "12345" ); | |
56 | } | |
57 | ||
58 | void test03() | |
59 | { | |
60 | std::string ostr(5, '0'); | |
61 | typedef std::istreambuf_iterator<char> istrb_ite; | |
62 | ||
63 | auto res = std::copy_n(istrb_ite(), 0, ostr.begin()); | |
64 | VERIFY( res == ostr.begin() ); | |
65 | } | |
66 | ||
67 | int main() | |
68 | { | |
69 | test01(); | |
70 | test02(); | |
71 | test03(); | |
72 | return 0; | |
73 | } |