1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // <iterator>
10
11 // class istream_iterator
12
13 // template <class T, class charT, class traits, class Distance>
14 // bool operator==(const istream_iterator<T,charT,traits,Distance> &x,
15 // const istream_iterator<T,charT,traits,Distance> &y);
16 //
17 // template <class T, class charT, class traits, class Distance>
18 // bool operator!=(const istream_iterator<T,charT,traits,Distance> &x,
19 // const istream_iterator<T,charT,traits,Distance> &y);
20 //
21 // friend bool operator==(const istream_iterator& i, default_sentinel_t); // since C++20
22
23 #include <iterator>
24 #include <sstream>
25 #include <cassert>
26
27 #include "test_macros.h"
28
main(int,char **)29 int main(int, char**) {
30 {
31 std::istringstream inf1(" 1 23");
32 std::istringstream inf2(" 1 23");
33 std::istream_iterator<int> i1(inf1);
34 std::istream_iterator<int> i2(inf1);
35 std::istream_iterator<int> i3(inf2);
36 std::istream_iterator<int> i4;
37 std::istream_iterator<int> i5;
38 assert(i1 == i1);
39 assert(i1 == i2);
40 assert(i1 != i3);
41 assert(i1 != i4);
42 assert(i1 != i5);
43
44 assert(i2 == i2);
45 assert(i2 != i3);
46 assert(i2 != i4);
47 assert(i2 != i5);
48
49 assert(i3 == i3);
50 assert(i3 != i4);
51 assert(i3 != i5);
52
53 assert(i4 == i4);
54 assert(i4 == i5);
55
56 assert(std::operator==(i1, i2));
57 #if TEST_STD_VER <= 17
58 assert(std::operator!=(i1, i3));
59 #endif
60 }
61
62 #if TEST_STD_VER > 17
63 {
64 std::istream_iterator<int> i1;
65 std::istream_iterator<int> i2(std::default_sentinel);
66 assert(i1 == i2);
67
68 assert(i1 == std::default_sentinel);
69 assert(i2 == std::default_sentinel);
70 assert(std::default_sentinel == i1);
71 assert(std::default_sentinel == i2);
72 assert(!(i1 != std::default_sentinel));
73 assert(!(i2 != std::default_sentinel));
74 assert(!(std::default_sentinel != i1));
75 assert(!(std::default_sentinel != i2));
76
77 std::istringstream stream(" 1 23");
78 std::istream_iterator<int> i3(stream);
79
80 assert(!(i3 == std::default_sentinel));
81 assert(!(std::default_sentinel == i3));
82 assert(i3 != std::default_sentinel);
83 assert(std::default_sentinel != i3);
84 }
85 #endif
86
87 return 0;
88 }
89