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85ec4feb | 1 | // Copyright (C) 2001-2018 Free Software Foundation, Inc. |
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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 | |
748086b7 | 6 | // Free Software Foundation; either version 3, or (at your option) |
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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 | |
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15 | // with this library; see the file COPYING3. If not see |
16 | // <http://www.gnu.org/licenses/>. | |
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17 | |
18 | // 25.3.3 [lib.alg.binary.search] Binary search algorithms. | |
19 | ||
20 | #include <algorithm> | |
21 | #include <testsuite_hooks.h> | |
22 | ||
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23 | const int A[] = {1, 2, 3, 3, 3, 5, 8}; |
24 | const int C[] = {8, 5, 3, 3, 3, 2, 1}; | |
25 | const int N = sizeof(A) / sizeof(int); | |
26 | ||
27 | // A comparison, equalivalent to std::greater<int> without the | |
28 | // dependency on <functional>. | |
29 | struct gt | |
30 | { | |
31 | bool | |
32 | operator()(const int& x, const int& y) const | |
33 | { return x > y; } | |
34 | }; | |
35 | ||
36 | // Each test performs general-case, bookend, not-found condition, | |
37 | // and predicate functional checks. | |
38 | ||
39 | // 25.3.3.3 equal_range, with and without comparison predicate | |
40 | void | |
41 | test03() | |
42 | { | |
43 | using std::equal_range; | |
44 | typedef std::pair<const int*, const int*> Ipair; | |
45 | ||
46 | const int first = A[0]; | |
47 | const int last = A[N - 1]; | |
48 | ||
49 | Ipair p = equal_range(A, A + N, 3); | |
50 | VERIFY(p.first == A + 2); | |
51 | VERIFY(p.second == A + 5); | |
52 | ||
53 | Ipair q = equal_range(A, A + N, first); | |
54 | VERIFY(q.first == A + 0); | |
55 | VERIFY(q.second == A + 1); | |
56 | ||
57 | Ipair r = equal_range(A, A + N, last); | |
58 | VERIFY(r.first == A + N - 1); | |
59 | VERIFY(r.second == A + N); | |
60 | ||
61 | Ipair s = equal_range(A, A + N, 4); | |
62 | VERIFY(s.first == A + 5); | |
63 | VERIFY(s.second == A + 5); | |
64 | ||
65 | Ipair t = equal_range(C, C + N, 3, gt()); | |
66 | VERIFY(t.first == C + 2); | |
67 | VERIFY(t.second == C + 5); | |
68 | ||
69 | Ipair u = equal_range(C, C + N, first, gt()); | |
70 | VERIFY(u.first == C + N - 1); | |
71 | VERIFY(u.second == C + N); | |
72 | ||
73 | Ipair v = equal_range(C, C + N, last, gt()); | |
74 | VERIFY(v.first == C + 0); | |
75 | VERIFY(v.second == C + 1); | |
76 | ||
77 | Ipair w = equal_range(C, C + N, 4, gt()); | |
78 | VERIFY(w.first == C + 2); | |
79 | VERIFY(w.second == C + 2); | |
80 | } | |
81 | ||
82 | int | |
83 | main() | |
84 | { | |
85 | test03(); | |
86 | return 0; | |
87 | } |