1// Copyright (C) 2001-2015 Free Software Foundation, Inc.
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// 25.3.3 [lib.alg.binary.search] Binary search algorithms.
19
20#include <algorithm>
21#include <testsuite_hooks.h>
22
23bool test __attribute__((unused)) = true;
24
25const int A[] = {1, 2, 3, 3, 3, 5, 8};
26const int C[] = {8, 5, 3, 3, 3, 2, 1};
27const int N = sizeof(A) / sizeof(int);
28
29// A comparison, equalivalent to std::greater<int> without the
30// dependency on <functional>.
31struct gt
32{
33    bool
34    operator()(const int& x, const int& y) const
35    { return x > y; }
36};
37
38// 25.3.3.4 binary_search, with and without comparison predicate
39void
40test04()
41{
42    using std::binary_search;
43
44    const int first = A[0];
45    const int last = A[N - 1];
46
47    VERIFY(binary_search(A, A + N, 5));
48    VERIFY(binary_search(A, A + N, first));
49    VERIFY(binary_search(A, A + N, last));
50    VERIFY(!binary_search(A, A + N, 4));
51
52    VERIFY(binary_search(C, C + N, 5, gt()));
53    VERIFY(binary_search(C, C + N, first, gt()));
54    VERIFY(binary_search(C, C + N, last, gt()));
55    VERIFY(!binary_search(C, C + N, 4, gt()));
56}
57
58int
59main()
60{
61  test04();
62  return 0;
63}
64