1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // <algorithm>
11
12 // template<InputIterator Iter, Predicate<auto, Iter::value_type> Pred>
13 // requires CopyConstructible<Pred>
14 // Iter::difference_type
15 // count_if(Iter first, Iter last, Pred pred);
16
17 #include <algorithm>
18 #include <functional>
19 #include <cassert>
20
21 #include "test_iterators.h"
22
main()23 int main()
24 {
25 int ia[] = {0, 1, 2, 2, 0, 1, 2, 3};
26 const unsigned sa = sizeof(ia)/sizeof(ia[0]);
27 assert(std::count_if(input_iterator<const int*>(ia),
28 input_iterator<const int*>(ia + sa),
29 std::bind2nd(std::equal_to<int>(),2)) == 3);
30 assert(std::count_if(input_iterator<const int*>(ia),
31 input_iterator<const int*>(ia + sa),
32 std::bind2nd(std::equal_to<int>(),7)) == 0);
33 assert(std::count_if(input_iterator<const int*>(ia),
34 input_iterator<const int*>(ia),
35 std::bind2nd(std::equal_to<int>(),2)) == 0);
36 }
37