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