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      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, Callable<auto, Iter::reference> Function>
     13 //   requires CopyConstructible<Function>
     14 //   Function
     15 //   for_each(Iter first, Iter last, Function f);
     16 
     17 #include <algorithm>
     18 #include <cassert>
     19 
     20 #include "test_iterators.h"
     21 
     22 struct for_each_test
     23 {
     24     for_each_test(int c) : count(c) {}
     25     int count;
     26     void operator()(int& i) {++i; ++count;}
     27 };
     28 
     29 int main()
     30 {
     31     int ia[] = {0, 1, 2, 3, 4, 5};
     32     const unsigned s = sizeof(ia)/sizeof(ia[0]);
     33     for_each_test f = std::for_each(input_iterator<int*>(ia),
     34                                     input_iterator<int*>(ia+s),
     35                                     for_each_test(0));
     36     assert(f.count == s);
     37     for (unsigned i = 0; i < s; ++i)
     38         assert(ia[i] == static_cast<int>(i+1));
     39 }
     40