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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<RandomAccessIterator Iter>
     13 //   requires ShuffleIterator<Iter>
     14 //         && LessThanComparable<Iter::value_type>
     15 //   void
     16 //   push_heap(Iter first, Iter last);
     17 
     18 #include <algorithm>
     19 #include <cassert>
     20 
     21 void test(unsigned N)
     22 {
     23     int* ia = new int [N];
     24     for (int i = 0; i < N; ++i)
     25         ia[i] = i;
     26     std::random_shuffle(ia, ia+N);
     27     for (int i = 0; i <= N; ++i)
     28     {
     29         std::push_heap(ia, ia+i);
     30         assert(std::is_heap(ia, ia+i));
     31     }
     32     delete [] ia;
     33 }
     34 
     35 int main()
     36 {
     37     test(1000);
     38 }
     39