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> && LessThanComparable<Iter::value_type>
14//   void
15//   pop_heap(Iter first, Iter last);
16
17#include <algorithm>
18#include <cassert>
19
20void test(unsigned N)
21{
22    int* ia = new int [N];
23    for (int i = 0; i < N; ++i)
24        ia[i] = i;
25    std::random_shuffle(ia, ia+N);
26    std::make_heap(ia, ia+N);
27    for (int i = N; i > 0; --i)
28    {
29        std::pop_heap(ia, ia+i);
30        assert(std::is_heap(ia, ia+i-1));
31    }
32    std::pop_heap(ia, ia);
33    delete [] ia;
34}
35
36int main()
37{
38    test(1000);
39}
40