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 <random> 19 #include <cassert> 20 21 std::mt19937 randomness; 22 23 void test(int N) 24 { 25 int* ia = new int [N]; 26 for (int i = 0; i < N; ++i) 27 ia[i] = i; 28 std::shuffle(ia, ia+N, randomness); 29 std::make_heap(ia, ia+N); 30 for (int i = N; i > 0; --i) 31 { 32 std::pop_heap(ia, ia+i); 33 assert(std::is_heap(ia, ia+i-1)); 34 } 35 std::pop_heap(ia, ia); 36 delete [] ia; 37 } 38 39 int main() 40 { 41 test(1000); 42 } 43
