| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <algorithm> |
| |
| // template<RandomAccessIterator Iter> |
| // requires ShuffleIterator<Iter> && LessThanComparable<Iter::value_type> |
| // constexpr void // constexpr in C++20 |
| // pop_heap(Iter first, Iter last, Compare comp); |
| |
| #include <algorithm> |
| #include <cassert> |
| #include <functional> |
| |
| #include "test_macros.h" |
| #include "test_iterators.h" |
| #include "MoveOnly.h" |
| |
| template<class T, class Iter> |
| TEST_CONSTEXPR_CXX20 bool test() |
| { |
| T orig[15] = {1,1,2,3,3, 8,4,6,5,5, 5,9,9,7,9}; |
| T work[15] = {1,1,2,3,3, 8,4,6,5,5, 5,9,9,7,9}; |
| assert(std::is_heap(orig, orig+15, std::greater<T>())); |
| for (int i = 15; i >= 1; --i) { |
| std::pop_heap(Iter(work), Iter(work+i), std::greater<T>()); |
| assert(std::is_heap(work, work+i-1, std::greater<T>())); |
| assert(std::min_element(work, work+i-1) == work); |
| assert(std::is_permutation(work, work+15, orig)); |
| } |
| assert(std::is_sorted(work, work+15, std::greater<T>())); |
| |
| { |
| T input[] = {1, 2, 5, 4, 3}; |
| assert(std::is_heap(input, input + 5, std::greater<T>())); |
| std::pop_heap(Iter(input), Iter(input + 5), std::greater<T>()); assert(input[4] == 1); |
| std::pop_heap(Iter(input), Iter(input + 4), std::greater<T>()); assert(input[3] == 2); |
| std::pop_heap(Iter(input), Iter(input + 3), std::greater<T>()); assert(input[2] == 3); |
| std::pop_heap(Iter(input), Iter(input + 2), std::greater<T>()); assert(input[1] == 4); |
| std::pop_heap(Iter(input), Iter(input + 1), std::greater<T>()); assert(input[0] == 5); |
| } |
| return true; |
| } |
| |
| int main(int, char**) |
| { |
| test<int, random_access_iterator<int*> >(); |
| test<int, int*>(); |
| |
| #if TEST_STD_VER >= 11 |
| test<MoveOnly, random_access_iterator<MoveOnly*>>(); |
| test<MoveOnly, MoveOnly*>(); |
| #endif |
| |
| #if TEST_STD_VER >= 20 |
| static_assert(test<int, random_access_iterator<int*>>()); |
| static_assert(test<int, int*>()); |
| static_assert(test<MoveOnly, random_access_iterator<MoveOnly*>>()); |
| static_assert(test<MoveOnly, MoveOnly*>()); |
| #endif |
| |
| return 0; |
| } |