| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // make_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() |
| { |
| int orig[15] = {3,1,4,1,5, 9,2,6,5,3, 5,8,9,7,9}; |
| T work[15] = {3,1,4,1,5, 9,2,6,5,3, 5,8,9,7,9}; |
| for (int n = 0; n < 15; ++n) { |
| std::make_heap(Iter(work), Iter(work+n), std::greater<T>()); |
| assert(std::is_heap(work, work+n, std::greater<T>())); |
| assert(std::is_permutation(work, work+n, orig)); |
| std::copy(orig, orig+n, work); |
| } |
| |
| { |
| T input[] = {3, 4, 1, 2, 5}; |
| std::make_heap(Iter(input), Iter(input + 5), std::greater<T>()); |
| assert(std::is_heap(input, input + 5, std::greater<T>())); |
| std::pop_heap(input, input + 5, std::greater<T>()); assert(input[4] == 1); |
| std::pop_heap(input, input + 4, std::greater<T>()); assert(input[3] == 2); |
| std::pop_heap(input, input + 3, std::greater<T>()); assert(input[2] == 3); |
| std::pop_heap(input, input + 2, std::greater<T>()); assert(input[1] == 4); |
| std::pop_heap(input, 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; |
| } |