//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

// <vector>
// vector<bool>

// void shrink_to_fit();

#include <cassert>
#include <vector>

#include "increasing_allocator.h"
#include "min_allocator.h"
#include "test_macros.h"

TEST_CONSTEXPR_CXX20 bool tests() {
  {
    std::vector<bool> v(100);
    v.push_back(1);
    v.shrink_to_fit();
    assert(v.capacity() >= 101);
    assert(v.size() >= 101);
  }
#if TEST_STD_VER >= 11
  {
    std::vector<bool, min_allocator<bool>> v(100);
    v.push_back(1);
    v.shrink_to_fit();
    assert(v.capacity() >= 101);
    assert(v.size() >= 101);
  }
#endif

  return true;
}

#if TEST_STD_VER >= 23
// https://github.com/llvm/llvm-project/issues/95161
constexpr bool test_increasing_allocator() {
  std::vector<bool, increasing_allocator<bool>> v;
  v.push_back(1);
  std::size_t capacity = v.capacity();
  v.shrink_to_fit();
  assert(v.capacity() <= capacity);
  assert(v.size() == 1);

  return true;
}
#endif // TEST_STD_VER >= 23

int main(int, char**) {
  tests();
#if TEST_STD_VER > 17
  static_assert(tests());
#endif
#if TEST_STD_VER >= 23
  test_increasing_allocator();
  static_assert(test_increasing_allocator());
#endif // TEST_STD_VER >= 23

  return 0;
}