//===----------------------------------------------------------------------===//
//
// 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>

// void pop_back();

#include <vector>
#include <cassert>

#include "test_macros.h"
#include "test_allocator.h"
#include "min_allocator.h"

TEST_CONSTEXPR_CXX20 bool tests() {
  {
    std::vector<int> c;
    c.push_back(1);
    assert(c.size() == 1);
    c.pop_back();
    assert(c.size() == 0);
  }
#if TEST_STD_VER >= 11
  {
    std::vector<int, min_allocator<int>> c;
    c.push_back(1);
    assert(c.size() == 1);
    c.pop_back();
    assert(c.size() == 0);
  }
#endif

  { // LWG 526
    int arr[] = {0, 1, 2, 3, 4};
    int sz    = 5;
    std::vector<int> c(arr, arr + sz);
    while (c.size() < c.capacity())
      c.push_back(sz++);
    c.push_back(c.front());
    assert(c.back() == 0);
    for (int i = 0; i < sz; ++i)
      assert(c[i] == i);
  }

  return true;
}

int main(int, char**) {
  tests();
#if TEST_STD_VER > 17
  static_assert(tests());
#endif
  return 0;
}
