libcxx/test/std/containers/sequences/vector/vector.modifiers/pop_back.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <vector>
  10
  11 // void pop_back();
  12
  13 #include <vector>
  14 #include <cassert>
  15
  16 #include "test_macros.h"
  17 #include "test_allocator.h"
  18 #include "min_allocator.h"
  19
  20
  21 int main(int, char**)
  22 {
  23     {
  24         std::vector<int> c;
  25         c.push_back(1);
  26         assert(c.size() == 1);
  27         c.pop_back();
  28         assert(c.size() == 0);
  29
  30     }
  31 #if TEST_STD_VER >= 11
  32     {
  33         std::vector<int, min_allocator<int>> c;
  34         c.push_back(1);
  35         assert(c.size() == 1);
  36         c.pop_back();
  37         assert(c.size() == 0);
  38     }
  39 #endif
  40
  41     { // LWG 526
  42         int arr[] = {0, 1, 2, 3, 4};
  43         int sz = 5;
  44         std::vector<int> c(arr, arr+sz);
  45         while (c.size() < c.capacity())
  46             c.push_back(sz++);
  47         c.push_back(c.front());
  48         assert(c.back() == 0);
  49         for (int i = 0; i < sz; ++i)
  50             assert(c[i] == i);
  51     }
  52
  53   return 0;
  54 }