libcxx/test/std/containers/sequences/vector.bool/size.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 // class vector
  12
  13 // size_type size() const noexcept;
  14
  15 #include <vector>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19 #include "min_allocator.h"
  20
  21 TEST_CONSTEXPR_CXX20 bool tests()
  22 {
  23     {
  24     typedef std::vector<bool> C;
  25     C c;
  26     ASSERT_NOEXCEPT(c.size());
  27     assert(c.size() == 0);
  28     c.push_back(false);
  29     assert(c.size() == 1);
  30     c.push_back(true);
  31     assert(c.size() == 2);
  32     c.push_back(false);
  33     assert(c.size() == 3);
  34     c.erase(c.begin());
  35     assert(c.size() == 2);
  36     c.erase(c.begin());
  37     assert(c.size() == 1);
  38     c.erase(c.begin());
  39     assert(c.size() == 0);
  40     }
  41 #if TEST_STD_VER >= 11
  42     {
  43     typedef std::vector<bool, min_allocator<bool>> C;
  44     C c;
  45     ASSERT_NOEXCEPT(c.size());
  46     assert(c.size() == 0);
  47     c.push_back(false);
  48     assert(c.size() == 1);
  49     c.push_back(true);
  50     assert(c.size() == 2);
  51     c.push_back(false);
  52     assert(c.size() == 3);
  53     c.erase(c.begin());
  54     assert(c.size() == 2);
  55     c.erase(c.begin());
  56     assert(c.size() == 1);
  57     c.erase(c.begin());
  58     assert(c.size() == 0);
  59     }
  60 #endif
  61
  62     return true;
  63 }
  64
  65 int main(int, char**)
  66 {
  67     tests();
  68 #if TEST_STD_VER > 17
  69     static_assert(tests());
  70 #endif
  71     return 0;
  72 }