libcxx/test/std/containers/sequences/vector.bool/reference/ctor_copy.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 // reference(const reference&)
  12
  13 #include <cassert>
  14 #include <vector>
  15
  16 #include "test_macros.h"
  17
  18 TEST_CONSTEXPR_CXX20 bool test() {
  19   std::vector<bool> vec;
  20   typedef std::vector<bool>::reference Ref;
  21   vec.push_back(true);
  22   Ref ref = vec[0];
  23   Ref ref2 = ref;
  24   assert(ref == ref2 && ref2);
  25   ref.flip();
  26   assert(ref == ref2 && !ref2);
  27
  28   return true;
  29 }
  30
  31 int main(int, char**) {
  32   test();
  33 #if TEST_STD_VER > 17
  34     static_assert(test());
  35 #endif
  36
  37   return 0;
  38 }