libcxx/test/std/iterators/predef.iterators/reverse.iterators/reverse.iter.conv/base.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 // <iterator>
  10
  11 // reverse_iterator
  12
  13 // iterator_type base() const; // constexpr since C++17
  14
  15 #include <iterator>
  16 #include <cassert>
  17
  18 #include "test_macros.h"
  19 #include "test_iterators.h"
  20
  21 TEST_CONSTEXPR_CXX17 bool test() {
  22     typedef bidirectional_iterator<int*> Iter;
  23     int i = 0;
  24     Iter iter(&i);
  25     std::reverse_iterator<Iter> const reverse(iter);
  26     std::reverse_iterator<Iter>::iterator_type base = reverse.base();
  27     assert(base == Iter(&i));
  28     return true;
  29 }
  30
  31 int main(int, char**) {
  32     test();
  33 #if TEST_STD_VER > 14
  34     static_assert(test(), "");
  35 #endif
  36     return 0;
  37 }