test/std/iterators/predef.iterators/reverse.iterators/reverse.iter.ops/reverse.iter.op++/pre.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 // <iterator>
  11
  12 // reverse_iterator
  13
  14 // reverse_iterator& operator++();
  15
  16 #include <iterator>
  17 #include <cassert>
  18
  19 #include "test_iterators.h"
  20
  21 template <class It>
  22 void
  23 test(It i, It x)
  24 {
  25     std::reverse_iterator<It> r(i);
  26     std::reverse_iterator<It>& rr = ++r;
  27     assert(r.base() == x);
  28     assert(&rr == &r);
  29 }
  30
  31 int main()
  32 {
  33     const char* s = "123";
  34     test(bidirectional_iterator<const char*>(s+1), bidirectional_iterator<const char*>(s));
  35     test(random_access_iterator<const char*>(s+1), random_access_iterator<const char*>(s));
  36     test(s+1, s);
  37 }