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      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 // move_iterator
     13 
     14 // template <RandomAccessIterator Iter1, RandomAccessIterator Iter2>
     15 //   requires HasMinus<Iter1, Iter2>
     16 //   auto
     17 //   operator-(const move_iterator<Iter1>& x, const move_iterator<Iter2>& y)
     18 //   -> decltype(x.base() - y.base());
     19 
     20 #include <iterator>
     21 #include <cassert>
     22 
     23 #include "test_iterators.h"
     24 
     25 template <class It>
     26 void
     27 test(It l, It r, typename std::iterator_traits<It>::difference_type x)
     28 {
     29     const std::move_iterator<It> r1(l);
     30     const std::move_iterator<It> r2(r);
     31     assert(r1 - r2 == x);
     32 }
     33 
     34 int main()
     35 {
     36     char s[] = "1234567890";
     37     test(random_access_iterator<char*>(s+5), random_access_iterator<char*>(s), 5);
     38     test(s+5, s, 5);
     39 }
     40