libcxx

libcxx mirror with random patches
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plus.pass.cpp (1385B)


      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 Iter>
     15 //   move_iterator<Iter>
     16 //   operator+(Iter::difference_type n, const move_iterator<Iter>& x);
     17 //
     18 //  constexpr in C++17
     19 
     20 #include <iterator>
     21 #include <cassert>
     22 
     23 #include "test_macros.h"
     24 #include "test_iterators.h"
     25 
     26 template <class It>
     27 void
     28 test(It i, typename std::iterator_traits<It>::difference_type n, It x)
     29 {
     30     const std::move_iterator<It> r(i);
     31     std::move_iterator<It> rr = n + r;
     32     assert(rr.base() == x);
     33 }
     34 
     35 int main()
     36 {
     37     char s[] = "1234567890";
     38     test(random_access_iterator<char*>(s+5), 5, random_access_iterator<char*>(s+10));
     39     test(s+5, 5, s+10);
     40 
     41 #if TEST_STD_VER > 14
     42     {
     43     constexpr const char *p = "123456789";
     44     typedef std::move_iterator<const char *> MI;
     45     constexpr MI it1 = std::make_move_iterator(p);
     46     constexpr MI it2 = std::make_move_iterator(p + 5);
     47     constexpr MI it3 = it1 + 5;
     48     static_assert(it1 != it2, "");
     49     static_assert(it1 != it3, "");
     50     static_assert(it2 == it3, "");
     51     }
     52 #endif
     53 }