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 // requires RandomAccessIterator<Iter> 15 // move_iterator& operator+=(difference_type n); 16 // 17 // constexpr in C++17 18 19 #include <iterator> 20 #include <cassert> 21 22 #include "test_macros.h" 23 #include "test_iterators.h" 24 25 template <class It> 26 void 27 test(It i, typename std::iterator_traits<It>::difference_type n, It x) 28 { 29 std::move_iterator<It> r(i); 30 std::move_iterator<It>& rr = r += n; 31 assert(r.base() == x); 32 assert(&rr == &r); 33 } 34 35 int main() 36 { 37 const char* s = "1234567890"; 38 test(random_access_iterator<const char*>(s+5), 5, random_access_iterator<const 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 = std::make_move_iterator(p) += 5; 48 static_assert(it1 != it2, ""); 49 static_assert(it1 != it3, ""); 50 static_assert(it2 == it3, ""); 51 } 52 #endif 53 } 54
