1bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 2bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 3f5256e16dfc425c1d466f6308d4026d529ce9e0bHoward Hinnant// The LLVM Compiler Infrastructure 4bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 8bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 9bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 10bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// <iterator> 11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 12bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// move_iterator 13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 14712522cfd8f61321b4f197ec0de02b0146afb5a5Howard Hinnant// requires RandomAccessIterator<Iter> 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// move_iterator operator-(difference_type n) const; 16f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow// 17f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow// constexpr in C++17 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <iterator> 20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert> 21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 22f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow#include "test_macros.h" 2383e2c4d877fe2d7793868b1c6a5d9525a7c4d431Marshall Clow#include "test_iterators.h" 24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnanttemplate <class It> 26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantvoid 27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnanttest(It i, typename std::iterator_traits<It>::difference_type n, It x) 28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant const std::move_iterator<It> r(i); 30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::move_iterator<It> rr = r - n; 31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(rr.base() == x); 32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main() 35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant const char* s = "1234567890"; 37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test(random_access_iterator<const char*>(s+5), 5, random_access_iterator<const char*>(s)); 38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test(s+5, 5, s); 39f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow 40f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow#if TEST_STD_VER > 14 41f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow { 42f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow constexpr const char *p = "123456789"; 43f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow typedef std::move_iterator<const char *> MI; 44f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow constexpr MI it1 = std::make_move_iterator(p); 45f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow constexpr MI it2 = std::make_move_iterator(p + 5); 46f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow constexpr MI it3 = it2 - 5; 47f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow static_assert(it1 != it2, ""); 48f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow static_assert(it1 == it3, ""); 49f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow static_assert(it2 != it3, ""); 50f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow } 51f333beee2ce44299b1ce219371bdef60290ac175Marshall Clow#endif 52bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 53