| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <iterator> |
| |
| // move_iterator |
| |
| // move_iterator& operator--(); |
| // |
| // constexpr in C++17 |
| |
| #include <iterator> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "test_iterators.h" |
| |
| template <class It> |
| void |
| test(It i, It x) |
| { |
| std::move_iterator<It> r(i); |
| std::move_iterator<It>& rr = --r; |
| assert(r.base() == x); |
| assert(&rr == &r); |
| } |
| |
| int main() |
| { |
| char s[] = "123"; |
| test(bidirectional_iterator<char*>(s+1), bidirectional_iterator<char*>(s)); |
| test(random_access_iterator<char*>(s+1), random_access_iterator<char*>(s)); |
| test(s+1, s); |
| |
| #if TEST_STD_VER > 14 |
| { |
| constexpr const char *p = "123456789"; |
| typedef std::move_iterator<const char *> MI; |
| constexpr MI it1 = std::make_move_iterator(p); |
| constexpr MI it2 = std::make_move_iterator(p+1); |
| static_assert(it1 != it2, ""); |
| constexpr MI it3 = -- std::make_move_iterator(p+1); |
| static_assert(it1 == it3, ""); |
| static_assert(it2 != it3, ""); |
| } |
| #endif |
| } |