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// unspecified operator[](difference_type n) const; 16// 17// constexpr in C++17 18 19#include <iterator> 20#include <cassert> 21#include <memory> 22 23#include "test_macros.h" 24#include "test_iterators.h" 25 26template <class It> 27void 28test(It i, typename std::iterator_traits<It>::difference_type n, 29 typename std::iterator_traits<It>::value_type x) 30{ 31 typedef typename std::iterator_traits<It>::value_type value_type; 32 const std::move_iterator<It> r(i); 33 value_type rr = r[n]; 34 assert(rr == x); 35} 36 37struct do_nothing 38{ 39 void operator()(void*) const {} 40}; 41 42int main() 43{ 44 { 45 char s[] = "1234567890"; 46 test(random_access_iterator<char*>(s+5), 4, '0'); 47 test(s+5, 4, '0'); 48 } 49#if TEST_STD_VER >= 11 50 { 51 int i[5]; 52 typedef std::unique_ptr<int, do_nothing> Ptr; 53 Ptr p[5]; 54 for (unsigned j = 0; j < 5; ++j) 55 p[j].reset(i+j); 56 test(p, 3, Ptr(i+3)); 57 } 58#endif 59#if TEST_STD_VER > 14 60 { 61 constexpr const char *p = "123456789"; 62 typedef std::move_iterator<const char *> MI; 63 constexpr MI it1 = std::make_move_iterator(p); 64 static_assert(it1[0] == '1', ""); 65 static_assert(it1[5] == '6', ""); 66 } 67#endif 68} 69