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// template <InputIterator Iter> 13// Iter next(Iter x, Iter::difference_type n = 1); 14 15// LWG #2353 relaxed the requirement on next from ForwardIterator to InputIterator 16 17#include <iterator> 18#include <cassert> 19 20#include "test_iterators.h" 21 22template <class It> 23void 24test(It i, typename std::iterator_traits<It>::difference_type n, It x) 25{ 26 assert(std::next(i, n) == x); 27} 28 29template <class It> 30void 31test(It i, It x) 32{ 33 assert(std::next(i) == x); 34} 35 36int main() 37{ 38 const char* s = "1234567890"; 39 test(input_iterator<const char*>(s), 10, input_iterator<const char*>(s+10)); 40 test(forward_iterator<const char*>(s), 10, forward_iterator<const char*>(s+10)); 41 test(bidirectional_iterator<const char*>(s), 10, bidirectional_iterator<const char*>(s+10)); 42 test(random_access_iterator<const char*>(s), 10, random_access_iterator<const char*>(s+10)); 43 test(s, 10, s+10); 44 45 test(input_iterator<const char*>(s), input_iterator<const char*>(s+1)); 46 test(forward_iterator<const char*>(s), forward_iterator<const char*>(s+1)); 47 test(bidirectional_iterator<const char*>(s), bidirectional_iterator<const char*>(s+1)); 48 test(random_access_iterator<const char*>(s), random_access_iterator<const char*>(s+1)); 49 test(s, s+1); 50} 51