test.pass.cpp revision f5256e16dfc425c1d466f6308d4026d529ce9e0b
1//===----------------------------------------------------------------------===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9 10// <iterator> 11 12// reverse_iterator 13 14// template <RandomAccessIterator Iter1, RandomAccessIterator Iter2> 15// requires HasMinus<Iter2, Iter1> 16// auto operator-(const reverse_iterator<Iter1>& x, const reverse_iterator<Iter2>& y) 17// -> decltype(y.base() - x.base()); 18 19#include <iterator> 20#include <cstddef> 21#include <cassert> 22 23#include "../../../../iterators.h" 24 25template <class It1, class It2> 26void 27test(It1 l, It2 r, std::ptrdiff_t x) 28{ 29 const std::reverse_iterator<It1> r1(l); 30 const std::reverse_iterator<It2> r2(r); 31 assert((r1 - r2) == x); 32} 33 34int main() 35{ 36 char s[3] = {0}; 37 test(random_access_iterator<const char*>(s), random_access_iterator<char*>(s), 0); 38 test(random_access_iterator<char*>(s), random_access_iterator<const char*>(s+1), 1); 39 test(random_access_iterator<const char*>(s+1), random_access_iterator<char*>(s), -1); 40 test(s, s, 0); 41 test(s, s+1, 1); 42 test(s+1, s, -1); 43} 44