libcxx/test/std/iterators/predef.iterators/reverse.iterators/reverse.iter.ops/reverse.iter.op.star/op_star.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     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>

// reverse_iterator

// reference operator*() const;

// Be sure to respect LWG 198:
//    http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#198
// LWG 198 was superseded by LWG 2360
//    http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#2360

#include <iterator>
#include <cassert>

class A
{
    int data_;
public:
    A() : data_(1) {}
    ~A() {data_ = -1;}

    friend bool operator==(const A& x, const A& y)
        {return x.data_ == y.data_;}
};

template <class It>
void
test(It i, typename std::iterator_traits<It>::value_type x)
{
    std::reverse_iterator<It> r(i);
    assert(*r == x);
}

int main()
{
    A a;
    test(&a+1, A());
}