final/test/utilities/memory/unique.ptr/unique.ptr.single/unique.ptr.single.observers/index.fail.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.
//
//===----------------------------------------------------------------------===//

// <memory>

// unique_ptr

// test op[](size_t)

#include <memory>
#include <cassert>

class A
{
    int state_;
    static int next_;
public:
    A() : state_(++next_) {}
    int get() const {return state_;}

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

    A& operator=(int i) {state_ = i; return *this;}
};

int A::next_ = 0;

int main()
{
    std::unique_ptr<A> p(new A[3]);
    assert(p[0] == 1);
    assert(p[1] == 2);
    assert(p[2] == 3);
    p[0] = 3;
    p[1] = 2;
    p[2] = 1;
    assert(p[0] == 3);
    assert(p[1] == 2);
    assert(p[2] == 1);
}