Re: [boost] safe_dereference()

From: David Abrahams (dave_at_[hidden])
Date: 2002-09-04 14:50:50

From: "Thomas Wenisch" <twenisch_at_[hidden]>

> This is incorrect.  The code returns a *const* reference to the
> temporary.  This extends the life of the temporary to the life of the
> reference.

Yes, but that reference is created within the function. There's another
reference on the outside of the function. By your logic, the temporary
would live forever in this code:

int f();
struct hold { hold(int const& x_) : x(x_) {} int const& x; }
hold* h = new hold(f());

But it doesn't work that way.

-----------------------------------------------------------
           David Abrahams * Boost Consulting
dave_at_[hidden] * http://www.boost-consulting.com