Re: [Boost-users] Casting this pointer to a number

From: Zeljko Vrba (zvrba_at_[hidden])
Date: 2008-01-13 10:04:36

On Sun, Jan 13, 2008 at 08:40:51AM -0600, sj_at_[hidden] wrote:
> 
> I'd like to provide a function with an unique identifier:
>
Why?  What is it going to do with the ID?  Why not make the ID a void* pointer?
And what semantics does this "unique identification" have?  Once an object is
deleted, another new'd object may get its address; I can hardly qualify that
as "unique ID".

> 
> I guess another question is: should I bother replacing this old-style  
> cast, maybe there is a better way to approach this situation in general?
> 
reinterpret_cast.  although, that's long and painful to type at every function
invocation (so is the old-style cast), so I'd redefine f() as

void f(void *pv)
{
  size_t uid = reinterpret_cast<size_t>(pv);
  ...
}