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From: Valentin Bonnard <bonnardv@pratique.fr>
Subject: Re: STL and set_union algorithm question? (newbie to STL!)
Date: 1998/04/18
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To: James Kuyper <kuyper@wizard.net>
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James Kuyper <kuyper@wizard.net> writes:

> If you override mutable_set_iterator::operator*() to return *this, then
> how do you do the following:
> 
> void func(mutable_set_iterator i)
> {
> 	(*i)->member_function();
> }
> 
> You could make this work by defining set<T>::iterator to be a
> mutable_set_iterator derived from T. However, when T is a class type
> such as 'long' or 'MyClass *', you cannot derive from it.

You could define mutable_set_iterator::operator T(). But as 
no conversion will be done for (*i).member and operator. can't 
be overloaded, this isn't very good.

I have never said that it was a good idea to 
create mutable_set_iterator.

-- 

Valentin Bonnard                mailto:bonnardv@pratique.fr
info about C++/a propos du C++: http://pages.pratique.fr/~bonnardv/


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