Re: [boost] Minimizing Dependencies within Generic Classes for Faster and Smaller Programs

Subject: Re: [boost] Minimizing Dependencies within Generic Classes for Faster and Smaller Programs
From: Ion Gaztañaga (igaztanaga_at_[hidden])
Date: 2010-11-13 15:53:51

On 12/11/2010 17:36, Daniel James wrote:
> On 12 November 2010 12:42, vicente.botet<vicente.botet_at_[hidden]>  wrote:
>>
>> The iterator can depend on the Allocator::pointer but this doesn't forcerly means that it depends on the Allocator. If Allocator::pointer  is a typedef to a type idependent of Allocator the independency is ensured.
>>
>> In addition we could make iterator depend on Allocator::void_pointer and use pointer_traits<>::rebind.
>>
>> Am I missing something?
>
> If the node contains a pointer to node, then to work out the type of
> the pointer, you need to know the type of the node. But you can't know
> that until you know the type of the pointer. For example:

In boost we have pointer_to_other to obtain a pointer to a different 
type. This utility partly inspired new C++0x pointer utilities.

Best,

Ion