Re: [boost] [shared_ptr] Why operator< uses internal_less?

Subject: Re: [boost] [shared_ptr] Why operator< uses internal_less?
From: Sebastian Redl (sebastian.redl_at_[hidden])
Date: 2008-10-09 11:32:41

dariomt_at_[hidden] wrote:
> I see that operator== and operator!= are implemented comparing the pointer
> inside the shared_ptr's using get(), but operator< uses _internal_less, that
> does a different thing.
>
> I thought that operator< would also be implemented using get(), so please,
> can you share the rationale behind the need for _internal_less?
>   
get() returns px (the raw pointer), _internal_less compares pn (the 
shared_count).

This is peculiar, since it means that alias pointers to different 
subobjects would compare non-equal, but sort equivalent. I'd like to 
know the rationale of this, too.

Sebastian