Re: [boost] [BGL] why not breakup put_get_helper into three structs?

From: Andrew Sutton (asutton_at_[hidden])
Date: 2008-08-08 08:27:06

>> The concepts don't really change either. There can still
>> a read, write, and lvalue concepts. They just appear as:
>>
>> m(k) 	// read
>> m(k, x) 	// write
>> m(k) = x 	// lvalue
>
> Personally I don't think there should be an lvalue concept.  Is there
> really an algorithm that requires it?

I was actually wondering the same thing as I wrote that. I don't  
think there are any algorithms that use it, and I can't think of any  
use cases where lvalue access is required beyond the usual get/put  
operations. Maybe the lvalue concept can go away until somebody comes  
up with a really good use for it.

> OK, but that's certainly not "property maps continue to exist in the
> same form...."  Ugh, now that I copied your words out, I realize you
> said "the same" and not "some," which changes everything.  Sorry  
> for the
> noise.

My original phrasing was poorly worded. I can certainly see where it  
seems like I don't like property maps.

Andrew Sutton
asutton_at_[hidden]