Re: [boost] Re: Re: Re: rtl (Range Template Library)

From: John Torjo (john.lists_at_[hidden])
Date: 2003-11-20 19:08:49

>>The idea I am pushing for here is that ranges ARE NOT pairs of
>>iterators. Rather, a pair of iterators happens to make a good
>>representation of a range, but may not be the only one.
> 
> 
> I'd like to second this idea, though with a different motivation:
> 
> What about "ranges" that reference a container or another range instead of 

Basically, I see ranges that reference a container as actually refering to 
container.begin() and container.end()

> containing two iterators? Ranges of this kind are also known as "views" 
> and can be quite useful in some situations. The main difference is 

indeed, they're already implemented;)
And yes, they *are* very useful - I'm aleady happily using them.

You do make a strong point for "views" - such ranges should never be reset. In 
other words, they are initialized in their constructor. Afterwards, they cannot 
be changed, just traversed. Right?

> iterator/range invalidation and ownership management, and becomes 
> relevant once you store ranges for using them later on. By requiring that 
> a range is defined by two iterators views would be left out, even though 

I'm not sure I follow...

Best,
John