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From: David Abrahams (dave_at_[hidden])
Date: 2006-05-09 10:01:25

Thorsten Ottosen <thorsten.ottosen_at_[hidden]> writes:

> David Abrahams wrote:
>> Thorsten Ottosen <thorsten.ottosen_at_[hidden]> writes:
>>>The new version will feature special functions for generating ranges for
>>>the string library. We could probably wrap char* iterators in
>>>boost::string_iterator<char>. Are you sure we need the end iterator to
>>>be a different type?
>> No, you don't, in fact. Comparisons just get a little more expensive
>> than they'd need to be otherwise.
> You mean more expensive because you have to see which irerator that is
> the valid one?

The checks are more complicated than that, but that's the general

> In that case it might be reasoable to always mandate the left argument
> to be the valid iterator:

No, that violates EqualityComparable, not to mention every reasonable
person's expectations.

Dave Abrahams
Boost Consulting

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