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From: yahoo_at_[hidden]
Date: 2001-02-26 10:16:10

I was statying out of sync for too long, and a recent cvs checkout
gave me the current itarator adaptor. I was surprized to see that
the template boost::iterator_adaptor<> does not take a traits class
as the last argument, it used to do.
I thought that packing thoses types for ease of use was the whole
point of traits.
A quick search in the CVS Web interface (great tool) tells me that
the switch occured two weeks ago (rev 1.22):
"Removed traits argument from iterator_adaptor<> and switched to explicit trait
specification for maximum ease-of-use."

I'm afraid I do not get the gain in ease of use... (even the docs
seem to acknowledge that seven args is somewhat stretching the limit.)
It is easier for me to have a template iterator_traits_helper<> that
I can fill with Value, Reference, Pointer, Category and Distance (and use the same sensible defaults that iterator_adaptator provides)
when I have types and I want traits, than use traits::value_type, traits::reference, traits::pointer, traits::iterator_category and traits::difference_type
when I ave traits and I want types (like in the current iterator_adaptor incarnation). I 'm still a fan of Iterator Adaptor Library, so thanks for the good work ! BTW, is there any plan for use of the library in View Template Library (another great library to come that will make me throw piles of code :-)?

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