On Thu, 10 Feb 2011 21:19:49 +0000 "Phil Endecott" <spam_from_boost_dev@chezphil.org> wrote:
[...] So I have one comment on this exchange:
Iterating through code points is fully generic and should work for any forward iterator or bidirectional iterator, not just a pointer.
I could make it fully generic, but it wouldn't be nearly as efficient that way. I chose to do the extra work to make it efficient.
I have to challenge your efficiency comment. I have UTF-8 encoding and decoding that works with generic iterators, including pointers, and I have no efficiency issues resulting from its genericity. In fact I spent some time carefully optimising it and I believe that when used with pointers it is as good as I could get by writing it in assembler.
You may well be right, for your UTF-8-only code. For my design, it was more efficient to create separate iterators for UTF-8, UTF-16, and UTF-32 than to try to make one completely generic UTF-anything iterator. That's what I meant by "fully generic." -- Chad Nelson Oak Circle Software, Inc. * * *