[C++-sig] Re: My latest project

Neal D. Becker ndbecker2 at verizon.net
Mon Aug 16 18:33:18 CEST 2004

>>> I have only 2 quick comments in this one:
>>> 1. You should never use std::[binary|unary]_function because it
>>>    suppresses EBO.  Consider what happens when you have a
>>>    compressed_pair<minus<int>,plus<int> >.
>> OK.  I assume this means "Empty Base Optimization?"
> Yep.

Why is this important?  Is this comment just made as a general principle, or
does it relate to the actual use in the vector arithmetic I wrote?  I
assume the only signficance of EBO is a size issue, in which case it
wouldn't matter in the way I used it for vector arithmetic.  Or, is there
something I'm missing?  (I went ahead and made the change you suggested
anyway, but I'm curious).

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