[Python-Dev] I18N Toolkit

[Jack Jansen]

> a slightly hairer design issue is what combinations
> of pattern and string the new 're' will handle.
> 
> the first two are obvious:
>  
>      ordinary pattern, ordinary string
>      unicode pattern, unicode string
>  
>  but what about these?
>  
>      ordinary pattern, unicode string
>      unicode pattern, ordinary string

I think the logical thing to do would be to "promote" the ordinary pattern or 
string to unicode, in a similar way to what happens if you combine ints and 
floats in a single expression.

The result may be a bit surprising if your pattern is in ascii and you've 
never been aware of unicode and are given such a string from somewhere else, 
but then if you're only aware of integer arithmetic and are suddenly presented 
with a couple of floats you'll also be pretty surprised at the result. At 
least it's easily explained.
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