Re: RE-ASSOC: a question about the associativity of RE concatenation

[yyyyyyyyyyyyyyy@xxxxxx]

James Youngman <yyy@xxxxxxx> writes:

    Existing practice is important:
    ...

    However, our goal - or at least one of them - is application
    portability.  For this reason I think that it would be a bad idea to
    decide that some regular expressions can match differently on
    different implementations.  

    That is to say that I would like to be able to write a regexp and be
    confident that it will match a particular input (or not) and its
    subexpressions will fall in a particular way.  

So, you want to fix a way.
One of the most important criteria for this choice is:
what do existing implementations do?
So far nobody has produced such data.

Andries