Re: Parser Operators Feature List in X3 compared with QI

On 2/9/16 5:26 PM, davew wrote:
> Hello,
>
> I have been exploring X3 over the last few weeks and it looks very
> interesting. I have been comparing the features of QI (2.5.3) with those of
> X3 (in development).
>
> One of the questions I have is regarding support for the Parser Operators:
> Sequential Or *(a || b)* and Permutation (*a ^ b)*.
>
> While both are present in QI, I notice that these are currently not present
> in X3 development and wondered what the plans are regarding support for
> these operators in X3 ?
>
> I guess that the rule expression *a >> -b | b* could be used instead of the
> Sequential Or operator. I can't think of an alternative way of
> expressing the Permutation Parser.

One of the goals of X3 is to simplify. There's no plan to support ||.
Permutation? I'm not sure. Maybe I'd welcome it if someone wants to
port it from Qi.

Regards,
-- 
Joel de Guzman
http://www.ciere.com
http://boost-spirit.com
http://www.cycfi.com/


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