Re: regular expression operators in CF grammars

kgw-news@stiscan.com
20 Jun 2002 21:45:01 -0400

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From: kgw-news@stiscan.com
Newsgroups: comp.compilers
Date: 20 Jun 2002 21:45:01 -0400
Organization: Solution Technology
References: 02-05-142 02-05-151 02-06-024 02-06-044 02-06-054
Keywords: parse
Posted-Date: 20 Jun 2002 21:45:00 EDT

On Mon, 17 Jun 2002 04:12:39 UTC, "Ralph Boland" <rboland@unb.ca>
wrote:

> Meanwhile if there are other regular expression operators that are
> useful for parsing I would be interested in knowing; I will consider
> implementing them.
>

Try looking at the Algol68 meta-productions to see if there
are any other ideas. But I think you have the main ones.
? covers -ETY
^ covers -LIST, -TRAIN etc.
+ covers -SEQUENCE(?)

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