Extending REG-EXP to 2-Dimension.

mosh@ramanujan.cs.albany.edu (Mohsin-Ahmed)
Mon, 21 Nov 1994 21:07:06 GMT

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Related articles
Extending REG-EXP to 2-Dimension. mosh@ramanujan.cs.albany.edu (1994-11-21)
Re: Extending REG-EXP to 2-Dimension. steve@cegelecproj.co.uk (1994-11-30)
Re: Extending REG-EXP to 2-Dimension. ruiter@ruls41.fsw.leidenuniv.nl (1994-12-01)
Re: Using inherited attributes within a yacc grammar sikkema@hio.tem.NHL.NL (Albert Sikkema) (1994-12-01)
Re: Extending REG-EXP to 2-Dimension. rockwell@nova.umd.edu (1994-12-03)
Re: Extending REG-EXP to 2-Dimension. lloyd@kauri.vuw.ac.nz (1994-12-05)
Re: Extending REG-EXP to 2-Dimension. pwk@eb.ele.tue.nl (1994-12-05)
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Newsgroups: gnu.emacs.help,comp.emacs,comp.compilers
From: mosh@ramanujan.cs.albany.edu (Mohsin-Ahmed)
Summary: Extending REG-EXP to figures.
Keywords: lex, DFA, question
Organization: Li-67A,IPL,SUNY,Albany,NY,USA.
Date: Mon, 21 Nov 1994 21:07:06 GMT

A lot of text I operate on, has two-dimensional regularity - eg. a box of
comments starting at some column.


However I see that there is no way to specify the connections in a column
across rows, and have rectangle operations on it. This is evident when I
hilit programs in x emacs, where boxed comments are highlited as single
sequence of chars.


Has anyone implemented anything like this? for emacs? Of course, the
regular-expression algorithm would need to re-examine the notion of
'next-char' in the list it is parsing.


Maybe this is related to picture/graph-grammars? Any pointers appreciated.


--
- Mohsin.
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