Re: LR(1) Parsing : Error Handling & Recovery

In article 14-07-032,
Our Esteemed Moderator wrote:
>[The practical problem is that RD parsers are typically written by
>hand, and after a couple of tweaks to the grammar and what are
>supposed to be matching tweaks to the code, they can get out of sync.
>Also, error checking code is boring and one's eyes tend to glaze. An
>RD parser mechanically generated from the grammar should reflect the
>grammar as accurately as any other mechanically generated parser.
>-John]


A long time ago, in a galaxy far, far away, the guys at the Georgia
Institute of Technology School of Information and Computer Science wrote
STACC (STill Another Compiler Compiler) which was yacc-like but generated
a recursive descent parser written in their enhanced version of RATFOR.


Sometime in the 1984-1985 time frame I translated it into K&R C.
I have it, but it was last touched in 1993. (Probably the modified
dates are from when I copied it around; I suspect it's been even
longer since I looked at the code. The README lists a date of
February 1985!)


I could probably put it up on github, if anyone's interested.
--
Aharon (Arnold) Robbins arnold AT skeeve DOT com
P.O. Box 354 Home Phone: +972 8 979-0381
Nof Ayalon
D.N. Shimshon 9978500 ISRAEL

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