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| Related articles |
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| problems with identifiers and keywords... micha-1@fantasymail.de (Micha) (2004-10-21) |
| Re: problems with identifiers and keywords... cfc@shell01.TheWorld.com (Chris F Clark) (2004-10-23) |
| Re: problems with identifiers and keywords... gah@ugcs.caltech.edu (glen herrmannsfeldt) (2004-10-24) |
| Re: PL/I parsers, was problems with identifiers and keywords... thvv@multicians.org (2004-11-14) |
| From: | thvv@multicians.org (Tom Van Vleck) |
| Newsgroups: | comp.compilers |
| Date: | 14 Nov 2004 22:44:44 -0500 |
| Organization: | http://groups.google.com |
| References: | 04-10-148 04-10-170 04-10-174 |
| Keywords: | parse, PL/I, history |
| Posted-Date: | 14 Nov 2004 22:44:44 EST |
> [I get the impression that there have only been two parsers written
> for PL/I, the IBM one at Hursley and the Freiboughouse one originally
> for Multics. I dunno how they work. -John]
The first Multics PL/I parser was for the EPL compiler,
done in 1966 or so by Bob Morris in TMG. See
http://www.multicians.org/pl1.html
There were two PL/I compiler generations for Multics after that, the
Version 1 and Version 2 compilers. Freiburghouse led the groups that
did these, but I do not remember whether they used the same parser.
You could ask Bob.
I had the impression, as an occasional user of IBM PL/I F and the IBM
PL/I Checkout compiler that followed it in the early 1970s, that the
parsers for these compilers were different, based on the kind of
errors they discovered.
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