RE: PL/I parsers, was problems with identifiers and keywords...

"Tom Linden" <tom@kednos.com>
14 Nov 2004 22:38:49 -0500

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RE: PL/I parsers, was problems with identifiers and keywords... tom@kednos.com (Tom Linden) (2004-11-14)
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From: "Tom Linden" <tom@kednos.com>
Newsgroups: comp.compilers
Date: 14 Nov 2004 22:38:49 -0500
Organization: Compilers Central
References: 04-10-148 04-10-170 04-10-174 04-11-012
Keywords: PL/I, history
Posted-Date: 14 Nov 2004 22:38:49 EST

The Freiburghouse PL/I for Translation Systems, which formed the basis
of the PL/I compilers for all systems aside from IBM was a new
implementation from the Multics version.


Characterizing IBM PL/I as "more than ANSI" is misleading. That ANSI
definition is actually more rigorous, and unlike IBM did not have ad
hoc extensions. Although we own the VMS version of PL/I which also is
derived from the original Freiburghouse compiler, our UNIX version
actually implements ANSI, IBM (version 2.3) and Digital as separate
dialects. I chose to keep them separate.


>-----Original Message-----
><snip>
>> 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]
>
>There is at least one other parser. ...

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