Pascal yacc (was: Why LL(1) Parsers do not support left recursion?)

Hans-Peter Diettrich schrieb:


> A few months ago none of the free tools was in a really usable state. I
> just looked again, and found none but the well known tply, dyacclex and
> dcg, whose development has been abandoned many years ago.
>
> Did I miss something?


> [I see something called pyacc that comes with Debian. -John]


IMO pyacc is a (early or later?) version of tply, which also is part of
the fpc distribution.


Perhaps a common problem of these tools is their incompatibility with
newer yacc (grammar) versions, and there might exist problems in
removing the C code from "original" yacc grammars.


Can somebody give me hints about required or recommended procedures, to
remove version and language specific parts from yacc grammars?


DoDi

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