Some answers to some questions below:
- the (/ /) substitute for [ ] was the only available substitute in the
original Stanford compiler (which, BTW, is the Pascal P4 of Niklaus Wirth).
I added (. .), because this was present in my sources. Same goes for ->,
Stanford supported @ only (IIRC).
- the N+ option for nesting comments was already present in the Stanford
compiler,
but IIRC, it worked only for { } comments. I added the /* ... */
comments - which could
be dropped again, if you don't like it - and the support for nesting the
other comment types.
My existing Pascal sources ran successfully on PASCAL/VS (IBM mainframe
compiler)
in the 90s, so my goal was to extend the Stanford compiler in such a way
that I don't
have to change my PASCAL/VS sources (much).
Kind regards
Bernd
Am 24.07.2013 10:02, schrieb Jonas Maebe:
There are some minor problems I faced when compiling the Stanford Pascal
sources with FPC:
- Stanford Pascal (my version) allows (. .) and (/ /) as substitutes for [ ]
FPC also supports (. and .). It doesn't support (/ and /) though. Support for
that could maybe be added under a new syntax mode or mode switch switch, but is
this a common syntax? I've never heard of that one before.
- and -> for the pointer symbol (like VS/PASCAL)
Adding support for that under a syntax mode or mode switch switch should be no
problem.
- and different styles of comments:
{ }
(* ... *)
/* ... */
and - strange to me, but it's in the compiler source: "this is a comment, too"
FPC supports the first two styles. Maybe the rest could be added, but that
seems very un-Pascallish.
Comments of different types can be nested;
comments of the same type can be nested, if the compiler option N+ is set.
FPC supports nesting of {} comments. (* *) comments do not nest, and { }
comments appearing inside (* *) comments are ignored (they don't start a new
nesting level). Supporting four nestable comment would require quite a few
changes and I'm not sure whether this would be nice. Are these also extensions
that you added yourself?
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