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Re: Maintaining scope while parsing C with a YACC grammar

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eliben <eliben@gmail.com> writes:

> [There's a couple of possibilities.  One is to add separate rules for
> the open and close braces with action code that increments and
> decrements the nesting level, so you know when you reduce the
> declaration what scope it is in.  Another is to parse the whole thing
> into an AST without trying to interpret the symbols other than making
> pointers to a generic symbol table entry per name, then walk the AST
> and add the scope and type info.  Perhaps people will have other
> suggestions. -John]

I strongly recommend the "build a tree" solution.  It might seem like
a lot of trouble at first, but it will simplify things in the long
run.

Do all the interesting work during a subsequent walk of the tree.  Or
multiple walks.

I'd do the "making pointers to a generic symbol table..." part during
the tree walk, too, except that C requires some sort of kludgery to
deal with typedefs.

- Bob
[The point of the generic symbol table stuff is that you have to remember the
names somehow, and that seems less awful than doing a strdup() for each
name and hanging the strings off the AST. -John]

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Maintaining scope while parsing C with a YACC grammar eliben <eliben@gmail.com> - 2011-04-25 05:14 -0700
  Re: Maintaining scope while parsing C with a YACC grammar Robert A Duff <bobduff@shell01.TheWorld.com> - 2011-04-26 12:22 -0400
    Re: Maintaining scope while parsing C with a YACC grammar Robert A Duff <bobduff@shell01.TheWorld.com> - 2011-04-26 14:08 -0400
    Re: Maintaining scope while parsing C with a YACC grammar eliben <eliben@gmail.com> - 2011-04-28 23:20 -0700
      Re: Maintaining scope while parsing C with a YACC grammar Robert A Duff <bobduff@shell01.TheWorld.com> - 2011-05-02 20:19 -0400
        Re: Maintaining scope while parsing C with a YACC grammar "Ira Baxter" <idbaxter@semdesigns.com> - 2011-05-13 17:46 -0500
        Maintaining scope while parsing C with a Yacc grammar Chris F Clark <cfc@shell01.TheWorld.com> - 2011-06-12 20:43 -0400
      Re: Maintaining scope while parsing C with a YACC grammar torbenm@diku.dk (Torben Ægidius Mogensen) - 2011-05-03 09:51 +0200
  Re: Maintaining scope while parsing C with a YACC grammar Paul B Mann <paul@paulbmann.com> - 2011-05-06 10:43 -0700

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