Re: [QUERY] A "ignorant newbie" question about compiler-writing.

iainf@bristol.st.com (Iain A F Fleming) writes:


> kanze@gabi-soft.fr (J. Kanze) wrote:


> > even Pascal requires some hacks.


> In my recollection, only in parsing (0.1 vs 0..1), though "with"
> clauses can be a bit tricky regarding sematic analysis. (though I may
> be wrong, as I haven't worked on a pascal compiler for about 7 years).


Actually, the specific case I was thinking about was the distinction
between an assignment statement and a procedure call. I actually think
that you could write an LR grammar which would work even if the scanner
returned user symbol in both cases, but it would be complicated. The
usual solution is for the scanner to do a symbol table lookup, and
return a different token if the symbol is defined as a procedure. In
short, a hack.


--
James Kanze +33 (0)1 39 55 85 62 email: kanze@gabi-soft.fr
GABI Software, Sarl., 22 rue Jacques-Lemercier, 78000 Versailles, France
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