Re: updating the Crenshaw tutorial

Hi, John. Someone sent me email to say that there'd been some talk on
the newsgroup of completing my still-unfinished tutorial on compiler
construction. I didn't see the thread, though.


For the record, I've been talking with others about re-doing the
series using modern tools like Delphi to give a GUI interface. If
anyone is interested in seeing such a thing, I'd be interested in
talking about it.


Also for the record, I pretty well had the missing chapters mapped out
in my head. There were only two major items I never got around to
discussing. The first was dealing with multiple types (not
user-defined -- had no plans to go there). I wanted to take a
different approach to type-casting, which is to consider the type of
the DESTINATION parameter, as well as the arguments.


The second was optimization. I had two levels in mind. The first was
to implement a small, internal stack in data registers, so for
operations that didn't need many levels, one got register-register
operations. The next was to add optimization of the parse tree, to
remove run-time computation of constant expressions and also to
minimize stack depth.


Jack Crenshaw

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