Re: PL/MIX

Roberto Waltman <usenet@rwaltman.net> writes:


> Indeed. Adding "structured programming" control structures to a
> language is a simple exercise that has been repeated many times, using
> macros, (for assemblers with adequate macro facilities,) or with
> simple preprocessors for either assembly or higher level languages.


Since it is an exercise, is there perhaps a concise statement of that
exercise as an explicit exercise in some programming text? Preferably
something like, "Take the fake assembly language we defined in section
2 and enhance it with 'structured programming' control structures. For
example, add the following constructions and capabilities: ... "?


Thanks to the moderator's reply, I've located websites with
documentation on PL360, PL/M and LIL. In principle, by reading these
documents, I can find out what they have in common and infer what I
would want to do with Knuth's MIX. But that is a lot of work just to
obtain a precise definition. A statement of the exercise as an
explicit exercise would make that work unneccessary.
--
Ignorantly,
Allan Adler <ara@zurich.csail.mit.edu>
[I think if you ask three people what structured programming is,
you'll get three different answers. There's probably general
agreement that if/then/else and while loops are OK, but it fuzzes out
a lot from there. -John]

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