🚀 go-pugleaf

Two questions about miscellaneous languages:

1.  Regarding the language occam, I have this sample program fragment:

        WHILE TRUE
           SEQ
              PAR
                 south ! x
                 east ? sum
                 temp := a * x
              PAR
                 west ! sum + temp
                 north ? x

    All I really need to know is this:  is the language case-sensitive?  In
    particular, can "PAR" above be also written "Par", "par", etc?

2.  Some languages allow for multiple assignments as part of the same
    statement, where the semantics are that all right-hand sides are
    evaluated before any left-hand sides.  To swap x and y, then, you can
    just write this:

        x = y, y = x

    This is completely deterministic -- it's not the same as saying that
    the two assignments are carried out in parallel.

    Anyway, I've forgotten where I read about this construct (I thought it
    was CSP, but I appear to have been mistaken), and I'd like to give a
    citation for one or more languages that use it.  Obviously, the
    language that originated the construct would be nice, but I'm not that
    picky.   Anybody know what language(s) support this construct?

Thanks,

Scott


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