one pass switch code (was forward references in typedefs)

[dave brown]

In article <18735 at mimsy.UUCP> chris at mimsy.UUCP (Chris Torek) writes:
>Since the code that implements the switch is not generated until after
>all the cases are known, the compiler can select one of the various
>alternatives.  (Incidentally, heap switches are better for sparse
>tables above a moderate number of comparisons.  PCC has used all three
>of these forms---direct, heap, and jump table switches---for years, and
>PCC is a one-pass compiler.)

I understand direct and jump table switches, but what's a heap switch?

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