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Two functions for everything?
From: DCP@QUABBIN.SCRC.Symbolics.COM (David C. Plummer)
This is bogus folks. All you need is two entrypoints: one which doesn't
check anything, and one which checks what it needs to. They then join.
Safety 0 (at compile time) causes functions to call the the
don't-check-anything entrypoint, and safety > 0 causes functions to call
the one that checks. Hell, you could have a different entrypoint for
each setting of safety.
Yeah, but where in CLtL do we provide a way to make functions with multiple
entry points? I certainly don't want to have to hand-code every single
function that does optional error checking in assembly language (or
whatever). The point I was trying to make was that, if we are serious
about making multiple levels of error checking part of the language, we
should also provide some high-level constructs for specifying what error
checking goes on when. Multiple entry points would be one way to implement
such a construct....