[erlang-questions] Dict size in guards
Fri Feb 11 15:35:01 CET 2011
On Thursday, February 10, 2011, Richard O'Keefe wrote:
> Guards cannot and should not call functions.
Is the "should not" because of side-effects in Erlang functions? If Erlang
functions were pure, would you remove the "and should not" from your
statement? I realize there may be issues of performance if they are
allowed, but that would be up to the programmer, I suppose. Does Haskell
permit user-defined (non-monadic) functions in guards?
Just asking from a language theory point of view, since I know you're an
expert in this area. Thanks, ROK.
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