APL - Distinguish primitive and defined functions inside an operator of

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Distinguish primitive and defined functions inside an operator of

Thomas Buchholz

2005-01-11, 3:55 pm

I wonder if there is a way in IBM APL2 for Windows to distinguish inside
a defined operator whether or not the operator was called with some
primitive function.

Since there is actually no fill function implemeted for the Each
operator I would like to mimic it using some defined operator E{<-}L(F
EACH)R. In the monadic case the result of EACH on an empty R would
therefore be E{<-}({rho}R){rho}{enclose}F{first}R if F is a primitive
function and E{<-}R if F is a defined one. (BTW: does the Mainframe
version really behave in that manner?)

Any ideas would be gratefully appreciated.

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