[R6RS] Predicate for "neither infinite nor NaN"

dyb at cs.indiana.edu dyb at cs.indiana.edu
Tue Mar 28 19:17:36 EST 2006


> The specification of arithmetic in a number of places refers to
> numbers that can be anything except infinite or NaN.  Should we have a
> predicate for this?  (Jaffer's SRFI has `finite?' for this purpose, I
> believe.)

Such a predicate might be nice.  The name finite? is okay with me.  We
already have a nan? predicate, right?  Will we also have an infinite? 
predicate, so that the predicates finite?, infinite?, and nan? are
orthogonal and cover the space of all real numbers?

Kent



More information about the R6RS mailing list