🚀 go-pugleaf

In article <6081@bd.sei.cmu.edu> firth@sei.cmu.edu (Robert Firth) writes:
>
>Example:
>
>	munge(1/x)
>
>greedy evaluation will evaluate 1/x and then call munge().  lazy
>evaluation will call munge(), and evaluate 1/x only when the body
>of munge referenced its formal parameter.
>
>As the example shows, lazy evaluation "works" in cases where greedy
>evaluation does not - in this case, if x=0 but munge doesn't reference
>its parameter.

Lazy Evaluation differs fromn call-by-name in that the expression is
evaluated at-most-once. If there are multiple refrences to 1/x, in the above
example, only one of them will be evaluated if needed.