slovodefinícia
full laziness
(foldoc)
full laziness

A transformation, described by
Wadsworth in 1971, which ensures that subexpressions in a
function body which do not depend on the function's arguments
are only evaluated once. E.g. each time the function

f x = x + sqrt 4

is applied, (sqrt 4) will be evaluated. Since (sqrt 4) does
not depend on x, we could transform this to:

f x = x + sqrt4
sqrt4 = sqrt 4

We have replaced the dynamically created (sqrt 4) with a
single shared constant which, in a graph reduction system,
will be evaluated the first time it is needed and then updated
with its value.

See also fully lazy lambda lifting, let floating.

(1994-11-09)
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