(guile.info.gz) Delayed Evaluation
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28.5 Delayed Evaluation
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[delay]
-- Scheme Procedure: promise? obj
-- C Function: scm_promise_p (obj)
Return true if OBJ is a promise, i.e. a delayed computation (
Delayed evaluation (r5rs.info)Delayed evaluation.).
-- Scheme Procedure: force x
-- C Function: scm_force (x)
If the promise X has not been computed yet, compute and return X,
otherwise just return the previously computed value.
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