smart-unless ( pred false -- ) (original) (raw)
smart-unless ( pred false -- )
Factor handbook » The language » Combinators » Smart combinators
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Vocabulary
combinators.smart
Inputs
| pred | a quotation |
|---|---|
| false | a quotation |
Outputs
None
Word description
A version of unless that takes two quotations, where the first quotation is a predicate that preserves any inputs it consumes and the second is the false branch.
Definition
: smart-unless ( pred false -- ) [ [ ] ] dip smart-if ; inline