smart-if ( pred true false -- ) (original) (raw)
smart-if ( pred true false -- )
Factor handbook » The language » Combinators » Smart combinators
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Vocabulary
combinators.smart
Inputs
| pred | a quotation |
|---|---|
| true | a quotation |
| false | a quotation |
Outputs
None
Word description
A version of if that takes three quotations, where the first quotation is a predicate that preserves any inputs it consumes.
Definition
: smart-if ( pred true false -- ) [ preserving ] 2dip if ;
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