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

USING: kernel ;

IN: combinators.smart

: smart-if ( pred true false -- ) [ preserving ] 2dip if ;
    inline