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smart-if ( pred true false -- )
Factor documentation > Factor handbook > The language > Combinators > Smart combinators
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Vocabulary
combinators.smart

Inputs and outputs
preda quotation
truea quotation
falsea quotation


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 ;
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