?1when ( ..a x pred: ( ..a x quot: ( ..a x -- ..b ? ) -- ..b x ? ) true: ( ..b x -- ..c ) -- ..c )


Vocabulary
combinators.extras

Inputs
xan object
preda quotation with stack effect ( ..a x quot: ( ..a x -- ..b ? ) -- ..b x ? )
truea quotation with stack effect ( ..b x -- ..c )


Outputs
None

Definition

: ?1when
( ..a x pred: ( ..a x quot: ( ..a x -- ..b ? ) -- ..b x ? ) true: ( ..b x -- ..c ) -- ..c )
[ ] ?1if ; inline