tri ( x p q r -- )
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Vocabulary
kernel

Inputs

x	an object
p	a quotation with stack effect ( x -- ... )
q	a quotation with stack effect ( x -- ... )
r	a quotation with stack effect ( x -- ... )

Outputs
None

Word description
Applies p to x, then applies q to x, and finally applies r to x.

Examples
If [ p ], [ q ] and [ r ] have stack effect ( x -- ), then the following two lines are equivalent:

[ p ] [ q ] [ r ] tri dup p dup q r

If [ p ], [ q ] and [ r ] have stack effect ( x -- y ), then the following two lines are equivalent:

[ p ] [ q ] [ r ] tri dup p over q rot r

In general, the following two lines are equivalent:

[ p ] [ q ] [ r ] tri [ p ] keep [ q ] keep r

See also
bi, cleave

Definition

IN: kernel

: tri ( x p q r -- ) [ [ keep ] dip keep ] dip call ; inline