builtin-class? ( object -- ? )
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builtin-class

Vocabulary
classes.builtin

Inputs and outputs

object	an object
?	a boolean

Word description
Tests if the object is an instance of the builtin-class class.

Definition

USING: classes kernel words ;

IN: classes.builtin

: builtin-class? ( object -- ? )
    dup class?
    [ "metaclass" word-prop builtin-class eq? ] [ drop f ] if ;