identity-hashcode ( obj -- code )
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hashcode* ( depth obj -- code )

Vocabulary
kernel

Inputs

obj

an object

Outputs

code

a fixnum

Word description
Outputs the identity hashcode of an object. The identity hashcode is not guaranteed to be unique, however it will not change during the object's lifetime.

See also
hashcode, hashcode*

Definition

USING: kernel.private ;

IN: kernel

: identity-hashcode ( obj -- code )
    dup tag 0 eq? [
        dup tag 1 eq?
        [ drop 0 ] [
            dup (identity-hashcode) dup 0 eq? [
                drop dup compute-identity-hashcode
                (identity-hashcode)
            ] [ nip ] if
        ] if
    ] unless ; inline