tag ( object -- n ) (original) (raw)
tag ( object -- n )
Factor handbook » The implementation » VM memory layouts » Type numbers
| Next: | type>class ( n -- class ) |
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Inputs
| object | an object |
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Outputs
| n | a tag number |
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Word description
Outputs an object's tag number, between zero and one less than num-types. This is implementation detail and user code should call class-of instead.
Definition
PRIMITIVE: tag ( object -- n ) foldable flushable