pop-d ( -- obj )
Stack effect inference implementation

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Vocabulary
stack-checker.backend

Inputs
None

Outputs

obj

object

Word description
Pops an item from the compile time datastack. If the datastack is empty, a new value is instead introduced.

See also
introduce-values

Definition

USING: arrays kernel sequences stack-checker.state
stack-checker.values ;

IN: stack-checker.backend

: pop-d ( -- obj )
    meta-d
    [ <value> dup 1array introduce-values ]
    [ pop meta-d length update-inner-d ] if-empty ;