pheap-push ( value prio heap -- newheap )
Persistent heaps

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Vocabulary
persistent.heaps

Inputs

value	an object
prio	a priority
heap	a persistent heap

Outputs

newheap

a new persistent heap

Word description
Creates a new persistent heap also containing the given object of the given priority.

Definition

IN: persistent.heaps

GENERIC: pheap-push ( value prio heap -- newheap )

Methods

USING: accessors kernel math persistent.heaps
persistent.heaps.private ;

M: branch pheap-push
    [ prio>> <= ] 2check [ push-top ] [ push-in ] if ;


USING: kernel persistent.heaps persistent.heaps.private ;

M: empty-heap pheap-push drop <singleton-heap> ;