track-set.rkt
This commit is contained in:
parent
cf82b794e5
commit
a466fcdf23
|
@ -0,0 +1,76 @@
|
|||
#lang syndicate/actor
|
||||
|
||||
(require racket/set)
|
||||
|
||||
(define-syntax-rule (track-set field-name P expr)
|
||||
(let ()
|
||||
(field [field-name (set)])
|
||||
(on (asserted P) (field-name (set-add (field-name) expr)))
|
||||
(on (retracted P) (field-name (set-remove (field-name) expr)))
|
||||
field-name))
|
||||
|
||||
(define-syntax-rule (track-hash field-name P key-expr value-expr)
|
||||
(let ()
|
||||
(field [field-name (hash)])
|
||||
(on (asserted P)
|
||||
(let ((key key-expr))
|
||||
(when (hash-has-key? (field-name) key)
|
||||
(log-warning "track-hash: ~a: overwriting existing entry ~v"
|
||||
'field-name
|
||||
key))
|
||||
(field-name (hash-set (field-name) key value-expr))))
|
||||
(on (retracted P) (field-name (hash-remove (field-name) key-expr)))
|
||||
field-name))
|
||||
|
||||
(define-syntax-rule (track-hash-set field-name P key-expr value-expr)
|
||||
(let ()
|
||||
(field [field-name (hash)])
|
||||
(on (asserted P)
|
||||
(let ((key key-expr))
|
||||
(field-name (hash-set (field-name)
|
||||
key
|
||||
(set-add (hash-ref (field-name) key set)
|
||||
value-expr)))))
|
||||
(on (retracted P)
|
||||
(let ((key key-expr))
|
||||
(let ((new-entries (set-remove (hash-ref (field-name) key set)
|
||||
value-expr)))
|
||||
(field-name (if (set-empty? new-entries)
|
||||
(hash-remove (field-name) key)
|
||||
(hash-set (field-name) key new-entries))))))
|
||||
field-name))
|
||||
|
||||
(actor #:name 'tracker
|
||||
(forever
|
||||
(define as-set (track-set as-set `(item ,$a ,$b) (list a b)))
|
||||
(define as-hash (track-hash as-hash `(item ,$a ,$b) a b))
|
||||
(define as-hash-set (track-hash-set as-hash-set `(item ,$a ,$b) a b))
|
||||
|
||||
(on (message 'dump)
|
||||
(printf "----------------------------------------\n")
|
||||
(printf "Tracked as-set:\n")
|
||||
(for [(item (as-set))]
|
||||
(match-define (list a b) item)
|
||||
(printf " ~v -> ~v\n" a b))
|
||||
(newline)
|
||||
(printf "Tracked as-hash:\n")
|
||||
(for [((k v) (in-hash (as-hash)))]
|
||||
(printf " ~v -> ~v\n" k v))
|
||||
(newline)
|
||||
(printf "Tracked as-hash-set:\n")
|
||||
(for [((k vs) (in-hash (as-hash-set)))]
|
||||
(printf " ~v -> ~v\n" k vs))
|
||||
(printf "----------------------------------------\n")
|
||||
(flush-output))))
|
||||
|
||||
(actor #:name 'mutator
|
||||
(assert! `(item a 1))
|
||||
(assert! `(item b 2))
|
||||
(assert! `(item b 3))
|
||||
(send! 'dump)
|
||||
(retract! `(item b ,?))
|
||||
(send! 'dump)
|
||||
(assert! `(item c 1))
|
||||
(assert! `(item c 4))
|
||||
(send! 'dump)
|
||||
(forever))
|
Loading…
Reference in New Issue