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minimart-2014
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Fix actor scoping.

This commit is contained in:
Tony Garnock-Jones 2014-06-27 00:15:49 -04:00
parent af3a27c3c3
commit 064d70d602
2 changed files with 118 additions and 79 deletions
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196
minimart/actor.rkt
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@ -24,10 +24,8 @@
(require (for-syntax racket/base))
(require (for-syntax syntax/stx))
(require (for-syntax racket/stxparam))
(require racket/stxparam)
;; (require (for-syntax syntax/parse))
(require racket/splicing)
(require "core.rkt")
(require "gestalt.rkt")
@ -46,7 +44,7 @@
(define-syntax-parameter update-state-struct #f)
(define-syntax-parameter match-state #f)
(define-syntax-parameter compute-gestalt #f)
(define-syntax-parameter update-gestalt #f)
(define-syntax-rule (define-transition head tail ...)
(define head (begin-transition tail ...)))
@ -60,6 +58,17 @@
result)]))
(begin-for-syntax
(define-syntax-rule (define-temporaries [tempvar basestx] ...)
(match-define (list tempvar ...) (generate-temporaries (list basestx ...))))
(define (identifier-append ctxt . pieces)
(and ctxt (datum->syntax ctxt
(string->symbol
(apply string-append
(for/list [(piece pieces)]
(symbol->string (if (syntax? piece) (syntax->datum piece) piece))))))))
(define (analyze-pattern pat-stx)
(syntax-case pat-stx ($ quasiquote unquote quote)
;; Extremely limited support for quasiquoting and quoting
@ -136,9 +145,14 @@
(define gestalt-observers '())
;; (Listof Syntax)
;; Fragments computing gestalt of the actor.
;; Fragments computing gestalt of the actor. Each is in transition context.
;; State bindings and body definitions are in scope.
(define gestalt-computers '())
(define gestalt-updaters '())
;; (Listof Syntax)
;; Fragments used to assemble gestalt of the actor. Each is in expression context.
;; State bindings and body definitions are in scope.
(define gestalt-fragments '())
;; (Listof (Syntax -> Syntax))
;; Sequence of functions generating message-handling clauses for responding to events.
@ -156,6 +170,11 @@
(define-syntax-rule (push! var val) (set! var (cons val var)))
(define-syntax-rule (push-many! var vals ...) (set! var (append vals ... var)))
(define (push-statevar! statevar-stx statetemp-stx stateexp-stx)
(push! statevars statevar-stx)
(push! statetemps statetemp-stx)
(push! body-forms #`(define #,statetemp-stx #,stateexp-stx)))
(define (walk-forms forms-stx)
(syntax-case forms-stx (observe-subscribers
observe-advertisers
@ -176,10 +195,8 @@
(walk-forms #'(rest ...))]
[(#:state [statevar stateexp] rest ...)
(begin (match-define (list statetemp) (generate-temporaries (list #'statevar)))
(push! statevars #'statevar)
(push! statetemps statetemp)
(push-many! body-forms (defbinding #'statevar statetemp #'stateexp))
(begin (define-temporaries [statetemp #'statevar])
(push-statevar! #'statevar statetemp #'stateexp)
(walk-forms #'(rest ...)))]
[((observe-subscribers pat body ...) rest ...)
@ -226,8 +243,7 @@
(walk-forms #'(rest ...)))])]))
(define (defbinding name-stx init-name-stx init-exp)
(list #`(define #,init-name-stx #,init-exp)
#`(define-syntax-parameter #,name-stx (syntax-id-rules () [_ #,init-name-stx]))))
(list #`(define #,init-name-stx #,init-exp)))
(define-syntax-rule (analyze-body* self body-stx struct-type o [keyword accessor fieldname] ...)
(syntax-case body-stx ()
@ -263,26 +279,38 @@
(when (and (not set-name) (or set-exp added-name removed-name))
(define stx (or set-exp added-name removed-name))
(raise-syntax-error #f "#:name is required when using #:set, #:added and/or #:removed" stx))
(match-define (list presence-init set-init projector-name gestalt-name set-temp)
(generate-temporaries (list presence-name set-name pat-stx pat-stx set-name)))
(define base-temp-name (or set-name presence-name))
(define-temporaries
[presence-init presence-name]
[set-init set-name]
[set-temp set-name]
[projector-init base-temp-name]
[gestalt-init base-temp-name])
(define projector-name (identifier-append set-name 'projector: set-name))
(define gestalt-name (identifier-append base-temp-name 'gestalt: base-temp-name))
(define-values (projector-stx gestalt-stx matcher-stx binders) (analyze-pattern pat-stx))
(when presence-name
(push! statevars presence-name)
(push! statetemps presence-init))
(define using-presence? (if presence-name #t #f))
(define using-set? (if (or set-name added-name removed-name) #t #f))
(when set-name
(push! statevars set-name)
(push! statetemps set-init))
(when using-presence?
(push-statevar! presence-name presence-init #'#f))
(when using-set?
(push-statevar! set-name set-init #'(set))
(push-statevar! projector-name projector-init #'#f))
(define gestalt-name-available? (or using-presence? using-set?))
(when gestalt-name-available?
(push-statevar! gestalt-name gestalt-init #'#f))
(push-many! gestalt-observers
(if presence-name
(if using-presence?
(list (lambda (g-stx)
#`(#:update [#,presence-name
(not (gestalt-empty?
(gestalt-filter #,g-stx #,gestalt-name)))])))
'())
(if (or set-name added-name removed-name)
(if using-set?
(list (lambda (g-stx)
#`((define #,set-temp
#,(if set-exp
@ -306,26 +334,30 @@
'())
(list (lambda (g-stx) remaining-stx)))
(push-many! gestalt-computers
(if condition
(list #`(if #,condition #,gestalt-name (gestalt-empty)))
(list gestalt-name)))
(push! body-forms
(push! gestalt-updaters
#`(begin
#,@(if presence-name (defbinding presence-name presence-init #'#f) #'())
#,@(if set-name (defbinding set-name set-init #'(set)) #'())
(define #,projector-name (#,(if pub? #'project-subs #'project-pubs) #,projector-stx
(define #,projector-init (#,(if pub? #'project-subs #'project-pubs) #,projector-stx
#:level #,(or level 0) #:meta-level #,(or meta-level 0)))
(define #,gestalt-name (projection->gestalt #,projector-name)))))
(define #,gestalt-init (projection->gestalt #,projector-init))
#,@(if using-set? #`(#:update [#,projector-name #,projector-init]) #'())
#,@(if gestalt-name-available? #`(#:update [#,gestalt-name #,gestalt-init]) #'())))
(push! gestalt-fragments
(if condition
#`(if #,condition #,(if gestalt-name-available? gestalt-name gestalt-stx) (gestalt-empty))
(if gestalt-name-available? gestalt-name gestalt-stx))))
(define (analyze-participation! pat-stx body-stx pub?)
(define-values (p remaining-stx) (analyze-participator-body body-stx (participator #f #f)))
(match-define (participator condition meta-level) p)
(match-define (list gestalt-name) (generate-temporaries (list pat-stx)))
(define-temporaries [gestalt-name pat-stx])
(define-values (projector-stx gestalt-stx matcher-stx binders) (analyze-pattern pat-stx))
(push! gestalt-computers
(push! gestalt-updaters
#`(define #,gestalt-name (#,(if pub? #'pub #'sub) #,gestalt-stx
#:meta-level #,(or meta-level 0))))
(push! gestalt-fragments
(if condition
#`(if #,condition #,gestalt-name (gestalt-empty))
gestalt-name))
@ -333,23 +365,21 @@
(push! message-handlers
(lambda (e-stx)
#`[(message #,matcher-stx (== #,(or meta-level 0)) #,pub?)
(begin-transition #,@remaining-stx)]))
(push! body-forms
#`(define #,gestalt-name (#,(if pub? #'pub #'sub) #,gestalt-stx
#:meta-level #,(or meta-level 0)))))
(begin-transition #,@remaining-stx)])))
(define (analyze-group-participation! loopspecs-stx pat-stx body-stx pub?)
(define-values (p remaining-stx) (analyze-participator-body body-stx (participator #f #f)))
(match-define (participator condition meta-level) p)
(match-define (list projector-name gestalt-name) (generate-temporaries (list pat-stx pat-stx)))
(define-temporaries
[projector-name pat-stx]
[gestalt-name pat-stx])
(define-values (projector-stx gestalt-stx matcher-stx binders) (analyze-pattern pat-stx))
(unless (stx-null? remaining-stx)
(raise-syntax-error #f
"for/advertise, and for/subscribe cannot install message handlers"
remaining-stx))
(push! gestalt-computers
(push! gestalt-fragments
#`(gestalt-union* (for/list #,loopspecs-stx
#,@(if condition
#`(#:when #,condition)
@ -358,7 +388,7 @@
#:meta-level #,meta-level)))))
(define (push-action! action-stx)
(define temp (car (generate-temporaries (list action-stx))))
(define-temporaries [temp action-stx])
(push! action-ids temp)
(push! body-forms #`(define #,temp #,action-stx)))
@ -366,43 +396,51 @@
(let ((actor-name (or actor-name #'anonymous-actor)))
(define state-struct-name
(datum->syntax actor-name (string->symbol (format "~a-state" (syntax->datum actor-name)))))
(match-define (list e-stx state-stx g-stx compute-gestalt-stx)
(generate-temporaries (list #'event #'state #'gestalt #'compute-gestalt)))
(define-temporaries
[e-stx #'event]
[state-stx #'state]
[g-stx #'gestalt]
[update-gestalt-stx #'update-gestalt])
(define result
#`(let ()
(struct #,state-struct-name (#,@statevars) #:prefab)
#,@(reverse body-forms)
(syntax-parameterize
((update-state-struct (syntax-rules () [(_ v [n e] (... ...))
(struct-copy #,state-struct-name v [n e] (... ...))]))
(match-state (syntax-rules () [(_ id body (... ...))
(match-lambda
[(and id (struct #,state-struct-name (#,@statetemps)))
(syntax-parameterize (#,@(for/list ([sv statevars] [si statetemps])
#`(#,sv (syntax-id-rules () [_ #,si]))))
body (... ...))])])))
(let ((#,compute-gestalt-stx (match-state #,state-stx
(gestalt-union #,@gestalt-computers)))
(#,state-stx (#,state-struct-name #,@statevars)))
(syntax-parameterize
((compute-gestalt (syntax-rules () [(_ state) (#,compute-gestalt-stx state)])))
(spawn #:boot (begin-transition #,@(reverse action-ids))
(procedure-rename
(lambda (#,e-stx #,state-stx)
((match-state #,state-stx
((match #,e-stx
[(routing-update #,g-stx)
(begin-transition
#,@(append-map
(lambda (p) (syntax->list (p g-stx)))
gestalt-observers))]
#,@(map (lambda (p) (p e-stx)) message-handlers)
[_ (lambda (state) #f)])
#,state-stx))
#,state-stx))
'#,actor-name)
#,state-stx
(#,compute-gestalt-stx #,state-stx)))))))
(let ()
#,@(for/list [(sv statevars)] #`(define-syntax-parameter #,sv #f))
(syntax-parameterize
((update-state-struct (syntax-rules () [(_ v [n e] (... ...))
(struct-copy #,state-struct-name v [n e] (... ...))]))
(match-state (syntax-rules () [(_ id body (... ...))
(match-lambda
[(and id (struct #,state-struct-name (#,@statetemps)))
(syntax-parameterize (#,@(for/list ([sv statevars] [si statetemps])
#`(#,sv (syntax-id-rules () [_ #,si]))))
body (... ...))])])))
(splicing-syntax-parameterize
((update-gestalt (syntax-id-rules () [_ #,update-gestalt-stx]))
#,@(for/list ([sv statevars] [si statetemps]) #`(#,sv (syntax-id-rules () [_ #,si]))))
#,@(reverse body-forms)
(define #,update-gestalt-stx
(begin-transition
#,@gestalt-updaters
(routing-update (gestalt-union #,@gestalt-fragments))))
(match (#,update-gestalt-stx (#,state-struct-name #,@statevars))
[(transition #,state-stx initial-gestalt-actions)
(match-define (list (routing-update initial-gestalt)) (clean-actions initial-gestalt-actions))
(spawn #:boot (begin-transition #,@(reverse action-ids))
(procedure-rename
(lambda (#,e-stx #,state-stx)
((match #,e-stx
[(routing-update #,g-stx)
(begin-transition
#,@(append-map
(lambda (p) (syntax->list (p g-stx)))
gestalt-observers))]
#,@(map (lambda (p) (p e-stx)) message-handlers)
[_ (lambda (state) #f)])
#,state-stx))
'#,actor-name)
#,state-stx
initial-gestalt)]))))))
;; (pretty-print `(result ,(syntax->datum result)))
result))
@ -440,8 +478,8 @@
[(#:update-routes rest ...)
#`(match-state state
#,@(reverse final-forms)
(sequence-transitions (transition state (list #,@(reverse action-ids)
(routing-update (compute-gestalt state))))
(sequence-transitions (transition state (list #,@(reverse action-ids)))
update-gestalt
(begin-transition rest ...)))]
[(expr rest ...)
@ -475,7 +513,7 @@
#'(rest ...))])]))
(define (accumulate-action action-stx context-id action-ids final-forms remaining-forms)
(define temp (car (generate-temporaries (list action-stx))))
(define-temporaries [temp action-stx])
(accumulate-actions context-id
(cons temp action-ids)
(cons #`(define #,temp #,action-stx) final-forms)

1
minimart/core.rkt
View File

@ -42,6 +42,7 @@
deliver-event
transition-bind
sequence-transitions
clean-actions
routing-implementation)
;; A PID is a number uniquely identifying a Process within a World.