Split out pattern.rkt
This commit is contained in:
Tony Garnock-Jones
parent
2a218dd0a6
commit
d161d50b9a
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@ -26,19 +26,13 @@
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(struct-out actor-state)
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pretty-print-actor-state
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(for-syntax analyze-pattern)
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syndicate-actor-prompt-tag-installed?
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(struct-out predicate-match)
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match-value/captures
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syndicate-effects-available?
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)
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(require (for-syntax racket/base))
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(require (for-syntax racket/sequence))
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(require "support/dsl.rkt")
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(require "support/struct.rkt")
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(require "pretty.rkt")
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(require "treap.rkt")
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(require "effect.rkt")
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(define&provide-dsl-helper-syntaxes "state/until/forever form"
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@ -60,6 +54,7 @@
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(require (for-syntax racket/list))
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(require (for-syntax syntax/parse))
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(require (for-syntax syntax/stx))
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(require "pattern.rkt")
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(require racket/set)
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(require racket/match)
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@ -186,7 +181,7 @@
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(define syndicate-tag (make-effect-tag 'syndicate))
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(define (syndicate-actor-prompt-tag-installed?)
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(define (syndicate-effects-available?)
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(effect-available? syndicate-tag))
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(define do! (perform syndicate-tag))
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@ -226,62 +221,6 @@
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(define (spawn! linkage-kind action-fn)
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(do! (spawn-instruction linkage-kind action-fn)))
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(begin-for-syntax
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(define-splicing-syntax-class name
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(pattern (~seq #:name N))
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(pattern (~seq) #:attr N #'#f))
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(define-splicing-syntax-class init
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(pattern (~seq #:init [I ...]))
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(pattern (~seq) #:attr [I 1] '()))
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(define-splicing-syntax-class done
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(pattern (~seq #:done [I ...]))
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(pattern (~seq) #:attr [I 1] '()))
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(define-splicing-syntax-class bindings
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(pattern (~seq #:collect [(id init) ...]))
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(pattern (~seq) #:attr [id 1] '() #:attr [init 1] '())))
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;; Syntax for spawning a 'call-linked actor.
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(define-syntax (state stx)
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(syntax-parse stx
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[(_ init:init [bs:bindings O ...] [E Oe ...] ...)
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(expand-state #'#f 'call #'(init.I ...) #'(bs.id ...) #'(bs.init ...) #'(O ...) #'([E Oe ...] ...))]))
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;; Sugar
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(define-syntax (until stx)
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(syntax-parse stx
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[(_ E init:init done:done bs:bindings O ...)
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#'(state #:init [init.I ...] [#:collect [(bs.id bs.init) ...] O ...] [E done.I ... (values)])]))
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;; Sugar
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(define-syntax (forever stx)
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(syntax-parse stx
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[(_ init:init bs:bindings O ...)
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#'(state #:init [init.I ...] [#:collect [(bs.id bs.init) ...] O ...])]))
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;; Spawn actors with 'actor linkage
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(define-syntax (actor stx)
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(syntax-parse stx
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[(_ name:name I ...)
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(expand-state #'name.N 'actor #'(I ... (return/no-link-result!)) #'() #'() #'() #'())]))
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;; Spawn whole dataspaces
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(define-syntax (dataspace stx)
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(syntax-parse stx
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[(_ I ...)
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(expand-state #'#f
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'dataspace
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#'(I
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...
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(perform-core-action! (quit-dataspace))
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(return/no-link-result!))
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#'()
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#'()
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#'()
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#'())]))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Main behavior of HLL actors
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@ -454,14 +393,70 @@
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;; TODO: some better means of keeping track of nested dataspace levels
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(begin-for-syntax
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(define-splicing-syntax-class name
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(pattern (~seq #:name N))
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(pattern (~seq) #:attr N #'#f))
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(define-splicing-syntax-class init
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(pattern (~seq #:init [I ...]))
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(pattern (~seq) #:attr [I 1] '()))
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(define-splicing-syntax-class done
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(pattern (~seq #:done [I ...]))
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(pattern (~seq) #:attr [I 1] '()))
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(define-splicing-syntax-class bindings
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(pattern (~seq #:collect [(id init) ...]))
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(pattern (~seq) #:attr [id 1] '() #:attr [init 1] '()))
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(define-splicing-syntax-class when-pred
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(pattern (~seq #:when Pred))
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(pattern (~seq) #:attr Pred #'#t))
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(define-splicing-syntax-class meta-level
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(pattern (~seq #:meta-level level:integer))
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(pattern (~seq) #:attr level #'0))
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(pattern (~seq) #:attr level #'0)))
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;; Syntax for spawning a 'call-linked actor.
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(define-syntax (state stx)
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(syntax-parse stx
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[(_ init:init [bs:bindings O ...] [E Oe ...] ...)
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(expand-state #'#f 'call #'(init.I ...) #'(bs.id ...) #'(bs.init ...) #'(O ...) #'([E Oe ...] ...))]))
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;; Sugar
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(define-syntax (until stx)
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(syntax-parse stx
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[(_ E init:init done:done bs:bindings O ...)
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#'(state #:init [init.I ...] [#:collect [(bs.id bs.init) ...] O ...] [E done.I ... (values)])]))
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;; Sugar
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(define-syntax (forever stx)
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(syntax-parse stx
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[(_ init:init bs:bindings O ...)
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#'(state #:init [init.I ...] [#:collect [(bs.id bs.init) ...] O ...])]))
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;; Spawn actors with 'actor linkage
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(define-syntax (actor stx)
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(syntax-parse stx
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[(_ name:name I ...)
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(expand-state #'name.N 'actor #'(I ... (return/no-link-result!)) #'() #'() #'() #'())]))
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;; Spawn whole dataspaces
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(define-syntax (dataspace stx)
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(syntax-parse stx
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[(_ I ...)
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(expand-state #'#f
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'dataspace
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#'(I
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...
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(perform-core-action! (quit-dataspace))
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(return/no-link-result!))
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#'()
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#'()
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#'()
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#'())]))
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(begin-for-syntax
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(define (expand-state name-exp linkage-kind init-actions binding-names binding-inits ongoings edges)
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;; ----------------------------------------
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(define binding-count (length (syntax->list binding-names)))
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@ -764,7 +759,7 @@
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;; (pretty-print (syntax->datum action-fn-stx))
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#`(let ((do-spawn (lambda () (spawn! '#,linkage-kind #,action-fn-stx))))
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(if (syndicate-actor-prompt-tag-installed?)
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(if (syndicate-effects-available?)
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(do-spawn)
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(actor-body->spawn-action do-spawn))))
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)
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@ -814,140 +809,6 @@
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;; (reverse currs-rev)
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;; (reverse nexts-rev)))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; HLL pattern analysis
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(begin-for-syntax
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(define (dollar-id? stx)
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(and (identifier? stx)
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(char=? (string-ref (symbol->string (syntax-e stx)) 0) #\$)))
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(define (undollar stx)
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(and (dollar-id? stx)
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(datum->syntax stx (string->symbol (substring (symbol->string (syntax-e stx)) 1)))))
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;; Syntax -> (Values Projection AssertionSetPattern (ListOf Identifier) Syntax)
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(define (analyze-pattern outer-expr-stx pat-stx0)
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(let walk ((pat-stx pat-stx0))
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(syntax-case pat-stx ($ ? quasiquote unquote quote)
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;; Extremely limited support for quasiquoting and quoting
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[(quasiquote (unquote p)) (walk #'p)]
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[(quasiquote (p ...)) (walk #'(list (quasiquote p) ...))]
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[(quasiquote p) (values #''p #''p '() #''p)]
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[(quote p) (values #''p #''p '() #''p)]
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[$v
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(dollar-id? #'$v)
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(with-syntax [(v (undollar #'$v))]
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(values #'(?!)
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#'?
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(list #'v)
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#'v))]
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[($ v p)
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(let ()
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(define-values (pr g bs _ins) (walk #'p))
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(when (not (null? bs))
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(raise-syntax-error #f "nested bindings not supported" outer-expr-stx pat-stx))
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(values #`(?! #,pr)
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g
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(list #'v)
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#'v))]
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[(? pred? p)
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;; TODO: support pred? in asserted/retracted as well as message events
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(let ()
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(syntax-parse outer-expr-stx
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#:literals [message]
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[(message _ ...) 'ok]
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[_ (raise-syntax-error #f
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"Predicate '?' matching only supported in message events"
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outer-expr-stx
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pat-stx)])
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(define-values (pr g bs ins) (walk #'p))
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(values #`(predicate-match pred? #,pr)
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g
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bs
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ins))]
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[(ctor p ...)
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(let ()
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(define parts (if (identifier? #'ctor) #'(p ...) #'(ctor p ...)))
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(define-values (pr g bs ins)
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(for/fold [(pr '()) (g '()) (bs '()) (ins '())] [(p (syntax->list parts))]
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(define-values (pr1 g1 bs1 ins1) (walk p))
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(values (cons pr1 pr)
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(cons g1 g)
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(append bs bs1)
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(cons ins1 ins))))
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(if (identifier? #'ctor)
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(values (cons #'ctor (reverse pr))
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(cons #'ctor (reverse g))
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bs
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(cons #'ctor (reverse ins)))
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(values (reverse pr)
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(reverse g)
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bs
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(reverse ins))))]
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[?
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(raise-syntax-error #f
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"Invalid use of '?' in pattern; use '_' instead"
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outer-expr-stx
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pat-stx)]
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[non-pair
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(if (and (identifier? #'non-pair)
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(free-identifier=? #'non-pair #'_))
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(values #'?
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#'?
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'()
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#'_)
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(values #'non-pair
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#'non-pair
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'()
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#'non-pair))])))
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)
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(struct predicate-match (predicate sub-pattern) #:transparent)
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;; Value Projection -> (Option (Listof Value))
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;; Match a single value against a projection, returning a list of
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;; captured values.
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(define (match-value/captures v p)
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(define captures-rev
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(let walk ((v v) (p p) (captures-rev '()))
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(match* (v p)
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[(_ (capture sub))
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(match (walk v sub '())
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[#f #f]
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['() (cons v captures-rev)]
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[_ (error 'match-value/captures "Bindings in capture sub-patterns not supported")])]
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[(_ (predicate-match pred? sub)) #:when (pred? v)
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(walk v sub captures-rev)]
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[(_ (== ?))
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captures-rev]
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[((cons v1 v2) (cons p1 p2))
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(match (walk v1 p1 captures-rev)
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[#f #f]
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[c (walk v2 p2 c)])]
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[((? vector? v) (? vector? p)) #:when (= (vector-length v) (vector-length p))
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(for/fold [(c captures-rev)] [(vv (in-vector v)) (pp (in-vector p))]
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(walk vv pp c))]
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[(_ _) #:when (or (treap? v) (treap? p))
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(error 'match-value/captures "Cannot match on treaps at present")]
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[((? non-object-struct?) (? non-object-struct?))
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#:when (eq? (struct->struct-type v) (struct->struct-type p))
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(walk (struct->vector v) (struct->vector p) captures-rev)]
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[(_ _) #:when (equal? v p)
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captures-rev]
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[(_ _)
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#f])))
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(and captures-rev (reverse captures-rev)))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define (pretty-print-actor-state s [p (current-output-port)])
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@ -990,46 +851,3 @@
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(fprintf p " - ")
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(display (indented-port-output 3 (lambda (p) (syndicate-pretty-print mux p)) #:first-line? #f) p)
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(newline p))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(module+ test
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(require rackunit)
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(check-equal? (match-value/captures (list 1 2 3)
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(list 1 2 3))
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'())
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(check-equal? (match-value/captures (list 1 2 3)
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(list 1 22 3))
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#f)
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(check-equal? (match-value/captures (list 1 2 3)
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(list (?!) (?!) (?!)))
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(list 1 2 3))
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(check-equal? (match-value/captures (list 1 2 3)
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(list (?!) 2 (?!)))
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(list 1 3))
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(check-equal? (match-value/captures (list 1 2 3)
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(list (?!) ? (?!)))
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(list 1 3))
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(check-equal? (match-value/captures (list 1 2 3)
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(list (?!) (?! 2) (?!)))
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(list 1 2 3))
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(check-equal? (match-value/captures (list 1 2 3)
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(list (?!) (?! 22) (?!)))
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#f)
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(struct x (a b) #:prefab)
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(struct y (z w) #:prefab)
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(check-equal? (match-value/captures (x 1 2) (x 1 2)) '())
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(check-equal? (match-value/captures (x 1 22) (x 1 2)) #f)
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(check-equal? (match-value/captures (x 1 2) (x 1 22)) #f)
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(check-equal? (match-value/captures (x 1 2) (?! (x ? ?))) (list (x 1 2)))
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(check-equal? (match-value/captures (x 1 2) (?! (x ? 2))) (list (x 1 2)))
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(check-equal? (match-value/captures (x 1 2) (?! (x ? 22))) #f)
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(check-equal? (match-value/captures 123 (predicate-match even? ?)) #f)
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(check-equal? (match-value/captures 124 (predicate-match even? ?)) '())
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(check-equal? (match-value/captures (list 123) (list (predicate-match even? ?))) #f)
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(check-equal? (match-value/captures (list 124) (list (predicate-match even? ?))) '())
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(check-equal? (match-value/captures (list 124) (?! (list (predicate-match even? ?)))) '((124))))
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@ -7,7 +7,7 @@
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for-trie)
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(require "core.rkt"
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(only-in "actor.rkt" analyze-pattern)
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"pattern.rkt"
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(for-syntax racket/syntax)
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(for-syntax syntax/strip-context)
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(for-syntax racket/match))
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@ -0,0 +1,190 @@
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#lang racket/base
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;; HLL pattern analysis & processing
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(provide (for-syntax analyze-pattern)
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(struct-out predicate-match)
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match-value/captures
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)
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(require (for-syntax racket/base))
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(require (for-syntax racket/match))
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(require (for-syntax syntax/parse))
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(require racket/match)
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(require "support/struct.rkt")
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(require "treap.rkt")
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(require "core.rkt")
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(struct predicate-match (predicate sub-pattern) #:transparent)
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;; Value Projection -> (Option (Listof Value))
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;; Match a single value against a projection, returning a list of
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;; captured values.
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(define (match-value/captures v p)
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(define captures-rev
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(let walk ((v v) (p p) (captures-rev '()))
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(match* (v p)
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[(_ (capture sub))
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(match (walk v sub '())
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[#f #f]
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['() (cons v captures-rev)]
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[_ (error 'match-value/captures "Bindings in capture sub-patterns not supported")])]
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[(_ (predicate-match pred? sub)) #:when (pred? v)
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(walk v sub captures-rev)]
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[(_ (== ?))
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captures-rev]
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[((cons v1 v2) (cons p1 p2))
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(match (walk v1 p1 captures-rev)
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[#f #f]
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[c (walk v2 p2 c)])]
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[((? vector? v) (? vector? p)) #:when (= (vector-length v) (vector-length p))
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(for/fold [(c captures-rev)] [(vv (in-vector v)) (pp (in-vector p))]
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(walk vv pp c))]
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[(_ _) #:when (or (treap? v) (treap? p))
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(error 'match-value/captures "Cannot match on treaps at present")]
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[((? non-object-struct?) (? non-object-struct?))
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#:when (eq? (struct->struct-type v) (struct->struct-type p))
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(walk (struct->vector v) (struct->vector p) captures-rev)]
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[(_ _) #:when (equal? v p)
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captures-rev]
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[(_ _)
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#f])))
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(and captures-rev (reverse captures-rev)))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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||||
|
||||
(begin-for-syntax
|
||||
(define (dollar-id? stx)
|
||||
(and (identifier? stx)
|
||||
(char=? (string-ref (symbol->string (syntax-e stx)) 0) #\$)))
|
||||
|
||||
(define (undollar stx)
|
||||
(and (dollar-id? stx)
|
||||
(datum->syntax stx (string->symbol (substring (symbol->string (syntax-e stx)) 1)))))
|
||||
|
||||
;; Syntax -> (Values Projection AssertionSetPattern (ListOf Identifier) Syntax)
|
||||
(define (analyze-pattern outer-expr-stx pat-stx0)
|
||||
(let walk ((pat-stx pat-stx0))
|
||||
(syntax-case pat-stx ($ ? quasiquote unquote quote)
|
||||
;; Extremely limited support for quasiquoting and quoting
|
||||
[(quasiquote (unquote p)) (walk #'p)]
|
||||
[(quasiquote (p ...)) (walk #'(list (quasiquote p) ...))]
|
||||
[(quasiquote p) (values #''p #''p '() #''p)]
|
||||
[(quote p) (values #''p #''p '() #''p)]
|
||||
|
||||
[$v
|
||||
(dollar-id? #'$v)
|
||||
(with-syntax [(v (undollar #'$v))]
|
||||
(values #'(?!)
|
||||
#'?
|
||||
(list #'v)
|
||||
#'v))]
|
||||
|
||||
[($ v p)
|
||||
(let ()
|
||||
(define-values (pr g bs _ins) (walk #'p))
|
||||
(when (not (null? bs))
|
||||
(raise-syntax-error #f "nested bindings not supported" outer-expr-stx pat-stx))
|
||||
(values #`(?! #,pr)
|
||||
g
|
||||
(list #'v)
|
||||
#'v))]
|
||||
|
||||
[(? pred? p)
|
||||
;; TODO: support pred? in asserted/retracted as well as message events
|
||||
(let ()
|
||||
(syntax-parse outer-expr-stx
|
||||
#:literals [message]
|
||||
[(message _ ...) 'ok]
|
||||
[_ (raise-syntax-error #f
|
||||
"Predicate '?' matching only supported in message events"
|
||||
outer-expr-stx
|
||||
pat-stx)])
|
||||
(define-values (pr g bs ins) (walk #'p))
|
||||
(values #`(predicate-match pred? #,pr)
|
||||
g
|
||||
bs
|
||||
ins))]
|
||||
|
||||
[(ctor p ...)
|
||||
(let ()
|
||||
(define parts (if (identifier? #'ctor) #'(p ...) #'(ctor p ...)))
|
||||
(define-values (pr g bs ins)
|
||||
(for/fold [(pr '()) (g '()) (bs '()) (ins '())] [(p (syntax->list parts))]
|
||||
(define-values (pr1 g1 bs1 ins1) (walk p))
|
||||
(values (cons pr1 pr)
|
||||
(cons g1 g)
|
||||
(append bs bs1)
|
||||
(cons ins1 ins))))
|
||||
(if (identifier? #'ctor)
|
||||
(values (cons #'ctor (reverse pr))
|
||||
(cons #'ctor (reverse g))
|
||||
bs
|
||||
(cons #'ctor (reverse ins)))
|
||||
(values (reverse pr)
|
||||
(reverse g)
|
||||
bs
|
||||
(reverse ins))))]
|
||||
|
||||
[?
|
||||
(raise-syntax-error #f
|
||||
"Invalid use of '?' in pattern; use '_' instead"
|
||||
outer-expr-stx
|
||||
pat-stx)]
|
||||
|
||||
[non-pair
|
||||
(if (and (identifier? #'non-pair)
|
||||
(free-identifier=? #'non-pair #'_))
|
||||
(values #'?
|
||||
#'?
|
||||
'()
|
||||
#'_)
|
||||
(values #'non-pair
|
||||
#'non-pair
|
||||
'()
|
||||
#'non-pair))]))))
|
||||
|
||||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||||
|
||||
(module+ test
|
||||
(require rackunit)
|
||||
|
||||
(check-equal? (match-value/captures (list 1 2 3)
|
||||
(list 1 2 3))
|
||||
'())
|
||||
(check-equal? (match-value/captures (list 1 2 3)
|
||||
(list 1 22 3))
|
||||
#f)
|
||||
(check-equal? (match-value/captures (list 1 2 3)
|
||||
(list (?!) (?!) (?!)))
|
||||
(list 1 2 3))
|
||||
(check-equal? (match-value/captures (list 1 2 3)
|
||||
(list (?!) 2 (?!)))
|
||||
(list 1 3))
|
||||
(check-equal? (match-value/captures (list 1 2 3)
|
||||
(list (?!) ? (?!)))
|
||||
(list 1 3))
|
||||
(check-equal? (match-value/captures (list 1 2 3)
|
||||
(list (?!) (?! 2) (?!)))
|
||||
(list 1 2 3))
|
||||
(check-equal? (match-value/captures (list 1 2 3)
|
||||
(list (?!) (?! 22) (?!)))
|
||||
#f)
|
||||
|
||||
(struct x (a b) #:prefab)
|
||||
(struct y (z w) #:prefab)
|
||||
|
||||
(check-equal? (match-value/captures (x 1 2) (x 1 2)) '())
|
||||
(check-equal? (match-value/captures (x 1 22) (x 1 2)) #f)
|
||||
(check-equal? (match-value/captures (x 1 2) (x 1 22)) #f)
|
||||
(check-equal? (match-value/captures (x 1 2) (?! (x ? ?))) (list (x 1 2)))
|
||||
(check-equal? (match-value/captures (x 1 2) (?! (x ? 2))) (list (x 1 2)))
|
||||
(check-equal? (match-value/captures (x 1 2) (?! (x ? 22))) #f)
|
||||
|
||||
(check-equal? (match-value/captures 123 (predicate-match even? ?)) #f)
|
||||
(check-equal? (match-value/captures 124 (predicate-match even? ?)) '())
|
||||
(check-equal? (match-value/captures (list 123) (list (predicate-match even? ?))) #f)
|
||||
(check-equal? (match-value/captures (list 124) (list (predicate-match even? ?))) '())
|
||||
(check-equal? (match-value/captures (list 124) (?! (list (predicate-match even? ?)))) '((124))))
|
||||
Loading…
Reference in New Issue