525 lines
20 KiB
Racket
525 lines
20 KiB
Racket
#lang turnstile
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(provide #%module-begin
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#%app
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(rename-out [typed-quote quote])
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#%top-interaction
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require only-in
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;; Start dataspace programs
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run-ground-dataspace
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;; Types
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Tuple Bind Discard → ∀
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Role Reacts Shares Know ¬Know Message OnDataflow Stop OnStart OnStop
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FacetName Field ★/t
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Observe Inbound Outbound Actor U ⊥
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Computation Value Endpoints Roles Spawns
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→fn proc
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;; Statements
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let let* if spawn dataspace start-facet set! begin stop begin/dataflow #;unsafe-do
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when unless send! define
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;; Derived Forms
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during
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define/query-value
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define/query-set
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define/query-hash
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;; endpoints
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assert on field
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;; expressions
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tuple select lambda ref observe inbound outbound
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Λ inst call/inst
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;; making types
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define-type-alias
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assertion-struct
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define-constructor define-constructor*
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;; values
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#%datum
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;; patterns
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bind discard
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;; primitives
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(all-from-out "prim.rkt")
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;; expressions
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(all-from-out "core-expressions.rkt")
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;; lists
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(all-from-out "list.rkt")
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;; sets
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(all-from-out "set.rkt")
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;; sequences
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(all-from-out "sequence.rkt")
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;; hash tables
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(all-from-out "hash.rkt")
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;; for loops
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(all-from-out "for-loops.rkt")
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;; utility datatypes
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(all-from-out "maybe.rkt")
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(all-from-out "either.rkt")
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;; DEBUG and utilities
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print-type print-role role-strings
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;; Extensions
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match cond
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;; require & provides
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require provide
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submod for-syntax for-meta only-in except-in
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require/typed
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require-struct
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)
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(require "core-types.rkt")
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(require "core-expressions.rkt")
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(require "list.rkt")
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(require "set.rkt")
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(require "prim.rkt")
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(require "sequence.rkt")
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(require "hash.rkt")
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(require "for-loops.rkt")
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(require "maybe.rkt")
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(require "either.rkt")
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(require (prefix-in syndicate: syndicate/actor-lang))
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(require (submod syndicate/actor priorities))
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(require (for-meta 2 macrotypes/stx-utils racket/list syntax/stx syntax/parse racket/base))
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(require macrotypes/postfix-in)
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(require (for-syntax turnstile/mode))
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(require (postfix-in - racket/list))
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(require (postfix-in - racket/set))
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(module+ test
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(require rackunit)
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(require rackunit/turnstile))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Creating Communication Types
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define-simple-macro (assertion-struct name:id (~datum :) Name:id (slot:id ...))
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(define-constructor* (name : Name slot ...)))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Compile-time State
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(begin-for-syntax
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(define current-communication-type (make-parameter #f))
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;; Type -> Mode
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(define (communication-type-mode ty)
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(make-param-mode current-communication-type ty))
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(define (elaborate-pattern/with-com-ty pat)
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(define τ? (current-communication-type))
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(if τ?
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(elaborate-pattern/with-type pat τ?)
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(elaborate-pattern pat))))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Core forms
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define-typed-syntax (start-facet name:id ep ...+) ≫
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#:with name- (syntax-local-identifier-as-binding (syntax-local-introduce (generate-temporary #'name)))
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#:with name+ (syntax-local-identifier-as-binding #'name)
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#:with facet-name-ty (type-eval #'FacetName)
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#:do [(define ctx (syntax-local-make-definition-context))
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(define unique (gensym 'start-facet))
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(define name-- (add-orig (internal-definition-context-introduce ctx #'name- 'add)
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#'name))
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(int-def-ctx-bind-type-rename #'name+ #'name- #'facet-name-ty ctx)
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(define-values (ep-... τ... ep-effects facet-effects spawn-effects)
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(walk/bind #'(ep ...) ctx unique))
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(unless (and (stx-null? facet-effects) (stx-null? spawn-effects))
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(type-error #:src #'(ep ...) #:msg "only endpoint effects allowed"))]
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#:with ((~or (~and τ-a (~Shares _))
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;; untyped syndicate might allow this - TODO
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#;(~and τ-m (~Sends _))
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(~and τ-r (~Reacts _ ...))
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~MakesField)
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...)
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ep-effects
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#:with τ (type-eval #`(Role (#,name--)
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τ-a ...
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;; τ-m ...
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τ-r ...))
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--------------------------------------------------------------
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[⊢ (syndicate:react (let- ([#,name-- (#%app- syndicate:current-facet-id)])
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#,@ep-...))
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(⇒ : ★/t)
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(⇒ ν-f (τ))])
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(define-typed-syntax (field [x:id τ-f:type e:expr] ...) ≫
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#:fail-unless (stx-andmap flat-type? #'(τ-f ...)) "keep your uppity data outta my fields"
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[⊢ e ≫ e- (⇐ : τ-f)] ...
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#:fail-unless (stx-andmap pure? #'(e- ...)) "field initializers not allowed to have effects"
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#:with (x- ...) (generate-temporaries #'(x ...))
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#:with (τ ...) (stx-map type-eval #'((Field τ-f.norm) ...))
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#:with MF (type-eval #'MakesField)
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----------------------------------------------------------------------
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[⊢ (field/intermediate [x x- τ e-] ...)
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(⇒ : ★/t)
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(⇒ ν-ep (MF))])
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(define-typed-syntax (assert e:expr) ≫
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[⊢ e ≫ e- (⇒ : τ)]
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#:fail-unless (pure? #'e-) "expression not allowed to have effects"
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#:with τs (mk-Shares- #'(τ))
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-------------------------------------
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[⊢ (syndicate:assert e-) (⇒ : ★/t)
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(⇒ ν-ep (τs))])
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(define-typed-syntax (send! e:expr) ≫
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[⊢ e ≫ e- (⇒ : τ)]
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#:fail-unless (pure? #'e-) "expression not allowed to have effects"
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#:with τm (mk-Sends- #'(τ))
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--------------------------------------
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[⊢ (#%app- syndicate:send! e-) (⇒ : ★/t)
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(⇒ ν-f (τm))])
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(define-typed-syntax (stop facet-name:id cont ...) ≫
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[⊢ facet-name ≫ facet-name- (⇐ : FacetName)]
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[⊢ (begin #f cont ...) ≫ cont- (⇒ ν-ep (~effs)) (⇒ ν-s (~effs)) (⇒ ν-f (~effs τ-f ...))]
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#:with τ (mk-Stop- #`(facet-name- τ-f ...))
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---------------------------------------------------------------------------------
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[⊢ (syndicate:stop-facet facet-name- cont-) (⇒ : ★/t)
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(⇒ ν-f (τ))])
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(begin-for-syntax
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(define-syntax-class asserted/retracted/message
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#:datum-literals (asserted retracted message)
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(pattern (~or (~and asserted
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(~bind [syndicate-kw #'syndicate:asserted]
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[react-con #'Know]))
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(~and retracted
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(~bind [syndicate-kw #'syndicate:retracted]
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[react-con #'¬Know]))
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(~and message
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(~bind [syndicate-kw #'syndicate:message]
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[react-con #'Message])))))
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(define-syntax-class priority-level
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#:literals (*query-priority-high*
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*query-priority*
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*query-handler-priority*
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*normal-priority*
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*gc-priority*
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*idle-priority*)
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(pattern (~and level
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(~or *query-priority-high*
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*query-priority*
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*query-handler-priority*
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*normal-priority*
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*gc-priority*
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*idle-priority*))))
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(define-splicing-syntax-class priority
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#:attributes (level)
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(pattern (~seq #:priority l:priority-level)
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#:attr level #'l.level)
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(pattern (~seq)
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#:attr level #'*normal-priority*))
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)
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(define-typed-syntax on
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[(on (~literal start) s ...) ≫
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[⊢ (begin s ...) ≫ s- (⇒ ν-ep (~effs))
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(⇒ ν-f (~effs τ-f ...))
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(⇒ ν-s (~effs τ-s ...))]
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#:with τ-r (type-eval #'(Reacts OnStart τ-f ... τ-s ...))
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-----------------------------------
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[⊢ (syndicate:on-start s-) (⇒ : ★/t)
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(⇒ ν-ep (τ-r))]]
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[(on (~literal stop) s ...) ≫
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[⊢ (begin s ...) ≫ s- (⇒ ν-ep (~effs))
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(⇒ ν-f (~effs τ-f ...))
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(⇒ ν-s (~effs τ-s ...))]
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#:with τ-r (type-eval #'(Reacts OnStop τ-f ... τ-s ...))
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-----------------------------------
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[⊢ (syndicate:on-stop s-) (⇒ : ★/t)
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(⇒ ν-ep (τ-r))]]
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[(on (a/r/m:asserted/retracted/message p)
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priority:priority
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s ...) ≫
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#:do [(define msg? (free-identifier=? #'syndicate:message (attribute a/r/m.syndicate-kw)))
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(define elab
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(elaborate-pattern/with-com-ty (if msg? #'(message p) #'p)))]
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#:with p/e (if msg? (stx-cadr elab) elab)
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[⊢ p/e ≫ p-- (⇒ : τp)]
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#:fail-unless (pure? #'p--) "pattern not allowed to have effects"
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#:with ([x:id τ:type] ...) (pat-bindings #'p/e)
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[[x ≫ x- : τ] ... ⊢ (begin s ...) ≫ s-
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(⇒ ν-ep (~effs))
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(⇒ ν-f (~effs τ-f ...))
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(⇒ ν-s (~effs τ-s ...))]
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#:with p- (substs #'(x- ...) #'(x ...) (compile-syndicate-pattern #'p/e))
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#:with τ-r (type-eval #'(Reacts (a/r/m.react-con τp) τ-f ... τ-s ...))
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-----------------------------------
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[⊢ (syndicate:on (a/r/m.syndicate-kw p-)
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#:priority priority.level
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s-)
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(⇒ : ★/t)
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(⇒ ν-ep (τ-r))]])
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(define-typed-syntax (begin/dataflow s ...+) ≫
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[⊢ (begin s ...) ≫ s-
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(⇒ : _)
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(⇒ ν-ep (~effs))
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(⇒ ν-f (~effs τ-f ...))
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(⇒ ν-s (~effs τ-s ...))]
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#:with τ-r (type-eval #'(Reacts OnDataflow τ-f ... τ-s ...))
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--------------------------------------------------
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[⊢ (syndicate:begin/dataflow s-)
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(⇒ : ★/t)
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(⇒ ν-ep (τ-r))])
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(define-for-syntax (compile-syndicate-pattern pat)
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(compile-pattern pat
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#'list-
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(lambda (id) #`($ #,id))
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identity))
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(define-typed-syntax spawn
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[(spawn τ-c:type s) ≫
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#:fail-unless (flat-type? #'τ-c.norm) "Communication type must be first-order"
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;; TODO: check that each τ-f is a Role
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#:mode (communication-type-mode #'τ-c.norm)
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[
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[⊢ s ≫ s- (⇒ ν-ep (~effs)) (⇒ ν-s (~effs)) (⇒ ν-f (~effs τ-f ...))]
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]
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;; TODO: s shouldn't refer to facets or fields!
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#:with (τ-i τ-o τ-a) (analyze-roles #'(τ-f ...))
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#:fail-unless (<: #'τ-o #'τ-c.norm)
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(format "Output ~a not valid in dataspace ~a" (type->str #'τ-o) (type->str #'τ-c.norm))
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#:with τ-final (mk-Actor- #'(τ-c.norm))
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#:fail-unless (<: #'τ-a #'τ-final)
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"Spawned actors not valid in dataspace"
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#:fail-unless (project-safe? (∩ (strip-? #'τ-o) #'τ-c.norm)
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#'τ-i)
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"Not prepared to handle all inputs"
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--------------------------------------------------------------------------------------------
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[⊢ (syndicate:spawn (syndicate:on-start s-)) (⇒ : ★/t)
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(⇒ ν-s (τ-final))]]
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[(spawn s) ≫
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#:do [(define τc (current-communication-type))]
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#:when τc
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----------------------------------------
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[≻ (spawn #,τc s)]])
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(define-typed-syntax (dataspace τ-c:type s ...) ≫
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#:fail-unless (flat-type? #'τ-c.norm) "Communication type must be first-order"
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#:mode (communication-type-mode #'τ-c.norm)
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[
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[⊢ s ≫ s- (⇒ ν-ep (~effs)) (⇒ ν-s (~effs τ-s ...)) (⇒ ν-f (~effs))] ...
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]
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#:with τ-actor (mk-Actor- #'(τ-c.norm))
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#:fail-unless (stx-andmap (lambda (t) (<: t #'τ-actor)) #'(τ-s ... ...))
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"Not all actors conform to communication type"
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#:with τ-ds-i (strip-inbound #'τ-c.norm)
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#:with τ-ds-o (strip-outbound #'τ-c.norm)
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#:with τ-relay (relay-interests #'τ-c.norm)
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-----------------------------------------------------------------------------------
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[⊢ (syndicate:dataspace s- ...) (⇒ : ★/t)
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(⇒ ν-s ((Actor (U τ-ds-i τ-ds-o τ-relay))))])
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(define-typed-syntax (set! x:id e:expr) ≫
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[⊢ e ≫ e- (⇒ : τ)]
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#:fail-unless (pure? #'e-) "expression not allowed to have effects"
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[⊢ x ≫ x- (⇒ : (~Field τ-x:type))]
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#:fail-unless (<: #'τ #'τ-x) "Ill-typed field write"
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----------------------------------------------------
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[⊢ (#%app- x- e-) (⇒ : ★/t)])
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Derived Forms
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define-typed-syntax (during p s ...) ≫
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#:with p+ (elaborate-pattern/with-com-ty #'p)
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#:with inst-p (instantiate-pattern #'p+)
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----------------------------------------
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[≻ (on (asserted p+)
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(start-facet during-inner
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(on (retracted inst-p)
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(stop during-inner))
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s ...))])
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;; TODO - reconcile this with `compile-pattern`
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(define-for-syntax (instantiate-pattern pat)
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(let loop ([pat pat])
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(syntax-parse pat
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#:datum-literals (tuple discard bind)
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[(tuple p ...)
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#`(tuple #,@(stx-map loop #'(p ...)))]
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[(k:kons1 p)
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#`(k #,(loop #'p))]
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[(bind x:id τ)
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#'x]
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;; not sure about this
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[discard
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#'discard]
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[(~constructor-exp ctor p ...)
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(define/with-syntax uctor (untyped-ctor #'ctor))
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#`(ctor #,@(stx-map loop #'(p ...)))]
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[_
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pat])))
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(begin-for-syntax
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(define-splicing-syntax-class on-add
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#:attributes (expr)
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(pattern (~seq #:on-add add-e)
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#:attr expr #'add-e)
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(pattern (~seq)
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#:attr expr #'#f))
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(define-splicing-syntax-class on-remove
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#:attributes (expr)
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(pattern (~seq #:on-remove remove-e)
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#:attr expr #'remove-e)
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(pattern (~seq)
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#:attr expr #'#f)))
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(define-typed-syntax (define/query-value x:id e0 p e
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(~optional add:on-add)
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(~optional remove:on-remove)) ≫
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[⊢ e0 ≫ e0- (⇒ : τ)]
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#:fail-unless (pure? #'e0-) "expression must be pure"
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----------------------------------------
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[≻ (begin (field [x τ e0-])
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(on (asserted p)
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#:priority *query-priority*
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(set! x e)
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add.expr)
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(on (retracted p)
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#:priority *query-priority-high*
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(set! x e0-)
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remove.expr))])
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(define-typed-syntax (define/query-set x:id p e
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(~optional add:on-add)
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(~optional remove:on-remove)) ≫
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#:with p+ (elaborate-pattern/with-com-ty #'p)
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#:with ([y τ] ...) (pat-bindings #'p+)
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;; e will be re-expanded :/
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[[y ≫ y- : τ] ... ⊢ e ≫ e- ⇒ τ-e]
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----------------------------------------
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[≻ (begin (field [x (Set τ-e) (set)])
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(on (asserted p+)
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#:priority *query-priority*
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(set! x (set-add (ref x) e))
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add.expr)
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(on (retracted p+)
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#:priority *query-priority-high*
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(set! x (set-remove (ref x) e))
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remove.expr))])
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(define-typed-syntax (define/query-hash x:id p e-key e-value
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(~optional add:on-add)
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(~optional remove:on-remove)) ≫
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#:with p+ (elaborate-pattern/with-com-ty #'p)
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#:with ([y τ] ...) (pat-bindings #'p+)
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;; e-key and e-value will be re-expanded :/
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;; but it's the most straightforward way to keep bindings in sync with
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;; pattern
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[[y ≫ y- : τ] ... ⊢ e-key ≫ e-key- ⇒ τ-key]
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[[y ≫ y-- : τ] ... ⊢ e-value ≫ e-value- ⇒ τ-value]
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;; TODO - this is gross, is there a better way to do this?
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;; #:with e-value-- (substs #'(y- ...) #'(y-- ...) #'e-value- free-identifier=?)
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;; I thought I could put e-key- and e-value-(-) in the output below, but that
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;; gets their references to pattern variables out of sync with `p`
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----------------------------------------
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[≻ (begin (field [x (Hash τ-key τ-value) (hash)])
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(on (asserted p+)
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#:priority *query-priority*
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(set! x (hash-set (ref x) e-key e-value))
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add.expr)
|
||
(on (retracted p+)
|
||
#:priority *query-priority-high*
|
||
(set! x (hash-remove (ref x) e-key))
|
||
remove.expr))])
|
||
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
;; Expressions
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
|
||
(define-typed-syntax (ref x:id) ≫
|
||
[⊢ x ≫ x- ⇒ (~Field τ)]
|
||
------------------------
|
||
[⊢ (#%app- x-) (⇒ : τ)])
|
||
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
;; Ground Dataspace
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
|
||
;; n.b. this is a blocking operation, so an actor that uses this internally
|
||
;; won't necessarily terminate.
|
||
(define-typed-syntax (run-ground-dataspace τ-c:type s ...) ≫
|
||
[⊢ (dataspace τ-c s ...) ≫ ((~literal erased) ((~literal syndicate:dataspace) s- ...)) (⇒ : t)]
|
||
-----------------------------------------------------------------------------------
|
||
[⊢ (#%app- syndicate:run-ground s- ...) (⇒ : (AssertionSet τ-c))])
|
||
|
||
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
;; Utilities
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
|
||
(define-typed-syntax (print-type e) ≫
|
||
[⊢ e ≫ e- (⇒ : τ) (⇒ ν-ep (~effs eps ...)) (⇒ ν-f (~effs fs ...)) (⇒ ν-s (~effs ss ...))]
|
||
#:do [(pretty-display (type->str #'τ))]
|
||
----------------------------------
|
||
[⊢ e- (⇒ : τ) (⇒ ν-ep (eps ...)) (⇒ ν-f (fs ...)) (⇒ ν-s (ss ...))])
|
||
|
||
(define-typed-syntax (print-role e) ≫
|
||
[⊢ e ≫ e- (⇒ : τ) (⇒ ν-ep (~effs eps ...)) (⇒ ν-f (~effs fs ...)) (⇒ ν-s (~effs ss ...))]
|
||
#:do [(for ([r (in-syntax #'(fs ...))])
|
||
(pretty-display (type->strX r)))]
|
||
----------------------------------
|
||
[⊢ e- (⇒ : τ) (⇒ ν-ep (eps ...)) (⇒ ν-f (fs ...)) (⇒ ν-s (ss ...))])
|
||
|
||
;; this is mainly for testing
|
||
(define-typed-syntax (role-strings e) ≫
|
||
[⊢ e ≫ e- (⇒ : τ) (⇒ ν-f (~effs fs ...))]
|
||
#:with (s ...) (for/list ([r (in-syntax #'(fs ...))])
|
||
(type->strX r))
|
||
----------------------------------------
|
||
[⊢ (#%app- list- (#%datum- . s) ...) (⇒ : (List String))])
|
||
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
;; Tests
|
||
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
||
|
||
(module+ test
|
||
(check-type (spawn (U (Message (Tuple String Int))
|
||
(Observe (Tuple String ★/t)))
|
||
(start-facet echo
|
||
(on (message (tuple "ping" $x))
|
||
(send! (tuple "pong" x)))))
|
||
: ★/t)
|
||
(typecheck-fail (spawn (U (Message (Tuple String Int))
|
||
(Message (Tuple String String))
|
||
(Observe (Tuple String ★/t)))
|
||
(start-facet echo
|
||
(on (message (tuple "ping" (bind x Int)))
|
||
(send! (tuple "pong" x)))))))
|
||
|
||
;; local definitions
|
||
#;(module+ test
|
||
;; these cause an error in rackunit-typechecking, don't know why :/
|
||
#;(check-type (let ()
|
||
(begin
|
||
(define id : Int 1234)
|
||
id))
|
||
: Int
|
||
-> 1234)
|
||
#;(check-type (let ()
|
||
(define (spawn-cell [initial-value : Int])
|
||
(define id 1234)
|
||
id)
|
||
(typed-app spawn-cell 42))
|
||
: Int
|
||
-> 1234)
|
||
(check-equal? (let ()
|
||
(define id : Int 1234)
|
||
id)
|
||
1234)
|
||
#;(check-equal? (let ()
|
||
(define (spawn-cell [initial-value : Int])
|
||
(define id 1234)
|
||
id)
|
||
(typed-app spawn-cell 42))
|
||
1234))
|