1442 lines
54 KiB
Racket
1442 lines
54 KiB
Racket
#lang turnstile
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(provide (rename-out [syndicate:#%module-begin #%module-begin])
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(rename-out [typed-app #%app])
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#%top-interaction
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require only-in
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;; Types
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Int Bool String Tuple Bind Discard → List
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Role Reacts Shares Know ¬Know Message Stop
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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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;; Statements
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let let* if spawn dataspace start-facet set! begin stop #;unsafe-do
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;; Derived Forms
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during define/query-value
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;; endpoints
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assert on field
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;; expressions
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tuple lambda ref observe inbound outbound
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;; making types
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define-type-alias
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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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+ - * / and or not > < >= <= = equal? displayln printf define
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;; lists
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list first rest member? empty? for for/fold
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;; sets
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Set set set-member? set-add set-count set-union set-subtract set-intersect
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list->set set->list
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;; DEBUG and utilities
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print-type print-role
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;; Extensions
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match cond
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)
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(require (prefix-in syndicate: syndicate/actor-lang))
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(require (for-meta 2 macrotypes/stx-utils racket/list syntax/stx))
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(require (for-syntax turnstile/examples/util/filter-maximal))
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(require macrotypes/postfix-in)
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(require (rename-in racket/math [exact-truncate exact-truncate-]))
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(require (postfix-in - racket/list))
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(require (postfix-in - racket/set))
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(require (postfix-in - racket/match))
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(module+ test
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(require rackunit)
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(require turnstile/rackunit-typechecking))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Type Checking Conventions
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; : describes the immediate result of evaluation
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;; ep key aggregates endpoint affects:
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;; `Shares`, `Reacts`, and `MakesField`
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;; Note thar MakesField is only an effect, not a type
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;; f key aggregates facet effects (starting a facet) as `Role`s
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;; s key aggregates spawned actors as `Actor`s
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Types
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define-binding-type Role #:arity >= 0 #:bvs = 1)
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(define-type-constructor Shares #:arity = 1)
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(define-type-constructor Reacts #:arity >= 1)
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(define-type-constructor Know #:arity = 1)
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(define-type-constructor ¬Know #:arity = 1)
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(define-type-constructor Stop #:arity >= 1)
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(define-type-constructor Message #:arity = 1)
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(define-type-constructor Field #:arity = 1)
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(define-type-constructor Bind #:arity = 1)
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(define-base-types OnStart OnStop MakesField)
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(define-for-syntax field-prop-name 'fields)
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(define-type-constructor Tuple #:arity >= 0)
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(define-type-constructor Observe #:arity = 1)
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(define-type-constructor Inbound #:arity = 1)
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(define-type-constructor Outbound #:arity = 1)
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(define-type-constructor Actor #:arity = 1)
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(define-type-constructor AssertionSet #:arity = 1)
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(define-type-constructor Patch #:arity = 2)
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(define-type-constructor List #:arity = 1)
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(define-type-constructor Set #:arity = 1)
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(define-type-constructor → #:arity > 0)
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;; for describing the RHS
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;; a value and a description of the effects
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(define-type-constructor Computation #:arity = 4)
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(define-type-constructor Value #:arity = 1)
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(define-type-constructor Endpoints #:arity >= 0)
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(define-type-constructor Roles #:arity >= 0)
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(define-type-constructor Spawns #:arity >= 0)
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(define-base-types Int Bool String Discard ★/t FacetName)
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(define-for-syntax (type-eval t)
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((current-type-eval) t))
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(define-type-constructor U* #:arity >= 0)
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;; τ.norm in 1st case causes "not valid type" error when referring to ⊥ in another file.
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;; however, this version expands the type at every reference, incurring a potentially large
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;; overhead---2x in the case of book-club.rkt
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;; (copied from ext-stlc example)
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(define-syntax define-type-alias
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(syntax-parser
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[(_ alias:id τ)
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#'(define-syntax- alias
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(make-variable-like-transformer #'τ))]
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[(_ (f:id x:id ...) ty)
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#'(define-syntax- (f stx)
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(syntax-parse stx
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[(_ x ...)
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#:with τ:any-type #'ty
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#'τ.norm]))]))
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(define-type-alias ⊥ (U*))
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(define-for-syntax (prune+sort tys)
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(stx-sort
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(filter-maximal
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(stx->list tys)
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typecheck?)))
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(define-syntax (U stx)
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(syntax-parse stx
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[(_ . tys)
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;; canonicalize by expanding to U*, with only (sorted and pruned) leaf tys
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#:with ((~or (~U* ty1- ...) ty2-) ...) (stx-map (current-type-eval) #'tys)
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#:with tys- (prune+sort #'(ty1- ... ... ty2- ...))
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(if (= 1 (stx-length #'tys-))
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(stx-car #'tys-)
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(syntax/loc stx (U* . tys-)))]))
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;; for looking at the "effects"
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(begin-for-syntax
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(define-syntax ~effs
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(pattern-expander
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(syntax-parser
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[(_ eff:id ...)
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#:with tmp (generate-temporary 'effss)
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#'(~and tmp
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(~parse (eff ...) (stx-or #'tmp #'())))])))
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(define (stx-truth? a)
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(and a (not (and (syntax? a) (false? (syntax-e a))))))
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(define (stx-or a b)
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(cond [(stx-truth? a) a]
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[else b])))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; User Defined Types, aka Constructors
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(begin-for-syntax
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(define-splicing-syntax-class type-constructor-decl
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(pattern (~seq #:type-constructor TypeCons:id))
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(pattern (~seq) #:attr TypeCons #f))
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(struct user-ctor (typed-ctor untyped-ctor)
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#:property prop:procedure
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(lambda (v stx)
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(define transformer (user-ctor-typed-ctor v))
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(syntax-parse stx
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[(_ e ...)
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#`(#,transformer e ...)]))))
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(define-syntax (define-constructor stx)
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(syntax-parse stx
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[(_ (Cons:id slot:id ...)
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ty-cons:type-constructor-decl
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(~seq #:with
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Alias AliasBody) ...)
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#:with TypeCons (or (attribute ty-cons.TypeCons) (format-id stx "~a/t" (syntax-e #'Cons)))
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#:with MakeTypeCons (format-id #'TypeCons "make-~a" #'TypeCons)
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#:with GetTypeParams (format-id #'TypeCons "get-~a-type-params" #'TypeCons)
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#:with TypeConsExpander (format-id #'TypeCons "~~~a" #'TypeCons)
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#:with TypeConsExtraInfo (format-id #'TypeCons "~a-extra-info" #'TypeCons)
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#:with (StructName Cons- type-tag) (generate-temporaries #'(Cons Cons Cons))
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(define arity (stx-length #'(slot ...)))
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#`(begin-
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(struct- StructName (slot ...) #:reflection-name 'Cons #:transparent)
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(define-syntax (TypeConsExtraInfo stx)
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(syntax-parse stx
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[(_ X (... ...)) #'('type-tag 'MakeTypeCons 'GetTypeParams)]))
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(define-type-constructor TypeCons
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#:arity = #,arity
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#:extra-info 'TypeConsExtraInfo)
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(define-syntax (MakeTypeCons stx)
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(syntax-parse stx
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[(_ t (... ...))
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#:fail-unless (= #,arity (stx-length #'(t (... ...)))) "arity mismatch"
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#'(TypeCons t (... ...))]))
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(define-syntax (GetTypeParams stx)
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(syntax-parse stx
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[(_ (TypeConsExpander t (... ...)))
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#'(t (... ...))]))
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(define-syntax Cons
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(user-ctor #'Cons- #'StructName))
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(define-typed-syntax (Cons- e (... ...)) ≫
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#:fail-unless (= #,arity (stx-length #'(e (... ...)))) "arity mismatch"
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[⊢ e ≫ e- (⇒ : τ)] (... ...)
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#:fail-unless (all-pure? #'(e- (... ...))) "expressions must be pure"
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----------------------
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[⊢ (#%app- StructName e- (... ...)) (⇒ : (TypeCons τ (... ...)))])
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(define-type-alias Alias AliasBody) ...)]))
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(begin-for-syntax
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(define-syntax ~constructor-extra-info
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(pattern-expander
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(syntax-parser
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[(_ tag mk get)
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#'(_ (_ tag) (_ mk) (_ get))])))
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(define-syntax ~constructor-type
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(pattern-expander
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(syntax-parser
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[(_ tag . rst)
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#'(~and it
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(~fail #:unless (user-defined-type? #'it))
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(~parse tag (get-type-tag #'it))
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(~Any _ . rst))])))
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(define-syntax ~constructor-exp
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(pattern-expander
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(syntax-parser
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[(_ cons . rst)
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#'(~and (cons . rst)
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(~fail #:unless (ctor-id? #'cons)))])))
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(define (inspect t)
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(syntax-parse t
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[(~constructor-type tag t ...)
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(list (syntax-e #'tag) (stx-map type->str #'(t ...)))]))
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(define (tags-equal? t1 t2)
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(equal? (syntax-e t1) (syntax-e t2)))
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(define (user-defined-type? t)
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(get-extra-info (type-eval t)))
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(define (get-type-tag t)
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(syntax-parse (get-extra-info t)
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[(~constructor-extra-info tag _ _)
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(syntax-e #'tag)]))
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(define (get-type-args t)
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(syntax-parse (get-extra-info t)
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[(~constructor-extra-info _ _ get)
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(define f (syntax-local-value #'get))
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(syntax->list (f #`(get #,t)))]))
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(define (make-cons-type t args)
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(syntax-parse (get-extra-info t)
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[(~constructor-extra-info _ mk _)
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(define f (syntax-local-value #'mk))
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(type-eval (f #`(mk #,@args)))]))
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(define (ctor-id? stx)
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(and (identifier? stx)
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(user-ctor? (syntax-local-value stx (const #f)))))
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(define (untyped-ctor stx)
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(user-ctor-untyped-ctor (syntax-local-value stx (const #f)))))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Conveniences
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Syntax
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(begin-for-syntax
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;; constructors with arity one
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(define-syntax-class kons1
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(pattern (~or (~datum observe)
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(~datum inbound)
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(~datum outbound))))
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(define (kons1->constructor stx)
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(syntax-parse stx
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#:datum-literals (observe inbound outbound)
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[observe #'syndicate:observe]
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[inbound #'syndicate:inbound]
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[outbound #'syndicate:outbound]))
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(define-syntax-class basic-val
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(pattern (~or boolean
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integer
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string)))
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(define-syntax-class prim-op
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(pattern (~or (~literal +)
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(~literal -)
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(~literal displayln)))))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Utilities Over Types
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define-for-syntax (bot? t)
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(<: t (type-eval #'(U*))))
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(define-for-syntax (flat-type? τ)
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(syntax-parse τ
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[(~→ τ ...) #f]
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[(~Actor τ) #f]
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[_ #t]))
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(define-for-syntax (strip-? t)
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(type-eval
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(syntax-parse t
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[(~U* τ ...) #`(U #,@(stx-map strip-? #'(τ ...)))]
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[~★/t #'★/t]
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[(~Observe τ) #'τ]
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[_ #'(U*)])))
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(define-for-syntax (strip-inbound t)
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(type-eval
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(syntax-parse t
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[(~U* τ ...) #`(U #,@(stx-map strip-? #'(τ ...)))]
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[~★/t #'★/t]
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[(~Inbound τ) #'τ]
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[_ #'(U*)])))
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(define-for-syntax (strip-outbound t)
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(type-eval
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(syntax-parse t
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[(~U* τ ...) #`(U #,@(stx-map strip-? #'(τ ...)))]
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[~★/t #'★/t]
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[(~Outbound τ) #'τ]
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[_ #'(U*)])))
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(define-for-syntax (relay-interests t)
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(type-eval
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(syntax-parse t
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;; TODO: probably need to `normalize` the result
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[(~U* τ ...) #`(U #,@(stx-map strip-? #'(τ ...)))]
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[~★/t #'★/t]
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[(~Observe (~Inbound τ)) #'(Observe τ)]
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[_ #'(U*)])))
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;; (SyntaxOf RoleType ...) -> (Syntaxof InputType OutputType SpawnType)
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(define-for-syntax (analyze-roles rs)
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(define-values (lis los lss)
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(for/fold ([is '()]
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[os '()]
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[ss '()])
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([r (in-syntax rs)])
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(define-values (i o s) (analyze-role-input/output r))
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(values (cons i is) (cons o os) (cons s ss))))
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#`(#,(type-eval #`(U #,@lis))
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#,(type-eval #`(U #,@los))
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#,(type-eval #`(U #,@lss))))
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;; Wanted test case, but can't use it bc it uses things defined for-syntax
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#;(module+ test
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(let ([r (type-eval #'(Role (x) (Shares Int)))])
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(syntax-parse (analyze-role-input/output r)
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[(τ-i τ-o)
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(check-true (type=? #'τ-o (type-eval #'Int)))])))
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;; RoleType -> (Values InputType OutputType SpawnType)
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(define-for-syntax (analyze-role-input/output t)
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(syntax-parse t
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[(~Stop name:id τ-r ...)
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#:with (τi τo τa) (analyze-roles #'(τ-r ...))
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(values #'τi #'τo #'τa)]
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[(~Actor τc)
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(values (mk-U*- '()) (mk-U*- '()) t)]
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[(~Role (name:id)
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(~or (~Shares τ-s)
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(~Reacts τ-if τ-then ...)) ...
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(~and (~Role _ ...) sub-role) ...)
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(define-values (is os ss)
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(for/fold ([ins '()]
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[outs '()]
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[spawns '()])
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([t (in-syntax #'(τ-then ... ... sub-role ...))])
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(define-values (i o s) (analyze-role-input/output t))
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(values (cons i ins) (cons o outs) (cons s spawns))))
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(define pat-types (stx-map event-desc-type #'(τ-if ...)))
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(values (type-eval #`(U #,@is #,@pat-types))
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(type-eval #`(U τ-s ... #,@os #,@(stx-map pattern-sub-type pat-types)))
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(type-eval #`(U #,@ss)))]))
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;; EventDescriptorType -> Type
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(define-for-syntax (event-desc-type desc)
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(syntax-parse desc
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[(~Know τ) #'τ]
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[(~¬Know τ) #'τ]
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[(~Message τ) desc]
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[_ (type-eval #'(U*))]))
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;; PatternType -> Type
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(define-for-syntax (pattern-sub-type pt)
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(define t (replace-bind-and-discard-with-★ pt))
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(type-eval #`(Observe #,t)))
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(define-for-syntax (replace-bind-and-discard-with-★ t)
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(syntax-parse t
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[(~Bind _)
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(type-eval #'★/t)]
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[~Discard
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(type-eval #'★/t)]
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[(~U* τ ...)
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(type-eval #`(U #,@(stx-map replace-bind-and-discard-with-★ #'(τ ...))))]
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[(~Tuple τ ...)
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(type-eval #`(Tuple #,@(stx-map replace-bind-and-discard-with-★ #'(τ ...))))]
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[(~Observe τ)
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(type-eval #`(Observe #,(replace-bind-and-discard-with-★ #'τ)))]
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[(~Inbound τ)
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(type-eval #`(Inbound #,(replace-bind-and-discard-with-★ #'τ)))]
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[(~Outbound τ)
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(type-eval #`(Outbound #,(replace-bind-and-discard-with-★ #'τ)))]
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[(~constructor-type _ τ ...)
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(make-cons-type t (stx-map replace-bind-and-discard-with-★ #'(τ ...)))]
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[_ t]))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Subtyping and Judgments on Types
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Type Type -> Bool
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(define-for-syntax (<: t1 t2)
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(syntax-parse #`(#,t1 #,t2)
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[((~U* τ1 ...) _)
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(stx-andmap (lambda (t) (<: t t2)) #'(τ1 ...))]
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[(_ (~U* τ2:type ...))
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(stx-ormap (lambda (t) (<: t1 t)) #'(τ2 ...))]
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[((~Actor τ1) (~Actor τ2))
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(and (<: #'τ1 #'τ2)
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(<: (∩ (strip-? #'τ1) #'τ2) #'τ1))]
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[((~AssertionSet τ1) (~AssertionSet τ2))
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(<: #'τ1 #'τ2)]
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[((~Set τ1) (~Set τ2))
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(<: #'τ1 #'τ2)]
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[((~Patch τ11 τ12) (~Patch τ21 τ22))
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(and (<: #'τ11 #'τ21)
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(<: #'τ12 #'τ22))]
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[((~Tuple τ1:type ...) (~Tuple τ2:type ...))
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|
#:when (stx-length=? #'(τ1 ...) #'(τ2 ...))
|
|
(stx-andmap <: #'(τ1 ...) #'(τ2 ...))]
|
|
[(_ ~★/t)
|
|
(flat-type? t1)]
|
|
[((~Observe τ1:type) (~Observe τ2:type))
|
|
(<: #'τ1 #'τ2)]
|
|
[((~Inbound τ1:type) (~Inbound τ2:type))
|
|
(<: #'τ1 #'τ2)]
|
|
[((~Outbound τ1:type) (~Outbound τ2:type))
|
|
(<: #'τ1 #'τ2)]
|
|
[((~constructor-type t1 τ1:type ...) (~constructor-type t2 τ2:type ...))
|
|
#:when (tags-equal? #'t1 #'t2)
|
|
(and (stx-length=? #'(τ1 ...) #'(τ2 ...))
|
|
(stx-andmap <: #'(τ1 ...) #'(τ2 ...)))]
|
|
[((~→ τ-in1 ... τ-out1) (~→ τ-in2 ... τ-out2))
|
|
#:when (stx-length=? #'(τ-in1 ...) #'(τ-in2 ...))
|
|
(and (stx-andmap <: #'(τ-in2 ...) #'(τ-in1 ...))
|
|
(<: #'τ-out1 #'τ-out2))]
|
|
[(~Discard _)
|
|
#t]
|
|
;; TODO: clauses for Roles, and so on
|
|
;; should probably put this first.
|
|
[_ (type=? t1 t2)]))
|
|
|
|
;; Flat-Type Flat-Type -> Type
|
|
(define-for-syntax (∩ t1 t2)
|
|
(unless (and (flat-type? t1) (flat-type? t2))
|
|
(error '∩ "expected two flat-types"))
|
|
(syntax-parse #`(#,t1 #,t2)
|
|
[(_ ~★/t)
|
|
t1]
|
|
[(~★/t _)
|
|
t2]
|
|
[(_ _)
|
|
#:when (type=? t1 t2)
|
|
t1]
|
|
[((~U* τ1:type ...) _)
|
|
(type-eval #`(U #,@(stx-map (lambda (t) (∩ t t2)) #'(τ1 ...))))]
|
|
[(_ (~U* τ2:type ...))
|
|
(type-eval #`(U #,@(stx-map (lambda (t) (∩ t1 t)) #'(τ2 ...))))]
|
|
[((~AssertionSet τ1) (~AssertionSet τ2))
|
|
#:with τ12 (∩ #'τ1 #'τ2)
|
|
(type-eval #'(AssertionSet τ12))]
|
|
[((~Set τ1) (~Set τ2))
|
|
#:with τ12 (∩ #'τ1 #'τ2)
|
|
(type-eval #'(Set τ12))]
|
|
[((~Patch τ11 τ12) (~Patch τ21 τ22))
|
|
#:with τ1 (∩ #'τ11 #'τ12)
|
|
#:with τ2 (∩ #'τ21 #'τ22)
|
|
(type-eval #'(Patch τ1 τ2))]
|
|
;; all of these fail-when/unless clauses are meant to cause this through to
|
|
;; the last case and result in ⊥.
|
|
;; Also, using <: is OK, even though <: refers to ∩, because <:'s use of ∩ is only
|
|
;; in the Actor case.
|
|
[((~Tuple τ1:type ...) (~Tuple τ2:type ...))
|
|
#:fail-unless (stx-length=? #'(τ1 ...) #'(τ2 ...)) #f
|
|
#:with (τ ...) (stx-map ∩ #'(τ1 ...) #'(τ2 ...))
|
|
;; I don't think stx-ormap is part of the documented api of turnstile *shrug*
|
|
#:fail-when (stx-ormap (lambda (t) (<: t (type-eval #'(U)))) #'(τ ...)) #f
|
|
(type-eval #'(Tuple τ ...))]
|
|
[((~constructor-type tag1 τ1:type ...) (~constructor-type tag2 τ2:type ...))
|
|
#:when (tags-equal? #'tag1 #'tag2)
|
|
#:with (τ ...) (stx-map ∩ #'(τ1 ...) #'(τ2 ...))
|
|
#:fail-when (stx-ormap (lambda (t) (<: t (type-eval #'(U)))) #'(τ ...)) #f
|
|
(make-cons-type t1 #'(τ ...))]
|
|
;; these three are just the same :(
|
|
[((~Observe τ1:type) (~Observe τ2:type))
|
|
#:with τ (∩ #'τ1 #'τ2)
|
|
#:fail-when (<: #'τ (type-eval #'(U))) #f
|
|
(type-eval #'(Observe τ))]
|
|
[((~Inbound τ1:type) (~Inbound τ2:type))
|
|
#:with τ (∩ #'τ1 #'τ2)
|
|
#:fail-when (<: #'τ (type-eval #'(U))) #f
|
|
(type-eval #'(Inbound τ))]
|
|
[((~Outbound τ1:type) (~Outbound τ2:type))
|
|
#:with τ (∩ #'τ1 #'τ2)
|
|
#:fail-when (<: #'τ (type-eval #'(U))) #f
|
|
(type-eval #'(Outbound τ))]
|
|
[_ (type-eval #'(U))]))
|
|
|
|
;; Type Type -> Bool
|
|
;; first type is the contents of the set
|
|
;; second type is the type of a pattern
|
|
(define-for-syntax (project-safe? t1 t2)
|
|
(syntax-parse #`(#,t1 #,t2)
|
|
[(_ (~Bind τ2:type))
|
|
(and (finite? t1) (<: t1 #'τ2))]
|
|
[(_ ~Discard)
|
|
#t]
|
|
[(_ ~★/t)
|
|
#t]
|
|
[((~U* τ1:type ...) _)
|
|
(stx-andmap (lambda (t) (project-safe? t t2)) #'(τ1 ...))]
|
|
[(_ (~U* τ2:type ...))
|
|
(stx-andmap (lambda (t) (project-safe? t1 t)) #'(τ2 ...))]
|
|
[((~Tuple τ1:type ...) (~Tuple τ2:type ...))
|
|
#:when (overlap? t1 t2)
|
|
(stx-andmap project-safe? #'(τ1 ...) #'(τ2 ...))]
|
|
[((~constructor-type _ τ1:type ...) (~constructor-type _ τ2:type ...))
|
|
#:when (overlap? t1 t2)
|
|
(stx-andmap project-safe? #'(τ1 ...) #'(τ2 ...))]
|
|
[((~Observe τ1:type) (~Observe τ2:type))
|
|
(project-safe? #'τ1 #'τ2)]
|
|
[((~Inbound τ1:type) (~Inbound τ2:type))
|
|
(project-safe? #'τ1 #'τ2)]
|
|
[((~Outbound τ1:type) (~Outbound τ2:type))
|
|
(project-safe? #'τ1 #'τ2)]
|
|
[_ #t]))
|
|
|
|
;; AssertionType PatternType -> Bool
|
|
;; Is it possible for things of these two types to match each other?
|
|
;; Flattish-Type = Flat-Types + ★/t, Bind, Discard (assertion and pattern types)
|
|
(define-for-syntax (overlap? t1 t2)
|
|
(syntax-parse #`(#,t1 #,t2)
|
|
[(~★/t _) #t]
|
|
[(_ (~Bind _)) #t]
|
|
[(_ ~Discard) #t]
|
|
[(_ ~★/t) #t]
|
|
[((~U* τ1:type ...) _)
|
|
(stx-ormap (lambda (t) (overlap? t t2)) #'(τ1 ...))]
|
|
[(_ (~U* τ2:type ...))
|
|
(stx-ormap (lambda (t) (overlap? t1 t)) #'(τ2 ...))]
|
|
[((~List _) (~List _))
|
|
;; share the empty list
|
|
#t]
|
|
[((~Tuple τ1:type ...) (~Tuple τ2:type ...))
|
|
(and (stx-length=? #'(τ1 ...) #'(τ2 ...))
|
|
(stx-andmap overlap? #'(τ1 ...) #'(τ2 ...)))]
|
|
[((~constructor-type t1 τ1:type ...) (~constructor-type t2 τ2:type ...))
|
|
(and (tags-equal? #'t1 #'t2)
|
|
(stx-andmap overlap? #'(τ1 ...) #'(τ2 ...)))]
|
|
[((~Observe τ1:type) (~Observe τ2:type))
|
|
(overlap? #'τ1 #'τ2)]
|
|
[((~Inbound τ1:type) (~Inbound τ2:type))
|
|
(overlap? #'τ1 #'τ2)]
|
|
[((~Outbound τ1:type) (~Outbound τ2:type))
|
|
(overlap? #'τ1 #'τ2)]
|
|
[_ (<: t1 t2)]))
|
|
|
|
;; Flattish-Type -> Bool
|
|
(define-for-syntax (finite? t)
|
|
(syntax-parse t
|
|
[~★/t #f]
|
|
[(~U* τ:type ...)
|
|
(stx-andmap finite? #'(τ ...))]
|
|
[(~Tuple τ:type ...)
|
|
(stx-andmap finite? #'(τ ...))]
|
|
[(~constructor-type _ τ:type ...)
|
|
(stx-andmap finite? #'(τ ...))]
|
|
[(~Observe τ:type)
|
|
(finite? #'τ)]
|
|
[(~Inbound τ:type)
|
|
(finite? #'τ)]
|
|
[(~Outbound τ:type)
|
|
(finite? #'τ)]
|
|
[(~Set τ:type)
|
|
(finite? #'τ)]
|
|
[_ #t]))
|
|
|
|
;; !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
|
;; MODIFYING GLOBAL TYPECHECKING STATE!!!!!
|
|
;; !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
|
|
|
|
(begin-for-syntax
|
|
(current-typecheck-relation <:))
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Effect Checking
|
|
|
|
;; DesugaredSyntax EffectName -> (Syntaxof Effect ...)
|
|
(define-for-syntax (get-effect e- eff)
|
|
(or (syntax-property e- eff) #'()))
|
|
|
|
;; DesugaredSyntax EffectName -> Bool
|
|
(define-for-syntax (effect-free? e- eff)
|
|
(define prop (syntax-property e- eff))
|
|
(or (false? prop) (stx-null? prop)))
|
|
|
|
;; DesugaredSyntax -> Bool
|
|
(define-for-syntax (pure? e-)
|
|
(for/and ([key (in-list '(ep f s))])
|
|
(effect-free? e- key)))
|
|
|
|
;; (SyntaxOf DesugaredSyntax ...) -> Bool
|
|
(define-for-syntax (all-pure? es)
|
|
(stx-andmap pure? es))
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Core forms
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(define-for-syntax (int-def-ctx-bind-type-rename x x- t ctx)
|
|
(syntax-local-bind-syntaxes (list x-) #f ctx)
|
|
(syntax-local-bind-syntaxes (list x)
|
|
#`(make-rename-transformer
|
|
(add-orig (assign-type #'#,x- #'#,t #:wrap? #f) #'#,x))
|
|
ctx))
|
|
|
|
(define-for-syntax (add-bindings-to-ctx e- def-ctx)
|
|
(syntax-parse e-
|
|
#:literals (erased field/intermediate define/intermediate begin-)
|
|
[(erased (field/intermediate (x:id x-:id τ e-) ...))
|
|
(for ([orig-name (in-syntax #'(x ... ))]
|
|
[new-name (in-syntax #'(x- ...))]
|
|
[field-ty (in-syntax #'(τ ...))])
|
|
(int-def-ctx-bind-type-rename orig-name new-name field-ty def-ctx))]
|
|
[(erased (define/intermediate x:id x-:id τ e-))
|
|
(int-def-ctx-bind-type-rename #'x #'x- #'τ def-ctx)]
|
|
#;[(erased (begin- e ...))
|
|
(for ([e (in-syntax #'(e ...))])
|
|
(add-bindings-to-ctx e def-ctx))]
|
|
[_ (void)]))
|
|
|
|
;; -> (Values e-... (Listof Type) (Listof EndpointEffects) (Listof FacetEffects) (Listof SpawnEffects))
|
|
;; recognizes local binding forms
|
|
;; (field/intermediate [x e] ...
|
|
;; (define/intermediate x x- τ e)
|
|
(define-for-syntax (walk/bind e...
|
|
[def-ctx (syntax-local-make-definition-context #f #f)]
|
|
[unique (gensym 'walk/bind)])
|
|
(define-values (rev-e-... rev-τ... ep-effects facet-effects spawn-effects)
|
|
(let loop ([e... (syntax->list e...)]
|
|
[rev-e-... '()]
|
|
[rev-τ... '()]
|
|
[ep-effects '()]
|
|
[facet-effects '()]
|
|
[spawn-effects '()])
|
|
(match e...
|
|
['()
|
|
(values rev-e-... rev-τ... ep-effects facet-effects spawn-effects)]
|
|
[(cons e more)
|
|
(define e- (local-expand e (list unique) (list #'erased #'begin) def-ctx))
|
|
(syntax-parse e-
|
|
#:literals (begin)
|
|
[(begin e ...)
|
|
(loop (append (syntax->list #'(e ...)) more)
|
|
rev-e-...
|
|
rev-τ...
|
|
ep-effects
|
|
facet-effects
|
|
spawn-effects)]
|
|
[_
|
|
(define τ (syntax-property e- ':))
|
|
(define-values (ep-effs f-effs s-effs)
|
|
(values (syntax->list (get-effect e- 'ep))
|
|
(syntax->list (get-effect e- 'f))
|
|
(syntax->list (get-effect e- 's))))
|
|
(add-bindings-to-ctx e- def-ctx)
|
|
(loop more
|
|
(cons e- rev-e-...)
|
|
(cons τ rev-τ...)
|
|
(append ep-effs ep-effects)
|
|
(append f-effs facet-effects)
|
|
(append s-effs spawn-effects))])])))
|
|
(values (reverse rev-e-...)
|
|
(reverse rev-τ...)
|
|
ep-effects
|
|
facet-effects
|
|
spawn-effects))
|
|
|
|
(define-typed-syntax (start-facet name:id ep ...+) ≫
|
|
#:with name- (syntax-local-identifier-as-binding (syntax-local-introduce (generate-temporary #'name)))
|
|
#:with name+ (syntax-local-identifier-as-binding #'name)
|
|
#:with facet-name-ty (type-eval #'FacetName)
|
|
#:do [(define ctx (syntax-local-make-definition-context))
|
|
(define unique (gensym 'start-facet))
|
|
(define name-- (internal-definition-context-introduce ctx #'name- 'add))
|
|
(int-def-ctx-bind-type-rename #'name+ #'name- #'facet-name-ty ctx)
|
|
(define-values (ep-... τ... ep-effects facet-effects spawn-effects)
|
|
(walk/bind #'(ep ...) ctx unique))
|
|
(unless (and (stx-null? facet-effects) (stx-null? spawn-effects))
|
|
(type-error #:src #'(ep ...) #:msg "only endpoint effects allowed"))]
|
|
#:with ((~or (~and τ-a (~Shares _))
|
|
(~and τ-r (~Reacts _ ...))
|
|
~MakesField)
|
|
...)
|
|
ep-effects
|
|
#:with τ (type-eval #`(Role (#,name--)
|
|
τ-a ...
|
|
τ-r ...))
|
|
--------------------------------------------------------------
|
|
[⊢ (syndicate:react (let- ([#,name-- (syndicate:current-facet-id)])
|
|
#,@ep-...))
|
|
(⇒ : ★/t)
|
|
(⇒ f (τ))])
|
|
|
|
(define-typed-syntax (field [x:id τ-f:type e:expr] ...) ≫
|
|
#:fail-unless (stx-andmap flat-type? #'(τ-f ...)) "keep your uppity data outta my fields"
|
|
[⊢ e ≫ e- (⇐ : τ-f)] ...
|
|
#:fail-unless (stx-andmap pure? #'(e- ...)) "field initializers not allowed to have effects"
|
|
#:with (x- ...) (generate-temporaries #'(x ...))
|
|
#:with (τ ...) (stx-map type-eval #'((Field τ-f.norm) ...))
|
|
#:with MF (type-eval #'MakesField)
|
|
----------------------------------------------------------------------
|
|
[⊢ (field/intermediate [x x- τ e-] ...)
|
|
(⇒ : ★/t)
|
|
(⇒ ep (MF))])
|
|
|
|
(define-syntax (field/intermediate stx)
|
|
(syntax-parse stx
|
|
[(_ [x:id x-:id τ e-] ...)
|
|
#'(syndicate:field [x- e-] ...)]))
|
|
|
|
(define-typed-syntax (assert e:expr) ≫
|
|
[⊢ e ≫ e- (⇒ : τ)]
|
|
#:fail-unless (pure? #'e-) "expression not allowed to have effects"
|
|
#:with τs (type-eval #'(Shares τ))
|
|
-------------------------------------
|
|
[⊢ (syndicate:assert e-) (⇒ : ★/t)
|
|
(⇒ ep (τs))])
|
|
|
|
(define-typed-syntax (stop facet-name:id cont ...) ≫
|
|
[⊢ facet-name ≫ facet-name- (⇐ : FacetName)]
|
|
[⊢ (begin #f cont ...) ≫ cont- (⇒ ep (~effs)) (⇒ s (~effs)) (⇒ f (~effs τ-f ...))]
|
|
#:with τ (mk-Stop- #`(facet-name- τ-f ...))
|
|
---------------------------------------------------------------------------------
|
|
[⊢ (syndicate:stop-facet facet-name- cont-) (⇒ : ★/t)
|
|
(⇒ f (τ))])
|
|
|
|
(begin-for-syntax
|
|
(define-syntax-class asserted-or-retracted
|
|
#:datum-literals (asserted retracted)
|
|
(pattern (~or (~and asserted
|
|
(~bind [syndicate-kw #'syndicate:asserted]
|
|
[react-con #'Know]))
|
|
(~and retracted
|
|
(~bind [syndicate-kw #'syndicate:retracted]
|
|
[react-con #'¬Know]))))))
|
|
|
|
(define-typed-syntax on
|
|
[(on (~literal start) s ...) ≫
|
|
[⊢ (begin s ...) ≫ s- (⇒ ep (~effs))
|
|
(⇒ f (~effs τ-f ...))
|
|
(⇒ s (~effs τ-s ...))]
|
|
#:with τ-r (type-eval #'(Reacts OnStart τ-f ... τ-s ...))
|
|
-----------------------------------
|
|
[⊢ (syndicate:on-start s-) (⇒ : ★/t)
|
|
(⇒ ep (τ-r))]]
|
|
[(on (~literal stop) s ...) ≫
|
|
[⊢ (begin s ...) ≫ s- (⇒ ep (~effs))
|
|
(⇒ f (~effs τ-f ...))
|
|
(⇒ s (~effs τ-s ...))]
|
|
#:with τ-r (type-eval #'(Reacts OnStop τ-f ... τ-s ...))
|
|
-----------------------------------
|
|
[⊢ (syndicate:on-stop s-) (⇒ : ★/t)
|
|
(⇒ ep (τ-r))]]
|
|
[(on (a/r:asserted-or-retracted p) s ...) ≫
|
|
[⊢ p ≫ p-- (⇒ : τp)]
|
|
#:fail-unless (pure? #'p--) "pattern not allowed to have effects"
|
|
#:with ([x:id τ:type] ...) (pat-bindings #'p)
|
|
[[x ≫ x- : τ] ... ⊢ (begin s ...) ≫ s-
|
|
(⇒ ep (~effs))
|
|
(⇒ f (~effs τ-f ...))
|
|
(⇒ s (~effs τ-s ...))]
|
|
#:with p- (substs #'(x- ...) #'(x ...) (compile-syndicate-pattern #'p))
|
|
#:with τ-r (type-eval #'(Reacts (a/r.react-con τp) τ-f ... τ-s ...))
|
|
-----------------------------------
|
|
[⊢ (syndicate:on (a/r.syndicate-kw p-)
|
|
s-)
|
|
(⇒ : ★/t)
|
|
(⇒ ep (τ-r))]])
|
|
|
|
;; pat -> ([Id Type] ...)
|
|
(define-for-syntax (pat-bindings stx)
|
|
(syntax-parse stx
|
|
#:datum-literals (bind tuple)
|
|
[(bind x:id τ:type)
|
|
#'([x τ])]
|
|
[(tuple p ...)
|
|
#:with (([x:id τ:type] ...) ...) (stx-map pat-bindings #'(p ...))
|
|
#'([x τ] ... ...)]
|
|
[(k:kons1 p)
|
|
(pat-bindings #'p)]
|
|
[(~constructor-exp cons p ...)
|
|
#:with (([x:id τ:type] ...) ...) (stx-map pat-bindings #'(p ...))
|
|
#'([x τ] ... ...)]
|
|
[_
|
|
#'()]))
|
|
|
|
;; TODO - figure out why this needs different list identifiers
|
|
(define-for-syntax (compile-pattern pat list-binding bind-id-transformer exp-transformer)
|
|
(define (l-e stx) (local-expand stx 'expression '()))
|
|
(let loop ([pat pat])
|
|
(syntax-parse pat
|
|
#:datum-literals (tuple discard bind)
|
|
[(tuple p ...)
|
|
#`(#,list-binding 'tuple #,@(stx-map loop #'(p ...)))]
|
|
[(k:kons1 p)
|
|
#`(#,(kons1->constructor #'k) #,(loop #'p))]
|
|
[(bind x:id τ:type)
|
|
(bind-id-transformer #'x)]
|
|
[discard
|
|
#'_]
|
|
[(~constructor-exp ctor p ...)
|
|
(define/with-syntax uctor (untyped-ctor #'ctor))
|
|
#`(uctor #,@(stx-map loop #'(p ...)))]
|
|
[_
|
|
;; local expanding "expression-y" syntax allows variable references to transform
|
|
;; according to the mappings set up by turnstile.
|
|
(exp-transformer (l-e pat))])))
|
|
|
|
(define-for-syntax (compile-syndicate-pattern pat)
|
|
(compile-pattern pat
|
|
#'list-
|
|
(lambda (id) #`($ #,id))
|
|
identity))
|
|
|
|
(define-for-syntax (compile-match-pattern pat)
|
|
(compile-pattern pat
|
|
#'list
|
|
identity
|
|
(lambda (exp) #`(==- #,exp))))
|
|
|
|
(define-typed-syntax (spawn τ-c:type s) ≫
|
|
#:fail-unless (flat-type? #'τ-c.norm) "Communication type must be first-order"
|
|
;; TODO: check that each τ-f is a Role
|
|
[⊢ s ≫ s- (⇒ ep (~effs)) (⇒ s (~effs)) (⇒ f (~effs τ-f ...))]
|
|
;; TODO: s shouldn't refer to facets or fields!
|
|
#:with (τ-i τ-o τ-a) (analyze-roles #'(τ-f ...))
|
|
#:fail-unless (<: #'τ-o #'τ-c.norm)
|
|
(format "Output ~a not valid in dataspace ~a" (type->str #'τ-o) (type->str #'τ-c.norm))
|
|
#:fail-unless (<: #'τ-a
|
|
(type-eval #'(Actor τ-c.norm)))
|
|
"Spawned actors not valid in dataspace"
|
|
#:fail-unless (project-safe? (∩ (strip-? #'τ-o) #'τ-c.norm)
|
|
#'τ-i)
|
|
"Not prepared to handle all inputs"
|
|
#:with τ-final (type-eval #'(Actor τ-c.norm))
|
|
--------------------------------------------------------------------------------------------
|
|
[⊢ (syndicate:spawn (syndicate:on-start s-)) (⇒ : ★/t)
|
|
(⇒ s (τ-final))])
|
|
|
|
(define-typed-syntax (dataspace τ-c:type s ...) ≫
|
|
#:fail-unless (flat-type? #'τ-c.norm) "Communication type must be first-order"
|
|
[⊢ s ≫ s- (⇒ ep (~effs)) (⇒ s (~effs τ-s ...)) (⇒ f (~effs))] ...
|
|
#:with τ-actor (type-eval #'(Actor τ-c.norm))
|
|
#:fail-unless (stx-andmap (lambda (t) (<: t #'τ-actor)) #'(τ-s ... ...))
|
|
"Not all actors conform to communication type"
|
|
#:with τ-ds-i (strip-inbound #'τ-c.norm)
|
|
#:with τ-ds-o (strip-outbound #'τ-c.norm)
|
|
#:with τ-relay (relay-interests #'τ-c.norm)
|
|
-----------------------------------------------------------------------------------
|
|
[⊢ (syndicate:dataspace s- ...) (⇒ : ★/t)
|
|
(⇒ s ((Actor (U τ-ds-i τ-ds-o τ-relay))))])
|
|
|
|
(define-typed-syntax (set! x:id e:expr) ≫
|
|
[⊢ e ≫ e- (⇒ : τ)]
|
|
#:fail-unless (pure? #'e-) "expression not allowed to have effects"
|
|
[⊢ x ≫ x- (⇒ : (~Field τ-x:type))]
|
|
#:fail-unless (<: #'τ #'τ-x) "Ill-typed field write"
|
|
----------------------------------------------------
|
|
[⊢ (x- e-) (⇒ : ★/t)])
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Derived Forms
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(define-typed-syntax (during p s ...) ≫
|
|
#:with inst-p (instantiate-pattern #'p)
|
|
----------------------------------------
|
|
[≻ (on (asserted p)
|
|
(start-facet during-inner
|
|
(on (retracted inst-p)
|
|
(stop during-inner))
|
|
s ...))])
|
|
|
|
;; TODO - reconcile this with `compile-pattern`
|
|
(define-for-syntax (instantiate-pattern pat)
|
|
(let loop ([pat pat])
|
|
(syntax-parse pat
|
|
#:datum-literals (tuple discard bind)
|
|
[(tuple p ...)
|
|
#`(tuple #,@(stx-map loop #'(p ...)))]
|
|
[(k:kons1 p)
|
|
#`(k #,(loop #'p))]
|
|
[(bind x:id τ)
|
|
#'x]
|
|
;; not sure about this
|
|
[discard
|
|
#'discard]
|
|
[(~constructor-exp ctor p ...)
|
|
(define/with-syntax uctor (untyped-ctor #'ctor))
|
|
#`(ctor #,@(stx-map loop #'(p ...)))]
|
|
[_
|
|
pat])))
|
|
|
|
(define-typed-syntax (define/query-value x:id e0 p e) ≫
|
|
[⊢ e0 ≫ e0- (⇒ : τ)]
|
|
#:fail-unless (pure? #'e0-) "expression must be pure"
|
|
----------------------------------------
|
|
[≻ (begin (field [x τ e0-])
|
|
(on (asserted p)
|
|
(set! x e))
|
|
(on (retracted p)
|
|
(set! x e0-)))])
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Expressions
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(define-typed-syntax (ref x:id) ≫
|
|
[⊢ x ≫ x- ⇒ (~Field τ)]
|
|
------------------------
|
|
[⊢ (x-) (⇒ : τ)])
|
|
|
|
(define-typed-syntax (lambda ([x:id (~optional (~datum :)) τ:type] ...) body ...+) ≫
|
|
[[x ≫ x- : τ] ... ⊢ (begin body ...) ≫ body- (⇒ : τ-e)
|
|
(⇒ ep (~effs τ-ep ...))
|
|
(⇒ s (~effs τ-s ...))
|
|
(⇒ f (~effs τ-f ...))]
|
|
----------------------------------------
|
|
[⊢ (lambda- (x- ...) body-) (⇒ : (→ τ ... (Computation (Value τ-e)
|
|
(EndPoints τ-ep ...)
|
|
(Roles τ-f ...)
|
|
(Spawns τ-s ...))))])
|
|
|
|
(define-typed-syntax (typed-app e_fn e_arg ...) ≫
|
|
[⊢ e_fn ≫ e_fn- (⇒ : (~→ τ_in ... (~Computation (~Value τ-out)
|
|
(~Endpoints τ-ep ...)
|
|
(~Roles τ-f ...)
|
|
(~Spawns τ-s ...))))]
|
|
#:fail-unless (pure? #'e_fn-) "expression not allowed to have effects"
|
|
#:fail-unless (stx-length=? #'[τ_in ...] #'[e_arg ...])
|
|
(num-args-fail-msg #'e_fn #'[τ_in ...] #'[e_arg ...])
|
|
[⊢ e_arg ≫ e_arg- (⇐ : τ_in)] ...
|
|
#:fail-unless (stx-andmap pure? #'(e_arg- ...)) "expressions not allowed to have effects"
|
|
------------------------------------------------------------------------
|
|
[⊢ (#%app- e_fn- e_arg- ...) (⇒ : τ-out)
|
|
(⇒ ep (τ-ep ...))
|
|
(⇒ s (τ-s ...))
|
|
(⇒ f (τ-f ...))])
|
|
|
|
(define-typed-syntax (tuple e:expr ...) ≫
|
|
[⊢ e ≫ e- (⇒ : τ)] ...
|
|
#:fail-unless (stx-andmap pure? #'(e- ...)) "expressions not allowed to have effects"
|
|
-----------------------
|
|
[⊢ (list- 'tuple e- ...) (⇒ : (Tuple τ ...))])
|
|
|
|
(define-typed-syntax (select n:nat e:expr) ≫
|
|
[⊢ e ≫ e- (⇒ : (~Tuple τ ...))]
|
|
#:fail-unless (pure? #'e-) "expression not allowed to have effects"
|
|
#:do [(define i (syntax->datum #'n))]
|
|
#:fail-unless (< i (stx-length #'(τ ...))) "index out of range"
|
|
#:with τr (list-ref (stx->list #'(τ ...)) i)
|
|
--------------------------------------------------------------
|
|
[⊢ (tuple-select n e-) (⇒ : τr)])
|
|
|
|
(define- (tuple-select n t)
|
|
(list-ref- t (add1 n)))
|
|
|
|
;; it would be nice to abstract over these three
|
|
(define-typed-syntax (observe e:expr) ≫
|
|
[⊢ e ≫ e- (⇒ : τ)]
|
|
#:fail-unless (pure? #'e-) "expression not allowed to have effects"
|
|
---------------------------------------------------------------------------
|
|
[⊢ (syndicate:observe e-) (⇒ : (Observe τ))])
|
|
|
|
(define-typed-syntax (inbound e:expr) ≫
|
|
[⊢ e ≫ e- (⇒ : τ)]
|
|
#:fail-unless (pure? #'e-) "expression not allowed to have effects"
|
|
---------------------------------------------------------------------------
|
|
[⊢ (syndicate:inbound e-) (⇒ : (Inbound τ))])
|
|
|
|
(define-typed-syntax (outbound e:expr) ≫
|
|
[⊢ e ≫ e- (⇒ : τ)]
|
|
#:fail-unless (pure? #'e-) "expression not allowed to have effects"
|
|
---------------------------------------------------------------------------
|
|
[⊢ (syndicate:outbound e-) (⇒ : (Outbound τ))])
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Patterns
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(define-typed-syntax (bind x:id τ:type) ≫
|
|
----------------------------------------
|
|
[⊢ (error- 'bind "escaped") (⇒ : (Bind τ))])
|
|
|
|
(define-typed-syntax discard
|
|
[_ ≫
|
|
--------------------
|
|
[⊢ (error- 'discard "escaped") (⇒ : Discard)]])
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Core-ish forms
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
;; copied from stlc
|
|
(define-typed-syntax (ann e (~optional (~datum :)) τ:type) ≫
|
|
[⊢ e ≫ e- (⇐ : τ.norm)]
|
|
#:fail-unless (pure? #'e-) "expression must be pure"
|
|
------------------------------------------------
|
|
[⊢ e- (⇒ : τ.norm) ])
|
|
|
|
(define-syntax (define/intermediate stx)
|
|
(syntax-parse stx
|
|
[(_ x:id x-:id τ e)
|
|
#'(define- x- e)]))
|
|
|
|
;; copied from ext-stlc
|
|
(define-typed-syntax define
|
|
[(_ x:id (~datum :) τ:type e:expr) ≫
|
|
[⊢ e ≫ e- ⇐ τ.norm]
|
|
#:fail-unless (pure? #'e-) "expression must be pure"
|
|
#:with x- (generate-temporary #'x)
|
|
--------
|
|
[⊢ (define/intermediate x x- τ.norm e-) (⇒ : ★/t)]]
|
|
[(_ x:id e) ≫
|
|
;This won't work with mutually recursive definitions
|
|
[⊢ e ≫ e- ⇒ τ]
|
|
#:fail-unless (pure? #'e-) "expression must be pure"
|
|
#:with x- (generate-temporary #'x)
|
|
--------
|
|
[⊢ (define/intermediate x x- τ e-) (⇒ : ★/t)]]
|
|
[(_ (f [x (~optional (~datum :)) ty] ...
|
|
(~or (~datum →) (~datum ->)) ty_out)
|
|
e ...+) ≫
|
|
[⊢ (lambda ([x : ty] ...) (begin e ...)) ≫ e- (⇒ : (~and fun-ty
|
|
(~Computation (~Value τ-v)
|
|
_ ...)))]
|
|
#:fail-unless (<: #'τ-v #'ty_out)
|
|
(format "expected different return type, got ~a" (type->str #'τ-v))
|
|
#:with f- (add-orig (generate-temporary #'f) #'f)
|
|
--------
|
|
[⊢ (define/intermediate f f- fun-ty e-) (⇒ : ★/t)]])
|
|
|
|
;; copied from ext-stlc
|
|
(define-typed-syntax if
|
|
[(_ e_tst e1 e2) ⇐ τ-expected ≫
|
|
[⊢ e_tst ≫ e_tst- ⇒ _] ; Any non-false value is truthy.
|
|
#:fail-unless (pure? #'e_tst-) "expression must be pure"
|
|
[⊢ e1 ≫ e1- (⇐ : τ-expected)
|
|
(⇒ ep (~effs eps1 ...)) (⇒ f (~effs fs1 ...)) (⇒ s (~effs ss1 ...))]
|
|
[⊢ e2 ≫ e2- (⇐ : τ-expected)
|
|
(⇒ ep (~effs eps2 ...)) (⇒ f (~effs fs2 ...)) (⇒ s (~effs ss2 ...))]
|
|
--------
|
|
[⊢ (if- e_tst- e1- e2-)
|
|
(⇒ ep (eps1 ... eps2 ...))
|
|
(⇒ f (fs1 ... fs2 ...))
|
|
(⇒ s (ss1 ... ss2 ...))]]
|
|
[(_ e_tst e1 e2) ≫
|
|
[⊢ e_tst ≫ e_tst- ⇒ _] ; Any non-false value is truthy.
|
|
#:fail-unless (pure? #'e_tst-) "expression must be pure"
|
|
[⊢ e1 ≫ e1- (⇒ : τ1)
|
|
(⇒ ep (~effs eps1 ...)) (⇒ f (~effs fs1 ...)) (⇒ s (~effs ss1 ...))]
|
|
[⊢ e2 ≫ e2- (⇒ : τ2)
|
|
(⇒ ep (~effs eps2 ...)) (⇒ f (~effs fs2 ...)) (⇒ s (~effs ss2 ...))]
|
|
#:with τ (type-eval #'(U τ1 τ2))
|
|
--------
|
|
[⊢ (if- e_tst- e1- e2-) (⇒ : τ)
|
|
(⇒ ep (eps1 ... eps2 ...))
|
|
(⇒ f (fs1 ... fs2 ...))
|
|
(⇒ s (ss1 ... ss2 ...))]])
|
|
|
|
;; copied from ext-stlc
|
|
(define-typed-syntax begin
|
|
[(_ e_unit ... e) ≫
|
|
#:do [(define-values (e-... τ... ep-effs f-effs s-effs) (walk/bind #'(e_unit ... e)))]
|
|
#:with τ (last τ...)
|
|
--------
|
|
[⊢ (begin- #,@e-...) (⇒ : τ)
|
|
(⇒ ep (#,@ep-effs))
|
|
(⇒ f (#,@f-effs))
|
|
(⇒ s (#,@s-effs))]])
|
|
|
|
;; copied from ext-stlc
|
|
(define-typed-syntax let
|
|
[(_ ([x e] ...) e_body ...) ⇐ τ_expected ≫
|
|
[⊢ e ≫ e- ⇒ : τ_x] ...
|
|
#:fail-unless (stx-andmap pure? #'(e- ...)) "expressions must be pure"
|
|
[[x ≫ x- : τ_x] ... ⊢ (begin e_body ...) ≫ e_body- (⇐ : τ_expected)
|
|
(⇒ ep (~effs eps ...))
|
|
(⇒ f (~effs fs ...))
|
|
(⇒ s (~effs ss ...))]
|
|
----------------------------------------------------------
|
|
[⊢ (let- ([x- e-] ...) e_body-)
|
|
(⇒ ep (eps ...))
|
|
(⇒ f (fs ...))
|
|
(⇒ s (ss ...))]]
|
|
[(_ ([x e] ...) e_body ...) ≫
|
|
[⊢ e ≫ e- ⇒ : τ_x] ...
|
|
#:fail-unless (stx-andmap pure? #'(e- ...)) "expressions must be pure"
|
|
[[x ≫ x- : τ_x] ... ⊢ (begin e_body ...) ≫ e_body- (⇒ : τ_body)
|
|
(⇒ ep (~effs eps ...))
|
|
(⇒ f (~effs fs ...))
|
|
(⇒ s (~effs ss ...))]
|
|
----------------------------------------------------------
|
|
[⊢ (let- ([x- e-] ...) e_body-) (⇒ : τ_body)
|
|
(⇒ ep (eps ...))
|
|
(⇒ f (fs ...))
|
|
(⇒ s (ss ...))]])
|
|
|
|
;; copied from ext-stlc
|
|
(define-typed-syntax let*
|
|
[(_ () e_body ...) ≫
|
|
--------
|
|
[≻ (begin e_body ...)]]
|
|
[(_ ([x e] [x_rst e_rst] ...) e_body ...) ≫
|
|
--------
|
|
[≻ (let ([x e]) (let* ([x_rst e_rst] ...) e_body ...))]])
|
|
|
|
(define-typed-syntax (cond [pred:expr s ...+] ...+) ≫
|
|
[⊢ pred ≫ pred- (⇐ : Bool)] ...
|
|
#:fail-unless (stx-andmap pure? #'(pred- ...)) "predicates must be pure"
|
|
[⊢ (begin s ...) ≫ s- (⇒ : τ-s)
|
|
(⇒ ep (~effs eps ...))
|
|
(⇒ f (~effs fs ...))
|
|
(⇒ s (~effs ss ...))] ...
|
|
------------------------------------------------
|
|
[⊢ (cond- [pred- s-] ...) (⇒ : (U τ-s ...))
|
|
(⇒ ep (eps ... ...))
|
|
(⇒ f (fs ... ...))
|
|
(⇒ s (ss ... ...))])
|
|
|
|
(define-typed-syntax (match e [p s ...+] ...+) ≫
|
|
[⊢ e ≫ e- (⇒ : τ-e)]
|
|
#:fail-unless (pure? #'e-) "expression must be pure"
|
|
#:with (([x τ] ...) ...) (stx-map pat-bindings #'(p ...))
|
|
[[x ≫ x- : τ] ... ⊢ (begin s ...) ≫ s- (⇒ : τ-s)
|
|
(⇒ ep (~effs eps ...))
|
|
(⇒ f (~effs fs ...))
|
|
(⇒ s (~effs ss ...))] ...
|
|
;; REALLY not sure how to handle p/p-/p.match-pattern,
|
|
;; particularly w.r.t. typed terms that appear in p.match-pattern
|
|
[⊢ p ≫ p-- ⇒ τ-p] ...
|
|
#:fail-unless (project-safe? #'τ-e (type-eval #'(U τ-p ...))) "possibly unsafe pattern match"
|
|
#:fail-unless (stx-andmap pure? #'(p-- ...)) "patterns must be pure"
|
|
#:with (p- ...) (stx-map (lambda (p x-s xs) (substs x-s xs (compile-match-pattern p)))
|
|
#'(p ...)
|
|
#'((x- ...) ...)
|
|
#'((x ...) ...))
|
|
--------------------------------------------------------------
|
|
[⊢ (match- e- [p- s-] ...
|
|
[_ (error "incomplete pattern match")])
|
|
(⇒ : (U τ-s ...))
|
|
(⇒ ep (eps ... ...))
|
|
(⇒ f (fs ... ...))
|
|
(⇒ s (ss ... ...))])
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Primitives
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
;; hmmm
|
|
(define-primop + (→ Int Int (Computation (Value Int) (Endpoints) (Roles) (Spawns))))
|
|
(define-primop - (→ Int Int (Computation (Value Int) (Endpoints) (Roles) (Spawns))))
|
|
(define-primop * (→ Int Int (Computation (Value Int) (Endpoints) (Roles) (Spawns))))
|
|
#;(define-primop and (→ Bool Bool Bool))
|
|
(define-primop or (→ Bool Bool (Computation (Value Bool) (Endpoints) (Roles) (Spawns))))
|
|
(define-primop not (→ Bool (Computation (Value Bool) (Endpoints) (Roles) (Spawns))))
|
|
(define-primop < (→ Int Int (Computation (Value Bool) (Endpoints) (Roles) (Spawns))))
|
|
(define-primop > (→ Int Int (Computation (Value Bool) (Endpoints) (Roles) (Spawns))))
|
|
(define-primop <= (→ Int Int (Computation (Value Bool) (Endpoints) (Roles) (Spawns))))
|
|
(define-primop >= (→ Int Int (Computation (Value Bool) (Endpoints) (Roles) (Spawns))))
|
|
(define-primop = (→ Int Int (Computation (Value Bool) (Endpoints) (Roles) (Spawns))))
|
|
|
|
(define-typed-syntax (/ e1 e2) ≫
|
|
[⊢ e1 ≫ e1- (⇐ : Int)]
|
|
[⊢ e2 ≫ e2- (⇐ : Int)]
|
|
#:fail-unless (pure? #'e1-) "expression not allowed to have effects"
|
|
#:fail-unless (pure? #'e2-) "expression not allowed to have effects"
|
|
------------------------
|
|
[⊢ (exact-truncate- (/- e1- e2-)) (⇒ : Int)])
|
|
|
|
;; for some reason defining `and` as a prim op doesn't work
|
|
(define-typed-syntax (and e ...) ≫
|
|
[⊢ e ≫ e- (⇐ : Bool)] ...
|
|
#:fail-unless (stx-andmap pure? #'(e- ...)) "expressions not allowed to have effects"
|
|
------------------------
|
|
[⊢ (and- e- ...) (⇒ : Bool)])
|
|
|
|
(define-typed-syntax (equal? e1:expr e2:expr) ≫
|
|
[⊢ e1 ≫ e1- (⇒ : τ1)]
|
|
#:fail-unless (flat-type? #'τ1)
|
|
(format "equality only available on flat data; got ~a" (type->str #'τ1))
|
|
[⊢ e2 ≫ e2- (⇐ : τ1)]
|
|
#:fail-unless (pure? #'e1-) "expression not allowed to have effects"
|
|
#:fail-unless (pure? #'e2-) "expression not allowed to have effects"
|
|
---------------------------------------------------------------------------
|
|
[⊢ (equal?- e1- e2-) (⇒ : Bool)])
|
|
|
|
(define-typed-syntax (displayln e:expr) ≫
|
|
[⊢ e ≫ e- (⇒ : τ)]
|
|
#:fail-unless (pure? #'e-) "expression not allowed to have effects"
|
|
---------------
|
|
[⊢ (displayln- e-) (⇒ : ★/t)])
|
|
|
|
(define-typed-syntax (printf e ...+) ≫
|
|
[⊢ e ≫ e- (⇒ : τ)] ...
|
|
#:fail-unless (stx-andmap pure? #'(e- ...)) "expression not allowed to have effects"
|
|
---------------
|
|
[⊢ (printf- e- ...) (⇒ : ★/t)])
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Basic Values
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(define-typed-syntax #%datum
|
|
[(_ . n:integer) ≫
|
|
----------------
|
|
[⊢ (#%datum- . n) (⇒ : Int)]]
|
|
[(_ . b:boolean) ≫
|
|
----------------
|
|
[⊢ (#%datum- . b) (⇒ : Bool)]]
|
|
[(_ . s:string) ≫
|
|
----------------
|
|
[⊢ (#%datum- . s) (⇒ : String)]])
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Utilities
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(define-typed-syntax (print-type e) ≫
|
|
[⊢ e ≫ e- (⇒ : τ) (⇒ ep (~effs eps ...)) (⇒ f (~effs fs ...)) (⇒ s (~effs ss ...))]
|
|
#:do [(displayln (type->str #'τ))]
|
|
----------------------------------
|
|
[⊢ e- (⇒ : τ) (⇒ ep (eps ...)) (⇒ f (fs ...)) (⇒ s (ss ...))])
|
|
|
|
(define-typed-syntax (print-role e) ≫
|
|
[⊢ e ≫ e- (⇒ : τ) (⇒ ep (~effs eps ...)) (⇒ f (~effs fs ...)) (⇒ s (~effs ss ...))]
|
|
#:do [(for ([r (in-syntax #'(fs ...))])
|
|
(displayln (type->str r)))]
|
|
----------------------------------
|
|
[⊢ e- (⇒ : τ) (⇒ ep (eps ...)) (⇒ f (fs ...)) (⇒ s (ss ...))])
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Lists
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(define-typed-syntax (list e ...) ≫
|
|
[⊢ e ≫ e- ⇒ τ] ...
|
|
#:fail-unless (all-pure? #'(e- ...)) "expressions must be pure"
|
|
-------------------
|
|
[⊢ (list- e- ...) ⇒ (List (U τ ...))])
|
|
|
|
(define-typed-syntax (for/fold [acc:id e-acc]
|
|
[x:id e-list]
|
|
e-body ...+) ≫
|
|
[⊢ e-list ≫ e-list- ⇒ (~List τ-l)]
|
|
#:fail-unless (pure? #'e-list-) "expression must be pure"
|
|
[⊢ e-acc ≫ e-acc- ⇒ τ-a]
|
|
#:fail-unless (pure? #'e-acc-) "expression must be pure"
|
|
[[x ≫ x- : τ-l] [acc ≫ acc- : τ-a] ⊢ (begin e-body ...) ≫ e-body- ⇒ τ-b]
|
|
#:fail-unless (pure? #'e-body-) "body must be pure"
|
|
#:fail-unless (<: #'τ-b #'τ-a)
|
|
"loop body doesn't match accumulator"
|
|
-------------------------------------------------------
|
|
[⊢ (for/fold- ([acc- e-acc-])
|
|
([x- (in-list- e-list-)])
|
|
e-body-)
|
|
⇒ τ-b])
|
|
|
|
(define-typed-syntax (for ([x:id e-list] ...)
|
|
e-body ...+) ≫
|
|
[⊢ e-list ≫ e-list- ⇒ (~List τ-l)] ...
|
|
#:fail-unless (all-pure? #'(e-list- ...)) "expressions must be pure"
|
|
[[x ≫ x- : τ-l] ... ⊢ (begin e-body ...) ≫ e-body- (⇒ : τ-b)
|
|
(⇒ ep (~effs eps ...))
|
|
(⇒ f (~effs fs ...))
|
|
(⇒ s (~effs ss ...))]
|
|
-------------------------------------------------------
|
|
[⊢ (for- ([x- (in-list- e-list-)] ...)
|
|
e-body-) (⇒ : ★/t)
|
|
(⇒ ep (eps ...))
|
|
(⇒ f (fs ...))
|
|
(⇒ s (ss ...))])
|
|
|
|
(define-typed-syntax (empty? e) ≫
|
|
[⊢ e ≫ e- ⇒ (~List _)]
|
|
#:fail-unless (pure? #'e-) "expression must be pure"
|
|
-----------------------
|
|
[⊢ (empty?- e-) ⇒ Bool])
|
|
|
|
(define-typed-syntax (first e) ≫
|
|
[⊢ e ≫ e- ⇒ (~List τ)]
|
|
#:fail-unless (pure? #'e-) "expression must be pure"
|
|
-----------------------
|
|
[⊢ (first- e-) ⇒ τ])
|
|
|
|
(define-typed-syntax (rest e) ≫
|
|
[⊢ e ≫ e- ⇒ (~List τ)]
|
|
#:fail-unless (pure? #'e-) "expression must be pure"
|
|
-----------------------
|
|
[⊢ (rest- e-) ⇒ (List τ)])
|
|
|
|
(define-typed-syntax (member? e l) ≫
|
|
[⊢ e ≫ e- ⇒ τe]
|
|
#:fail-unless (pure? #'e-) "expression must be pure"
|
|
[⊢ l ≫ l- ⇒ (~List τl)]
|
|
#:fail-unless (pure? #'l-) "expression must be pure"
|
|
#:fail-unless (<: #'τe #'τl) "incompatible list"
|
|
----------------------------------------
|
|
[⊢ (member?- e- l-) ⇒ Bool])
|
|
|
|
(define- (member?- v l)
|
|
(and- (member- v l) #t))
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Sets
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
(define-typed-syntax (set e ...) ≫
|
|
[⊢ e ≫ e- ⇒ τ] ...
|
|
#:fail-unless (all-pure? #'(e- ...)) "expressions must be pure"
|
|
---------------
|
|
[⊢ (set- e- ...) ⇒ (Set (U τ ...))])
|
|
|
|
(define-typed-syntax (set-count e) ≫
|
|
[⊢ e ≫ e- ⇒ (~Set _)]
|
|
#:fail-unless (pure? #'e-) "expression must be pure"
|
|
----------------------
|
|
[⊢ (set-count- e-) ⇒ Int])
|
|
|
|
(define-typed-syntax (set-add st v) ≫
|
|
[⊢ st ≫ st- ⇒ (~Set τs)]
|
|
#:fail-unless (pure? #'st-) "expression must be pure"
|
|
[⊢ v ≫ v- ⇒ τv]
|
|
#:fail-unless (pure? #'v-) "expression must be pure"
|
|
-------------------------
|
|
[⊢ (set-add- st- v-) ⇒ (Set (U τs τv))])
|
|
|
|
(define-typed-syntax (set-member? st v) ≫
|
|
[⊢ st ≫ st- ⇒ (~Set τs)]
|
|
#:fail-unless (pure? #'st-) "expression must be pure"
|
|
[⊢ v ≫ v- ⇒ τv]
|
|
#:fail-unless (pure? #'v-) "expression must be pure"
|
|
#:fail-unless (<: #'τv #'τs)
|
|
"type mismatch"
|
|
-------------------------------------
|
|
[⊢ (set-member?- st- v-) ⇒ Bool])
|
|
|
|
(define-typed-syntax (set-union st0 st ...) ≫
|
|
[⊢ st0 ≫ st0- ⇒ (~Set τ-st0)]
|
|
#:fail-unless (pure? #'st0-) "expression must be pure"
|
|
[⊢ st ≫ st- ⇒ (~Set τ-st)] ...
|
|
#:fail-unless (all-pure? #'(st- ...)) "expressions must be pure"
|
|
-------------------------------------
|
|
[⊢ (set-union- st0- st- ...) ⇒ (Set (U τ-st0 τ-st ...))])
|
|
|
|
(define-typed-syntax (set-intersect st0 st ...) ≫
|
|
[⊢ st0 ≫ st0- ⇒ (~Set τ-st0)]
|
|
#:fail-unless (pure? #'st0-) "expression must be pure"
|
|
[⊢ st ≫ st- ⇒ (~Set τ-st)] ...
|
|
#:fail-unless (all-pure? #'(st- ...)) "expressions must be pure"
|
|
#:with τr (∩ #'τ-st0 (type-eval #'(U τ-st ...)))
|
|
-------------------------------------
|
|
[⊢ (set-intersect- st0- st- ...) ⇒ (Set τr)])
|
|
|
|
(define-typed-syntax (set-subtract st0 st ...) ≫
|
|
[⊢ st0 ≫ st0- ⇒ (~Set τ-st0)]
|
|
#:fail-unless (pure? #'st0-) "expression must be pure"
|
|
[⊢ st ≫ st- ⇒ (~Set _)] ...
|
|
#:fail-unless (all-pure? #'(st- ...)) "expressions must be pure"
|
|
-------------------------------------
|
|
[⊢ (set-subtract- st0- st- ...) ⇒ (Set τ-st0)])
|
|
|
|
(define-typed-syntax (list->set l) ≫
|
|
[⊢ l ≫ l- ⇒ (~List τ)]
|
|
#:fail-unless (pure? #'l-) "expression must be pure"
|
|
-----------------------
|
|
[⊢ (list->set- l-) ⇒ (Set τ)])
|
|
|
|
(define-typed-syntax (set->list s) ≫
|
|
[⊢ s ≫ s- ⇒ (~Set τ)]
|
|
#:fail-unless (pure? #'s-) "expression must be pure"
|
|
-----------------------
|
|
[⊢ (set->list- s-) ⇒ (List τ)])
|
|
|
|
(module+ test
|
|
(check-type (set 1 2 3)
|
|
: (Set Int)
|
|
-> (set- 2 3 1))
|
|
(check-type (set 1 "hello" 3)
|
|
: (Set (U Int String))
|
|
-> (set- "hello" 3 1))
|
|
(check-type (set-count (set 1 "hello" 3))
|
|
: Int
|
|
-> 3)
|
|
(check-type (set-union (set 1 2 3) (set "hello" "world"))
|
|
: (Set (U Int String))
|
|
-> (set- 1 2 3 "hello" "world"))
|
|
(check-type (set-intersect (set 1 2 3) (set "hello" "world"))
|
|
: (Set ⊥)
|
|
-> (set-))
|
|
(check-type (set-intersect (set 1 "hello" 3) (set #t "world" #f "hello"))
|
|
: (Set String)
|
|
-> (set- "hello")))
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;; Tests
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |