lists
This commit is contained in:
Sam Caldwell
Sam Caldwell
parent
03285824c7
commit
6d2d14459c
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@ -15,15 +15,17 @@
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assert on
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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
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;; making types
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define-type-alias
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define-constructor
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;; lists
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list first rest member? empty? for for/fold
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;; DEBUG and utilities
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print-type print-role
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;; Extensions
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@ -620,6 +622,10 @@
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(for/and ([key (in-list '(a r f s))])
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(effect-free? e- key)))
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;; (SyntaxOf DesugaredSyntax ...) -> Bool
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(define-for-syntax (all-pure? es)
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(stx-andmap pure? es))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Core forms
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@ -1134,36 +1140,6 @@
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---------------------------------------------------------------------------
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[⊢ (equal?- e1- e2-) (⇒ : Bool)])
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(define-typed-syntax (empty? e) ≫
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[⊢ e ≫ e- (⇒ : (~List _))]
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#:fail-unless (pure? #'e-) "expression not allowed to have effects"
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-----------------------
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[⊢ (empty?- e-) (⇒ : Bool)])
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(define-typed-syntax (first e) ≫
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[⊢ e ≫ e- (⇒ : (~List τ))]
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#:fail-unless (pure? #'e-) "expression not allowed to have effects"
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-----------------------
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[⊢ (first- e-) (⇒ : τ)])
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(define-typed-syntax (rest e) ≫
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[⊢ e ≫ e- (⇒ : (~List τ))]
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#:fail-unless (pure? #'e-) "expression not allowed to have effects"
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-----------------------
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[⊢ (rest- e-) (⇒ : (List τ))])
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(define-typed-syntax (member? e l) ≫
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[⊢ e ≫ e- (⇒ : τe:type)]
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[⊢ l ≫ l- (⇒ : (~List τl:type))]
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#:fail-unless (<: #'τe.norm #'τl.norm) "incompatible list"
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#:fail-unless (pure? #'e-) "expression not allowed to have effects"
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#:fail-unless (pure? #'l-) "expression not allowed to have effects"
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----------------------------------------
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[⊢ (member?- e- l-) (⇒ : Bool)])
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(define- (member?- v l)
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(and- (member- v l) #t))
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(define-typed-syntax (displayln 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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@ -1208,6 +1184,80 @@
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----------------------------------
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[⊢ e- (⇒ : τ) (⇒ a as) (⇒ r rs) (⇒ f es)])
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Lists
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define-typed-syntax (list e ...) ≫
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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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[⊢ (list- e- ...) ⇒ (List (U τ ...))])
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(define-typed-syntax (for/fold [acc:id e-acc]
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[x:id e-list]
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e-body ...+) ≫
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[⊢ e-list ≫ e-list- ⇒ (~List τ-l)]
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#:fail-unless (pure? #'e-list-) "expression must be pure"
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[⊢ e-acc ≫ e-acc- ⇒ τ-a]
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#:fail-unless (pure? #'e-acc-) "expression must be pure"
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[[x ≫ x- : τ-l] [acc ≫ acc- : τ-a] ⊢ (begin e-body ...) ≫ e-body- ⇒ τ-b]
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#:fail-unless (pure? #'e-body-) "body must be pure"
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#:fail-unless (<: #'τ-b #'τ-a)
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"loop body doesn't match accumulator"
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-------------------------------------------------------
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[⊢ (for/fold- ([acc- e-acc-])
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([x- (in-list- e-list-)])
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e-body-)
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⇒ τ-b])
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(define-typed-syntax (for ([x:id e-list] ...)
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e-body ...+) ≫
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[⊢ e-list ≫ e-list- ⇒ (~List τ-l)] ...
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#:fail-unless (all-pure? #'(e-list- ...)) "expressions must be pure"
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[[x ≫ x- : τ-l] ... ⊢ (begin e-body ...) ≫ e-body- (⇒ : τ-b)
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(⇒ a (~effs as ...))
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(⇒ r (~effs rs ...))
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(⇒ f (~effs fs ...))
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(⇒ s (~effs ss ...))]
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-------------------------------------------------------
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[⊢ (for- ([x- (in-list- e-list-)] ...)
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e-body-) (⇒ : ★/t)
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(⇒ a (as ...))
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(⇒ r (rs ...))
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(⇒ f (fs ...))
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(⇒ s (ss ...))])
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(define-typed-syntax (empty? e) ≫
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[⊢ e ≫ e- ⇒ (~List _)]
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#:fail-unless (pure? #'e-) "expression must be pure"
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-----------------------
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[⊢ (empty?- e-) ⇒ Bool])
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(define-typed-syntax (first e) ≫
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[⊢ e ≫ e- ⇒ (~List τ)]
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#:fail-unless (pure? #'e-) "expression must be pure"
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-----------------------
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[⊢ (first- e-) ⇒ τ])
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(define-typed-syntax (rest e) ≫
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[⊢ e ≫ e- ⇒ (~List τ)]
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#:fail-unless (pure? #'e-) "expression must be pure"
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-----------------------
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[⊢ (rest- e-) ⇒ (List τ)])
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(define-typed-syntax (member? e l) ≫
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[⊢ e ≫ e- ⇒ τe]
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#:fail-unless (pure? #'e-) "expression must be pure"
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[⊢ l ≫ l- ⇒ (~List τl)]
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#:fail-unless (pure? #'l-) "expression must be pure"
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#:fail-unless (<: #'τe #'τl) "incompatible list"
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----------------------------------------
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[⊢ (member?- e- l-) ⇒ Bool])
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(define- (member?- v l)
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(and- (member- v l) #t))
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; Tests
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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