Further work on typed syntax
This commit is contained in:
Georges Dupéron
parent
3b59681010
commit
dc1561e595
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@ -12,14 +12,14 @@
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(define-type First-Comments
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(Rec R (Pairof (U #f (Pairof (Syntaxof 'saved-props+srcloc)
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R))
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(Listof (Syntaxof Any)))))
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(Listof ISyntax))))
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(define-type Comments-After
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(Listof (Syntaxof Any)))
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(Listof ISyntax))
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(: with-first-comments (∀ (A) (→ (Syntaxof A)
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(: with-first-comments (∀ (A) (→ ISyntax
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(U #f First-Comments)
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(Syntaxof A))))
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ISyntax)))
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(define (with-first-comments e c)
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(if (or (not c) (and (= (length c) 1) (not (first c))))
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@ -132,85 +132,3 @@
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[(unmodified) (list e)]
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[(modified) (list e*)]
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[(#f) #f])))
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;; Syntax:
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(struct (A) NonSyntax ([value : A]) #:type-name NonSyntaxOf)
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(define-type (SyntaxU A)
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(Syntaxof (SexpStx A)))
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(define-type (SexpStx A)
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(Rec sexp (U Boolean
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Char
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Complex
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Keyword
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Null
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String
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Symbol
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(Boxof sexp)
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(Pairof sexp sexp)
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(Vectorof sexp)
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(Syntaxof sexp)
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A)))
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(: syntax-wrapper (∀ (A) (→ (non-sexp-handler (U A (SyntaxU A)))
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(non-sexp-handler (U A (SyntaxU A))))))
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(define (syntax-wrapper nested-wrapper)
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(: recur (→ Any
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(Values (U (Sexpof (U A (SyntaxU A))) #f)
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(U 'unmodified 'modified #f))))
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(define (recur e)
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(cond
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[(syntax? e)
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(let-values ([(e* status) (try-any->isexp* (syntax-e e) recur)])
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(case status
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[(unmodified) (values (ann (unsafe-cast e (U (SyntaxU A) #f))
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(U (SyntaxU A) #f))'unmodified)]
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[(modified) (values (datum->syntax* e e* e e) 'modified)]
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[(#f) (values #f #f)]))]
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[else (nested-wrapper e)]))
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recur)
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(: any->isexpstx+non-syntax (→ Any (Sexpof (U (NonSyntaxOf Any) (SyntaxU (NonSyntaxOf Any))))))
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(define (any->isexpstx+non-syntax e)
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(let*-values ([(e* status)
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((inst try-any->isexp* (U (NonSyntaxOf Any) (SyntaxU (NonSyntaxOf Any))))
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e
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(syntax-wrapper
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(λ (non-syntax-e)
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(values (NonSyntax non-syntax-e)
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'modified))))])
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(case status
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[(unmodified) (unsafe-cast e (SyntaxU (NonSyntaxOf Any)))]
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[(modified) e*]
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[(#f)
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(error
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(string-append "Got #f from try->any-isexp* using non-sexp which does"
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" not return #f."))])))
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;; TODO: this duplicates parts of any->isexpstx+non-syntax and syntax-wrapper.
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(: syntax->isyntax+non-syntax (→ Syntax (SyntaxU (NonSyntaxOf Any))))
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(define (syntax->isyntax+non-syntax e)
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(let-values ([(e* status) (try-any->isexp* (syntax-e e)
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(syntax-wrapper
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(λ (non-syntax-e)
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(values (NonSyntax non-syntax-e)
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'modified))))])
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(case status
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[(unmodified) (unsafe-cast e (SyntaxU (NonSyntaxOf Any)))]
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[(modified) (datum->syntax* e e* e e)]
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[(#f)
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(error (string-append "Got #f from try->any-isexp* using non-sexp which"
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" does not return #f."))])))
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;(: try-any->isyntax (→ Any (U (List Any) #f)))
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#;(define (try-any->isyntax e)
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(let*-values ([(e* status) (try-any->isexp*
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e
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(λ (non-sexp-e)
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(values #f #f)))])
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(case status
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[(unmodified) (list e)]
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[(modified) (list e*)]
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[(#f) #f])))
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@ -15,6 +15,8 @@
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ISyntaxOf-E
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ISyntax
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ISyntax-E
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ISyntax/Not
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ISyntax/Not-E
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(struct-out NonSyntax)
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;(struct-out NonSexp) ; already exported in typed-syntax-convert.rkt
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NonSyntaxOf
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@ -65,47 +67,57 @@
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(struct (A) NonSyntax ([value : A]) #:type-name NonSyntaxOf)
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(struct (A) NonSexp ([value : A]) #:type-name NonSexpOf)
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(define-type ISyntax (ISyntaxOf (NonSyntaxOf Any) (NonSexpOf Any)))
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(define-type ISyntax-E (ISyntaxOf-E (NonSyntaxOf Any) (NonSexpOf Any)))
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(define-type ISyntax/Not (ISyntaxOf (NonSyntaxOf Any) (NonSexpOf Any)))
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(define-type ISyntax/Not-E (ISyntaxOf-E (NonSyntaxOf Any) (NonSexpOf Any)))
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(: syntax->isyntax (→ (Syntaxof Any)
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(Values ISyntax
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(U 'modified 'unmodified))))
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(define (syntax->isyntax stx)
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(define-type ISyntax (ISyntaxOf Nothing Nothing))
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(define-type ISyntax-E (ISyntaxOf-E Nothing Nothing))
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(: syntax->isyntax (∀ (A B) (→ (Syntaxof Any)
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(→ Any (Values A (U 'modified 'unmodified #;#f)))
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(→ Any (Values B (U 'modified 'unmodified #;#f)))
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(Values (ISyntaxOf A B) ;; TODO: change to (SyntaxOf (ISnyntaxOf-E …))
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(U 'modified 'unmodified #;#f)))))
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(define (syntax->isyntax stx nstx nsexp)
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(define e (syntax-e stx))
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(define-values (e* status) (any->isyntax-e e))
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(define-values (e* status) (any->isyntax-e e nstx nsexp))
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(case status
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[(unmodified)
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(values (unsafe-cast e ISyntax) 'unmodified)]
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(values (unsafe-cast e (ISyntaxOf A B)) 'unmodified)]
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[(modified)
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(values (datum->syntax* stx e* stx stx) 'modified)]
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#;[(#f)
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(values #f #f)]))
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(values #f #f)]))
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(: any->isyntax (→ Any
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(Values ISyntax
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(U 'modified 'unmodified))))
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(define (any->isyntax e)
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(: any->isyntax (∀ (A B) (→ Any
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(→ Any (Values A (U 'modified 'unmodified #;#f)))
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(→ Any (Values B (U 'modified 'unmodified #;#f)))
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(Values (ISyntaxOf A B)
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(U 'modified 'unmodified #;#f)))))
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(define (any->isyntax e nstx nsexp)
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(if (syntax? e)
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(syntax->isyntax e)
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(values (NonSyntax e) 'modified)))
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(syntax->isyntax e nstx nsexp)
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(nstx e)))
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(: listof-any->listof-isyntax (→ (Listof Any)
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(Pairof (Listof ISyntax)
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(U 'modified 'unmodified))))
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(define (listof-any->listof-isyntax e)
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(: listof-any->listof-isyntax
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(∀ (A B) (→ (Listof Any)
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(→ Any (Values A (U 'modified 'unmodified #;#f)))
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(→ Any (Values B (U 'modified 'unmodified #;#f)))
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(Pairof (Listof (ISyntaxOf A B))
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(U 'modified 'unmodified #;#f)))))
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(define (listof-any->listof-isyntax e nstx nsexp)
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(define e+status*
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(map (λ ([eᵢ : Any])
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(let-values ([(eᵢ* status) (any->isyntax eᵢ)])
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(let-values ([(eᵢ* status) (any->isyntax eᵢ nstx nsexp)])
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(cons eᵢ* status)))
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e))
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(define e* (map car e+status*))
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(define status* (map cdr e+status*))
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(cond
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[(andmap (curry eq? 'unmodified) status*)
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(cons (unsafe-cast e (Listof ISyntax)) 'unmodified)]
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(cons (unsafe-cast e (Listof (ISyntaxOf A B))) 'unmodified)]
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#;[(ormap (curry eq? #f) status*)
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(cons #f #f)]
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(cons #f #f)]
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[else
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(cons e* 'modified)]))
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@ -128,20 +140,23 @@
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(Rec L (U Syntax-E
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(Pairof Syntax-E L))))
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(U 'unmodified 'modified)))))
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(: handle-pair (→ (U (Pairof Any (Listof Any))
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(Pairof Any (Rec L (U Any (Pairof Any L)))))
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(Values (Pairof ISyntax
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(Rec L (U ISyntax
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Null
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(Pairof ISyntax L))))
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(U 'unmodified 'modified))))
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(define (handle-pair e)
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(: handle-pair (∀ (A B) (→ (U (Pairof Any (Listof Any))
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(Pairof Any (Rec L (U Any (Pairof Any L)))))
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(→ Any (Values A (U 'modified 'unmodified #;#f)))
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(→ Any (Values B (U 'modified 'unmodified #;#f)))
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(Values (Pairof (ISyntaxOf A B)
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(Rec L (U (ISyntaxOf A B)
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Null
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(Pairof (ISyntaxOf A B)
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L))))
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(U 'unmodified 'modified)))))
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(define (handle-pair e nstx nsexp)
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(let-values ([(car* status-car)
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(any->isyntax (car e))])
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(any->isyntax (car e) nstx nsexp)])
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(cond
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[(pair? (cdr e))
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(let-values ([(cdr* status-cdr)
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(handle-pair (cdr e))])
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(handle-pair (cdr e) nstx nsexp)])
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(cond
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#;[(and (eq? status-car 'unmodified)
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(eq? status-cdr 'unmodified))
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@ -165,7 +180,7 @@
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(values (cons car* (cdr e)) 'modified)])]
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[else
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(let-values ([(cdr* status-cdr)
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(any->isyntax (cdr e))])
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(any->isyntax (cdr e) nstx nsexp)])
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(cond
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#;[(and (eq? status-car 'unmodified)
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(eq? status-cdr 'unmodified))
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@ -198,10 +213,12 @@
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[else
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(values (cons car* cdr*) 'modified)]))
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(: any->isyntax-e (→ Any
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(Values ISyntax-E
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(U 'modified 'unmodified))))
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(define (any->isyntax-e e)
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(: any->isyntax-e (∀ (A B) (→ Any
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(→ Any (Values A (U 'modified 'unmodified #;#f)))
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(→ Any (Values B (U 'modified 'unmodified #;#f)))
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(Values (ISyntaxOf-E A B)
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(U 'modified 'unmodified #;#f)))))
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(define (any->isyntax-e e nstx nsexp)
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(cond
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[(boolean? e) (values e 'unmodified)]
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[(char? e) (values e 'unmodified)]
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@ -212,7 +229,7 @@
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(values e 'unmodified)
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(values (string->immutable-string e) 'modified))]
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[(symbol? e) (values e 'unmodified)]
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[(box? e) (let-values ([(u* status) (any->isyntax (unbox e))])
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[(box? e) (let-values ([(u* status) (any->isyntax (unbox e) nstx nsexp)])
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(case status
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[(unmodified)
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;(if (immutable? e)
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@ -223,17 +240,19 @@
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(values (box-immutable u*) 'modified)]
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#;[(#f)
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(values #f #f)]))]
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[(pair? e) (handle-pair e)]
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[(pair? e) (handle-pair e nstx nsexp)]
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[(vector? e) (match-let ([(cons vs* status)
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(listof-any->listof-isyntax (vector->list e))])
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(listof-any->listof-isyntax (vector->list e) nstx nsexp)])
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(case status
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[(unmodified)
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(if (immutable? e)
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(values (unsafe-cast e ISyntax-E) 'unmodified)
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(values (apply vector-immutable vs*) 'modified))]
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(values (unsafe-cast e (ISyntaxOf-E A B))
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'unmodified)
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(values (apply vector-immutable vs*)
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'modified))]
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[(modified)
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(values (apply vector-immutable vs*) 'modified)]
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#;[(#f)
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(values #f #f)]))]
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[else
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(values (NonSexp e) 'modified)]))
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(nsexp e)]))
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@ -6,8 +6,8 @@
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CoreSexp
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ISyntaxOf
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ISyntaxOf-E
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ISyntax
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ISyntax-E
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ISyntax/Not
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ISyntax/Not-E
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NonSyntaxOf
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NonSexpOf
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any->isyntax ;; TODO: make wrappers for these, which discard the second value
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