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cps-convert.rkt
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cps-convert.rkt
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#lang racket
(require "desugar.rkt" "prims.rkt" "anf-convert.rkt")
(provide cps-convert)
(define (cps-convert prog)
(define (T-c expr c)
;(displayln (~a "T-c: " expr "\nc: "c "\n---"))
(match expr
[`(λ . ,_) `(,c '() ,(M expr))]
[ (or (? symbol?) (? number?) (? boolean?) (? string?)) `(,c '() ,(M expr))]
[`(quote ,datum) `(,c '() ',datum)] ; or `',datum? probably not, right? as of now works!
[`(apply-prim ,op ,args)
(define prm (gensym 'prm))
(T-c `(let ([,prm (apply-prim ,op ,args)]) ,prm) c)]
[`(let ([,lhs (apply-prim ,op ,args)]) ,body)
`(let ([,lhs (apply-prim ,op ,(M args))])
,(T-c body c))]
[`(let ([,lhs (prim ,op ,(? symbol? args) ...)]) ,body)
`(let ([,lhs (prim ,op ,@(map M args))])
,(T-c body c))]
[`(let ([,lhs (λ ,args ,prim-body)]) ,body)
`(let ([,lhs ,(M `(λ ,args ,prim-body))])
,(T-c body c))]
[`(let ([,lhs ',val]) ,body)
`(let ([,lhs ',val])
,(T-c body c))]
;continuation
[`(let ([,lhs ,rhs]) ,e0)
(define letk (gensym 'letk))
(T-c rhs `(λ (,letk ,lhs) ,(T-c e0 c)))]
[`(if ,grd ,texp ,fexp)
`(if ,(M grd) ,(T-c texp c) ,(T-c fexp c))]
[`(call/cc ,exp)
`(,(M exp) ,c ,c)]
[`(apply ,e0 ,e1)
(define lst (gensym 'lst))
`(let ([,lst (prim cons ,c ,(M e1))])
(apply ,(M e0) ,lst))]
[`(,f ,es ...)
`(,(M f) ,c ,@(map M es))]))
(define (M expr)
;(displayln (~a "M: " expr "\n---"))
(match expr
[`(λ (,var ...) ,body)
(define $k (gensym 'kont))
`(λ (,$k ,@var) ,(T-c body $k))]
[`(λ ,var ,body)
(define $k (gensym 'kkont))
(define newarg (gensym var))
;to avoid name conflict during cpp emision
`(λ ,newarg
(let ([,$k (prim car ,newarg)])
(let ([,var (prim cdr ,newarg)])
,(T-c body $k))))]
;handle other atomic values
[(or (? symbol?) (? number?) (? boolean?) (? string?)) expr]
[`(quote ,datum) `',datum]))
(T-c prog 'halt))
;; Examples
;(M '(λ (x) y))
; (cps-convert '(let ([x ((λ (z) z) 2)]) x))
;(pretty-print (cps-convert (anf-convert (desugar (add-prims-to-prog '(((call/cc (λ (x) ((x x) x))) (λ (y) y)) #t))))) )
;(cps-convert '(let ((car (λ args (apply-prim car args)))) '(1 2 3)))
#;(pretty-print (cps-convert (anf-convert (desugar (add-prims-to-prog
'(let ([a 6])
(let ([d 2])
(let ([e 3])
(let ([c (λ (x) (+ x a d))])
(let ([f (λ (b) (+ e d a b))])
(f a)))))))))))
;(pretty-print (cps-convert (anf-convert (desugar (add-prims-to-prog '(null? (list 1 3)))))))
; (pretty-print (cps-convert (anf-convert (desugar (add-prims-to-prog '(+ 2 (* 3 2)))))))
;(pretty-print (anf-convert (desugar (add-prims-to-prog '(+ 2 3 5)))))
; (pretty-print (cps-convert (anf-convert (desugar (add-prims-to-prog '(+ '2 '3))))))
;(pretty-print (cps-convert (anf-convert (desugar '(+ 2 1)))))
;(cps-convert (anf-convert (desugar (add-prims-to-prog '(+ 2 (* 3 2))))))
;(cps-convert (anf-convert (desugar (add-prims-to-prog '(apply (λ (a b c) b) (list 1 (list 5 6) 4))))))
; (pretty-print (cps-convert (anf-convert (desugar (add-prims-to-prog '(map + (list 1 2)))))))
;(pretty-print (cps-convert (anf-convert (desugar (add-prims-to-prog '(map1 (lambda (x) (+ 1 x)) (list 1 2)))))))
; (pretty-print (cps-convert '(let ((car (λ args (apply-prim car args))))
; (let ((+ (λ args (apply-prim + args))))
; (let ((Ycomb
; ((λ (x) (x x))
; (λ (g)
; (λ (f)
; (f
; (λ vs
; (let ((t6370 (g g)))
; (let ((t6371 (t6370 f)))
; (apply t6371 vs))))))))))
; (+ 2 3 5))))))
(define example
'(lambda (f)
(lambda (z)
(lambda (x)
(f x z a)))))
; (pretty-print (cps-convert (anf-convert (desugar (add-prims-to-prog example)))))
; (pretty-print (cps-convert (anf-convert (desugar (add-prims-to-prog '(let ([x 42]) (+ x 10)))))))
; (pretty-print (cps-convert (anf-convert (desugar '(let ((f (λ (x) x))) ((f f) 3))))))
; (pretty-print (anf-convert (desugar '(let ((f (λ (x) x))) ((f f) 3)))))
; (pretty-print (cps-convert (anf-convert (desugar '(let ((f (λ (x) x))) ((f f) 3))))))
; (pretty-print (cps-convert (anf-convert (desugar (add-prims-to-prog '(let ((f (λ (x) x))) (let ((v (f f))) (v 3))))))))
; (pretty-print (anf-convert (desugar (add-prims-to-prog '(let ((f (λ (x) x))) (let ((v (f f))) (v 3)))))))
; (pretty-print (cps-convert `(let ((+ (λ args (apply-prim + args)))) '(let ((f (λ (x) x))) (let ((v (f f))) (v 3))))))
; (pretty-print (anf-convert `(λ param_lst1550
; (let ((* (car param_lst1550)) (param_lst1550 (cdr param_lst1550)))
; (let ((lst2 (car param_lst1550)) (param_lst1550 (cdr param_lst1550)))
; (let ((lst param_lst1550)) (apply-prim * lst)))))))
; (pretty-print (cps-convert (anf-convert `(λ param_lst1550
; (let ((* (car param_lst1550)) (param_lst1550 (cdr param_lst1550)))
; (let ((lst2 (car param_lst1550)) (param_lst1550 (cdr param_lst1550)))
; (let ((lst param_lst1550)) (apply-prim * lst))))))))
; (pretty-print (cps-convert (anf-convert `(λ param_lst3041
; (let ((- (car param_lst3041)) (param_lst3041 (cdr param_lst3041)))
; (let ((lst param_lst3041)) (apply-prim - lst)))))))