,@(filter (lambda (x) (eqv? (statement-type x) 'expr))
program)))
-
-
- ; gets both constructors and destructors
+ ; a data tor is either a constructor or destructor for an ADT
+ ; data-tors returns constructors and destructors for a data-layout
; (data A (foo Int Bool)
; (bar Bool))
; |
; v
- ; (foo . (constructor . (abs Int (abs Bool A))))
- ; (foo~0 . (0 . (abs A Int)))
- ; (foo~1 . (1 . (abs A Bool)))
- ; (bar . (constructor . (abs Bool A)))
- ; (bar~0 . (0 . (abs A Bool)))
+ ; (foo . ((A foo constructor) . (abs Int (abs Bool A))))
+ ; (foo~0 . ((A foo 0) . (abs A Int)))
+ ; (foo~1 . ((A foo 1) . (abs A Bool)))
+ ; (bar . ((A bar constructor) . (abs Bool A)))
+ ; (bar~0 . ((A bar 0) . (abs A Bool)))
+ ; ------+-------------------------------------
+ ; tor | info | type
(define (data-tors data-layout)
(define (constructor-type t products)
(define (destructor ctor-name prod-type part-type index)
(let ([name (dtor-name ctor-name index)])
- (cons name (cons index `(abs ,prod-type ,part-type)))))
+ (cons name (cons (list prod-type ctor-name index) `(abs ,prod-type ,part-type)))))
(let ([type-name (car data-layout)]
[ctors (cdr data-layout)])
(let* ([ctor-name (car ctor)]
[products (cdr ctor)]
- [maker (cons ctor-name (cons 'constructor (constructor-type type-name products)))]
+ [maker (cons ctor-name (cons (list type-name ctor-name 'constructor) (constructor-type type-name products)))]
[dtors (map (lambda (t i) (destructor ctor-name type-name t i))
products
ctors)))
; creates a type environment for a given adt definition
-(define (data-tors-env data-layout)
+(define (data-tors-type-env data-layout)
(map (lambda (x) (cons (car x) (cddr x))) (data-tors data-layout)))
(define (dtor-name ctor-name index)