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Keep track of lexical variables, be more careful about (if)

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Justin Ethier 2019-09-09 18:26:32 -04:00
parent 2ad35be419
commit da4ffd84a3
1 changed files with 11 additions and 7 deletions
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18
validation.scm
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@ -37,9 +37,11 @@
;; TODO: could check primitives, etc
;; TODO: what if any keywords are shadowed? need to populate vars
(define (update-vars syms vars)
(append vars (filter include-var? syms)))
(define (search exp vars)
;(pretty-print `(search ,exp))(newline)
(pretty-print `(search ,exp ,vars))(newline)
(cond
;((ast:lambda? exp) 'TODO)
((const? exp) #f)
@ -49,26 +51,28 @@
(if (not (member 'lambda vars)) (check-lambda exp))
(for-each
(lambda (e)
(search e vars))
(search e (update-vars (lambda-formals->list exp) vars)))
(lambda->exp exp))
)
((if? exp)
(if (not (member 'if vars)) (check-if exp))
((and (if? exp)
(not (member 'if vars)))
(check-if exp)
(search (if->condition exp) vars)
(search (if->then exp) vars)
(search (if->else exp) vars))
(when (> (length exp) 3)
(search (if->else exp) vars)))
((define? exp)
(if (not (member 'define vars)) (check-define exp))
(search (define->var exp) vars)
(for-each
(lambda (e)
(search e vars))
(search e (update-vars (list (define->var exp)) vars)))
(define->exp exp)))
((define-c? exp) #f)
((set!? exp)
(if (not (member 'set! vars)) (check-set exp))
(search (set!->var exp) vars)
(search (set!->exp exp) vars))
(search (set!->exp exp) (update-vars (list (set!->var exp)) vars)))
; Future?
;((tagged-list? 'let exp)
; (set! let-vars (append (map car (cadr exp)) let-vars))