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Placeholders for letrec-syntax

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Justin Ethier 2017-12-12 18:13:19 -05:00
parent 55b112afbd
commit b283c50341
1 changed files with 11 additions and 0 deletions
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11
scheme/eval.sld
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@ -404,6 +404,9 @@
((and (tagged-list? 'let-syntax exp) ((and (tagged-list? 'let-syntax exp)
(not (null? (cdr exp)))) (not (null? (cdr exp))))
(analyze-let-syntax exp env)) (analyze-let-syntax exp env))
((and (tagged-list? 'letrec-syntax exp)
(not (null? (cdr exp))))
(analyze-letrec-syntax exp env))
((and (if? exp) ((and (if? exp)
(not (null? (cdr exp)))) (not (null? (cdr exp))))
(analyze-if exp env)) (analyze-if exp env))
@ -465,6 +468,14 @@
;;(newline) ;;(newline)
(analyze cleaned a-env))) (analyze cleaned a-env)))
;; TODO: following is just a placeholder, does not work yet
(define (analyze-letrec-syntax exp a-env)
(let* ((body-env a-env) ;;(env:extend-environment '() '() a-env))
(expanded (expand exp body-env body-env))
(cleaned (macro:cleanup expanded body-env))
)
(analyze cleaned body-env)))
(define (analyze-syntax exp a-env) (define (analyze-syntax exp a-env)
(let ((var (cadr exp))) (let ((var (cadr exp)))
(cond (cond