This commit is contained in:
Justin Ethier 2016-04-28 23:02:45 -04:00
parent a0af78adb1
commit 743adfa4f5

View file

@ -871,6 +871,58 @@
result)
(cdr exp)
env))))))
;;(define (expand-body result exp env)
;; (if (null? exp)
;; (reverse result)
;; (let ((this-exp (car exp)))
;; (cond
;; ;; Splice in begin contents and keep expanding body
;; ((begin? (car exp))
;; (let* ((expr (car exp))
;; (begin-exprs (begin->exps expr)))
;; (expand-body
;; result
;; (append begin-exprs (cdr exp))
;; env)))
;; ((or (const? this-exp)
;; (prim? this-exp)
;; (ref? this-exp)
;; (quote? this-exp))
;; (expand-body (cons this-exp result) (cdr exp) env))
;; ((or (define? this-exp)
;; (define-c? this-exp)
;; (define-syntax? this-exp)
;; (lambda? this-exp)
;; (set!? this-exp)
;; (if? this-exp))
;; (expand-body
;; (cons
;; (expand this-exp env)
;; result)
;; (cdr exp)
;; env))
;; (else
;; (let ((macro #f))
;; (when (and (app? (car exp))
;; (symbol? (caar exp)))
;; (set! macro (env:lookup (caar exp) env #f)))
;; (if (tagged-list? 'macro macro)
;; ;; Expand macro here so we can catch begins in the expanded code,
;; ;; including nested begins
;; (let ((expanded (macro:expand (car exp) macro env)))
;; ;; Call with expanded macro in case we need to expand again
;; (expand-body
;; result
;; (cons expanded (cdr exp))
;; env))
;; ;; No macro, use main expand function to process
;; (expand-body
;; (cons
;; (expand (car exp) env)
;; result)
;; (cdr exp)
;; env))))))))
;; Top-level analysis