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* inconsistency between let and lambda
@ 2011-01-13 16:58 Joo ChurlSoo
  2011-01-15 20:42 ` Neil Jerram
  0 siblings, 1 reply; 2+ messages in thread
From: Joo ChurlSoo @ 2011-01-13 16:58 UTC (permalink / raw)
  To: guile-user


The following behavior of `let' seems to be wrong.

guile> (version)
"1.8.8"
guile> 
(let ((go #f)
      (alist '()))
  (let ((a 1) (b (call-with-current-continuation (lambda (x) (set! go x) 2))))
    (set! alist (cons (cons a b) alist))
    (set! a 100)
    (set! alist (cons (cons a b) alist))
    (if (< (length alist) 3)
	(go 2)
	(reverse alist))))
((1 . 2) (100 . 2) (100 . 2) (100 . 2))
guile>;; inconsistency between let and lambda
(let ((go #f)
      (alist '()))
  ((lambda (a b)
     (set! alist (cons (cons a b) alist))
     (set! a 100)
     (set! alist (cons (cons a b) alist))
     (if (< (length alist) 3)
	 (go 2)
	 (reverse alist)))
   1 (call-with-current-continuation (lambda (x) (set! go x) 2))))
((1 . 2) (100 . 2) (1 . 2) (100 . 2))
guile>

-- 
Joo ChurlSoo




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2011-01-13 16:58 inconsistency between let and lambda Joo ChurlSoo
2011-01-15 20:42 ` Neil Jerram

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