[Larceny-users] Larceny v0.963 what is bound to 'make-parameter ?

[Ken Dickey]

larceny

Larceny v0.963 "Fluoridation" (Jul 29 2008 17:41:31, precise:Linux:unified)
larceny.heap, built on Tue Jul 29 17:43:55 EDT 2008

(define p (make-parameter 3))

Error: Wrong number of arguments to procedure #<PROCEDURE make-parameter>,
which expected #!unspecified but got 1
Entering debugger; type "?" for help.
debug> q

(make-parameter) ;; Huh?

Error: Wrong number of arguments to procedure #<PROCEDURE make-parameter>,
which expected #!unspecified but got 0
Entering debugger; type "?" for help.
debug> q

(require 'srfi-39)

#t

(define p (make-parameter 3))
(p)

3

(p 4)

(4 . #!unspecified)

(p)

4 ;; as expected

;;=========

Should there be a warning for the unwary?

-KenD

[Felix Klock]

Ken-

Post by Ken Dickey

larceny

Larceny v0.963 "Fluoridation" (Jul 29 2008 17:41:31,
precise:Linux:unified)
larceny.heap, built on Tue Jul 29 17:43:55 EDT 2008

(define p (make-parameter 3))

Error: Wrong number of arguments to procedure #<PROCEDURE make-
parameter>,
which expected #!unspecified but got 1
Entering debugger; type "?" for help.
debug> q

(make-parameter) ;; Huh?

Error: Wrong number of arguments to procedure #<PROCEDURE make-
parameter>,
which expected #!unspecified but got 0
Entering debugger; type "?" for help.
debug> q

Its unfortunate that the error message is not giving you the actual
arity that make-parameter *does* expect.

But make-parameter is documented in the Larceny manual. Larceny's
version of make-parameter takes at least 2 arguments.

See section "10.13. Parameters"

-Felix