From: "Mr. Peter Ivanyi" <peteri@carme.sect.mce.hw.ac.uk>
Subject: access of global variables from modules
Date: Sat, 30 Mar 2002 22:43:45 +0000 [thread overview]
Message-ID: <3CA63FA1.5FBAC15@carme.sect.mce.hw.ac.uk> (raw)
Hello again,
I have another problem with modules.
If I have a module can the module access "global" variables.
I have an application, which defines some global variables.
The application also loads some modules and I would like to access
the global variables from the module.
How can I do it ? (I think I can put the global variables into a module
and another module can depend on it, but isn't there another way ?)
For example I have this module (gen.scm):
----------------------
(define-module (gen gen))
(export gen-hello)
(define (gen-hello)
(set! *G* 3)
(display "Hello World !")
(newline)
)
-------------------------
then I receive this
-------------------------
peteri@mercury $ guile
guile> (define *G* 1)
guile> (use-modules (gen gen))
guile> (gen-hello)
./gen/gen.scm:7:1: In expression (set! *G* 3):
./gen/gen.scm:7:1: Unbound variable: *G*
ABORT: (unbound-variable)
Type "(backtrace)" to get more information or "(debug)" to enter the debugger.
guile>
-------------------------
instead of setting *G* to 3 and then print "Hello World !".
Thanks, for your help in advance.
Peter Ivanyi
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next reply other threads:[~2002-03-30 22:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-30 22:43 Mr. Peter Ivanyi [this message]
2002-04-01 14:26 ` access of global variables from modules Neil Jerram
2002-04-01 15:24 ` Mr. Peter Ivanyi
2002-04-01 18:29 ` Neil Jerram
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