---------- Forwarded message ----------
From: Simon King <[EMAIL PROTECTED]>
Date: Oct 18, 2007 11:49 AM
Subject: cimport of extension classes?
To: sage-newbie <[EMAIL PROTECTED]>
Dear Sage team,
i address this question to "newbie" since it probably has a well known
(but not to me...) answer.
I defined an extension class "Foo" in some module foo.pyx and would
like to cimport it in other modules. Certainly a standard thing to do.
In the "SAGE Programming Guide" (Release 2007.09.26), subsection
5.3.3, it is explained how to make C-level methods callable from a
different Cython module. So, i expected that it works like that for
extension classes as well, and tried
- in foo.pyx:
cdef public class Foo:
<lots of definitions>
- in foo.pxd:
cdef extern class Foo
- in Module.pyx:
cimport foo
<lots of code referring to foo.Foo>
However, this doesn't work in the faintest.
Running sage -cython foo.pyx yields:
Complaint for foo.pxd: "Module name required for 'extern' C class"
Complaint for foo.pyx: "Object struct name specification required for
'public' C class"
and "Type object name specification required
for 'public' C class"
I made various attempts to guess the right syntax, but it didn't work.
Can you help me?
Yours sincerely
Simon
--
William Stein
Associate Professor of Mathematics
University of Washington
http://wstein.org
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