[ python-Bugs-1533481 ] CTypes _as_parameter_ not working as documented

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Bugs item #1533481, was opened at 2006-08-02 16:11
Message generated for change (Comment added) made by shane_holloway
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Category: None
Group: Python 2.5
Status: Open
Resolution: None
Priority: 5
Submitted By: Shane Holloway (shane_holloway)
Assigned to: Nobody/Anonymous (nobody)
Summary: CTypes _as_parameter_ not working as documented

Initial Comment:
Reference: http://docs.python.org/dev/lib/ctypes-calling-functions-
with-own-custom-data-types.html

According to this document, I should be able to use my own objects with 
ctypes, provided I have an _as_parameter_ attribute set on my object.  
However, this does not work properly when the foreign function's 
argtypes have been set.  

This is because the _as_parameter_ access is not done until after the 
argument types are checked.  

Attached is a patch that adds _as_parameter_ checking to the types 
provided by _ctypes.c so that the feature works as documented for both 
typed and untyped foreign functions.
(Patch is against: svn rev 50859)


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>Comment By: Shane Holloway (shane_holloway)
Date: 2006-08-02 16:13

Message:
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A related patch is http://python.org/sf/1532975 that simplifies the 
implementation of _as_parameter_

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