[Python-Dev] [docs] undocumented argtypes magic in ctypes? (original) (raw)
Thomas Heller theller at ctypes.org
Thu Mar 7 12:37:14 CET 2013
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Am 06.03.2013 18:19, schrieb Eli Bendersky:
On Wed, Mar 6, 2013 at 8:33 AM, Andrew Svetlov <andrew.svetlov at gmail.com_ _<mailto:andrew.svetlov at gmail.com>> wrote: Looks like bug for me. ctypes seems to auto-convert arguments when argtypes is specified. This fact is documented. However, I'm not sure whether this auto-conversion is advanced enough to apply byref. Because otherwise, DIRENT is certainly not convertible to DIRENTp
If argtypes specify a 'POINTER(X)' type as an argument, then ctypes automatically applies byref() if an 'X' instance is passed to the actual call. This is by design, but I'm not sure if it is documented or not.
However, if argtypes is not given, this does (and of course cannot) work.
Thomas
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