From f81de8df0aca07531087b56227b730889114c524 Mon Sep 17 00:00:00 2001
From: Eli Bendersky <eliben@gmail.com>
Date: Fri, 8 Mar 2013 05:31:54 -0800
Subject: [PATCH] Issue #17378: ctypes documentation fix.

Document that ctypes automatically applies byref() when argtypes declares
POINTER.
---
 Doc/library/ctypes.rst | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Doc/library/ctypes.rst b/Doc/library/ctypes.rst
index 033c488f21c..486c9635573 100644
--- a/Doc/library/ctypes.rst
+++ b/Doc/library/ctypes.rst
@@ -817,6 +817,11 @@ pointer types.  So, for ``POINTER(c_int)``, ctypes accepts an array of c_int::
    3
    >>>
 
+In addition, if a function argument is explicitly declared to be a pointer type
+(such as ``POINTER(c_int)``) in :attr:`argtypes`, an object of the pointed
+type (``c_int`` in this case) can be passed to the function.  ctypes will apply
+the required :func:`byref` conversion in this case automatically.
+
 To set a POINTER type field to ``NULL``, you can assign ``None``::
 
    >>> bar.values = None