Author: Amaury Forgeot d'Arc <[email protected]>
Branch:
Changeset: r56647:76c0dcd40f93
Date: 2012-08-08 02:48 +0200
http://bitbucket.org/pypy/pypy/changeset/76c0dcd40f93/
Log: issue1232: ctypes: Subclasses of primitive types don't call their
__new__ when the value is extracted from a struct member. Yes, this
is confusing.
diff --git a/lib_pypy/_ctypes/basics.py b/lib_pypy/_ctypes/basics.py
--- a/lib_pypy/_ctypes/basics.py
+++ b/lib_pypy/_ctypes/basics.py
@@ -59,7 +59,8 @@
'resbuffer' is a _rawffi array of length 1 containing the value,
and this returns a general Python object that corresponds.
"""
- res = self.__new__(self)
+ res = object.__new__(self)
+ res.__class__ = self
res.__dict__['_buffer'] = resbuffer
res.__dict__['_base'] = base
res.__dict__['_index'] = index
diff --git a/pypy/module/test_lib_pypy/ctypes_tests/test_numbers.py
b/pypy/module/test_lib_pypy/ctypes_tests/test_numbers.py
--- a/pypy/module/test_lib_pypy/ctypes_tests/test_numbers.py
+++ b/pypy/module/test_lib_pypy/ctypes_tests/test_numbers.py
@@ -187,6 +187,14 @@
# probably be changed:
raises(TypeError, c_int, c_long(42))
+ def test_subclass(self):
+ class enum(c_int):
+ def __new__(cls, value):
+ dont_call_me
+ class S(Structure):
+ _fields_ = [('t', enum)]
+ assert isinstance(S().t, enum)
+
## def test_perf(self):
## check_perf()
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