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Non-function fields, like tp_dictoffset and tp_weaklistoffset, should 

be inherited in inherit_special(), otherwise dynamic types don't
inherit these.

Also added some XXX comments about open ends.
This commit is contained in:
Guido van Rossum 2001-08-14 20:04:48 +00:00
parent 481081e369
commit 4dd64ab5ea
1 changed files with 22 additions and 5 deletions
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27
Objects/typeobject.c
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@ -852,6 +852,7 @@ object_dealloc(PyObject *self)
}
#if 0
/* XXX These should be made smarter before they can be used */
static PyObject *
object_repr(PyObject *self)
{
@ -1036,6 +1037,20 @@ inherit_special(PyTypeObject *type, PyTypeObject *base)
}
}
PyType_SET_BASICSIZE(type, newsize);
/* Copy other non-function slots */
#undef COPYVAL
#define COPYVAL(SLOT) \
if (type->SLOT == 0) type->SLOT = base->SLOT
COPYVAL(tp_itemsize);
if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_WEAKREFS) {
COPYVAL(tp_weaklistoffset);
}
if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_CLASS) {
COPYVAL(tp_dictoffset);
}
}
static void
@ -1136,7 +1151,6 @@ inherit_slots(PyTypeObject *type, PyTypeObject *base)
basebase = base->tp_base;
COPYSLOT(tp_itemsize);
COPYSLOT(tp_dealloc);
COPYSLOT(tp_print);
if (type->tp_getattr == NULL && type->tp_getattro == NULL) {
@ -1153,7 +1167,6 @@ inherit_slots(PyTypeObject *type, PyTypeObject *base)
COPYSLOT(tp_call);
COPYSLOT(tp_str);
COPYSLOT(tp_as_buffer);
COPYSLOT(tp_flags);
if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_RICHCOMPARE) {
if (type->tp_compare == NULL && type->tp_richcompare == NULL) {
type->tp_compare = base->tp_compare;
@ -1163,9 +1176,6 @@ inherit_slots(PyTypeObject *type, PyTypeObject *base)
else {
COPYSLOT(tp_compare);
}
if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_WEAKREFS) {
COPYSLOT(tp_weaklistoffset);
}
if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_ITER) {
COPYSLOT(tp_iter);
COPYSLOT(tp_iternext);
@ -2244,6 +2254,8 @@ SLOT0(slot_nb_absolute, "__abs__")
static int
slot_nb_nonzero(PyObject *self)
{
/* XXX This should cope with a missing __nonzero__ */
/* XXX Should it also look for __len__? */
PyObject *res = PyObject_CallMethod(self, "__nonzero__", "");
if (res == NULL)
@ -2283,6 +2295,7 @@ SLOT1(slot_nb_inplace_true_divide, "__itruediv__", PyObject *, "O")
static int
slot_tp_compare(PyObject *self, PyObject *other)
{
/* XXX Should this cope with a missing __cmp__? */
PyObject *res = PyObject_CallMethod(self, "__cmp__", "O", other);
long r;
@ -2293,11 +2306,13 @@ slot_tp_compare(PyObject *self, PyObject *other)
return (int)r;
}
/* XXX This should cope with a missing __repr__, and also look for __str__ */
SLOT0(slot_tp_repr, "__repr__")
static long
slot_tp_hash(PyObject *self)
{
/* XXX This should cope with a missing __hash__ */
PyObject *res = PyObject_CallMethod(self, "__hash__", "");
long h;
@ -2322,6 +2337,7 @@ slot_tp_call(PyObject *self, PyObject *args, PyObject *kwds)
return res;
}
/* XXX This should cope with a missing __str__, and also look for __repr__ */
SLOT0(slot_tp_str, "__str__")
static PyObject *
@ -2371,6 +2387,7 @@ static char *name_op[] = {
static PyObject *
slot_tp_richcompare(PyObject *self, PyObject *other, int op)
{
/* XXX How should this cope with missing __xx__? */
PyObject *meth = PyObject_GetAttrString(self, name_op[op]);
PyObject *res;