On Wed, 5 Jul 2000, Greg Ward wrote:
>
> Well, it's a nice theory. It doesn't explain why '__add__()' works for
> ExtensionClass while '__radd__()' does not; perhaps ExtensionClass
> implements that much of Python's class semantics, but doesn't go as far
> as '__radd__()'.
>
A quick note which you probably already know:
grep add ExtensionClass.c gives:
static PyObject *py__add__, *py__sub__, *py__mul__, *py__div__,
INIT_PY_NAME(__add__); BINOP(add,Add)
FILLENTRY(nm->nb, add, add, METH_VARARGS, "Add to another");
FILLENTRY(sm->sq, concat, add, METH_VARARGS,
SET_SPECIAL(add,add); subclass_add(PyObject *self, PyObject *v)
UNLESS(m=subclass_getspecial(self,py__add__)) return NULL;
&& AsCMethod(m)->meth==(PyCFunction)add_by_name
ASSIGN(m,AsCMethod(m)->type->tp_as_number->nb_add(self,v));
(binaryfunc)subclass_add, /*nb_add*/
(binaryfunc)subclass_add, /*sq_concat*/
return; /* we added a reference; don't delete now */
whereas grep radd ExtensionClass.c returns nothing
Pavlos
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