[Python-Dev] PEP 580/590 discussion
J.Demeyer at UGent.be
Mon May 6 03:43:46 EDT 2019
On 2019-05-06 00:04, Petr Viktorin wrote:
> - Single bound method class for all kinds of function classes: This
> would be a cleaner design, yes, but I don't see a pressing need. As
> PEP 579 says, "this is a compounding issue", not a goal. As I recall,
> that is the only major reason for CCALL_DEFARG.
Just a minor correction here: I guess that you mean CCALL_SELFARG. The
flag CCALL_DEFARG is for passing the PyCCallDef* in PEP 580, which is
mostly equivalent to passing the callable object in PEP 590.
The signature of PEP 580 is
func(const PyCCallDef *def, PyObject *self, PyObject *const *args,
Py_ssize_t nargs, PyObject *kwnames)
And with PEP 590 it is
func(PyObject *callable, PyObject *const *args, Py_ssize_t nargs,
with the additional special role for the PY_VECTORCALL_ARGUMENTS_OFFSET
bit (which is meant to solve the problem of "self" in a different way).
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