mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-04 00:48:58 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

bpo-38140: Document offsets in PyMemberDef (GH-16354)

Browse source 
bpo-38140: Document offsets in PyMemberDef

Co-Authored-By: Ammar Askar <ammar_askar@hotmail.com>
This commit is contained in:
Petr Viktorin 2019-09-25 13:06:16 +02:00 • committed by GitHub
parent edad4d89e3
commit 468f8a6ee0
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 17 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

13
Doc/c-api/structures.rst
View file

@ -346,6 +346,19 @@ Accessing attributes of extension types
Only :c:macro:`T_OBJECT` and :c:macro:`T_OBJECT_EX`
members can be deleted. (They are set to *NULL*).
.. _pymemberdef-offsets:
Heap allocated types (created using :c:func:`PyType_FromSpec` or similar),
``PyMemberDef`` may contain defintitions for the special members
``__dictoffset__`` and ``__weaklistoffset__``, corresponding to
:c:member:`~PyTypeObject.tp_dictoffset` and
:c:member:`~PyTypeObject.tp_weaklistoffset` in type objects.
These must be defined with ``T_PYSSIZET`` and ``READONLY``, for example::
static PyMemberDef spam_type_members[] = {
{"__dictoffset__", T_PYSSIZET, offsetof(Spam_object, dict), READONLY},
{NULL} /* Sentinel */
};
.. c:type:: PyGetSetDef