detail: tp_basicsize and tp_itemsize

[gvanrossum]

BPO	492349
Nosy	@gvanrossum

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/gvanrossum'
closed_at = <Date 2002-05-31.21:00:30.000>
created_at = <Date 2001-12-13.04:44:31.000>
labels = ['docs']
title = 'detail: tp_basicsize and tp_itemsize'
updated_at = <Date 2002-05-31.21:00:30.000>
user = 'https://github.com/gvanrossum'

bugs.python.org fields:

activity = <Date 2002-05-31.21:00:30.000>
actor = 'gvanrossum'
assignee = 'gvanrossum'
closed = True
closed_date = None
closer = None
components = ['Documentation']
creation = <Date 2001-12-13.04:44:31.000>
creator = 'gvanrossum'
dependencies = []
files = []
hgrepos = []
issue_num = 492349
keywords = []
message_count = 2.0
messages = ['8123', '8124']
nosy_count = 1.0
nosy_names = ['gvanrossum']
pr_nums = []
priority = 'low'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue492349'
versions = ['Python 2.2']

[gvanrossum]

Here's another question: for extensible types (which
can grow beyond
tp_basicsize), I am guessing you give no guarantees
about the aligment of
the following elements, so it's up to the programmer
to make sure that
tp_basicsize is a multiple of the alignment of
whatever's being put in the
extensible area.

If that's true, I think the docs should say so.

[gvanrossum]

Logged In: YES
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I've added a note to newtypes.tex.