Argument Clinic should use "const Py_UNICODE *" for the Py_UNICODE converter

[serhiy-storchaka]

BPO	35489
Nosy	@larryhastings, @serhiy-storchaka
PRs	bpo-35489: Use "const Py_UNICODE *" for the Py_UNICODE converter in AC. #11150 [3.7] bpo-35489: Use "const Py_UNICODE *" for the Py_UNICODE converter in AC. (GH-11150). #11151

^{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/serhiy-storchaka'
closed_at = <Date 2018-12-14.09:57:23.567>
created_at = <Date 2018-12-14.08:53:53.451>
labels = ['3.8', 'type-bug', '3.7', 'expert-argument-clinic']
title = 'Argument Clinic should use "const Py_UNICODE *" for the Py_UNICODE converter'
updated_at = <Date 2018-12-14.09:57:23.566>
user = 'https://github.com/serhiy-storchaka'

bugs.python.org fields:

activity = <Date 2018-12-14.09:57:23.566>
actor = 'serhiy.storchaka'
assignee = 'serhiy.storchaka'
closed = True
closed_date = <Date 2018-12-14.09:57:23.567>
closer = 'serhiy.storchaka'
components = ['Argument Clinic']
creation = <Date 2018-12-14.08:53:53.451>
creator = 'serhiy.storchaka'
dependencies = []
files = []
hgrepos = []
issue_num = 35489
keywords = ['patch']
message_count = 3.0
messages = ['331787', '331789', '331792']
nosy_count = 2.0
nosy_names = ['larry', 'serhiy.storchaka']
pr_nums = ['11150', '11151']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue35489'
versions = ['Python 3.7', 'Python 3.8']

[serhiy-storchaka]

Format units "Z" and "Z#" in PyArg_Parse* return a pointer to immutable internal data. Therefor the result of the Py_UNICODE converter in Argument Clinic should has type "const Py_UNICODE *".

This would help to catch the bug reported in bpo-31446.

[serhiy-storchaka]

New changeset afb3e71 by Serhiy Storchaka in branch 'master':
bpo-35489: Use "const Py_UNICODE *" for the Py_UNICODE converter in AC. (GH-11150)
afb3e71

[serhiy-storchaka]

New changeset 45a7b76 by Serhiy Storchaka in branch '3.7':
[3.7] bpo-35489: Use "const Py_UNICODE *" for the Py_UNICODE converter in AC. (GH-11150). (GH-11151)
45a7b76