Message 385725 - Python tracker

➜

This issue tracker has been migrated to GitHub, and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

Author	pablogsal
Recipients	aroberge, gvanrossum, lys.nikolaou, pablogsal, serhiy.storchaka
Date	2021-01-26.16:46:27
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1611679587.65.0.468156323911.issue42997@roundup.psfhosted.org>
In-reply-to

Content
> See also issue1634034. The problem with issue1634034 is that is not anymore possible without manual changes to the grammar with the PEG parser (or new infrastructure). The new parser does not have a defined concept of "i expected this token and now I am going to hard fail because is not there", but instead it will backtrack and try something else. We also did some work on something similar and we deemed it not useful as it was: bugs.python.org/issue40599

> See also issue1634034.

The problem with issue1634034 is that is not anymore possible without manual changes to the grammar with the PEG parser (or new infrastructure). The new parser does not have a defined concept of "i expected this token and now I am going to hard fail because is not there", but instead it will backtrack and try something else. We also did some work on something similar and we deemed it not useful as it was:

bugs.python.org/issue40599

History
Date	User	Action	Args
2021-01-26 16:46:27	pablogsal	set	recipients: + pablogsal, gvanrossum, aroberge, serhiy.storchaka, lys.nikolaou
2021-01-26 16:46:27	pablogsal	set	messageid: <1611679587.65.0.468156323911.issue42997@roundup.psfhosted.org>
2021-01-26 16:46:27	pablogsal	link	issue42997 messages
2021-01-26 16:46:27	pablogsal	create