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https://issues.apache.org/jira/browse/JEXL-275?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17133537#comment-17133537
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Henri Biestro commented on JEXL-275:
------------------------------------
Changeset: c70235e2ff12371bed4aca356de4abdf7d7bf64c
Author: henrib <[email protected]>
Date: 2020-06-10 13:50
Message: JEXL-275: lexical shade does not trigger undefined var if safe mode
is true
> Allow safe navigation as option
> -------------------------------
>
> Key: JEXL-275
> URL: https://issues.apache.org/jira/browse/JEXL-275
> Project: Commons JEXL
> Issue Type: Improvement
> Affects Versions: 3.1
> Reporter: Henri Biestro
> Assignee: Henri Biestro
> Priority: Major
> Fix For: 3.2
>
>
> WHAT:
> The 'safe navigation' operator (?.) - allowing a null property to stop and
> return null in a navigation expression - has been introduced. However, in
> many occasions, being able to let the '.' and '[...]' operators behave
> 'safely' without reverting to the 'lenient' mode would be very convenient.
> Moreover, it seems 3.1 already allow 'safe' / silent navigation when calling
> methods / functions; fixing this behaviour will break existing scripts.
> Explicitly introducing this 'safe' behaviour would mitigate the (3.2)
> migration cost greatly.
> HOW:
> Builder option to set the flag, inject checking the flag when
> node.isSafeLhs(...) is used.
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