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https://issues.apache.org/jira/browse/JEXL-367?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17530431#comment-17530431
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Henri Biestro commented on JEXL-367:
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The 'thin arrow' syntax will not be deprecated, the 'fat arrow' syntax will be
added; a JexlFeature will allow choosing the syntax you want to support. Some
of us still see Java as the base for JEXL ;) .
As a side note, I'll probably introduce 'let' as a lexical block scope variable
declaration; only equivalent to 'var' when the JexlFeatures are set that way.
This will allow a finer grain migration towards lexical scope rules (for users
with numerous gigantic scripts...).
[~dmitri_blinov] What are the differences between 'fat arrow' and function
(besides syntactic sugar); care to illustrate ?
> Deprecate -> and support =>
> ---------------------------
>
> Key: JEXL-367
> URL: https://issues.apache.org/jira/browse/JEXL-367
> Project: Commons JEXL
> Issue Type: Wish
> Affects Versions: 3.2.1
> Reporter: Hussachai Puripunpinyo
> Assignee: Henri Biestro
> Priority: Major
>
> The JEXL code surprisingly looks a lot like Javascript. I think this change
> is a good transition for folks to update the code, and it's pretty fine if
> they can tolerate using the deprecate syntax and don't mind seeing a warning
> log pop up every time.
> I'd like to propose supporting => and deprecate ->.
> The reasons are
> - JavaScript becomes very popular and many people are familiar with it.
> - JEXL is more like for a quick short script. In many scenarios, the target
> audiences are not a programer. They often mistake a language as a JavaScript
> (from my experience).
> - JEXL syntax already looks a lot like JavaScript
> -- var for variable declaration (Java added in Java 10, but JavaScript
> supports this from the beginning)
> -- The function keyword
> -- Implicit type coercion
> -- Ternary operator
> The proposed change.
> * Support => in addition to ->
> * Deprecate -> and show a warning log when it's used.
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