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https://issues.apache.org/jira/browse/GROOVY-8225?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17470608#comment-17470608
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Daniel Demus commented on GROOVY-8225:
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This prevents bean validation 2 from being usable on collections.
I also note that java is at 17 now, while 8 is on it's way to the
old-folks-home.
> Groovy support for JSR 308/JEP 104 (Annotations in more places)
> ---------------------------------------------------------------
>
> Key: GROOVY-8225
> URL: https://issues.apache.org/jira/browse/GROOVY-8225
> Project: Groovy
> Issue Type: New Feature
> Reporter: Paul King
> Priority: Major
>
> Now that master is on JDK 8, we should look at supporting annotations in more
> places (i.e. JSR 308 or some subset thereof).
> It will require some plugin tweaking for configuring annotation nodes and
> also some grammar changes. For the backport in
> particular, we'll need to decide whether we don't backport the relevant
> grammar changes or allow them in the grammar
> but gracefully handle them with appropriate error messages. My initial gut
> feel is we should allow them in the grammar but
> we can make that call after further investigation.
> Some other decisions that might arise.
> * Do we support just a subset of the JSR?
> * Currently we allow the type placeholder '{{def}}' to be elided if an
> annotation takes its place. Does this convention need to change with the
> additional annotation positions or do we need to clarify what happens in
> different scenarios?
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