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https://issues.apache.org/jira/browse/GROOVY-11601?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17941752#comment-17941752
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Paul King commented on GROOVY-11601:
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Any other use cases you can think of [~blackdrag] ?
> remove support for expression list in for-each statement
> --------------------------------------------------------
>
> Key: GROOVY-11601
> URL: https://issues.apache.org/jira/browse/GROOVY-11601
> Project: Groovy
> Issue Type: Improvement
> Components: parser-antlr4
> Reporter: Eric Milles
> Assignee: Eric Milles
> Priority: Minor
>
> The for-each loop supports an arbitrary expression list. Presumably this is
> for legacy reasons. Now that multi-variable declaration is supported by
> for-each and classic for, it does not seem necessary to support expression
> list. I propose to remove it from the parser grammar.
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