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https://issues.apache.org/jira/browse/GROOVY-8580?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul King updated GROOVY-8580:
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Priority: Blocker (was: Major)
> CLONE - Support `var` keyword of Java10 (finalise behavior of keyword under
> @CompileStatic)
> -------------------------------------------------------------------------------------------
>
> Key: GROOVY-8580
> URL: https://issues.apache.org/jira/browse/GROOVY-8580
> Project: Groovy
> Issue Type: New Feature
> Reporter: Daniel Sun
> Priority: Blocker
> Fix For: 3.x
>
>
> As part of GROOVY-8498 there is now support for the {{var}} keyword to
> provide compatibility with:
> http://openjdk.java.net/jeps/286 (Java 10)
> http://openjdk.java.net/jeps/323 (targeted for Java 11)
> For dynamic Groovy, {{var}} is an alias for {{def}}. Under
> {{@CompileStatic}}, there are three fairly obvious potential behaviors that
> could make sense for Groovy:
> * a direct alias for {{def}} in which case normal Groovy flow typing would
> apply (this is currently what is implemented but is more flexible than what
> Java developers might expect)
> * similar to the alias for {{def}} in that it allows the inferred type to
> change as further instructions are executed but it would only be allowed to
> change to sub-types of the initially inferred type (needs further
> investigation but if possible would combine some of the nice aspects of
> Groovy def and Java var behavior)
> * a direct equivalent of Java (this would be the most work and would differ
> greatly from Groovy behavior and in general would be hard to marry up with
> Groovy semantics)
> We need to finalize the behavior we want before releasing non-alpha versions
> of Groovy 3.
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