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https://issues.apache.org/jira/browse/GROOVY-9779?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17212441#comment-17212441
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Eric Milles commented on GROOVY-9779:
-------------------------------------
In general "()" is considered the "call" operator and can be used to invoke the
call method of its receiver.
https://docs.groovy-lang.org/latest/html/documentation/#Operator-Overloading
I don't see any roadblocks to making the instance case work like the class
case. But I have to run through some tests to be sure.
> Inconsistency with callable properties in static context
> --------------------------------------------------------
>
> Key: GROOVY-9779
> URL: https://issues.apache.org/jira/browse/GROOVY-9779
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 3.0.6
> Reporter: Daniil Ovchinnikov
> Assignee: Eric Milles
> Priority: Major
>
> {code:title=playground.groovy}
> class C {
> def call() {
> 42
> }
> }
> class Container {
> static final staticC = new C()
> def instanceC = new C()
> }
> assert Container.staticC() == 42 // works fine
> def container = new Container()
> assert container.staticC() == 42 // MissingMethodException
> assert container.instanceC() == 42 // MissingMethodException
> {code}
> I'd expect the invocations to fail or to work in both static and instance
> contexts.
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