[jira] [Resolved] (GROOVY-4356) Static members should not be able to access class-level generic types

["Paul King (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GROOVY-4356?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Paul King resolved GROOVY-4356.
-------------------------------
       Resolution: Fixed
         Assignee: Paul King
    Fix Version/s: 2.5.0-beta-1

While technically a bug fix I will make this change just on master to target Groovy version 2.5 since even in our own code base we were sloppy with using some class-level generics within static methods - just example test code. So, there might be existing code that will (and should) break. The expectations about breakages are slightly greater for more major releases.

But feedback welcome and I am certainly open to porting back to the 2_4_X branch if there is sufficient demand.

> Static members should not be able to access class-level generic types
> ---------------------------------------------------------------------
>
>                 Key: GROOVY-4356
>                 URL: https://issues.apache.org/jira/browse/GROOVY-4356
>             Project: Groovy
>          Issue Type: Bug
>          Components: class generator
>    Affects Versions: 1.8-beta-1
>            Reporter: Roshan Dawrani
>            Assignee: Paul King
>             Fix For: 2.5.0-beta-1
>
>
> The following code compiles, but it shouldn't because T is a non-static generic type, and difference instances of Outer will have different concrete representations of T. Hence it makes no sense that static inner classes should be able to use such generic type variables.
> {code}
> class Outer<T> {
>     T ofoo
>     static class Inner {
>         T ifoo
>     }
> }
> {code}
> Similarly, all the cases below should not compile as well:
> {code}
> class Test1<T> {
>     static T f1
> }
> class Test2<T> {
>     static foo(T param1) {}
> }
> class Test3<T> {
>     static foo() {
>         T localVar1
>     }
> }
> {code}



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