[jira] [Commented] (GROOVY-9412) enum added to List fails TypeChecked

["Eric Milles (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/GROOVY-9412?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17048388#comment-17048388 ] 

Eric Milles commented on GROOVY-9412:
-------------------------------------

This error is actually the correct and intended behavior.  List<Foo> is not covariant and so adding a Bar is an error.  If you had List<? extends Foo> you could safely add a Bar.

> enum added to List fails TypeChecked
> ------------------------------------
>
>                 Key: GROOVY-9412
>                 URL: https://issues.apache.org/jira/browse/GROOVY-9412
>             Project: Groovy
>          Issue Type: Bug
>    Affects Versions: 3.0.0, 3.0.1
>         Environment: CentOS
>            Reporter: Ian
>            Assignee: Daniel Sun
>            Priority: Major
>             Fix For: 4.0.0-alpha-1, 3.0.2
>
>          Time Spent: 1h 20m
>  Remaining Estimate: 0h
>
>  
> {code:java}
> import groovy.transform.TypeChecked
> @TypeChecked
> class MyClass {
>     interface Foo {}
>     enum Bar implements Foo {
>         AA
>     }    
>     
>     void F() {
>         List<Foo> g = []
>         g.add(Bar.AA)
>     }
> }
> new MyClass()
> {code}
> Put this in a file "script.groovy" and call "groovy script.groovy"
> Expected: No output
>  Actual: 
> {noformat}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
> <path to file>/Script.groovy: 14: [Static type checking] - Cannot call java.util.List <Foo>#add(MyClass$Foo) with arguments [MyClass$Bar] 
>  @ line 14, column 9.
>            g.add(Bar.AA)
>            ^
> 1 error{noformat}
> Does not occur in 3.0.0-rc-3 or earlier.
> Looks similar to GROOVY-8960 but does not occur in 2.5.5
> Workaround: Add cast "g.add(Bar.AA as Foo)"



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