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https://issues.apache.org/jira/browse/GROOVY-7603?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Aseem Bansal updated GROOVY-7603:
---------------------------------
    Description: 
Category docs refer to @Mixin but they are deprecated 
http://docs.groovy-lang.org/latest/html/gapi/groovy/lang/Category.html

I found that using traits is not possible. But it would be nice to be able to 
use them. 

Tried a workaround but didn't work

{noformat}
trait Util {
    Number getTwice() { this * 2 }
    Number max(Number otherNumber) { Math.max(this, otherNumber) }
}

@groovy.lang.Category(Number)
abstract class UtilCategory implements Util {
}
{noformat}


  was:
Category docs refer to @Mixin but they are deprecated 
http://docs.groovy-lang.org/latest/html/gapi/groovy/lang/Category.html

I found that using traits is not possible. But it would be nice to be able to 
use them. 


> Update groovy docs for Category
> -------------------------------
>
>                 Key: GROOVY-7603
>                 URL: https://issues.apache.org/jira/browse/GROOVY-7603
>             Project: Groovy
>          Issue Type: Documentation
>            Reporter: Aseem Bansal
>
> Category docs refer to @Mixin but they are deprecated 
> http://docs.groovy-lang.org/latest/html/gapi/groovy/lang/Category.html
> I found that using traits is not possible. But it would be nice to be able to 
> use them. 
> Tried a workaround but didn't work
> {noformat}
> trait Util {
>     Number getTwice() { this * 2 }
>     Number max(Number otherNumber) { Math.max(this, otherNumber) }
> }
> @groovy.lang.Category(Number)
> abstract class UtilCategory implements Util {
> }
> {noformat}



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