[GROOVY-7603] Update groovy docs for Category

• Type: Documentation
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.4.5
• Fix Version/s: 2.4.6
• Component/s: Documentation
• External issue URL: http://docs.groovy-lang.org/latest/html/gapi/groovy/lang/Category.html
• Assignee: Pascal Schumacher
• Reporter: Aseem Bansal
• Created: 26/Sep/15 00:35
• Updated: 22/Feb/16 20:48
• Resolved: 11/Oct/15 19:37

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

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

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