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https://issues.apache.org/jira/browse/GROOVY-10915?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Milles updated GROOVY-10915:
---------------------------------
    Summary: SC: class that provides isCase but not isNotCase  (was: DGM: class 
that provides isCase but not isNotCase)

> SC: class that provides isCase but not isNotCase
> ------------------------------------------------
>
>                 Key: GROOVY-10915
>                 URL: https://issues.apache.org/jira/browse/GROOVY-10915
>             Project: Groovy
>          Issue Type: Bug
>          Components: groovy-jdk
>    Affects Versions: 4.0.0
>            Reporter: Eric Milles
>            Priority: Major
>
> Consider the following:
> {code:groovy}
> class C {
>   boolean isCase(value) {
>     // ...
>   }
> }
> {code}
> "x in c" and "!(x in c)" will use C's {{isCase}} method.  However "x !in c" 
> will use {{DGM.isNotCase(c,x)}} which static dispatches to {{DGM.isCase}}.  
> The isNotCase extension methods added in Groovy 4 should probably use 
> invokeMethod to dynamic dispatch to make use of the isCase implemented by C.
> IMO it would be much simpler to ditch "isNotCase" and have "a \!in b" work 
> identically to "!(a in b)" so one cannot implement incongruent "in" and "!in" 
> handling.



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