[jira] [Comment Edited] (GROOVY-9244) Anonymous subclasses should cast their super-parameters

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

    [ https://issues.apache.org/jira/browse/GROOVY-9244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16927894#comment-16927894 ] 

Eric Milles edited comment on GROOVY-9244 at 9/11/19 6:41 PM:
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Since dynamic (default) Groovy supports multi-methods, it cannot tell which superclass constructor to call with the argument "null".  If you add {{@CompileStatic}} to Groovy4, the choice will be made at compile time.  The same can be done to the enclosing method or class of the anon. inner class construction.


was (Author: emilles):
Since dynamic (default) Groovy supports multi-methods, it cannot tell which superclass constructor to call with the argument "null".  If you add `@CompileStatic` to Groovy4, the choice will be made at compile time.  The same can be done to the enclosing method or class of the anon. inner class construction.

> Anonymous subclasses should cast their super-parameters
> -------------------------------------------------------
>
>                 Key: GROOVY-9244
>                 URL: https://issues.apache.org/jira/browse/GROOVY-9244
>             Project: Groovy
>          Issue Type: Bug
>    Affects Versions: 2.4.7, 2.5.7
>         Environment: I tried in GroovyConsole 2.4.7 and Groovy web console 2.5.7
>            Reporter: Björn Kautler
>            Priority: Major
>
> Given this code:
> {noformat}
>     import java.util.regex.Pattern
>     abstract class Groovy3 {
>         Groovy3(String s) { println "String" }
>         Groovy3(Pattern p) { println "Pattern" }
>     }
>     class Groovy4 extends Groovy3 {
>         Groovy4(String s) { super(s) }
>         Groovy4(Pattern p) { super(p) }
>     }
>     class Groovy5 extends Groovy3 {
>         Groovy5(String s) { super(s as String) }
>         Groovy5(Pattern p) { super(p as Pattern) }
>     }
>     class Groovy6 {
>         Groovy6(String s) { println "String" }
>         Groovy6(Pattern p) { println "Pattern" }
>     }
>     new Groovy3(null as String) { }
>     new Groovy4(null as String)
>     new Groovy5(null as String)
>     new Groovy6(null as String)
> {noformat}
> Groovy3ish anc Groovy4 instantiation fail
> Groovy5 and Groovy6 instantiation succeed and print {{String}}.
> I did not found a way to make the Groovy3ish one work, except for doing it the Groovy4 way, but no chance with an anonymous subclass.
> From what I observed, I guess the anonymous subclass does it like Groovy4 but should do it like Groovy5 to properly select the super constructor.



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