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Posted to notifications@groovy.apache.org by "Eric Milles (Jira)" <ji...@apache.org> on 2022/02/16 20:20:00 UTC

[jira] [Commented] (GROOVY-10494) Groovy 4 can not compile super.foo with generic interface method

    [ https://issues.apache.org/jira/browse/GROOVY-10494?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17493483#comment-17493483 ] 

Eric Milles commented on GROOVY-10494:
--------------------------------------

If you move the class {{IService}} to java, does the error subside?  Default interface methods convert the interface to a trait, which has different semantics.  I want to fix this for Groovy 5, but for now...

> Groovy 4 can not compile super.foo with generic interface method
> ----------------------------------------------------------------
>
>                 Key: GROOVY-10494
>                 URL: https://issues.apache.org/jira/browse/GROOVY-10494
>             Project: Groovy
>          Issue Type: Bug
>    Affects Versions: 4.0.0
>            Reporter: Xiaoguang Wang
>            Assignee: Eric Milles
>            Priority: Major
>
> {code:java}
> package com.company.test
> import groovy.transform.CompileStatic
> @CompileStatic
> interface IService<T> {
>     default void save(T entity) {
>         System.out.println(entity);
>     }
> }
> @CompileStatic
> interface IServiceString {
>     default void save(String entity) {
>         System.out.println(entity);
>     }
> }
> @CompileStatic
> class TestGenericGroovy implements IService<String> {
>     void save(String entity) {
>         // IService<String>.super.save(entity) // works
>         super.save(entity) // doesn't work: Groovyc: [Static type checking] - Abstract method save(T) cannot be called directly
>     }
>     static void main(String[] args) {
>         new TestGenericGroovy().save("test")
>     }
> }
>  {code}



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