[
https://issues.apache.org/jira/browse/GROOVY-10091?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Paul King closed GROOVY-10091.
------------------------------
> Incompatible generic argument types on closure's return type
> ------------------------------------------------------------
>
> Key: GROOVY-10091
> URL: https://issues.apache.org/jira/browse/GROOVY-10091
> Project: Groovy
> Issue Type: Bug
> Components: Static Type Checker
> Reporter: Thodoris Sotiropoulos
> Assignee: Eric Milles
> Priority: Major
> Fix For: 4.0.0-beta-1
>
>
> This is related to GROOVY-10082.
> I have the following program
>
> {code:java}
> class Foo<T> {}
> class Bar<T> extends Foo<Integer> {}
> class Baz extends Foo<Integer> {}
> public class Main {
> public static void main(String[] args) {
> Closure<Foo<Integer>> z = { -> new Baz()} // this works
> Closure<Foo<Integer>> f = { -> new Bar<String>()} // this doesn't work
> }
> }
> {code}
>
> h3. Actual Behaviour
>
> {code:java}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup
> failed:
> test.groovy: 9: [Static type checking] - Incompatible generic argument types.
> Cannot assign groovy.lang.Closure<Bar<java.lang.String>> to:
> groovy.lang.Closure<Foo<java.lang.Integer>>
> @ line 9, column 31.
> Closure<Foo<Integer>> f = { -> new Bar<String>()} // this doesn't work
> ^1 error
> {code}
> h3. Expected Behaviour
> Compile successfully
>
> Tested against
> https://github.com/apache/groovy/commit/200c0eaf4c477201429fc7dbc30557952eaa54da
>
>
>
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
