[jira] [Updated] (GROOVY-10662) Fail to substitute type variable when encountering conflicting type parameter with a bound

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

     [ https://issues.apache.org/jira/browse/GROOVY-10662?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eric Milles updated GROOVY-10662:
---------------------------------
    Fix Version/s:     (was: 5.0.0-alpha-1)

> Fail to substitute type variable when encountering conflicting type parameter with a bound
> ------------------------------------------------------------------------------------------
>
>                 Key: GROOVY-10662
>                 URL: https://issues.apache.org/jira/browse/GROOVY-10662
>             Project: Groovy
>          Issue Type: Bug
>          Components: Static Type Checker
>            Reporter: Thodoris Sotiropoulos
>            Assignee: Eric Milles
>            Priority: Major
>             Fix For: 4.0.4
>
>
> This might be related to GROOVY-10367 and GROOVY-10309.
> I have the following program:
> {code}
> class A<X, T> {
>   A(T p1, X p2) {}
>   void foo(X x) {}
> }
> class B<T extends Number> {
>   void test() {
>     T x = (T) null;
>     Character y = (Character) 'd';
>     new A<>(y, x).foo((T) null);
>   }
> }
> {code}
> h3. Actual behaviour
> {code}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
> test.groovy: 12: [Static type checking] - Cannot find matching method A#foo(T). Please check if the declared type is correct and if the method exists.
>  @ line 12, column 5.
>        new A<>(y, x).foo((T) null);
>        ^
> 1 error
> {code}
> h3. Expected behaviour
> Compile successfully
> **Notes:** To trigger this bug, the following conditions should be met:
>   1. The second type parameter of class A must have the same name with the type parameter of class B.
>   2. We must use the diamond operator for constructing the receiver object at line 12.
> Tested against master (commit: fface1c9fe7f20a1d4c50b4cb00ead62bfaa31cb)



--
This message was sent by Atlassian Jira
(v8.20.10#820010)