[jira] [Closed] (GROOVY-10114) Wrong type argument inference when using the result of ternary operator directly.

["Paul King (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GROOVY-10114?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Paul King closed GROOVY-10114.
------------------------------

> Wrong type argument inference when using the result of ternary operator directly.
> ---------------------------------------------------------------------------------
>
>                 Key: GROOVY-10114
>                 URL: https://issues.apache.org/jira/browse/GROOVY-10114
>             Project: Groovy
>          Issue Type: Bug
>          Components: Static compilation, Static Type Checker
>    Affects Versions: 4.0.0-alpha-2, 3.0.8
>            Reporter: Stefanos Chaliasos
>            Assignee: Eric Milles
>            Priority: Major
>             Fix For: 5.0.0-alpha-1, 4.0.2
>
>
> I have the following Groovy program.
> {code:groovy}
> @groovy.transform.TypeChecked
> class Test {
>   public static void main(String[] args) {
>     def x = ((false) ? new B<>(new A()) : new B<>(new A()))
>     x.bar.foo()
>     ((false) ? new B<A>(new A()) : new B<>(new A())).bar.foo()
>     ((false) ? new B<>(new A()) : new B<>(new A())).bar.foo()
>   }
> }
> final class A {
>   public A() {
>   }
>   final Character foo() {
>     (Character) 'g'
>   }
> }
> class B<V> {
>   public V bar
>   public B(V bar) {
>     this.bar = bar
>   }
> }
> {code}
> h2. Actual Behavior
> The program does not compile, and I get the following error.
> {code:java}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
> Test.groovy: 7: [Static type checking] - Cannot find matching method java.lang.Object#foo(). Please check if the declared type is correct and if the method exists.
>  @ line 7, column 5.
>        ((false) ? new B<>(new A()) : new B<>(new A())).bar.foo()
>        ^
> 1 error
> {code}
> h2. Expected Behavior
> Compile successfully.
> h2. Comment
> This bug seems similar to GROOVY-9983, but it doesn't use subtyping. Moreover, in versions 3.0.8 and 4.0.0-alpha-2, the compiler produces the following error (in addition to the previous error message).
> {code:java}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
> Test.groovy: 5: [Static type checking] - Cannot find matching method java.lang.Object#foo(). Please check if the declared type is correct and if the method exists.
>  @ line 5, column 5.
>        x.bar.foo()
>        ^
> {code}
> h2. Affected Version
> This programs have been tested with the compiler from the master (commit: c36c8bf3d24ce41e972e3f3e7a5763acf96f46b1), 4.0.0-alpha-2, and 3.0.8.



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