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https://issues.apache.org/jira/browse/GROOVY-6408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Paul King closed GROOVY-6408.
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> Problem With @CompileStatic And Typed Collections
> -------------------------------------------------
>
> Key: GROOVY-6408
> URL: https://issues.apache.org/jira/browse/GROOVY-6408
> Project: Groovy
> Issue Type: Bug
> Components: Static Type Checker
> Affects Versions: 2.1.9, 2.3.0, 2.4.0-rc-1
> Reporter: Jeff Brown
> Assignee: Eric Milles
> Priority: Major
> Fix For: 4.0.0-alpha-3
>
>
> The following code compiles:
> {code:borderStyle=solid|title=Demo.groovy}
> @groovy.transform.CompileStatic
> class Demo {
> def test(Listener listener1) {
> def listener2 = new DefaultListener()
> List<Listener> listeners = [listener1, listener2]
> }
> }
> interface Listener {}
> class DefaultListener implements Listener {}
> {code}
> This also compiles:
> {code:borderStyle=solid|title=Demo.groovy}
> @groovy.transform.CompileStatic
> class Demo {
> def test(Listener listener1) {
> def listener2 = new DefaultListener()
> List<Listener> listeners = [listener1]
> }
> }
> interface Listener {}
> class DefaultListener implements Listener {}
> {code}
> This will not compile:
> {code:borderStyle=solid|title=Demo.groovy}
> @groovy.transform.CompileStatic
> class Demo {
> def test(Listener listener1) {
> def listener2 = new DefaultListener()
> List<Listener> listeners = [listener2]
> }
> }
> interface Listener {}
> class DefaultListener implements Listener {}
> {code}
> {noformat}
> staticcompiledcollection $ groovy -version
> Groovy Version: 2.1.9 JVM: 1.6.0_51 Vendor: Apple Inc. OS: Mac OS X
> staticcompiledcollection $
> staticcompiledcollection $ cat Demo.groovy
> @groovy.transform.CompileStatic
> class Demo {
> def test(Listener listener1) {
> def listener2 = new DefaultListener()
> List<Listener> listeners = [listener2]
> }
> }
> interface Listener {}
> class DefaultListener implements Listener {}
> staticcompiledcollection $
> staticcompiledcollection $ groovyc Demo.groovy
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup
> failed:
> Demo.groovy: 5: [Static type checking] - Incompatible generic argument types.
> Cannot assign java.util.List <DefaultListener> to: java.util.List <Listener>
> @ line 5, column 36.
> List<Listener> listeners = [listener2]
> ^
> 1 error
> staticcompiledcollection $
> {noformat}
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