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Posted to notifications@groovy.apache.org by "Alexey Afanasiev (JIRA)" <ji...@apache.org> on 2018/08/27 09:25:00 UTC
[jira] [Commented] (GROOVY-8084) Captured types doesn't work in
@CompileStatic
[ https://issues.apache.org/jira/browse/GROOVY-8084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16593379#comment-16593379 ]
Alexey Afanasiev commented on GROOVY-8084:
------------------------------------------
Glad to see that work on type inference and generics is continuing!
> Captured types doesn't work in @CompileStatic
> ---------------------------------------------
>
> Key: GROOVY-8084
> URL: https://issues.apache.org/jira/browse/GROOVY-8084
> Project: Groovy
> Issue Type: Bug
> Components: Static compilation, Static Type Checker
> Affects Versions: 2.4.8
> Reporter: Alexey Afanasiev
> Assignee: Daniel Sun
> Priority: Major
> Fix For: 3.0.0-alpha-4, 2.5.3
>
>
> This code could be successfully compiled and executed.
> {code}
> @CompileStatic
> static def method(List<? extends Serializable> captured) {
> captured.add('some string')
> return captured
> }
> println method(new ArrayList<Integer>())
> {code}
> Looks like type check in groovy doesn't work with captured types. Is it a bug?
> Is there any documentation about generics in groovy?
> P.S.:
> Another kind of strange behaviour:
> {code}
> @CompileStatic
> static def method() {
> List<Integer> list = new ArrayList<>()
> List<? extends Serializable> captured = list
> captured.add('some string') //Error:(7, 5) Groovyc: [Static type checking] - Cannot call java.util.ArrayList <java.lang.Integer>#add(java.lang.Integer) with arguments [java.lang.String]
> return captured
> }
> {code}
> Somehow type checking infered type of 'captured' variable to java.util.ArrayList <java.lang.Integer>
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