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Posted to notifications@groovy.apache.org by "Paul King (JIRA)" <ji...@apache.org> on 2017/09/14 06:21:00 UTC
[jira] [Commented] (GROOVY-7859) Erroneous method pointer
expressions pass STC
[ https://issues.apache.org/jira/browse/GROOVY-7859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16165804#comment-16165804 ]
Paul King commented on GROOVY-7859:
-----------------------------------
The corresponding method reference equivalent using the Parrot parser suffer from the same errors:
{code}
x = 'abc'::bar
x = String::length
x = String::size
{code}
This is to be expected given the current implementation.
> Erroneous method pointer expressions pass STC
> ---------------------------------------------
>
> Key: GROOVY-7859
> URL: https://issues.apache.org/jira/browse/GROOVY-7859
> Project: Groovy
> Issue Type: Bug
> Components: Static Type Checker
> Affects Versions: 2.4.7
> Reporter: Shil Sinha
> Assignee: Shil Sinha
>
> Method pointer expressions are not type checked (with STC enabled). The following example should not compile for a number of reasons:
> {code}
> @groovy.transform.TypeChecked
> void test() {
> def x = 'abc'.&bar //bar is not a String method
> x() // groovy.lang.MissingMethodException
> x = String.&length //length is a non-static method
> x() // java.lang.IllegalArgumentException: object is not an instance of declaring class
> x = String.&size //size is a non-static extension method
> x() // java.lang.ClassCastException: java.lang.Class cannot be cast to java.lang.String
> }
> test()
> {code}
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