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From "Eric Milles (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (GROOVY-7859) Erroneous method pointer expressions pass STC
Date Sat, 14 Oct 2017 15:19:00 GMT

    [ https://issues.apache.org/jira/browse/GROOVY-7859?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16204662#comment-16204662
] 

Eric Milles commented on GROOVY-7859:
-------------------------------------

I also found that {{String.&toLowerCase}} (for example) is not usable.  It results in:
{code}
assert ['ABC','XYZ'].collect(String.&toLowerCase) == ['abc','xyz']

groovy.lang.MissingMethodException: No signature of method: java.lang.String.toLowerCase()
is applicable for argument types: (java.lang.String) values: [ABC]
Possible solutions: toLowerCase(), toLowerCase(java.util.Locale), toUpperCase(), toUpperCase(java.util.Locale)
	at Script1.run(Script1.groovy:1)
{code}

Should I file a separate bug report for this?

> 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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