[
https://issues.apache.org/jira/browse/GROOVY-7859?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Shil Sinha updated GROOVY-7859:
-------------------------------
Description:
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}
was:
The following currently passes static type checking:
{code}
@groovy.transform.CompileStatic
void test() {
def x = String.&length
x()
}
test()
{code}
At runtime, it fails with:
{quote}
java.lang.IllegalArgumentException: object is not an instance of declaring class
{quote}
If {{String.&length}} is replaced with {{String.&size}}, or a pointer to any
extension method, it still passes STC, but fails with a ClassCastException
instead.
> 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
>
> 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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