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https://issues.apache.org/jira/browse/GROOVY-11616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17953792#comment-17953792
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Saravanan edited comment on GROOVY-11616 at 5/24/25 3:15 AM:
-------------------------------------------------------------
This code fails with the 5.0.0 snapshot 20250515.174741-1495. I am not sure if
this fix was checked in before or after that snapshot was generated.
[~emilles] is this code change expected to fix generics as well? or is it only
to find a common base type to use. Let me know if I should open a separate issue
I am compiling this with @CompileStatic and I am not assigning it to any
variables/returning etc.
{code:java}
Arrays.asList(
new ArrayList<String>(),
new ArrayList<Long>(),
new ArrayList<Double>()
);
{code}
The error I see is
{noformat}
Cannot call <T> java.util.Arrays#asList(T[]) with arguments
[java.util.ArrayList<java.lang.String>, java.util.ArrayList<java.lang.Long>,
java.util.ArrayList<java.lang.Double>]
@ line 84, column 9.
Arrays.asList(new ArrayList<String>(), new ArrayList<Long>(), new
ArrayList<Double>());
^{noformat}
was (Author: chavan77):
This code fails with the 5.0.0 snapshot 20250515.174741-1495. I am not sure if
this fix was checked in before or after that snapshot was generated.
[~emilles] is this code change expected to fix generics as well? or is it only
to find a common base type to use
I am compiling this with @CompileStatic and I am not assigning it to any
variables/returning etc.
{code:java}
Arrays.asList(
new ArrayList<String>(),
new ArrayList<Long>(),
new ArrayList<Double>()
);
{code}
The error I see is
{noformat}
Cannot call <T> java.util.Arrays#asList(T[]) with arguments
[java.util.ArrayList<java.lang.String>, java.util.ArrayList<java.lang.Long>,
java.util.ArrayList<java.lang.Double>]
@ line 84, column 9.
Arrays.asList(new ArrayList<String>(), new ArrayList<Long>(), new
ArrayList<Double>());
^{noformat}
> Functions that take var args will default the type of the first argument,
> java tries to find the common parent type from all arguments
> --------------------------------------------------------------------------------------------------------------------------------------
>
> Key: GROOVY-11616
> URL: https://issues.apache.org/jira/browse/GROOVY-11616
> Project: Groovy
> Issue Type: Bug
> Components: Static Type Checker
> Affects Versions: 4.0.24, 5.0.0-alpha-12
> Reporter: Saravanan
> Assignee: Eric Milles
> Priority: Minor
> Fix For: 5.0.0-beta-1
>
>
>
> {code:java}
> public class Interfaces {
> class Blah {
> }
> class BlahBlah extends Blah {
> }
> class BlahBlahBlah extends Blah {
> }
> public String myThing() {
> // This fails with
> // Incompatible generic argument types. Cannot assign
> java.util.List<? extends com.org.interfaces.Interfaces.Blah>
> // to: java.util.List<com.org.interfaces.Interfaces.Blah>
> // To fix change to explicitly define generic type
> // Arrays.<Blah> asList(...)
> List<Blah> myArray = Arrays.asList(new Blah(), new BlahBlah(), new
> BlahBlahBlah(), new Blah());
> }
> }
> {code}
> Arrays.asList takes a vararg parameter. Groovy defaults to assuming that the
> first parameter type is the type (or parent type) for all parameters that
> follow. If we use instances of multiple derived types, Groovy errors out
> without trying to find the common parent type
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