[jira] [Updated] (GROOVY-10714) STC can't distinguish overloads

["Eric Milles (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GROOVY-10714?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eric Milles updated GROOVY-10714:
---------------------------------
    Fix Version/s: 3.0.13

> STC can't distinguish overloads
> -------------------------------
>
>                 Key: GROOVY-10714
>                 URL: https://issues.apache.org/jira/browse/GROOVY-10714
>             Project: Groovy
>          Issue Type: Bug
>          Components: Static compilation
>    Affects Versions: 4.0.4
>            Reporter: Christopher Smith
>            Assignee: Eric Milles
>            Priority: Minor
>             Fix For: 4.0.5, 3.0.13
>
>
> This appears to be similar to GROOVY-9881, but it's specifically in the method-overload procedure. Given a functional value type with two method overloads:
> {code}
> interface Try<T> {
>   Try<T> andThenTry(Consumer<? super T>)
>   Try<T> andThenTry(Runnable)
> }
> {code}
> When this code is invoked from static code, the STC errors out on an ambiguous method reference even if the method type isn't:
> {code}
> // AWS SDK 2 DynamoDbTable
> class DynamoDbTable {
>   void putItem(PutItemRequest<T>)
>   void putItem(Consumer<PutItemRequest.Builder<T>)
>   void putItem(T)
> }
> @CompileStatic
> class MyServiceClass {
>   void doThing() {
>     Try.success(putItemRequest())
>       .andThenTry(table::putItem) // T for Try<T> is PutItemRequest<I>
>   }
> }
> {code}
> produces
> {code}
> [Static type checking] - Reference to method is ambiguous. Cannot choose between [Try<T> Try#andThenTry(Consumer<? super T>), Try<T> Try#andThenTry(Runnable)]
> {code}
> I think this may have something to do with the relaxed SAM matching that is used to bridge ambiguous closure syntax, but when a plain method reference is used, there's no ambiguity available.



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