[GitHub] [groovy] chrylis commented on pull request #1414: GROOVY-9803: translate generics of method reference using SAM parameters

[GitBox <gi...@apache.org>]

chrylis commented on pull request #1414:
URL: https://github.com/apache/groovy/pull/1414#issuecomment-729259561


   I'm not sure from reading the code change, but does this handle arbitrarily nested generics? The actual real-world type that the compiler is having trouble with is (combining Vavr, Spring MVC, and some of my own record types)
   
   ```
   <E, A, R> Either<JsonApiErrorResponse<E>, HeadersAndBody<JsonApiDataItemResponse<A, R>>>
   ```
   
   where invoking `Either#map` expects a `Function<? super HeadersAndBody<JsonApiDataItemResponse<A, R>>` (this part works) but the closure (or Parrot lambda) seems not to correctly preserve the nested type parameters into the closure.


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