I'm using WartRemover tool to avoid possible errors in my Scala 2.11 code.
Specifically, I want to know how to fix the "Product Type Inferred" error.
Looking at the repo documentation, I can only see the failure example, but I would like to know how I'm suppose to fix that error:
https://github.com/puffnfresh/wartremover#product.
Doing my homework, I end up with this other link that explains how to fix Type Inference Failures errors https://blog.cppcabrera.com/posts/scala-wart-remover.html. And I quote "If you see any of the warnings below, the fix is usually as simple as providing type annotations" but I don't understand what that means. I really need a concrete example.
Product is a very abstract, high-level type, with very few constraints. When the inferred type is Product, that's usually an indication that you made a mistake. E.g. if you have:
List((1, "hi", 0.4f), (2, "bye"), (3, "aloha", 7.2f))
Then this will compile ok, giving you a List[Product]. But, just as when Any is inferred, this is probably a bug - you probably meant it to be a List[(Int, String, Float)] and meant to have a third entry in the middle tuple.
If you really do want a List[Product], you can avoid getting warned about it by giving the type argument explicitly:
List[Product]((1, "hi", 0.4f), (2, "bye"), (3, "aloha", 7.2f))