[GitHub] [iceberg] rdblue commented on pull request #3952: Types to types (optional value instantiated) + literals

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

rdblue commented on pull request #3952:
URL: https://github.com/apache/iceberg/pull/3952#issuecomment-1019000279


   @CircArgs, I'm trying to understand the goal here. It looks like this makes the type classes both types and literals at the same time. I can now have both `Integer()` and `Integer(5)`. The first is a type. But the second is also a type, but one that is used as a literal? What is the value of mixing the two classes together?
   
   I probably don't understand the benefit, but I do see some drawbacks. First, I think that currently `Integer() == Integer()` will be `False`. That's confusing to me because I think those should be equivalent. Second, `isinstance(Integer(5), PrimitiveType)` is `True`, so the literal is reporting that it can be used as a type.


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