Today I learned:
1. Plymouth—the software for displaying graphical loading animations for Linux systems—has its own custom scripting language, and
2. This dynamic type union thing is a feature of that scripting language:
It's an intersection type
@pasqui023 It's not just an intersection type, but for reasons that didn't make it into the screenshot. For example, the "inheritance" of two functions will try them sequentially to enable dynamic definition-by-cases, which is different than just dynamic intersection types.
@keweddji so it's a form of exception catch?
@pasqui023 That's a good way of thinking about it. The weirdness to me comes from exposing a specific exception-catching mechanism using the same mechanism that creates dynamic intersection types as well as hashmap unions.
It seems more that when used on non function objects it does the dual of that operation
So in a sense it is quite elegant
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