Add methods arity and foldLeft0#261
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joroKr21 merged 3 commits intotypelevel:mainfrom Feb 26, 2025
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I am not sure foldLeft0 is the perfect or desired interface. But I am opening this PR to show that (at least to my understanding) a TypeClass like ShowType can not be implemented in the current interface. Of course one can argue that the traversal in ShowType should be done at compile time since it does not depend on any runtime types. But I have a use case where I want to have a type class that need to traverse the elements in multiple ways and being able to implement all of them using the shapeless 3 API would be useful.
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I can see the reasoning, why not. I thought internals are ignored by MiMa, need to check |
joroKr21
approved these changes
Feb 26, 2025
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I am not sure foldLeft0 is the perfect or desired interface. But I am opening this PR to show that (at least to my understanding) a TypeClass like ShowType can not be implemented in the current interface.
Of course one can argue that the traversal in ShowType should be done at compile time since it does not depend on any runtime values. But I have a use case where I want to have a type class that need to traverse the elements in multiple ways and being able to implement all of them using the shapeless 3 API would be useful.