Hi all, I was trying to do some Elm Voodoo and I stumbled upon a funny thing. It is probably deeply wrong, but I want to understand why it is wrong :-)
What I was trying to do was to define a type like this: type alias Convertor a = { convert : b -> a } Here I get "Type alias `Convertor` must declare its use of type variable b" Now, I understand, why you cannot have type alias X a = { field1: a, field2: b } But with the source type of functions, things are IMHO different than with values. You cannot write values of unbound types and you could not decide whether two instances of X are really the same type. But you can easily write functions that have unbound source types - like this one: convertString: a -> String convertString x = (toString x) ++ "_Foo" And since all of functions with this signature really have the same type at JavaScript level, two instances of 'Convertor a' would always had the same type. Now if I had c: Convertor String c = {convert = convertString} the whole thing seems type-safe... So my question is: Is this syntax forbidden, because it is an obscure feature that is not worth supporting, or would this syntax really allow for some type unsafe code? Thanks! Martin -- You received this message because you are subscribed to the Google Groups "Elm Discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to elm-discuss+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.