alt Hacker Newsstring reversal, integer negation or toUpperCase are classical examples of functions which will not compile as `a -> a`
The function which will compile as `a -> a` is the identity function.
string reversal, integer negation or toUpperCase are classical examples of functions which will not compile as `a -> a`
The function which will compile as `a -> a` is the identity function.
That's correct, but I'm not sure how it relates to my comment as I said that `a -> a` is just an endomorphism.
identity, uppercase or negate are all endomorphisms, with identity being the only generic one.