Proposal: Num instance for (a -> b)

[Henning Thielemann]

On Sat, 10 Nov 2018, Daniel Cartwright wrote:

> relevant reddit comment thread:https://www.reddit.com/r/haskell/comments/9vtis5/the_universe_of_discourse_i_hate_the_environment/e9f1lea?utm_so
> urce=reddit-android

https://wiki.haskell.org/index.php?title=Num_instance_for_functions&oldid=36632

In short: It would make 2(x+y) no longer a type error but equivalent to 2. 
We would lose a lot of type safety for little syntactic gain.