Alternative Proxy

[Edward Kmett]

We actually already put in a patch for this about 10 days ago, when the
discussion came up around U1:

https://ghc.haskell.org/trac/ghc/ticket/11650

-Edward




On Wed, Mar 9, 2016 at 5:49 PM, Fumiaki Kinoshita <fumiexcel at gmail.com>
wrote:

> This is the only possible definition...so it should exist
>
> instance Alternative Proxy where
>   empty = Proxy
>   _ <|> _ Proxy
>
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