[Haskell-cafe] Proposal: Infix expression keyword: -XInfixExpressions

[Joachim Breitner]

Hi,

Am Donnerstag, den 19.02.2015, 16:42 +0100 schrieb Christopher Done:
> * Some things are foldable cleanly like monoids, so you can just
> mconcat [x,y,z] and that'll be inlined (I think).

the sufficiently smart compiler might do that, but not this one (GHC
7.8.4). Neither in the generic case of

foo :: Monoid a => a -> a -> a -> a -> a -> a
foo a b c d e = mconcat [a,b,c,d,e]

nor the monomophic case of 

foo :: String -> String -> String -> String -> String -> String
foo a b c d e = mconcat [a,b,c,d,e]



BTW, would your proposal extend to types? i.e.

foo :: infix (->) String String String String String
foo a b c d e = mconcat [a,b,c,d,e]

Greetings,
Joachim

-- 
Joachim “nomeata” Breitner
  mail at joachim-breitner.de • http://www.joachim-breitner.de/
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  Debian Developer: nomeata at debian.org

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