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

Vo Minh Thu noteed at gmail.com
Thu Feb 19 15:07:26 UTC 2015

This example

    infix <op> a b c d → a <op> b <op> c <op> d

makes me thing to the Lisp (+ a b c d) s-expression...

And indeed your infix keyword could be replaced by something like

    ⟨<op> a b c d⟩ → a <op> b <op> c <op> d

Voilà, s-expressions part of Haskell syntax !

2015-02-19 15:51 GMT+01:00 Christopher Done <chrisdone at gmail.com>:
> Ahoy,
> The idiom discussion brought back to mind a general problem (well, for
> me) in Haskell syntax which is there is no syntactic sugar for
> interspersing operators to many arguments.
> Regarding a solution for this, I wrote up a wee proposal here:
> https://gist.github.com/chrisdone/d9d33e4770a2fef19ad1
> If I go ahead and implement this in GHC as -XInfixExpressions or
> something (better names welcome), would it be likely to be accepted? I
> could first do an implementation in haskell-src-exts to demonstrate
> the concept.
> Ciao!
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