Problem with operator beginning with @

[meditans]

Hi, ghc, without any extension enabled, permits an infix function lo begin with @, like:

> let a @: b = a
> 3 @: 4
3

However, when parsing it with haskell-src-exts-1.18.2, we have (as mentioned in https://github.com/chrisdone/hindent/issues/226):

> fmap (const ()) (parseExpWithMode parseMode "p @Int")
ParseOk ()
> fmap (const ()) (parseExpWithMode parseMode "p @: q")
ParseFailed (SrcLoc "<unknown>.hs" 1 4) "Parse error: :"

[mpickering]

Maybe you just need to add : to isOpSymbol. Perhaps you could try
yourself?

I'm not sure why GHC parses this correctly as I copied the code quite
directly from GHC.

On Sun, Aug 28, 2016 at 6:34 PM, Carlo Nucera notifications@github.com
wrote:

Hi, ghc, without any extension enabled, permits an infix function lo
begin with @, like:

let a @: b = a
3 @: 43

However, when parsing it with haskell-src-exts-1.18.2, we have (as
mentioned in chrisdone/hindent#226
https://github.com/chrisdone/hindent/issues/226):

fmap (const ()) (parseExpWithMode parseMode "p @int")ParseOk ()
fmap (const ()) (parseExpWithMode parseMode "p @: q")ParseFailed (SrcLoc ".hs" 1 4) "Parse error: :"

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[meditans]

Sure, I'll take a look myself asap; I'll post eventual questions in this issue.