Neither appending "{-# OPTIONS_GHC -fglasgow-exts -xunicodesyntax #-}" at the beginning of a .hs source file in Visual Haskell nor setting the ghc options from the project properties seems to solve the problem. I keep getting "Error 1 lexical error (UTF-8 decoding error) C:\Users\Sert\Lab\Haskell\HaskellApp1\HaskellApp1\src\Explogic.hs Line 25 Column 2 " in the IDE. Maybe this is Visual Haskell-specific o_O!? -- not (¬) :: P a => a -> Bool (¬) a | g a = False | otherwise = True Best Regards, Cetin Sert -----Original Message----- From: Don Stewart [mailto:dons@galois.com] Sent: Mittwoch, 9. Januar 2008 18:24 To: Cetin Sert Cc: Haskell-Cafe@haskell.org Subject: Re: [Haskell-cafe] Problems with Unicode Symbols as Infix Function Names in Propositional Calculus Haskell DSL cetin.sert:
I want to design a DSL in Haskell for propositional calculus. But instead of using natural language names for functions like or, and, implies etc. I want to use Unicode symbols as infix functions NOT, *, *, ->, <-> But I keep getting error messages from the GHC parser. Is there a way to make GHC parse my source files correctly? If it is not possible yet, please consider this as a "feature request".
The "survey of Haskell unicode support" might have some advice, http://blog.kfish.org/2007/10/survey-haskell-unicode-support.html See also -XUnicodeSyntax for enabling unicode keywords for -> <- forall et al. This is turning into an FAQ, so clarifying the unicode support in the GHC user's guide would be a good result. -- Don