[Haskell-cafe] Classes in type declarations in Hugs

John Goerzen jgoerzen at complete.org
Tue Nov 30 11:04:34 EST 2004


I have this line:

type CPResult a = MonadError CPError m => m a

GHC (with various command-line options I'm already using) compiles this

hugs, with -98 +o, complains:

Syntax error in input (unexpected `=>')

How do I make this work both places?

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