Which "a" should it use for "methods"?
On 4 Mar 2010, at 09:07, muneson wrote:
When writing a command-line interface I ran into type class conflicts
I don't understand. Could anyone explain why ghc 6.10.4 compiles this
methods :: (Eq a) => [(String, a)]
methods =
[ ("method1", undefined )
, ("method2", undefined)
]
but not the following?
methods :: (Eq a) => [(String, a)]
methods =
[ ("method1", undefined )
, ("method2", undefined)
]
enumerateMethodNames :: [String]
enumerateMethodNames = map fst methods
thanks,
Marcus
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