[Haskell-cafe] semantics of type synonym
Patrick.Browne at comp.dit.ie
Tue Dec 29 11:04:52 EST 2009
Stefan Holdermans wrote:
>> It seems that I need to distinguish between a theory for Haskell and a
>> given implementation (GHCi).
> What do you mean by this?
>From the responses to my query, it seems that I cannot rely totally on
the compiler for my research question which is concerned with the
meaning of Haskell constructs I will have to consult the Haskell Report.
>> Why are the GHCi commands :t "ww" and :t getName("ww") not a valid type
> I am not sure what you mean by this.
lutz at iks-jena.de wrote;
> And you do not even check for the type of "ww".
> :t snd . (\x -> (getName x, x)) $ "ww"
> ... :: String
>From the above, I though perhaps that my checks were not valid tests for
the type of the expressions.
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