I'm thinking of a symbol type that can be used for a compiler, so a simple algebraic data type
wouldn't work. Unfortunately the GHC datatype isn't part of the GHC haskell libraries AFAICT.
Mike
Yitzchak Gale wrote:
Michael Vanier wrote:
Is there an implementation of a symbol type in Haskell i.e. a string which
has a constant-time comparison operation?
Stefan O'Rear wrote:
Yes, I beleive GHC uses one (utils/FastString.lhs iirs)
In some cases where you would need that in other languages,
you would use an algebraic data type in Haskell, e.g.:
data Color = Red | Orange | Yellow | Green | Blue | Purple
deriving (Eq, Show)
-Yitz
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