[Haskell-cafe] Enum to String, and back?
rk at trie.org
Wed Apr 15 15:20:18 EDT 2009
On Wed, Apr 15, 2009 at 3:13 PM, michael rice <nowgate at yahoo.com> wrote:
> Using Show it is possible to establish a relationship between an enum type
> and a String type to display it.
> Can one as easily establish a reverse relationship, i.e., convert a String
> type like "Red" back to its corresponding Color type?
Make it an instance of the Read type class.
That will allow you to write -
read "Red" :: Color
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