Hi
Some of these can be automatically derived by the Data.Derive tool. If
you want any more, then submit a patch and they can all be derived.
http://www-users.cs.york.ac.uk/~ndm/derive/
The derivations Set, Is, From, Has, LazySet all look useful. A bit
more documentation on what each one does would also be handy, if
anyone wants to write it!
Thanks
Neil
On Nov 24, 2007 4:01 PM, Thomas Hartman
I think I'm running into more or less the same issue discussed at
http://bloggablea.wordpress.com/2007/04/24/haskell-records-considered-grungy...
Just wondering if I missed anything, or if any of the ideas considering better records setter/getters have been implemented in the meantime.
t.
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-- Is there any way to do the following more concisely? -- Seems like a lot of boilerplate
data GameState = GameState { guesses :: Int, userHighScores :: UserHighScores, answer :: Maybe Int } deriving Show
-- State Helpers --------------------------------------- modGuesses f gSt = _set_guesses ( (f . guesses) gSt) gSt modUserHighScores f gSt = _set_userHighScores ( (f . userHighScores) gSt) gSt modAnswer f gSt = _set_answer ( (f . answer) gSt) gSt
_set_guesses new gSt = gSt {guesses=new} _set_userHighScores new gSt = gSt { userHighScores=new } _set_answer new gSt = gSt { answer=new } _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe