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animate's Issues

Generic KeyName deriving

Currently, the key of an animation must have a manual implementation of its KeyName.
(KeyName are used for reading sprite information files.) With more sprites and more keys, this trivial work can and should be cut down.

data DinoKey
  = DinoKey'Idle
  | DinoKey'Move
  | DinoKey'Kick
  | DinoKey'Hurt
  | DinoKey'Sneak
  deriving (Show, Eq, Ord, Bounded, Enum)

instance KeyName DinoKey where
  keyName key = case key of
    DinoKey'Idle -> "Idle"
    DinoKey'Move -> "Move"
    DinoKey'Kick -> "Kick"
    DinoKey'Hurt -> "Hurt"
    DinoKey'Sneak -> "Sneak"

The KeyName instance could be created with a little bit of magic. Looking something like this:

data DinoKey
  = DinoKey'Idle
  | DinoKey'Move
  | DinoKey'Kick
  | DinoKey'Hurt
  | DinoKey'Sneak
  deriving (Show, Eq, Ord, Bounded, Enum, Generic)

instance KeyName DinoKey where
  keyName = $(genericDeriveKeyName "DinoKey'")

Or even better, like this:

data DinoKey
  = DinoKey'Idle
  | DinoKey'Move
  | DinoKey'Kick
  | DinoKey'Hurt
  | DinoKey'Sneak
  deriving (Show, Eq, Ord, Bounded, Enum, Generic, KeyName)

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