happstack-data-0.3.3: Happstack data manipulation libraries Source code Contents Index

Happstack.Data.Migrate

Synopsis

class Migrate a b where migrate :: a -> b

Documentation

class Migrate a b where Source

Migrate instances are needed to allow upgrades of MACID state. It should be declared as instance Migrate Old New where migrate = transition_function Methods migrate :: a -> b Source

Produced by Haddock version 2.4.2