14 Dec
2007
14 Dec
'07
9:01 a.m.
Lutz Donnerhacke
* Peter Padawitz wrote:
I'd like to define several instances of the same type class with the same type variable instance. Only method instances differ. How can I do this without writing copies of the type class?
Define the type class in a module named "MyClass". Define the each instance in a module named "MyInstanceX" where X is a version number.
Include only the "MyInstanceX" module, you currently need.
Or, if you need more than one at the same time, wrap your data type in one newtype per instance. -k -- If I haven't seen further, it is by standing in the footprints of giants