Define Eq, Ord and NFData instances for Sample

[alexandervandenbroucke]

The Sample data type does not have instances for Eq, Ord and NFData.

The former two type classes are generally useful can can be automatically derived by GHC.

The latter type class is primarily useful when writing tests and benchmarks. The entire definition of the instance fits on two lines:

instance NFData Sample where
  rnf (Sample name labelSet value) = rnf name `seq` rnf labelSet `seq` rnf value

[ocharles]

This seems reasonable to me. Did you run into a situation where you needed these instances?

[alexandervandenbroucke]

Yes, in particular when I was writing some test-cases:

• The test framework requires NFData.
• It is useful to sort the samples when comparing actual and expected output values.