typerep-map-0.3.2: Efficient implementation of a dependent map with types as keys

A dependent map from type representations to values of these types.

Here is an illustration of such a map:

    TMap
---------------
 Int  -> 5
 Bool -> True
 Char -> 'x'

In addition to TMap, we provide TypeRepMap parametrized by a vinyl-style interpretation. This data structure is equivalent to DMap TypeRep, but with significantly more efficient lookups.