@hackage control-monad-failure-mtl0.7.1

A class for monads which can fail with an error for mtl 1 (deprecated)

A class for monads which can fail with an error. Please note: this package is only applicable for the now-deprecated mtl 1. Since mtl 2 is compatible with the transformers package, users of mtl 2 should simply use the control-monad-failure package.