A class for monads which can fail with an error for mtl 1 (deprecated)
|Latest on Hackage:||0.7.1|
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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.