Copyright	(C) 2015-2017 Ryan Scott
License	BSD-style (see the file LICENSE)
Maintainer	Ryan Scott
Portability	Template Haskell
Safe Haskell	None
Language	Haskell2010

Data.Enum.Deriving

Contents

Description

Exports functions to mechanically derive Enum instances.

Synopsis

`Enum`

Generates an Enum instance declaration for the given data type or data family instance.

Generates a lambda expression which behaves like succ (without requiring an Enum instance).

Generates a lambda expression which behaves like pred (without requiring an Enum instance).

Generates a lambda expression which behaves like toEnum (without requiring an Enum instance).

Generates a lambda expression which behaves like fromEnum (without requiring an Enum instance).

Generates a lambda expression which behaves like enumFrom (without requiring an Enum instance).

Generates a lambda expression which behaves like enumFromThen (without requiring an Enum instance).

`deriveEnum` limitations

Be aware of the following potential gotchas:

Type variables of kind * are assumed to have Enum constraints. If this is not desirable, use makeToEnum or one of its cousins.