prelude-safeenum

This is a very simple package and should be easy to install. You should be able to use any of the following standard methods to install it.

-- With cabal-install and without the source:
$> cabal install prelude-safeenum

-- With cabal-install and with the source already:
$> cd prelude-safeenum
$> cabal install

-- Without cabal-install, but with the source already:
$> cd prelude-safeenum
$> runhaskell Setup.hs configure --user
$> runhaskell Setup.hs build
$> runhaskell Setup.hs test
$> runhaskell Setup.hs haddock --hyperlink-source
$> runhaskell Setup.hs copy
$> runhaskell Setup.hs register

The test step is optional and currently does nothing. The Haddock step is also optional.

Portability

An attempt has been made to keep this library portable; however, it does rely on a few language extensions. All the required language extensions are:

CPP
GeneralizedNewtypeDeriving
MagicHash    -- only for GHC
Trustworthy  -- only for GHC >= 7.1

The GeneralizedNewtypeDeriving extension is used for brevity in Data.Number.CalkinWilf. If you'd like to use this package with a compiler that does not support that extension, contact the maintainer and it can be removed.

This package is only "Trustworthy" rather than "Safe" for two reasons: (1) Data.Number.CalkinWilf uses GeneralizedNewtypeDeriving, and (2) Prelude.SafeEnum imports GHC.Exts for build/foldr fusion and for the Char instances.

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