Somebody signing messages as Felipe Lessa wrote:

OTOH, the pragma is mostly harmless for older GHC versions, while the keyword approach needs a preprocessor.

Only if *both* the old LANGUAGE pragma and the new pragma were employed, which will generate a deprecation warning for awhile and then eventually (likely) be rejected by newer GHCs, thus requiring a prepropcessor in either case. -- Stephen Paul Weber, @singpolyma See http://singpolyma.net for how I prefer to be contacted edition right joseph