On Thu, Apr 05, 2007 at 10:42:09AM -0700, John Meacham wrote: > On Sat, Mar 24, 2007 at 01:18:30PM +0100, Lennart Kolmodin wrote: > > I think the LANGUAGE pragma is much better than OPTIONS_GHC, for several > > reasons. > > > > * It's compiler independent. > > * It's clear that you're only adding extensions, not any random compiler > > flag. > > * It plays nicely with Ian's proposal on > > http://article.gmane.org/gmane.comp.lang.haskell.cabal.devel/464 > > A very big problem with the pragma as it relates to > Distribution.Extension is that it is unextensable. The definition in > Distribution.Extension really should be > > > newtype Extension = Extension String > > and the flags transformation should be something like > > > extensionsToFlags :: Compiler -> [Extension] -> ([Extension],[Opt]) > > extensionsToFlags = ... > > enumerating the compilers or allowed extensions in the API is very > limiting as well as complicating to the code. > > This is a major problem with Distribution.* in general actually that > needs to be cleaned up at some point. (Distribution2.* ?) hrm..
It would be a Very Good Idea to list the "valid" values in the haddocks, to ensure consistency. We can handle assignment with a "Find a missing extension? Invent a name and patch this list!" clause. Stefan _______________________________________________ Haskell mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell
