suggestion: add a .ehs file type

[Lennart Augustsson]

Or use a preprocessor that inserts a LANGUAGE pragma. :)

On Nov 22, 2007 9:14 AM, Simon Marlow <simonmarhaskell at gmail.com> wrote:

> Alex Jacobson wrote:
>
> > In any case, I'm pretty sure the correct answer is not 50 language
> > pragmas with arbitrary spellings for various language features at the
> > top of each source file.
>
> You probably won't like any of these, but there are many ways to avoid
> writing out all the pragmas at the top of each file.
>
> 1. Use Cabal's extensions field.
>
> 2. Use CPP
>
> MyExtensions.h:
> {-# LANGUAGE TemplateHaskell, FlexibleInstances,
>              OverlappingInstances, UndecidableInstances, CPP,
>              ScopedTypeVariables, PatternSignatures, GADTs,
>              PolymorphicComponents, FlexibleContexts,
>              MultiParamTypeClasses, DeriveDataTypeable,
>              PatternGuards #-}
>
> MyModule.hs:
> {-# LANGUAGE CPP #-}
> #include "MyExtensions.h"
>
> 3. Use a shell alias
>
> alias ghce='ghc -XTemplateHaskell -XFlexibleInstances ...'
>
> 4. use a script wrapper for GHC
>
> #!/bin/sh
> exec ghc -XTemplateHaskell -XFlexibleInstances ... $*
>
> I'm sure there are more...
>
> Cheers,
>        Simon
>
> > -Alex-
> >
> > Simon Marlow wrote:
> >> Alex Jacobson wrote:
> >>> I'm fine with that as well.  I'm just opposed to being force to look
> >>> up the precise names the compiler happens to use for each language
> >>> extension I happen to use.  Having -fglasgow-exts turned on by
> >>> default also works.
> >>
> >> -fglasgow-exts is a historical relic.  It's just an arbitrary
> >> collection of extensions.  It doesn't contain all the extensions
> >> provided by GHC, as many of them steal syntax and you probably don't
> >> want them all on at the same time.  We're trying to move away from
> >> -fglasgow-exts, which is why GHC 6.8.1 provides separate flags for all
> >> the extensions we provide. Eventually we'll have a new standard
> >> (Haskell' or whatever) that will collect many of the extensions
> >> together, so you'll just have to write {-# LANGUAGE Haskell' #-}.
> >>
> >> Cheers,
> >>     Simon
> >> _______________________________________________
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> >> Glasgow-haskell-users at haskell.org
> >> http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
> >
> >
>
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