[Agda] Building Agda with ghc-6.12.3: build failure on geniplate

[Dan Rosén]

Maybe getting off-topic, but the language pragma TypeSynonymInstances could
maybe have been of help there.

Cheers,
Dan

On Thu, Oct 11, 2012 at 3:11 PM, Guillaume Brunerie <
guillaume.brunerie at gmail.com> wrote:

> Hello,
> I have template-haskell-2.4.0.1 installed (I think that the latest
> version did not compile with ghc 6.12.3 so I installed the oldest
> supported version)
>
> Thanks, now I managed to compile Agda by removing the "qClassInstance"
> line, but I also had to change the line
>
> > instance Quasi U where
>
> with
>
> > instance Quasi (StateT (Map Type Dec, Map Type Bool) Q) where
>
> because I had an error saying that instance declarations cannot accept
> synonyms, or something like that.
>
> Thanks for your help,
>
> Guillaume
>
>
> On 2012/10/11 Nils Anders Danielsson <nad at chalmers.se> wrote:
> > On 2012-10-10 22:21, Guillaume Brunerie wrote:
> >>
> >> I’m trying to build Agda with ghc-6.12.3 (on the computers of the
> >> Institute for Advanced Study), but geniplate-0.6.0.2 fails to build.
> >> I’ve searched on Internet and it seems that this problem is known and
> >> that Nils Anders Danielsson has already sent a patch to make geniplate
> >> build with ghc-6.12.3 but this patch does not seem to have been
> >> applied upstream and I can’t find it anywhere.
> >>
> >> Where can I find this patch?
> >
> >
> > In my local copy of Geniplate.hs the Quasi instance is defined as
> > follows:
> >
> >   instance Quasi U where
> >       qNewName = lift . qNewName
> >       qReport b = lift . qReport b
> >       qRecover = error "Data.Generics.Geniplate: qRecover not
> implemented"
> >       qReify = lift . qReify
> >   #if MIN_VERSION_template_haskell(2,7,0)
> >       qReifyInstances n = lift . qReifyInstances n
> >   #elif MIN_VERSION_template_haskell(2,5,0)
> >       qClassInstances n = lift . qClassInstances n
> >   #endif
> >       qLocation = lift qLocation
> >       qRunIO = lift . qRunIO
> >   #if MIN_VERSION_template_haskell(2,7,0)
> >       qLookupName ns = lift . qLookupName ns
> >       qAddDependentFile = lift . qAddDependentFile
> >   #endif
> >
> > Furthermore the LANGUAGE pragma has the following form:
> >
> >   {-# LANGUAGE TemplateHaskell, MultiParamTypeClasses, FlexibleInstances,
> > TypeSynonymInstances, PatternGuards, CPP #-}
> >
> > This seems to make Geniplate work on GHC 6.12.3, 7.0.4, 7.4.2 and 7.6.1.
> >
> > --
> > /NAD
> >
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