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Only emit MonadHandler and MonadWidget instance for ExceptT when GHC version >= 7.10, since that's the first version tied to transformers-0.4.0.0 which introduced ExceptT

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This commit is contained in:
Ross MacLeod 2016-09-22 12:59:54 -04:00
parent ee100d7be0
commit 58fb977276
1 changed files with 4 additions and 0 deletions
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4
yesod-core/Yesod/Core/Class/Handler.hs
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@ -56,7 +56,9 @@ GO(IdentityT)
GO(ListT) GO(ListT)
GO(MaybeT) GO(MaybeT)
GOX(Error e, ErrorT e) GOX(Error e, ErrorT e)
#if __GLASGOW_HASKELL__ >= 710
GO(ExceptT e) GO(ExceptT e)
#endif
GO(ReaderT r) GO(ReaderT r)
GO(StateT s) GO(StateT s)
GOX(Monoid w, WriterT w) GOX(Monoid w, WriterT w)
@ -80,7 +82,9 @@ GO(IdentityT)
GO(ListT) GO(ListT)
GO(MaybeT) GO(MaybeT)
GOX(Error e, ErrorT e) GOX(Error e, ErrorT e)
#if __GLASGOW_HASKELL__ >= 710
GO(ExceptT e) GO(ExceptT e)
#endif
GO(ReaderT r) GO(ReaderT r)
GO(StateT s) GO(StateT s)
GOX(Monoid w, WriterT w) GOX(Monoid w, WriterT w)