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This was only necessary for GHC versions with base below 4.5
(i.e., ghc < 7.4).
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Don't use custom prelude for latest ghc.
This is a better approach to making 'stack ghci' and 'cabal repl'
work. Instead of using NoImplicitPrelude, we only use the custom
prelude for older ghc versions. The custom prelude presents a
uniform API that matches the current base version's prelude.
So, when developing (presumably with latest ghc), we don't
use a custom prelude at all and hence have no trouble with ghci.
The custom prelude no longer exports (<>): we now want to
match the base 4.8 prelude behavior.
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This reverts commit c423dbb5a34c2d1195020e0f0ca3aae883d0749b.
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This is needed for ghci to work with pandoc, given that we
now use a custom prelude.
Closes #2503.
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* CPP around deprecated `parseTime`.
* Text.Pandoc.Compat.Locale -> Text.Pandoc.Compat.Time,
now exports Data.Time.
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- The (non-exported) prelude is in prelude/Prelude.hs.
- It exports Monoid and Applicative, like base 4.8 prelude,
but works with older base versions.
- It exports (<>) for mappend.
- It hides 'catch' on older base versions.
This allows us to remove many imports of Data.Monoid
and Control.Applicative, and remove Text.Pandoc.Compat.Monoid.
It should allow us to use -Wall again for ghc 7.10.
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mtl switched from ErrorT to ExceptT, but we're not sure which mtl we'll
be dealing with. This should make errors work with both.
The main difference (beside the name of the module and the monad
transformer) is that Except doesn't require an instance of an Error
Typeclass. So we define that for compatability. When we switch to a
later mtl, using Control.Monad.Exception, we can just erase the instance
declaration, and all should work fine.
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This allows pandoc to compile with tagsoup 0.13.x.
Thanks to Dirk Ullrich for the patch.
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This allows pandoc to compile with base < 4.5, where Data.Monoid
doesn't export `<>`. Thanks to Dirk Ullirch for the patch.
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