pandoc/prelude/Prelude.hs

{-# LANGUAGE PackageImports #-}
{-# LANGUAGE CPP #-}

-- This custom Prelude emulates the API of the prelude
-- with base 4.8.

module Prelude
(
  module P
#if MIN_VERSION_base(4,8,0)
#else
, Monoid(..)
, Applicative(..)
, (<$>)
, (<$)
#endif
)
where

#if MIN_VERSION_base(4,8,0)
import "base" Prelude as P
#else
import "base" Prelude as P
import Control.Applicative
import Data.Monoid
#endif
Use custom Prelude to avoid compiler warnings. - 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. 2015-10-14 09:09:10 -07:00			`{-# LANGUAGE PackageImports #-}`
			`{-# LANGUAGE CPP #-}`

Restored Text.Pandoc.Compat.Monoid. 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. 2015-11-09 11:15:11 -08:00			`-- This custom Prelude emulates the API of the prelude`
			`-- with base 4.8.`

Use custom Prelude to avoid compiler warnings. - 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. 2015-10-14 09:09:10 -07:00			`module Prelude`
			`(`
			`module P`
			`#if MIN_VERSION_base(4,8,0)`
			`#else`
Restored Text.Pandoc.Compat.Monoid. 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. 2015-11-09 11:15:11 -08:00			`, Monoid(..)`
			`, Applicative(..)`
Use custom Prelude to avoid compiler warnings. - 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. 2015-10-14 09:09:10 -07:00			`, (<$>)`
			`, (<$)`
			`#endif`
			`)`
			`where`

			`#if MIN_VERSION_base(4,8,0)`
			`import "base" Prelude as P`
			`#else`
Remove unnecessary CPP in custom Prelude. We don't have to worry about base < 4.7. 2016-09-03 15:23:32 -04:00			`import "base" Prelude as P`
Use custom Prelude to avoid compiler warnings. - 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. 2015-10-14 09:09:10 -07:00			`import Control.Applicative`
			`import Data.Monoid`
			`#endif`