mtl-2.3-rc3: Backend.Base: import liftIO and forM_ directly

Not via Control.Monad.Writer.
BNFC · Feb 18, 2022 · 69e2b3b · 69e2b3b
1 parent 84c9654
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diff --git a/source/BNFC.cabal b/source/BNFC.cabal
@@ -118,6 +118,8 @@ library
     , process
     , string-qq
     , time
+    , transformers
+        -- for Control.Monad.IO.Class, which is in base >= 4.9 but not below
   if impl(ghc < 8.0)
     build-depends:
       semigroups

diff --git a/source/src/BNFC/Backend/Base.hs b/source/src/BNFC/Backend/Base.hs
@@ -16,9 +16,11 @@ module BNFC.Backend.Base
   ) where
 
 import Control.Arrow    ( (&&&) )
+import Control.Monad.IO.Class ( liftIO )
 import Control.Monad.Writer
 
 import Data.Char        ( isSpace )
+import Data.Foldable    ( forM_ )
 import Data.Function    ( on )
 import qualified Data.List as List