EPA: Run exactprint transformation tests as part of CI

EPA == exact print annotations.

When !2418 landed, it did not run the tests brought over from
ghc-exactprint for making sure the AST prints correctly efter being
edited.

This enables those tests.

80 files changed, 868 insertions, 1843 deletions

diff --git a/utils/check-exact/Main.hs b/utils/check-exact/Main.hs
index d5583c6f23..23fb0a825e 100644
--- a/utils/check-exact/Main.hs
+++ b/utils/check-exact/Main.hs
@@ -1,206 +1,332 @@
+{-# LANGUAGE RankNTypes #-}
 {-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE StandaloneDeriving #-}
+{-# LANGUAGE DeriveDataTypeable #-}
+{-# OPTIONS_GHC -Wno-incomplete-uni-patterns #-}
+{-# OPTIONS_GHC -Wno-incomplete-patterns #-}
+{-# OPTIONS_GHC -Wno-orphans #-}
 
--- import Data.List
--- import GHC.Types.SrcLoc
+import Data.List
+import Data.Data
+import GHC.Types.Name.Occurrence
+import GHC.Types.Name.Reader
 import GHC hiding (moduleName)
 import GHC.Driver.Ppr
 import GHC.Driver.Session
 import GHC.Hs.Dump
--- import qualified Control.Monad.IO.Class as GHC
--- import GHC.Types.SourceText
--- import GHC.Hs.Exact hiding (ExactPrint())
--- import GHC.Utils.Outputable hiding (space)
+import GHC.Data.Bag
 import System.Environment( getArgs )
 import System.Exit
 import System.FilePath
 import System.IO
+
+import Types
+import Utils
 import ExactPrint
--- exactPrint = undefined
--- showPprUnsafe = undefined
+import Transform
+import Parsers
+
+import GHC.Parser.Lexer
+import GHC.Data.FastString
+import GHC.Types.SrcLoc
 
 -- ---------------------------------------------------------------------
 
 _tt :: IO ()
--- _tt = testOneFile "/home/alanz/mysrc/git.haskell.org/ghc/_build/stage1/lib"
-_tt = testOneFile "/home/alanz/mysrc/git.haskell.org/worktree/exactprint/_build/stage1/lib"
--- _tt = testOneFile "/home/alanz/mysrc/git.haskell.org/worktree/epw/_build/stage1/lib"
-
- -- "../../testsuite/tests/printer/Ppr001.hs"
- -- "../../testsuite/tests/printer/Ppr002.hs"
- -- "../../testsuite/tests/printer/Ppr002a.hs"
- -- "../../testsuite/tests/printer/Ppr003.hs"
- -- "../../testsuite/tests/printer/Ppr004.hs"
- -- "../../testsuite/tests/printer/Ppr005.hs"
- -- "../../testsuite/tests/qualifieddo/should_compile/qdocompile001.hs"
- -- "../../testsuite/tests/printer/Ppr006.hs"
- -- "../../testsuite/tests/printer/Ppr007.hs"
- -- "../../testsuite/tests/printer/Ppr008.hs"
- -- "../../testsuite/tests/hiefile/should_compile/hie008.hs"
- -- "../../testsuite/tests/printer/Ppr009.hs"
- -- "../../testsuite/tests/printer/Ppr011.hs"
- -- "../../testsuite/tests/printer/Ppr012.hs"
- -- "../../testsuite/tests/printer/Ppr013.hs"
- -- "../../testsuite/tests/printer/Ppr014.hs"
- -- "../../testsuite/tests/printer/Ppr015.hs"
- -- "../../testsuite/tests/printer/Ppr016.hs"
- -- "../../testsuite/tests/printer/Ppr017.hs"
- -- "../../testsuite/tests/printer/Ppr018.hs"
- -- "../../testsuite/tests/printer/Ppr019.hs"
- -- "../../testsuite/tests/printer/Ppr020.hs"
- -- "../../testsuite/tests/printer/Ppr021.hs"
- -- "../../testsuite/tests/printer/Ppr022.hs"
- -- "../../testsuite/tests/printer/Ppr023.hs"
- -- "../../testsuite/tests/printer/Ppr024.hs"
- -- "../../testsuite/tests/printer/Ppr025.hs"
- -- "../../testsuite/tests/printer/Ppr026.hs"
- -- "../../testsuite/tests/printer/Ppr027.hs"
- -- "../../testsuite/tests/printer/Ppr028.hs"
- -- "../../testsuite/tests/printer/Ppr029.hs"
- -- "../../testsuite/tests/printer/Ppr030.hs"
- -- "../../testsuite/tests/printer/Ppr031.hs"
- -- "../../testsuite/tests/printer/Ppr032.hs"
- -- "../../testsuite/tests/printer/Ppr033.hs"
- -- "../../testsuite/tests/printer/Ppr034.hs"
- -- "../../testsuite/tests/printer/Ppr035.hs"
- "../../testsuite/tests/printer/Ppr036.hs"
- -- "../../testsuite/tests/printer/Ppr037.hs"
- -- "../../testsuite/tests/printer/Ppr038.hs"
- -- "../../testsuite/tests/printer/Ppr039.hs"
- -- "../../testsuite/tests/printer/Ppr040.hs"
- -- "../../testsuite/tests/printer/Ppr041.hs"
- -- "../../testsuite/tests/printer/Ppr042.hs"
- -- "../../testsuite/tests/printer/Ppr043.hs"
- -- "../../testsuite/tests/printer/Ppr044.hs"
- -- "../../testsuite/tests/printer/Ppr045.hs"
- -- "../../testsuite/tests/printer/Ppr046.hs"
- -- Not tested, the GENERATED pragma is getting removed "../../testsuite/tests/printer/Ppr047.hs"
- -- "../../testsuite/tests/printer/Ppr048.hs"
- -- "../../testsuite/tests/printer/Ppr049.hs"
- -- "../../testsuite/tests/printer/T13050p.hs"
- -- "../../testsuite/tests/printer/T13199.hs"
- -- "../../testsuite/tests/printer/T13550.hs"
- -- "../../testsuite/tests/printer/T13942.hs"
- -- "../../testsuite/tests/printer/T14289b.hs"
- -- "../../testsuite/tests/printer/T14289c.hs"
- -- "../../testsuite/tests/printer/T14289.hs"
- -- "../../testsuite/tests/printer/T14306.hs"
- -- "../../testsuite/tests/printer/T14343b.hs"
- -- "../../testsuite/tests/printer/T14343.hs"
- -- "../../testsuite/tests/printer/T15761.hs"
- -- "../../testsuite/tests/printer/Test17519.hs"
- -- "../../testsuite/tests/printer/T18052a.hs"
- -- "../../testsuite/tests/printer/T18247a.hs"
- -- "../../testsuite/tests/printer/Ppr050.hs"
- -- "../../testsuite/tests/printer/Ppr051.hs"
- -- "../../testsuite/tests/printer/Ppr052.hs"
- -- "../../testsuite/tests/typecheck/should_fail/T17566c.hs"
- -- "../../testsuite/tests/hiefile/should_compile/Constructors.hs"
- -- "../../testsuite/tests/printer/StarBinderAnns.hs"
- -- "../../testsuite/tests/typecheck/should_fail/StrictBinds.hs"
- -- "../../testsuite/tests/printer/Test10276.hs"
- -- "../../testsuite/tests/printer/Test10278.hs"
- -- "../../testsuite/tests/printer/Test12417.hs"
- -- "../../testsuite/tests/parser/should_compile/T14189.hs"
- -- "../../testsuite/tests/printer/Test16212.hs"
- -- "../../testsuite/tests/printer/Test10312.hs"
- -- "../../testsuite/tests/printer/Test10354.hs"
- -- "../../testsuite/tests/printer/Test10357.hs"
- -- "../../testsuite/tests/printer/Test10399.hs"
- -- "../../testsuite/tests/printer/Test11018.hs"
- -- "../../testsuite/tests/printer/Test11332.hs"
- -- "../../testsuite/tests/printer/Test16230.hs"
- -- "../../testsuite/tests/printer/Test16236.hs"
- -- "../../testsuite/tests/printer/AnnotationLet.hs"
- -- "../../testsuite/tests/printer/AnnotationTuple.hs"
- -- "../../testsuite/tests/ghc-api/annotations/CommentsTest.hs"
- -- "../../testsuite/tests/hiefile/should_compile/Scopes.hs"
- -- "../../testsuite/tests/printer/Ppr053.hs"
- -- "../../testsuite/tests/printer/Ppr054.hs"
- -- "../../testsuite/tests/printer/Ppr055.hs"
- -- "../../testsuite/tests/hiefile/should_run/PatTypes.hs"
- -- "./cases/LocalDecls2.expected.hs"
- -- "./cases/WhereIn3a.hs"
- -- "./cases/AddLocalDecl1.hs"
- -- "./cases/LayoutIn1.hs"
- -- "./cases/EmptyWheres.hs"
- -- "../../testsuite/tests/printer/PprRecordDotSyntax1.hs"
- -- "../../testsuite/tests/printer/PprRecordDotSyntax2.hs"
- -- "../../testsuite/tests/printer/PprRecordDotSyntax3.hs"
- -- "../../testsuite/tests/printer/PprRecordDotSyntax4.hs"
- -- "../../testsuite/tests/printer/PprRecordDotSyntaxA.hs"
- -- "./cases/Windows.hs"
+-- _tt = testOneFile changers "/home/alanz/mysrc/git.haskell.org/ghc/_build/stage1/lib"
+_tt = testOneFile changers "/home/alanz/mysrc/git.haskell.org/worktree/exactprint/_build/stage1/lib"
+-- _tt = testOneFile changers "/home/alanz/mysrc/git.haskell.org/worktree/epw/_build/stage1/lib"
+ -- "../../testsuite/tests/ghc-api/exactprint/RenameCase1.hs" changeRenameCase1
+ -- "../../testsuite/tests/ghc-api/exactprint/LayoutLet2.hs" changeLayoutLet2
+ -- "../../testsuite/tests/ghc-api/exactprint/LayoutLet3.hs" changeLayoutLet3
+ -- "../../testsuite/tests/ghc-api/exactprint/LayoutLet4.hs" changeLayoutLet3
+ -- "../../testsuite/tests/ghc-api/exactprint/Rename1.hs" changeRename1
+ -- "../../testsuite/tests/ghc-api/exactprint/Rename2.hs" changeRename2
+ -- "../../testsuite/tests/ghc-api/exactprint/LayoutIn1.hs" changeLayoutIn1
+ -- "../../testsuite/tests/ghc-api/exactprint/LayoutIn3.hs" changeLayoutIn3
+ -- "../../testsuite/tests/ghc-api/exactprint/LayoutIn3a.hs" changeLayoutIn3
+ -- "../../testsuite/tests/ghc-api/exactprint/LayoutIn3b.hs" changeLayoutIn3
+ -- "../../testsuite/tests/ghc-api/exactprint/LayoutIn4.hs" changeLayoutIn4
+ -- "../../testsuite/tests/ghc-api/exactprint/LocToName.hs" changeLocToName
+ -- "../../testsuite/tests/ghc-api/exactprint/LetIn1.hs" changeLetIn1
+ -- "../../testsuite/tests/ghc-api/exactprint/WhereIn4.hs" changeWhereIn4
+ -- "../../testsuite/tests/ghc-api/exactprint/AddDecl1.hs" changeAddDecl1
+ -- "../../testsuite/tests/ghc-api/exactprint/AddDecl2.hs" changeAddDecl2
+ -- "../../testsuite/tests/ghc-api/exactprint/AddDecl3.hs" changeAddDecl3
+ -- "../../testsuite/tests/ghc-api/exactprint/LocalDecls.hs" changeLocalDecls
+ -- "../../testsuite/tests/ghc-api/exactprint/LocalDecls2.hs" changeLocalDecls2
+ -- "../../testsuite/tests/ghc-api/exactprint/WhereIn3a.hs" changeWhereIn3a
+ -- "../../testsuite/tests/ghc-api/exactprint/WhereIn3b.hs" changeWhereIn3b
+ -- "../../testsuite/tests/ghc-api/exactprint/AddLocalDecl1.hs" addLocaLDecl1
+ -- "../../testsuite/tests/ghc-api/exactprint/AddLocalDecl2.hs" addLocaLDecl2
+ -- "../../testsuite/tests/ghc-api/exactprint/AddLocalDecl3.hs" addLocaLDecl3
+ -- "../../testsuite/tests/ghc-api/exactprint/AddLocalDecl4.hs" addLocaLDecl4
+ -- "../../testsuite/tests/ghc-api/exactprint/AddLocalDecl5.hs" addLocaLDecl5
+ -- "../../testsuite/tests/ghc-api/exactprint/AddLocalDecl6.hs" (Just addLocaLDecl6)
+ -- "../../testsuite/tests/ghc-api/exactprint/RmDecl1.hs" rmDecl1
+ -- "../../testsuite/tests/ghc-api/exactprint/RmDecl2.hs" rmDecl2
+ -- "../../testsuite/tests/ghc-api/exactprint/RmDecl3.hs" rmDecl3
+ -- "../../testsuite/tests/ghc-api/exactprint/RmDecl4.hs" rmDecl4
+ -- "../../testsuite/tests/ghc-api/exactprint/RmDecl5.hs" rmDecl5
+ -- "../../testsuite/tests/ghc-api/exactprint/RmDecl6.hs" rmDecl6
+ -- "../../testsuite/tests/ghc-api/exactprint/RmDecl7.hs" rmDecl7
+ -- "../../testsuite/tests/ghc-api/exactprint/RmTypeSig1.hs" rmTypeSig1
+ -- "../../testsuite/tests/ghc-api/exactprint/RmTypeSig2.hs" rmTypeSig2
+ -- "../../testsuite/tests/ghc-api/exactprint/AddHiding1.hs" addHiding1
+ -- "../../testsuite/tests/ghc-api/exactprint/AddHiding2.hs" addHiding2
+ -- "../../testsuite/tests/printer/Ppr001.hs" Nothing
+
+ "../../testsuite/tests/ghc-api/annotations/CommentsTest.hs" Nothing
+ -- "../../testsuite/tests/hiefile/should_compile/Constructors.hs" Nothing
+ -- "../../testsuite/tests/hiefile/should_compile/Scopes.hs" Nothing
+ -- "../../testsuite/tests/hiefile/should_compile/hie008.hs" Nothing
+ -- "../../testsuite/tests/hiefile/should_run/PatTypes.hs" Nothing
+ -- "../../testsuite/tests/parser/should_compile/T14189.hs" Nothing
+
+ -- "../../testsuite/tests/printer/AnnotationLet.hs" Nothing
+ -- "../../testsuite/tests/printer/AnnotationTuple.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr001.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr002.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr002a.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr003.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr004.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr005.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr006.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr007.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr008.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr009.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr011.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr012.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr013.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr014.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr015.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr016.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr017.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr018.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr019.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr020.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr021.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr022.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr023.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr024.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr025.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr026.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr027.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr028.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr029.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr030.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr031.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr032.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr033.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr034.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr035.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr036.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr037.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr038.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr039.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr040.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr041.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr042.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr043.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr044.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr045.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr046.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr048.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr049.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr050.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr051.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr052.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr053.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr054.hs" Nothing
+ -- "../../testsuite/tests/printer/Ppr055.hs" Nothing
+ -- "../../testsuite/tests/printer/PprRecordDotSyntax1.hs" Nothing
+ -- "../../testsuite/tests/printer/PprRecordDotSyntax2.hs" Nothing
+ -- "../../testsuite/tests/printer/PprRecordDotSyntax3.hs" Nothing
+ -- "../../testsuite/tests/printer/PprRecordDotSyntax4.hs" Nothing
+ -- "../../testsuite/tests/printer/PprRecordDotSyntaxA.hs" Nothing
+ -- "../../testsuite/tests/printer/StarBinderAnns.hs" Nothing
+ -- "../../testsuite/tests/printer/T13050p.hs" Nothing
+ -- "../../testsuite/tests/printer/T13199.hs" Nothing
+ -- "../../testsuite/tests/printer/T13550.hs" Nothing
+ -- "../../testsuite/tests/printer/T13942.hs" Nothing
+ -- "../../testsuite/tests/printer/T14289.hs" Nothing
+ -- "../../testsuite/tests/printer/T14289b.hs" Nothing
+ -- "../../testsuite/tests/printer/T14289c.hs" Nothing
+ -- "../../testsuite/tests/printer/T14306.hs" Nothing
+ -- "../../testsuite/tests/printer/T14343.hs" Nothing
+ -- "../../testsuite/tests/printer/T14343b.hs" Nothing
+ -- "../../testsuite/tests/printer/T15761.hs" Nothing
+ -- "../../testsuite/tests/printer/T18052a.hs" Nothing
+ -- "../../testsuite/tests/printer/T18247a.hs" Nothing
+ -- "../../testsuite/tests/printer/Test10276.hs" Nothing
+ -- "../../testsuite/tests/printer/Test10278.hs" Nothing
+ -- "../../testsuite/tests/printer/Test10312.hs" Nothing
+ -- "../../testsuite/tests/printer/Test10354.hs" Nothing
+ -- "../../testsuite/tests/printer/Test10357.hs" Nothing
+ -- "../../testsuite/tests/printer/Test10399.hs" Nothing
+ -- "../../testsuite/tests/printer/Test11018.hs" Nothing
+ -- "../../testsuite/tests/printer/Test11332.hs" Nothing
+ -- "../../testsuite/tests/printer/Test12417.hs" Nothing
+ -- "../../testsuite/tests/printer/Test16212.hs" Nothing
+ -- "../../testsuite/tests/printer/Test16230.hs" Nothing
+ -- "../../testsuite/tests/printer/Test16236.hs" Nothing
+ -- "../../testsuite/tests/printer/Test17519.hs" Nothing
+
+ -- "../../testsuite/tests/qualifieddo/should_compile/qdocompile001.hs" Nothing
+ -- "../../testsuite/tests/typecheck/should_fail/StrictBinds.hs" Nothing
+ -- "../../testsuite/tests/typecheck/should_fail/T17566c.hs" Nothing
+ -- "../../testsuite/tests/ghc-api/exactprint/AddLocalDecl1.hs" Nothing
+ -- "../../testsuite/tests/ghc-api/exactprint/EmptyWheres.hs" Nothing
+ -- "../../testsuite/tests/ghc-api/exactprint/LayoutIn1.hs" Nothing
+ -- "../../testsuite/tests/ghc-api/exactprint/LocalDecls2.expected.hs" Nothing
+ -- "../../testsuite/tests/ghc-api/exactprint/WhereIn3a.hs" Nothing
+ -- "../../testsuite/tests/ghc-api/exactprint/Windows.hs" Nothing
+
+-- cloneT does not need a test, function can be retired
+
 
 -- exact = ppr
 
+changers :: [(String, Changer)]
+changers =
+  [("noChange",          noChange)
+  ,("changeRenameCase1", changeRenameCase1)
+  ,("changeLayoutLet2",  changeLayoutLet2)
+  ,("changeLayoutLet3",  changeLayoutLet3)
+  ,("changeLayoutIn1",   changeLayoutIn1)
+  ,("changeLayoutIn3",   changeLayoutIn3)
+  ,("changeLayoutIn4",   changeLayoutIn4)
+  ,("changeLocToName",   changeLocToName)
+  ,("changeRename1",     changeRename1)
+  ,("changeRename2",     changeRename2)
+  ,("changeWhereIn4",    changeWhereIn4)
+  ,("changeLetIn1",      changeLetIn1)
+  ,("changeAddDecl1",    changeAddDecl1)
+  ,("changeAddDecl2",    changeAddDecl2)
+  ,("changeAddDecl3",    changeAddDecl3)
+  ,("changeLocalDecls",  changeLocalDecls)
+  ,("changeLocalDecls2", changeLocalDecls2)
+  ,("changeWhereIn3a",   changeWhereIn3a)
+  ,("changeWhereIn3b",   changeWhereIn3b)
+  ,("ADDLOCALDECL1",     addLocaLDecl1)
+  ,("ADDLOCALDECL2",     addLocaLDecl2)
+  ,("ADDLOCALDECL3",     addLocaLDecl3)
+  ,("ADDLOCALDECL4",     addLocaLDecl4)
+  ,("ADDLOCALDECL5",     addLocaLDecl5)
+  ,("ADDLOCALDECL6",     addLocaLDecl6)
+  ,("ADDLOCALDECL6",     addLocaLDecl6)
+  ,("rmDecl1",           rmDecl1)
+  ,("rmDecl2",           rmDecl2)
+  ,("rmDecl3",           rmDecl3)
+  ,("rmDecl4",           rmDecl4)
+  ,("rmDecl5",           rmDecl5)
+  ,("rmDecl6",           rmDecl6)
+  ,("rmDecl7",           rmDecl7)
+  ,("rmTypeSig1",        rmTypeSig1)
+  ,("rmTypeSig2",        rmTypeSig2)
+  ,("addHiding1",        addHiding1)
+  ,("addHiding2",        addHiding2)
+   ]
+
 -- ---------------------------------------------------------------------
 
 usage :: String
 usage = unlines
-    [ "usage: check-exact (libdir) (file)"
+    [ "usage: check-ppr (libdir) (file)"
+    , "       check-ppr (libdir) (changer) (file)"
     , ""
     , "where libdir is the GHC library directory (e.g. the output of"
-    , "ghc --print-libdir) and file is the file to parse."
+    , "ghc --print-libdir), file is the file to parse"
+    , "and changer is an optional name of a 'changer' to modify the"
+    , " AST before printing."
     ]
 
 main :: IO()
 main = do
   args <- getArgs
   case args of
-   [libdir,fileName] -> testOneFile libdir fileName
+   [libdir,fileName] -> testOneFile changers libdir fileName Nothing
+   [libdir,fileName,changerStr] -> case lookup changerStr changers of
+     Just doChange -> testOneFile changers libdir fileName (Just doChange)
+     Nothing -> do
+       putStrLn $ "exactprint: could not find changer for [" ++ changerStr ++ "]"
+       putStrLn $ "valid changers are:\n" ++ unlines (map fst changers)
+       putStrLn $ "(see utils/check-exact/Main.hs)"
+       exitFailure
    _ -> putStrLn usage
 
+deriving instance Data Token
+deriving instance Data PsSpan
+deriving instance Data BufSpan
+deriving instance Data BufPos
+
 writeBinFile :: FilePath -> String -> IO()
 writeBinFile fpath x = withBinaryFile fpath WriteMode (\h -> hSetEncoding h utf8 >> hPutStr h x)
 
-testOneFile :: FilePath -> String -> IO ()
-testOneFile libdir fileName = do
-       p <- parseOneFile libdir fileName
-       -- putStrLn $ "\n\ngot p"
+testOneFile :: [(String, Changer)] -> FilePath -> String -> Maybe Changer -> IO ()
+testOneFile _ libdir fileName mchanger = do
+       (p,_toks) <- parseOneFile libdir fileName
+       -- putStrLn $ "\n\ngot p" ++ showAst (take 4 $ reverse toks)
        let
-         origAst = showSDocUnsafe
-                     $ showAstData BlankSrcSpanFile NoBlankApiAnnotations
-                                                         (pm_parsed_source p)
+         origAst = ppAst (pm_parsed_source p)
          anns'   = pm_annotations p
-         -- pped    = pragmas ++ "\n" ++ (exactPrint $ pm_parsed_source p)
          pped    = exactPrint (pm_parsed_source p) anns'
-         -- pragmas = getPragmas anns'
 
-         newFile = dropExtension fileName <.> "ppr" <.> takeExtension fileName
-         astFile = fileName <.> "ast"
-         newAstFile = fileName <.> "ast.new"
+         newFile         = dropExtension fileName <.> "ppr"      <.> takeExtension fileName
+         newFileChanged  = dropExtension fileName <.> "changed"  <.> takeExtension fileName
+         newFileExpected = dropExtension fileName <.> "expected" <.> takeExtension fileName
+         astFile        = fileName <.> "ast"
+         newAstFile     = fileName <.> "ast.new"
+         changedAstFile = fileName <.> "ast.changed"
 
-       -- putStrLn $ "\n\nabout to writeFile"
        writeBinFile astFile origAst
-       -- putStrLn $ "\n\nabout to pp"
        writeBinFile newFile pped
 
-       -- putStrLn $ "anns':" ++ showPprUnsafe (apiAnnRogueComments anns')
+       (changedSourceOk, expectedSource, changedSource) <- case mchanger of
+         Just changer -> do
+           (pped', ast') <- exactprintWithChange libdir changer (pm_parsed_source p) anns'
+           writeBinFile changedAstFile (ppAst ast')
+           writeBinFile newFileChanged pped'
+
+           expectedSource <- readFile newFileExpected
+           changedSource  <- readFile newFileChanged
+           return (expectedSource == changedSource, expectedSource, changedSource)
+         Nothing -> return (True, "", "")
 
-       p' <- parseOneFile libdir newFile
 
+       (p',_) <- parseOneFile libdir newFile
        let newAstStr :: String
-           newAstStr = showSDocUnsafe
-                         $ showAstData BlankSrcSpanFile NoBlankApiAnnotations
-                                                         (pm_parsed_source p')
+           newAstStr = ppAst (pm_parsed_source p')
        writeBinFile newAstFile newAstStr
 
-       -- putStrLn $ "\n\nanns':" ++ showPprUnsafe (apiAnnRogueComments anns')
 
-       if origAst == newAstStr
+       let
+         origAstOk       = origAst == newAstStr
+       if origAstOk && changedSourceOk
          then do
-           -- putStrLn "ASTs matched"
            exitSuccess
-         else do
-           putStrLn "exactPrint AST Match Failed"
-           putStrLn "\n===================================\nOrig\n\n"
-           putStrLn origAst
-           putStrLn "\n===================================\nNew\n\n"
-           putStrLn newAstStr
-           putStrLn "\n===================================\n\n"
-           exitFailure
+         else if not origAstOk
+           then do
+             putStrLn "exactPrint: AST Match Failed"
+             putStrLn "\n===================================\nOrig\n\n"
+             putStrLn origAst
+             putStrLn "\n===================================\nNew\n\n"
+             putStrLn newAstStr
+             exitFailure
+           else do
+             putStrLn "exactPrint: Changed AST Source Mismatch"
+             putStrLn "\n===================================\nExpected\n\n"
+             putStrLn expectedSource
+             putStrLn "\n===================================\nChanged\n\n"
+             putStrLn changedSource
+             putStrLn "\n===================================\n"
+             putStrLn $ show changedSourceOk
+             exitFailure
 
+ppAst :: Data a => a -> String
+ppAst ast = showSDocUnsafe $ showAstData BlankSrcSpanFile NoBlankApiAnnotations ast
 
-parseOneFile :: FilePath -> FilePath -> IO ParsedModule
+parseOneFile :: FilePath -> FilePath -> IO (ParsedModule, [Located Token])
 parseOneFile libdir fileName = do
        let modByFile m =
              case ml_hs_file $ ms_location m of
@@ -220,10 +346,11 @@ parseOneFile libdir fileName = do
                      [x] -> x
                      xs -> error $ "Can't find module, got:"
                               ++ show (map (ml_hs_file . ms_location) xs)
-         -- toks <- getRichTokenStream (ms_mod modSum)
-         -- toks <- getTokenStream (ms_mod modSum)
-         -- GHC.liftIO $ putStrLn $ "toks=" ++ showPprUnsafe toks
-         parseModule modSum
+         pm <- GHC.parseModule modSum
+         toks <- getTokenStream (ms_mod modSum)
+         return (pm, toks)
+
+         -- getTokenStream :: GhcMonad m => Module -> m [Located Token]
 
 -- getPragmas :: ApiAnns -> String
 -- getPragmas anns' = pragmaStr
@@ -240,3 +367,590 @@ parseOneFile libdir fileName = do
 -- pp a = showPpr unsafeGlobalDynFlags a
 
 -- ---------------------------------------------------------------------
+
+exactprintWithChange :: FilePath -> Changer -> ParsedSource -> ApiAnns -> IO (String, ParsedSource)
+exactprintWithChange libdir f p apiAnns = do
+  debugM $ "exactprintWithChange:apiAnns=" ++ showGhc (apiAnnRogueComments apiAnns)
+  (apiAnns',p') <- f libdir apiAnns p
+  return (exactPrint p' apiAnns', p')
+
+-- First param is libdir
+type Changer = FilePath -> (ApiAnns -> ParsedSource -> IO (ApiAnns,ParsedSource))
+
+noChange :: Changer
+noChange _libdir ans parsed = return (ans,parsed)
+
+changeRenameCase1 :: Changer
+changeRenameCase1 _libdir ans parsed = return (ans,rename "bazLonger" [((3,15),(3,18))] parsed)
+
+changeLayoutLet2 :: Changer
+changeLayoutLet2 _libdir ans parsed = return (ans,rename "xxxlonger" [((7,5),(7,8)),((8,24),(8,27))] parsed)
+
+changeLayoutLet3 :: Changer
+changeLayoutLet3 _libdir ans parsed = return (ans,rename "xxxlonger" [((7,5),(7,8)),((9,14),(9,17))] parsed)
+
+changeLayoutIn1 :: Changer
+changeLayoutIn1 _libdir ans parsed = return (ans,rename "square" [((7,17),(7,19)),((7,24),(7,26))] parsed)
+
+changeLayoutIn3 :: Changer
+changeLayoutIn3 _libdir ans parsed = return (ans,rename "anotherX" [((7,13),(7,14)),((7,37),(7,38)),((8,37),(8,38))] parsed)
+
+changeLayoutIn4 :: Changer
+changeLayoutIn4 _libdir ans parsed = return (ans,rename "io" [((7,8),(7,13)),((7,28),(7,33))] parsed)
+
+changeLocToName :: Changer
+changeLocToName _libdir ans parsed = return (ans,rename "LocToName.newPoint" [((20,1),(20,11)),((20,28),(20,38)),((24,1),(24,11))] parsed)
+
+
+changeRename1 :: Changer
+changeRename1 _libdir ans parsed = return (ans,rename "bar2" [((3,1),(3,4))] parsed)
+
+changeRename2 :: Changer
+changeRename2 _libdir ans parsed = return (ans,rename "joe" [((2,1),(2,5))] parsed)
+
+rename :: (Data a) => String -> [(Pos, Pos)] -> a -> a
+rename newNameStr spans' a
+  = everywhere (mkT replaceRdr) a
+  where
+    newName = mkRdrUnqual (mkVarOcc newNameStr)
+
+    cond :: SrcSpan -> Bool
+    cond ln = ss2range ln `elem` spans'
+
+    replaceRdr :: LocatedN RdrName -> LocatedN RdrName
+    replaceRdr (L ln _)
+        | cond (locA ln) = L ln newName
+    replaceRdr x = x
+
+-- ---------------------------------------------------------------------
+
+changeWhereIn4 :: Changer
+changeWhereIn4 _libdir ans parsed
+  = return (ans,everywhere (mkT replace) parsed)
+  where
+    replace :: LocatedN RdrName -> LocatedN RdrName
+    replace (L ln _n)
+      | ss2range (locA ln) == ((12,16),(12,17)) = L ln (mkRdrUnqual (mkVarOcc "p_2"))
+    replace x = x
+
+-- ---------------------------------------------------------------------
+
+changeLetIn1 :: Changer
+changeLetIn1 _libdir ans parsed
+  = return (ans,everywhere (mkT replace) parsed)
+  where
+    replace :: HsExpr GhcPs -> HsExpr GhcPs
+    replace (HsLet (ApiAnn anc (AnnsLet l _i) cs) localDecls expr)
+      =
+         let (HsValBinds x (ValBinds xv bagDecls sigs)) = localDecls
+             [l2,_l1] = map wrapDecl $ bagToList bagDecls
+             bagDecls' = listToBag $ concatMap decl2Bind [l2]
+             (L (SrcSpanAnn _ le) e) = expr
+             a = (SrcSpanAnn (ApiAnn (Anchor (realSrcSpan le) (MovedAnchor (DP 0 1))) mempty noCom) le)
+             expr' = L a e
+         in (HsLet (ApiAnn anc (AnnsLet l (AD (DP 1 0))) cs) (HsValBinds x (ValBinds xv bagDecls' sigs)) expr')
+
+    replace x = x
+-- ---------------------------------------------------------------------
+
+-- | Add a declaration to AddDecl
+changeAddDecl1 :: Changer
+changeAddDecl1 libdir ans top = do
+  Right (_, decl) <- withDynFlags libdir (\df -> parseDecl df "<interactive>" "nn = n2")
+  let decl' = setEntryDP' decl (DP 2 0)
+
+  let (p',(_,_),_) = runTransform mempty doAddDecl
+      doAddDecl = everywhereM (mkM replaceTopLevelDecls) top
+      replaceTopLevelDecls :: ParsedSource -> Transform ParsedSource
+      replaceTopLevelDecls m = insertAtStart m decl'
+  return (ans,p')
+
+-- ---------------------------------------------------------------------
+changeAddDecl2 :: Changer
+changeAddDecl2 libdir ans top = do
+  Right (_, decl) <- withDynFlags libdir (\df -> parseDecl df "<interactive>" "nn = n2")
+  let decl' = setEntryDP' decl (DP 2 0)
+  let top' = anchorEof top
+
+  let (p',(_,_),_) = runTransform mempty doAddDecl
+      doAddDecl = everywhereM (mkM replaceTopLevelDecls) top'
+      replaceTopLevelDecls :: ParsedSource -> Transform ParsedSource
+      replaceTopLevelDecls m = insertAtEnd m decl'
+  return (ans,p')
+
+-- ---------------------------------------------------------------------
+changeAddDecl3 :: Changer
+changeAddDecl3 libdir ans top = do
+  Right (_, decl) <- withDynFlags libdir (\df -> parseDecl df "<interactive>" "nn = n2")
+  let decl' = setEntryDP' decl (DP 2 0)
+
+  let (p',(_,_),_) = runTransform mempty doAddDecl
+      doAddDecl = everywhereM (mkM replaceTopLevelDecls) top
+      f d (l1:l2:ls) = l1:d:l2':ls
+        where
+          l2' = setEntryDP' l2 (DP 2 0)
+      replaceTopLevelDecls :: ParsedSource -> Transform ParsedSource
+      replaceTopLevelDecls m = insertAt f m decl'
+  return (ans,p')
+
+-- ---------------------------------------------------------------------
+
+-- | Add a local declaration with signature to LocalDecl
+changeLocalDecls :: Changer
+changeLocalDecls libdir ans (L l p) = do
+  Right (_, s@(L ls (SigD _ sig)))  <- withDynFlags libdir (\df -> parseDecl df "sig"  "nn :: Int")
+  Right (_, d@(L ld (ValD _ decl))) <- withDynFlags libdir (\df -> parseDecl df "decl" "nn = 2")
+  let decl' = setEntryDP' (L ld decl) (DP 1 0)
+  let  sig' = setEntryDP' (L ls sig)  (DP 0 0)
+  let (p',(_,_),_w) = runTransform mempty doAddLocal
+      doAddLocal = everywhereM (mkM replaceLocalBinds) p
+      replaceLocalBinds :: LMatch GhcPs (LHsExpr GhcPs)
+                        -> Transform (LMatch GhcPs (LHsExpr GhcPs))
+      replaceLocalBinds (L lm (Match an mln pats (GRHSs _ rhs (HsValBinds van (ValBinds _ binds sigs))))) = do
+        let oldDecls = sortLocatedA $ map wrapDecl (bagToList binds) ++ map wrapSig sigs
+        let decls = s:d:oldDecls
+        let oldDecls' = captureLineSpacing oldDecls
+        let oldBinds     = concatMap decl2Bind oldDecls'
+            (os:oldSigs) = concatMap decl2Sig  oldDecls'
+            os' = setEntryDP' os (DP 2 0)
+        let sortKey = captureOrder decls
+        let (ApiAnn anc (AnnList (Just (Anchor anc2 _)) a b c dd) cs) = van
+        let van' = (ApiAnn anc (AnnList (Just (Anchor anc2 (MovedAnchor (DP 1 4)))) a b c dd) cs)
+        let binds' = (HsValBinds van'
+                          (ValBinds sortKey (listToBag $ decl':oldBinds)
+                                          (sig':os':oldSigs)))
+        return (L lm (Match an mln pats (GRHSs noExtField rhs binds')))
+      replaceLocalBinds x = return x
+  return (ans,L l p')
+
+-- ---------------------------------------------------------------------
+
+-- | Add a local declaration with signature to LocalDecl, where there was no
+-- prior local decl. So it adds a "where" annotation.
+changeLocalDecls2 :: Changer
+changeLocalDecls2 libdir ans (L l p) = do
+  Right (_, d@(L ld (ValD _ decl))) <- withDynFlags libdir (\df -> parseDecl df "decl" "nn = 2")
+  Right (_, s@(L ls (SigD _ sig)))  <- withDynFlags libdir (\df -> parseDecl df "sig"  "nn :: Int")
+  let decl' = setEntryDP' (L ld decl) (DP 1 0)
+  let  sig' = setEntryDP' (L ls  sig) (DP 0 2)
+  let (p',(_,_),_w) = runTransform mempty doAddLocal
+      doAddLocal = everywhereM (mkM replaceLocalBinds) p
+      replaceLocalBinds :: LMatch GhcPs (LHsExpr GhcPs)
+                        -> Transform (LMatch GhcPs (LHsExpr GhcPs))
+      replaceLocalBinds (L lm (Match ma mln pats (GRHSs _ rhs EmptyLocalBinds{}))) = do
+        newSpan <- uniqueSrcSpanT
+        let anc = (Anchor (rs newSpan) (MovedAnchor (DP 1 2)))
+        let anc2 = (Anchor (rs newSpan) (MovedAnchor (DP 1 4)))
+        let an = ApiAnn anc
+                        (AnnList (Just anc2) Nothing Nothing
+                                 [(undeltaSpan (rs newSpan) AnnWhere (DP 0 0))] [])
+                        noCom
+        let decls = [s,d]
+        let sortKey = captureOrder decls
+        let binds = (HsValBinds an (ValBinds sortKey (listToBag $ [decl'])
+                                    [sig']))
+        return (L lm (Match ma mln pats (GRHSs noExtField rhs binds)))
+      replaceLocalBinds x = return x
+  return (ans,L l p')
+
+-- ---------------------------------------------------------------------
+
+-- | Check that balanceCommentsList is idempotent
+changeWhereIn3a :: Changer
+changeWhereIn3a _libdir ans (L l p) = do
+  let decls0 = hsmodDecls p
+      (decls,(_,_),w) = runTransform mempty (balanceCommentsList decls0)
+      (_de0:_:de1:_d2:_) = decls
+  debugM $ unlines w
+  debugM $ "changeWhereIn3a:de1:" ++ showAst de1
+  let p2 = p { hsmodDecls = decls}
+  return (ans,L l p2)
+
+-- ---------------------------------------------------------------------
+
+changeWhereIn3b :: Changer
+changeWhereIn3b _libdir ans (L l p) = do
+  let decls0 = hsmodDecls p
+      (decls,(_,_),w) = runTransform mempty (balanceCommentsList decls0)
+      (de0:_:de1:d2:_) = decls
+      de0' = setEntryDP' de0 (DP 2 0)
+      de1' = setEntryDP' de1 (DP 2 0)
+      d2' = setEntryDP' d2 (DP 2 0)
+      decls' = d2':de1':de0':(tail decls)
+  debugM $ unlines w
+  debugM $ "changeWhereIn3b:de1':" ++ showAst de1'
+  let p2 = p { hsmodDecls = decls'}
+  return (ans,L l p2)
+
+-- ---------------------------------------------------------------------
+
+addLocaLDecl1 :: Changer
+addLocaLDecl1 libdir ans lp = do
+  Right (_, (L ld (ValD _ decl))) <- withDynFlags libdir (\df -> parseDecl df "decl" "nn = 2")
+  let decl' = setEntryDP' (L ld decl) (DP 1 4)
+      doAddLocal = do
+        (de1:d2:d3:_) <- hsDecls lp
+        (de1'',d2') <- balanceComments de1 d2
+        (de1',_) <- modifyValD (getLocA de1'') de1'' $ \_m d -> do
+          return ((wrapDecl decl' : d),Nothing)
+        replaceDecls lp [de1', d2', d3]
+
+  (lp',(_,_),w) <- runTransformT mempty doAddLocal
+  debugM $ "addLocaLDecl1:" ++ intercalate "\n" w
+  return (ans,lp')
+
+-- ---------------------------------------------------------------------
+
+addLocaLDecl2 :: Changer
+addLocaLDecl2 libdir ans lp = do
+  Right (_, newDecl) <- withDynFlags libdir (\df -> parseDecl df "decl" "nn = 2")
+  let
+      doAddLocal = do
+         (de1:d2:_) <- hsDecls lp
+         (de1'',d2') <- balanceComments de1 d2
+
+         (parent',_) <- modifyValD (getLocA de1) de1'' $ \_m (d:ds) -> do
+           newDecl' <- transferEntryDP' d newDecl
+           let d' = setEntryDP' d (DP 1 0)
+           return ((newDecl':d':ds),Nothing)
+
+         replaceDecls lp [parent',d2']
+
+  (lp',(_,_),_w) <- runTransformT mempty doAddLocal
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+-- ---------------------------------------------------------------------
+
+addLocaLDecl3 :: Changer
+addLocaLDecl3 libdir ans lp = do
+  Right (_, newDecl) <- withDynFlags libdir (\df -> parseDecl df "decl" "nn = 2")
+  -- Right (_, newDecl@(L ld (ValD _ decl))) <- withDynFlags libdir (\df -> parseDecl df "decl" "jj = 2")
+  let
+      doAddLocal = do
+         (de1:d2:_) <- hsDecls lp
+         (de1'',d2') <- balanceComments de1 d2
+
+         (parent',_) <- modifyValD (getLocA de1) de1'' $ \_m (d:ds) -> do
+           let newDecl' = setEntryDP' newDecl (DP 1 0)
+           return (((d:ds) ++ [newDecl']),Nothing)
+
+         replaceDecls (anchorEof lp) [parent',d2']
+
+  (lp',(_,_),_w) <- runTransformT mempty doAddLocal
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+-- ---------------------------------------------------------------------
+
+addLocaLDecl4 :: Changer
+addLocaLDecl4 libdir ans lp = do
+  Right (_, newDecl) <- withDynFlags libdir (\df -> parseDecl df "decl" "nn = 2")
+  Right (_, newSig)  <- withDynFlags libdir (\df -> parseDecl df "sig"  "nn :: Int")
+  -- putStrLn $ "addLocaLDecl4:lp=" ++ showGhc lp
+  let
+      doAddLocal = do
+         (parent:ds) <- hsDecls lp
+
+         let newDecl' = setEntryDP' newDecl (DP 1 0)
+         let newSig'  = setEntryDP' newSig  (DP 1 4)
+
+         (parent',_) <- modifyValD (getLocA parent) parent $ \_m decls -> do
+           return ((decls++[newSig',newDecl']),Nothing)
+
+         replaceDecls (anchorEof lp) (parent':ds)
+
+  (lp',(_,_),_w) <- runTransformT mempty doAddLocal
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+
+-- ---------------------------------------------------------------------
+
+addLocaLDecl5 :: Changer
+addLocaLDecl5 _libdir ans lp = do
+  let
+      doAddLocal = do
+         decls <- hsDecls lp
+         [s1,de1,d2,d3] <- balanceCommentsList decls
+
+         let d3' = setEntryDP' d3 (DP 2 0)
+
+         (de1',_) <- modifyValD (getLocA de1) de1 $ \_m _decls -> do
+           let d2' = setEntryDP' d2 (DP 1 0)
+           return ([d2'],Nothing)
+         replaceDecls lp [s1,de1',d3']
+
+  (lp',(_,_),_w) <- runTransformT mempty doAddLocal
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+-- ---------------------------------------------------------------------
+
+addLocaLDecl6 :: Changer
+addLocaLDecl6 libdir ans lp = do
+  Right (_, newDecl) <- withDynFlags libdir (\df -> parseDecl df "decl" "x = 3")
+  let
+      newDecl' = setEntryDP' newDecl (DP 1 4)
+      doAddLocal = do
+        decls0 <- hsDecls lp
+        [de1'',d2] <- balanceCommentsList decls0
+
+        let de1 = captureMatchLineSpacing de1''
+        let L _ (ValD _ (FunBind _ _ (MG _ (L _ ms) _) _)) = de1
+        let [ma1,_ma2] = ms
+
+        (de1',_) <- modifyValD (getLocA ma1) de1 $ \_m decls -> do
+           return ((newDecl' : decls),Nothing)
+        replaceDecls lp [de1', d2]
+
+  (lp',(_,_),_w) <- runTransformT mempty doAddLocal
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+-- ---------------------------------------------------------------------
+
+rmDecl1 :: Changer
+rmDecl1 _libdir ans lp = do
+  let doRmDecl = do
+         tlDecs0 <- hsDecls lp
+         tlDecs <- balanceCommentsList $ captureLineSpacing tlDecs0
+         let (de1:_s1:_d2:ds) = tlDecs
+
+         replaceDecls lp (de1:ds)
+
+  (lp',(_,_),_w) <- runTransformT mempty doRmDecl
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+-- ---------------------------------------------------------------------
+
+rmDecl2 :: Changer
+rmDecl2 _libdir ans lp = do
+  let
+      doRmDecl = do
+        let
+          go :: GHC.LHsExpr GhcPs -> Transform (GHC.LHsExpr GhcPs)
+          go e@(GHC.L _ (GHC.HsLet{})) = do
+            decs0 <- hsDecls e
+            decs <- balanceCommentsList $ captureLineSpacing decs0
+            e' <- replaceDecls e (init decs)
+            return e'
+          go x = return x
+
+        everywhereM (mkM go) lp
+
+  let (lp',(_,_),_w) = runTransform mempty doRmDecl
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+-- ---------------------------------------------------------------------
+
+rmDecl3 :: Changer
+rmDecl3 _libdir ans lp = do
+  let
+      doRmDecl = do
+         [de1,d2] <- hsDecls lp
+
+         (de1',Just sd1) <- modifyValD (getLocA de1) de1 $ \_m [sd1] -> do
+           let sd1' = setEntryDP' sd1 (DP 2 0)
+           return ([],Just sd1')
+
+         replaceDecls lp [de1',sd1,d2]
+
+  (lp',(_,_),_w) <- runTransformT mempty doRmDecl
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+-- ---------------------------------------------------------------------
+
+rmDecl4 :: Changer
+rmDecl4 _libdir ans lp = do
+  let
+      doRmDecl = do
+         [de1] <- hsDecls lp
+
+         (de1',Just sd1) <- modifyValD (getLocA de1) de1 $ \_m [sd1,sd2] -> do
+           sd2' <- transferEntryDP' sd1 sd2
+
+           let sd1' = setEntryDP' sd1 (DP 2 0)
+           return ([sd2'],Just sd1')
+
+         replaceDecls (anchorEof lp) [de1',sd1]
+
+  (lp',(_,_),_w) <- runTransformT mempty doRmDecl
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+-- ---------------------------------------------------------------------
+
+rmDecl5 :: Changer
+rmDecl5 _libdir ans lp = do
+  let
+      doRmDecl = do
+        let
+          go :: HsExpr GhcPs -> Transform (HsExpr GhcPs)
+          go (HsLet a lb expr) = do
+            decs <- hsDeclsValBinds lb
+            let dec = last decs
+            _ <- transferEntryDPT (head decs) dec
+            lb' <- replaceDeclsValbinds WithoutWhere lb [dec]
+            return (HsLet a lb' expr)
+          go x = return x
+
+        everywhereM (mkM go) lp
+
+  let (lp',(_,_),_w) = runTransform mempty doRmDecl
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+-- ---------------------------------------------------------------------
+
+rmDecl6 :: Changer
+rmDecl6 _libdir ans lp = do
+  let
+      doRmDecl = do
+         [de1] <- hsDecls lp
+
+         (de1',_) <- modifyValD (getLocA de1) de1 $ \_m subDecs -> do
+           let (ss1:_sd1:sd2:sds) = subDecs
+           sd2' <- transferEntryDP' ss1 sd2
+
+           return (sd2':sds,Nothing)
+
+         replaceDecls lp [de1']
+
+  (lp',(_,_),_w) <- runTransformT mempty doRmDecl
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+-- ---------------------------------------------------------------------
+
+rmDecl7 :: Changer
+rmDecl7 _libdir ans lp = do
+  let
+      doRmDecl = do
+         tlDecs <- hsDecls lp
+         [s1,de1,d2,d3] <- balanceCommentsList tlDecs
+
+         d3' <- transferEntryDP' d2 d3
+
+         replaceDecls lp [s1,de1,d3']
+
+  (lp',(_,_),_w) <- runTransformT mempty doRmDecl
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+-- ---------------------------------------------------------------------
+
+rmTypeSig1 :: Changer
+rmTypeSig1 _libdir ans lp = do
+  let doRmDecl = do
+         tlDecs <- hsDecls lp
+         let (s0:de1:d2) = tlDecs
+             s1 = captureTypeSigSpacing s0
+             (L l (SigD x1 (TypeSig x2 [n1,n2] typ))) = s1
+         n2' <- transferEntryDP n1 n2
+         let s1' = (L l (SigD x1 (TypeSig x2 [n2'] typ)))
+         replaceDecls lp (s1':de1:d2)
+
+  let (lp',(_,_),_w) = runTransform mempty doRmDecl
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+-- ---------------------------------------------------------------------
+
+rmTypeSig2 :: Changer
+rmTypeSig2 _libdir ans lp = do
+  let doRmDecl = do
+         tlDecs <- hsDecls lp
+         let [de1] = tlDecs
+
+         (de1',_) <- modifyValD (getLocA de1) de1 $ \_m [s,d] -> do
+           d' <- transferEntryDPT s d
+           return ([d'],Nothing)
+         replaceDecls lp [de1']
+
+  let (lp',(_,_),_w) = runTransform mempty doRmDecl
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+-- ---------------------------------------------------------------------
+
+addHiding1 :: Changer
+addHiding1 _libdir ans (L l p) = do
+  let doTransform = do
+        l0 <- uniqueSrcSpanT
+        l1 <- uniqueSrcSpanT
+        l2 <- uniqueSrcSpanT
+        let
+          [L li imp1,imp2] = hsmodImports p
+          n1 = L (noAnnSrcSpanDP0 l1) (mkVarUnqual (mkFastString "n1"))
+          n2 = L (noAnnSrcSpanDP0 l2) (mkVarUnqual (mkFastString "n2"))
+          v1 = L (addComma $ noAnnSrcSpanDP0 l1) (IEVar noExtField (L (noAnnSrcSpanDP0 l1) (IEName n1)))
+          v2 = L (           noAnnSrcSpanDP0 l2) (IEVar noExtField (L (noAnnSrcSpanDP0 l2) (IEName n2)))
+          impHiding = L (SrcSpanAnn (ApiAnn (Anchor (realSrcSpan l0) m0)
+                                     (AnnList Nothing
+                                              (Just (AddApiAnn AnnOpenP  d1))
+                                              (Just (AddApiAnn AnnCloseP d0))
+                                              [(AddApiAnn AnnHiding d1)]
+                                              [])
+                                       noCom) l0) [v1,v2]
+          imp1' = imp1 { ideclHiding = Just (True,impHiding)}
+          p' = p { hsmodImports = [L li imp1',imp2]}
+        return (L l p')
+
+  let (lp',(_ans',_),_w) = runTransform mempty doTransform
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+-- ---------------------------------------------------------------------
+
+addHiding2 :: Changer
+addHiding2 _libdir ans (L l p) = do
+  let doTransform = do
+        l1 <- uniqueSrcSpanT
+        l2 <- uniqueSrcSpanT
+        let
+          [L li imp1] = hsmodImports p
+          Just (_,L lh ns) = ideclHiding imp1
+          lh' = (SrcSpanAnn (ApiAnn (Anchor (realSrcSpan (locA lh)) m0)
+                                     (AnnList Nothing
+                                              (Just (AddApiAnn AnnOpenP  d1))
+                                              (Just (AddApiAnn AnnCloseP d0))
+                                              [(AddApiAnn AnnHiding d1)]
+                                              [])
+                                       noCom) (locA lh))
+          n1 = L (noAnnSrcSpanDP0 l1) (mkVarUnqual (mkFastString "n1"))
+          n2 = L (noAnnSrcSpanDP0 l2) (mkVarUnqual (mkFastString "n2"))
+          v1 = L (addComma $ noAnnSrcSpanDP0 l1) (IEVar noExtField (L (noAnnSrcSpanDP0 l1) (IEName n1)))
+          v2 = L (           noAnnSrcSpanDP0 l2) (IEVar noExtField (L (noAnnSrcSpanDP0 l2) (IEName n2)))
+          L ln n = last ns
+          n' = L (addComma ln) n
+          imp1' = imp1 { ideclHiding = Just (True,L lh' (init ns ++ [n',v1,v2]))}
+          p' = p { hsmodImports = [L li imp1']}
+        return (L l p')
+
+  let (lp',(_ans',_),_w) = runTransform mempty doTransform
+  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
+  return (ans,lp')
+
+
+-- ---------------------------------------------------------------------
+-- From SYB
+
+-- | Apply transformation on each level of a tree.
+--
+-- Just like 'everything', this is stolen from SYB package.
+everywhere :: (forall a. Data a => a -> a) -> (forall a. Data a => a -> a)
+everywhere f = f . gmapT (everywhere f)
+
+-- | Create generic transformation.
+--
+-- Another function stolen from SYB package.
+mkT :: (Typeable a, Typeable b) => (b -> b) -> (a -> a)
+mkT f = case cast f of
+    Just f' -> f'
+    Nothing -> id
+
+-- ---------------------------------------------------------------------
diff --git a/utils/check-exact/Test.hs b/utils/check-exact/Test.hs
deleted file mode 100644
index 57c09cc737..0000000000
--- a/utils/check-exact/Test.hs
+++ /dev/null
@@ -1,840 +0,0 @@
-{-# LANGUAGE RankNTypes #-}
-{-# LANGUAGE ScopedTypeVariables #-}
-{-# LANGUAGE StandaloneDeriving #-}
-{-# LANGUAGE DeriveDataTypeable #-}
-{-# OPTIONS_GHC -Wno-incomplete-uni-patterns #-}
-{-# OPTIONS_GHC -Wno-incomplete-patterns #-}
-{-# OPTIONS_GHC -Wno-orphans #-}
-
-import Data.List
-import Data.Data
-import GHC.Types.Name.Occurrence
-import GHC.Types.Name.Reader
-import GHC hiding (moduleName)
-import GHC.Driver.Ppr
-import GHC.Driver.Session
-import GHC.Hs.Dump
-import GHC.Data.Bag
-import System.Environment( getArgs )
-import System.Exit
-import System.FilePath
-
-import Types
-import Utils
-import ExactPrint
-import Transform
-import Parsers
-
-import GHC.Parser.Lexer
-import GHC.Data.FastString
-import GHC.Types.SrcLoc
-
--- ---------------------------------------------------------------------
-
-_tt :: IO ()
--- _tt = testOneFile changers "/home/alanz/mysrc/git.haskell.org/ghc/_build/stage1/lib"
-_tt = testOneFile changers "/home/alanz/mysrc/git.haskell.org/worktree/exactprint/_build/stage1/lib"
--- _tt = testOneFile changers "/home/alanz/mysrc/git.haskell.org/worktree/epw/_build/stage1/lib"
- "cases/RenameCase1.hs" changeRenameCase1
- -- "cases/LayoutLet2.hs" changeLayoutLet2
- -- "cases/LayoutLet3.hs" changeLayoutLet3
- -- "cases/LayoutLet4.hs" changeLayoutLet3
- -- "cases/Rename1.hs" changeRename1
- -- "cases/Rename2.hs" changeRename2
- -- "cases/LayoutIn1.hs" changeLayoutIn1
- -- "cases/LayoutIn3.hs" changeLayoutIn3
- -- "cases/LayoutIn3a.hs" changeLayoutIn3
- -- "cases/LayoutIn3b.hs" changeLayoutIn3
- -- "cases/LayoutIn4.hs" changeLayoutIn4
- -- "cases/LocToName.hs" changeLocToName
- -- "cases/LetIn1.hs" changeLetIn1
- -- "cases/WhereIn4.hs" changeWhereIn4
- -- "cases/AddDecl1.hs" changeAddDecl1
- -- "cases/AddDecl2.hs" changeAddDecl2
- -- "cases/AddDecl3.hs" changeAddDecl3
- -- "cases/LocalDecls.hs" changeLocalDecls
- -- "cases/LocalDecls2.hs" changeLocalDecls2
- -- "cases/WhereIn3a.hs" changeWhereIn3a
- -- "cases/WhereIn3b.hs" changeWhereIn3b
- -- "cases/AddLocalDecl1.hs" addLocaLDecl1
- -- "cases/AddLocalDecl2.hs" addLocaLDecl2
- -- "cases/AddLocalDecl3.hs" addLocaLDecl3
- -- "cases/AddLocalDecl4.hs" addLocaLDecl4
- -- "cases/AddLocalDecl5.hs" addLocaLDecl5
- -- "cases/AddLocalDecl6.hs" addLocaLDecl6
- -- "cases/RmDecl1.hs" rmDecl1
- -- "cases/RmDecl2.hs" rmDecl2
- -- "cases/RmDecl3.hs" rmDecl3
- -- "cases/RmDecl4.hs" rmDecl4
- -- "cases/RmDecl5.hs" rmDecl5
- -- "cases/RmDecl6.hs" rmDecl6
- -- "cases/RmDecl7.hs" rmDecl7
- -- "cases/RmTypeSig1.hs" rmTypeSig1
- -- "cases/RmTypeSig2.hs" rmTypeSig2
- -- "cases/AddHiding1.hs" addHiding1
- -- "cases/AddHiding2.hs" addHiding2
-
--- cloneT does not need a test, function can be retired
-
-
--- exact = ppr
-
-changers :: [(String, Changer)]
-changers =
-  [("noChange", noChange)
-  ,("changeRenameCase1", changeRenameCase1)
-  ,("changeLayoutLet2",  changeLayoutLet2)
-  ,("changeLayoutLet3",  changeLayoutLet3)
-  ,("changeLayoutIn1",   changeLayoutIn1)
-  ,("changeLayoutIn3",   changeLayoutIn3)
-  ,("changeLayoutIn4",   changeLayoutIn4)
-  ,("changeLocToName",   changeLocToName)
-  ,("changeRename1",     changeRename1)
-  ,("changeRename2",     changeRename2)
-  ,("changeWhereIn4",    changeWhereIn4)
-  ,("changeLetIn1",      changeLetIn1)
-  ,("changeAddDecl1",    changeAddDecl1)
-  ,("changeAddDecl2",    changeAddDecl2)
-  ,("changeAddDecl3",    changeAddDecl3)
-  ,("changeLocalDecls",  changeLocalDecls)
-  ,("changeLocalDecls2", changeLocalDecls2)
-  ,("changeWhereIn3a",   changeWhereIn3a)
-  ,("changeWhereIn3b",   changeWhereIn3b)
-  ,("addLocaLDecl1",     addLocaLDecl1)
-  ,("addLocaLDecl2",     addLocaLDecl2)
-  ,("addLocaLDecl3",     addLocaLDecl3)
-  ,("addLocaLDecl4",     addLocaLDecl4)
-  ,("addLocaLDecl5",     addLocaLDecl5)
-  ,("addLocaLDecl6",     addLocaLDecl6)
-  ,("rmDecl1",           rmDecl1)
-  ,("rmDecl2",           rmDecl2)
-  ,("rmDecl3",           rmDecl3)
-  ,("rmDecl4",           rmDecl4)
-  ,("rmDecl5",           rmDecl5)
-  ,("rmDecl6",           rmDecl6)
-  ,("rmDecl7",           rmDecl7)
-  ,("rmTypeSig1",        rmTypeSig1)
-  ,("rmTypeSig2",        rmTypeSig2)
-  ,("addHiding1",        addHiding1)
-  ,("addHiding2",        addHiding2)
-  ,("addHiding2",        addHiding2)
-   ]
-
--- ---------------------------------------------------------------------
-
-usage :: String
-usage = unlines
-    [ "usage: check-ppr (libdir) (file)"
-    , ""
-    , "where libdir is the GHC library directory (e.g. the output of"
-    , "ghc --print-libdir) and file is the file to parse."
-    ]
-
-main :: IO()
-main = do
-  args <- getArgs
-  case args of
-   [libdir,fileName] -> testOneFile changers libdir fileName noChange
-   _ -> putStrLn usage
-
-deriving instance Data Token
-deriving instance Data PsSpan
-deriving instance Data BufSpan
-deriving instance Data BufPos
-
-testOneFile :: [(String, Changer)] -> FilePath -> String -> Changer -> IO ()
-testOneFile _ libdir fileName changer = do
-       (p,_toks) <- parseOneFile libdir fileName
-       -- putStrLn $ "\n\ngot p" ++ showAst (take 4 $ reverse toks)
-       let
-         origAst = ppAst (pm_parsed_source p)
-         anns'   = pm_annotations p
-         -- pped    = pragmas ++ "\n" ++ (exactPrint $ pm_parsed_source p)
-         pped    = exactPrint (pm_parsed_source p) anns'
-         -- pragmas = getPragmas anns'
-
-         newFile         = dropExtension fileName <.> "ppr"      <.> takeExtension fileName
-         newFileChanged  = dropExtension fileName <.> "changed"  <.> takeExtension fileName
-         newFileExpected = dropExtension fileName <.> "expected" <.> takeExtension fileName
-         astFile        = fileName <.> "ast"
-         newAstFile     = fileName <.> "ast.new"
-         changedAstFile = fileName <.> "ast.changed"
-
-       -- pped' <- exactprintWithChange changeRenameCase1 (pm_parsed_source p) anns'
-       (pped', ast') <- exactprintWithChange libdir changer (pm_parsed_source p) anns'
-       -- putStrLn $ "\n\nabout to writeFile"
-       writeFile changedAstFile (ppAst ast')
-       writeFile astFile origAst
-       -- putStrLn $ "\n\nabout to pp"
-       writeFile newFile        pped
-       writeFile newFileChanged pped'
-
-       -- putStrLn $ "anns':" ++ showPprUnsafe (apiAnnRogueComments anns')
-
-       (p',_) <- parseOneFile libdir newFile
-
-       let newAstStr :: String
-           newAstStr = ppAst (pm_parsed_source p')
-       writeFile newAstFile newAstStr
-       expectedSource <- readFile newFileExpected
-       changedSource  <- readFile newFileChanged
-
-       -- putStrLn $ "\n\nanns':" ++ showPprUnsafe (apiAnnRogueComments anns')
-
-       let
-         origAstOk       = origAst == newAstStr
-         changedSourceOk = expectedSource == changedSource
-       if origAstOk && changedSourceOk
-         then do
-           -- putStrLn "ASTs matched"
-           exitSuccess
-         else if not origAstOk
-           then do
-             putStrLn "AST Match Failed"
-             -- putStrLn "\n===================================\nOrig\n\n"
-             -- putStrLn origAst
-             putStrLn "\n===================================\nNew\n\n"
-             putStrLn newAstStr
-             exitFailure
-           else do
-             putStrLn "Changed AST Source Mismatch"
-             putStrLn "\n===================================\nExpected\n\n"
-             putStrLn expectedSource
-             putStrLn "\n===================================\nChanged\n\n"
-             putStrLn changedSource
-             putStrLn "\n===================================\n"
-             putStrLn $ show changedSourceOk
-             exitFailure
-
-ppAst :: Data a => a -> String
-ppAst ast = showSDocUnsafe $ showAstData BlankSrcSpanFile NoBlankApiAnnotations ast
-
-parseOneFile :: FilePath -> FilePath -> IO (ParsedModule, [Located Token])
-parseOneFile libdir fileName = do
-       let modByFile m =
-             case ml_hs_file $ ms_location m of
-               Nothing -> False
-               Just fn -> fn == fileName
-       runGhc (Just libdir) $ do
-         dflags <- getSessionDynFlags
-         let dflags2 = dflags `gopt_set` Opt_KeepRawTokenStream
-         _ <- setSessionDynFlags dflags2
-         addTarget Target { targetId = TargetFile fileName Nothing
-                          , targetAllowObjCode = True
-                          , targetContents = Nothing }
-         _ <- load LoadAllTargets
-         graph <- getModuleGraph
-         let
-           modSum = case filter modByFile (mgModSummaries graph) of
-                     [x] -> x
-                     xs -> error $ "Can't find module, got:"
-                              ++ show (map (ml_hs_file . ms_location) xs)
-         pm <- GHC.parseModule modSum
-         toks <- getTokenStream (ms_mod modSum)
-         return (pm, toks)
-
-         -- getTokenStream :: GhcMonad m => Module -> m [Located Token]
-
--- getPragmas :: ApiAnns -> String
--- getPragmas anns' = pragmaStr
---   where
---     tokComment (L _ (AnnBlockComment s)) = s
---     tokComment (L _ (AnnLineComment  s)) = s
---     tokComment _ = ""
-
---     comments' = map tokComment $ sortRealLocated $ apiAnnRogueComments anns'
---     pragmas = filter (\c -> isPrefixOf "{-#" c ) comments'
---     pragmaStr = intercalate "\n" pragmas
-
--- pp :: (Outputable a) => a -> String
--- pp a = showPpr unsafeGlobalDynFlags a
-
--- ---------------------------------------------------------------------
-
-exactprintWithChange :: FilePath -> Changer -> ParsedSource -> ApiAnns -> IO (String, ParsedSource)
-exactprintWithChange libdir f p anns = do
-  debugM $ "exactprintWithChange:anns=" ++ showGhc (apiAnnRogueComments anns)
-  (anns',p') <- f libdir anns p
-  return (exactPrint p' anns', p')
-
-
--- First param is libdir
-type Changer = FilePath -> (ApiAnns -> ParsedSource -> IO (ApiAnns,ParsedSource))
-
-noChange :: Changer
-noChange _libdir ans parsed = return (ans,parsed)
-
-changeRenameCase1 :: Changer
-changeRenameCase1 _libdir ans parsed = return (ans,rename "bazLonger" [((3,15),(3,18))] parsed)
-
-changeLayoutLet2 :: Changer
-changeLayoutLet2 _libdir ans parsed = return (ans,rename "xxxlonger" [((7,5),(7,8)),((8,24),(8,27))] parsed)
-
-changeLayoutLet3 :: Changer
-changeLayoutLet3 _libdir ans parsed = return (ans,rename "xxxlonger" [((7,5),(7,8)),((9,14),(9,17))] parsed)
-
-changeLayoutIn1 :: Changer
-changeLayoutIn1 _libdir ans parsed = return (ans,rename "square" [((7,17),(7,19)),((7,24),(7,26))] parsed)
-
-changeLayoutIn3 :: Changer
-changeLayoutIn3 _libdir ans parsed = return (ans,rename "anotherX" [((7,13),(7,14)),((7,37),(7,38)),((8,37),(8,38))] parsed)
-
-changeLayoutIn4 :: Changer
-changeLayoutIn4 _libdir ans parsed = return (ans,rename "io" [((7,8),(7,13)),((7,28),(7,33))] parsed)
-
-changeLocToName :: Changer
-changeLocToName _libdir ans parsed = return (ans,rename "LocToName.newPoint" [((20,1),(20,11)),((20,28),(20,38)),((24,1),(24,11))] parsed)
-
-
-changeRename1 :: Changer
-changeRename1 _libdir ans parsed = return (ans,rename "bar2" [((3,1),(3,4))] parsed)
-
-changeRename2 :: Changer
-changeRename2 _libdir ans parsed = return (ans,rename "joe" [((2,1),(2,5))] parsed)
-
-rename :: (Data a) => String -> [(Pos, Pos)] -> a -> a
-rename newNameStr spans' a
-  = everywhere (mkT replaceRdr) a
-  where
-    newName = mkRdrUnqual (mkVarOcc newNameStr)
-
-    cond :: SrcSpan -> Bool
-    cond ln = ss2range ln `elem` spans'
-
-    replaceRdr :: LocatedN RdrName -> LocatedN RdrName
-    replaceRdr (L ln _)
-        | cond (locA ln) = L ln newName
-    replaceRdr x = x
-
--- ---------------------------------------------------------------------
-
-changeWhereIn4 :: Changer
-changeWhereIn4 _libdir ans parsed
-  = return (ans,everywhere (mkT replace) parsed)
-  where
-    replace :: LocatedN RdrName -> LocatedN RdrName
-    replace (L ln _n)
-      | ss2range (locA ln) == ((12,16),(12,17)) = L ln (mkRdrUnqual (mkVarOcc "p_2"))
-    replace x = x
-
--- ---------------------------------------------------------------------
-
-changeLetIn1 :: Changer
-changeLetIn1 _libdir ans parsed
-  = return (ans,everywhere (mkT replace) parsed)
-  where
-    replace :: HsExpr GhcPs -> HsExpr GhcPs
-    replace (HsLet (ApiAnn anc (AnnsLet l _i) cs) localDecls expr)
-      =
-         let (HsValBinds x (ValBinds xv bagDecls sigs)) = localDecls
-             [l2,_l1] = map wrapDecl $ bagToList bagDecls
-             bagDecls' = listToBag $ concatMap decl2Bind [l2]
-             (L (SrcSpanAnn _ le) e) = expr
-             a = (SrcSpanAnn (ApiAnn (Anchor (realSrcSpan le) (MovedAnchor (DP 0 1))) mempty noCom) le)
-             expr' = L a e
-         in (HsLet (ApiAnn anc (AnnsLet l (AD (DP 1 0))) cs) (HsValBinds x (ValBinds xv bagDecls' sigs)) expr')
-
-    replace x = x
--- ---------------------------------------------------------------------
-
--- | Add a declaration to AddDecl
-changeAddDecl1 :: Changer
-changeAddDecl1 libdir ans top = do
-  Right (_, decl) <- withDynFlags libdir (\df -> parseDecl df "<interactive>" "nn = n2")
-  let decl' = setEntryDP' decl (DP 2 0)
-
-  let (p',(_,_),_) = runTransform mempty doAddDecl
-      doAddDecl = everywhereM (mkM replaceTopLevelDecls) top
-      replaceTopLevelDecls :: ParsedSource -> Transform ParsedSource
-      replaceTopLevelDecls m = insertAtStart m decl'
-  return (ans,p')
-
--- ---------------------------------------------------------------------
-changeAddDecl2 :: Changer
-changeAddDecl2 libdir ans top = do
-  Right (_, decl) <- withDynFlags libdir (\df -> parseDecl df "<interactive>" "nn = n2")
-  let decl' = setEntryDP' decl (DP 2 0)
-  let top' = anchorEof top
-
-  let (p',(_,_),_) = runTransform mempty doAddDecl
-      doAddDecl = everywhereM (mkM replaceTopLevelDecls) top'
-      replaceTopLevelDecls :: ParsedSource -> Transform ParsedSource
-      replaceTopLevelDecls m = insertAtEnd m decl'
-  return (ans,p')
-
--- ---------------------------------------------------------------------
-changeAddDecl3 :: Changer
-changeAddDecl3 libdir ans top = do
-  Right (_, decl) <- withDynFlags libdir (\df -> parseDecl df "<interactive>" "nn = n2")
-  let decl' = setEntryDP' decl (DP 2 0)
-
-  let (p',(_,_),_) = runTransform mempty doAddDecl
-      doAddDecl = everywhereM (mkM replaceTopLevelDecls) top
-      f d (l1:l2:ls) = l1:d:l2':ls
-        where
-          l2' = setEntryDP' l2 (DP 2 0)
-      replaceTopLevelDecls :: ParsedSource -> Transform ParsedSource
-      replaceTopLevelDecls m = insertAt f m decl'
-  return (ans,p')
-
--- ---------------------------------------------------------------------
-
--- | Add a local declaration with signature to LocalDecl
-changeLocalDecls :: Changer
-changeLocalDecls libdir ans (L l p) = do
-  Right (_, s@(L ls (SigD _ sig)))  <- withDynFlags libdir (\df -> parseDecl df "sig"  "nn :: Int")
-  Right (_, d@(L ld (ValD _ decl))) <- withDynFlags libdir (\df -> parseDecl df "decl" "nn = 2")
-  let decl' = setEntryDP' (L ld decl) (DP 1 0)
-  let  sig' = setEntryDP' (L ls sig)  (DP 0 0)
-  let (p',(_,_),_w) = runTransform mempty doAddLocal
-      doAddLocal = everywhereM (mkM replaceLocalBinds) p
-      replaceLocalBinds :: LMatch GhcPs (LHsExpr GhcPs)
-                        -> Transform (LMatch GhcPs (LHsExpr GhcPs))
-      replaceLocalBinds (L lm (Match an mln pats (GRHSs _ rhs (HsValBinds van (ValBinds _ binds sigs))))) = do
-        let oldDecls = sortLocatedA $ map wrapDecl (bagToList binds) ++ map wrapSig sigs
-        let decls = s:d:oldDecls
-        let oldDecls' = captureLineSpacing oldDecls
-        let oldBinds     = concatMap decl2Bind oldDecls'
-            (os:oldSigs) = concatMap decl2Sig  oldDecls'
-            os' = setEntryDP' os (DP 2 0)
-        let sortKey = captureOrder decls
-        let (ApiAnn anc (AnnList (Just (Anchor anc2 _)) a b c dd) cs) = van
-        let van' = (ApiAnn anc (AnnList (Just (Anchor anc2 (MovedAnchor (DP 1 4)))) a b c dd) cs)
-        let binds' = (HsValBinds van'
-                          (ValBinds sortKey (listToBag $ decl':oldBinds)
-                                          (sig':os':oldSigs)))
-        return (L lm (Match an mln pats (GRHSs noExtField rhs binds')))
-      replaceLocalBinds x = return x
-  return (ans,L l p')
-
--- ---------------------------------------------------------------------
-
--- | Add a local declaration with signature to LocalDecl, where there was no
--- prior local decl. So it adds a "where" annotation.
-changeLocalDecls2 :: Changer
-changeLocalDecls2 libdir ans (L l p) = do
-  Right (_, d@(L ld (ValD _ decl))) <- withDynFlags libdir (\df -> parseDecl df "decl" "nn = 2")
-  Right (_, s@(L ls (SigD _ sig)))  <- withDynFlags libdir (\df -> parseDecl df "sig"  "nn :: Int")
-  let decl' = setEntryDP' (L ld decl) (DP 1 0)
-  let  sig' = setEntryDP' (L ls  sig) (DP 0 2)
-  let (p',(_,_),_w) = runTransform mempty doAddLocal
-      doAddLocal = everywhereM (mkM replaceLocalBinds) p
-      replaceLocalBinds :: LMatch GhcPs (LHsExpr GhcPs)
-                        -> Transform (LMatch GhcPs (LHsExpr GhcPs))
-      replaceLocalBinds (L lm (Match ma mln pats (GRHSs _ rhs EmptyLocalBinds{}))) = do
-        newSpan <- uniqueSrcSpanT
-        let anc = (Anchor (rs newSpan) (MovedAnchor (DP 1 2)))
-        let anc2 = (Anchor (rs newSpan) (MovedAnchor (DP 1 4)))
-        let an = ApiAnn anc
-                        (AnnList (Just anc2) Nothing Nothing
-                                 [(undeltaSpan (rs newSpan) AnnWhere (DP 0 0))] [])
-                        noCom
-        let decls = [s,d]
-        let sortKey = captureOrder decls
-        let binds = (HsValBinds an (ValBinds sortKey (listToBag $ [decl'])
-                                    [sig']))
-        return (L lm (Match ma mln pats (GRHSs noExtField rhs binds)))
-      replaceLocalBinds x = return x
-  return (ans,L l p')
-
--- ---------------------------------------------------------------------
-
--- | Check that balanceCommentsList is idempotent
-changeWhereIn3a :: Changer
-changeWhereIn3a _libdir ans (L l p) = do
-  let decls0 = hsmodDecls p
-      (decls,(_,_),w) = runTransform mempty (balanceCommentsList decls0)
-      (_de0:_:de1:_d2:_) = decls
-  debugM $ unlines w
-  debugM $ "changeWhereIn3a:de1:" ++ showAst de1
-  let p2 = p { hsmodDecls = decls}
-  return (ans,L l p2)
-
--- ---------------------------------------------------------------------
-
-changeWhereIn3b :: Changer
-changeWhereIn3b _libdir ans (L l p) = do
-  let decls0 = hsmodDecls p
-      (decls,(_,_),w) = runTransform mempty (balanceCommentsList decls0)
-      (de0:_:de1:d2:_) = decls
-      de0' = setEntryDP' de0 (DP 2 0)
-      de1' = setEntryDP' de1 (DP 2 0)
-      d2' = setEntryDP' d2 (DP 2 0)
-      decls' = d2':de1':de0':(tail decls)
-  debugM $ unlines w
-  debugM $ "changeWhereIn3b:de1':" ++ showAst de1'
-  let p2 = p { hsmodDecls = decls'}
-  return (ans,L l p2)
-
--- ---------------------------------------------------------------------
-
-addLocaLDecl1 :: Changer
-addLocaLDecl1 libdir ans lp = do
-  Right (_, (L ld (ValD _ decl))) <- withDynFlags libdir (\df -> parseDecl df "decl" "nn = 2")
-  let decl' = setEntryDP' (L ld decl) (DP 1 4)
-      doAddLocal = do
-        (de1:d2:d3:_) <- hsDecls lp
-        (de1'',d2') <- balanceComments de1 d2
-        (de1',_) <- modifyValD (getLocA de1'') de1'' $ \_m d -> do
-          return ((wrapDecl decl' : d),Nothing)
-        replaceDecls lp [de1', d2', d3]
-
-  (lp',(_,_),w) <- runTransformT mempty doAddLocal
-  debugM $ "addLocaLDecl1:" ++ intercalate "\n" w
-  return (ans,lp')
-
--- ---------------------------------------------------------------------
-
-addLocaLDecl2 :: Changer
-addLocaLDecl2 libdir ans lp = do
-  Right (_, newDecl) <- withDynFlags libdir (\df -> parseDecl df "decl" "nn = 2")
-  let
-      doAddLocal = do
-         (de1:d2:_) <- hsDecls lp
-         (de1'',d2') <- balanceComments de1 d2
-
-         (parent',_) <- modifyValD (getLocA de1) de1'' $ \_m (d:ds) -> do
-           newDecl' <- transferEntryDP' d newDecl
-           let d' = setEntryDP' d (DP 1 0)
-           return ((newDecl':d':ds),Nothing)
-
-         replaceDecls lp [parent',d2']
-
-  (lp',(_,_),_w) <- runTransformT mempty doAddLocal
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
--- ---------------------------------------------------------------------
-
-addLocaLDecl3 :: Changer
-addLocaLDecl3 libdir ans lp = do
-  Right (_, newDecl) <- withDynFlags libdir (\df -> parseDecl df "decl" "nn = 2")
-  -- Right (_, newDecl@(L ld (ValD _ decl))) <- withDynFlags libdir (\df -> parseDecl df "decl" "jj = 2")
-  let
-      doAddLocal = do
-         (de1:d2:_) <- hsDecls lp
-         (de1'',d2') <- balanceComments de1 d2
-
-         (parent',_) <- modifyValD (getLocA de1) de1'' $ \_m (d:ds) -> do
-           let newDecl' = setEntryDP' newDecl (DP 1 0)
-           return (((d:ds) ++ [newDecl']),Nothing)
-
-         replaceDecls (anchorEof lp) [parent',d2']
-
-  (lp',(_,_),_w) <- runTransformT mempty doAddLocal
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
--- ---------------------------------------------------------------------
-
-addLocaLDecl4 :: Changer
-addLocaLDecl4 libdir ans lp = do
-  Right (_, newDecl) <- withDynFlags libdir (\df -> parseDecl df "decl" "nn = 2")
-  Right (_, newSig)  <- withDynFlags libdir (\df -> parseDecl df "sig"  "nn :: Int")
-  -- putStrLn $ "addLocaLDecl4:lp=" ++ showGhc lp
-  let
-      doAddLocal = do
-         (parent:ds) <- hsDecls lp
-
-         let newDecl' = setEntryDP' newDecl (DP 1 0)
-         let newSig'  = setEntryDP' newSig  (DP 1 4)
-
-         (parent',_) <- modifyValD (getLocA parent) parent $ \_m decls -> do
-           return ((decls++[newSig',newDecl']),Nothing)
-
-         replaceDecls (anchorEof lp) (parent':ds)
-
-  (lp',(_,_),_w) <- runTransformT mempty doAddLocal
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
-
--- ---------------------------------------------------------------------
-
-addLocaLDecl5 :: Changer
-addLocaLDecl5 _libdir ans lp = do
-  let
-      doAddLocal = do
-         decls <- hsDecls lp
-         [s1,de1,d2,d3] <- balanceCommentsList decls
-
-         let d3' = setEntryDP' d3 (DP 2 0)
-
-         (de1',_) <- modifyValD (getLocA de1) de1 $ \_m _decls -> do
-           let d2' = setEntryDP' d2 (DP 1 0)
-           return ([d2'],Nothing)
-         replaceDecls lp [s1,de1',d3']
-
-  (lp',(_,_),_w) <- runTransformT mempty doAddLocal
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
--- ---------------------------------------------------------------------
-
-addLocaLDecl6 :: Changer
-addLocaLDecl6 libdir ans lp = do
-  Right (_, newDecl) <- withDynFlags libdir (\df -> parseDecl df "decl" "x = 3")
-  let
-      newDecl' = setEntryDP' newDecl (DP 1 4)
-      doAddLocal = do
-        decls0 <- hsDecls lp
-        [de1'',d2] <- balanceCommentsList decls0
-
-        let de1 = captureMatchLineSpacing de1''
-        let L _ (ValD _ (FunBind _ _ (MG _ (L _ ms) _) _)) = de1
-        let [ma1,_ma2] = ms
-
-        (de1',_) <- modifyValD (getLocA ma1) de1 $ \_m decls -> do
-           return ((newDecl' : decls),Nothing)
-        replaceDecls lp [de1', d2]
-
-  (lp',(_,_),_w) <- runTransformT mempty doAddLocal
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
--- ---------------------------------------------------------------------
-
-rmDecl1 :: Changer
-rmDecl1 _libdir ans lp = do
-  let doRmDecl = do
-         tlDecs0 <- hsDecls lp
-         tlDecs <- balanceCommentsList $ captureLineSpacing tlDecs0
-         let (de1:_s1:_d2:ds) = tlDecs
-
-         replaceDecls lp (de1:ds)
-
-  (lp',(_,_),_w) <- runTransformT mempty doRmDecl
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
--- ---------------------------------------------------------------------
-
-rmDecl2 :: Changer
-rmDecl2 _libdir ans lp = do
-  let
-      doRmDecl = do
-        let
-          go :: GHC.LHsExpr GhcPs -> Transform (GHC.LHsExpr GhcPs)
-          go e@(GHC.L _ (GHC.HsLet{})) = do
-            decs0 <- hsDecls e
-            decs <- balanceCommentsList $ captureLineSpacing decs0
-            e' <- replaceDecls e (init decs)
-            return e'
-          go x = return x
-
-        everywhereM (mkM go) lp
-
-  let (lp',(_,_),_w) = runTransform mempty doRmDecl
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
--- ---------------------------------------------------------------------
-
-rmDecl3 :: Changer
-rmDecl3 _libdir ans lp = do
-  let
-      doRmDecl = do
-         [de1,d2] <- hsDecls lp
-
-         (de1',Just sd1) <- modifyValD (getLocA de1) de1 $ \_m [sd1] -> do
-           let sd1' = setEntryDP' sd1 (DP 2 0)
-           return ([],Just sd1')
-
-         replaceDecls lp [de1',sd1,d2]
-
-  (lp',(_,_),_w) <- runTransformT mempty doRmDecl
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
--- ---------------------------------------------------------------------
-
-rmDecl4 :: Changer
-rmDecl4 _libdir ans lp = do
-  let
-      doRmDecl = do
-         [de1] <- hsDecls lp
-
-         (de1',Just sd1) <- modifyValD (getLocA de1) de1 $ \_m [sd1,sd2] -> do
-           sd2' <- transferEntryDP' sd1 sd2
-
-           let sd1' = setEntryDP' sd1 (DP 2 0)
-           return ([sd2'],Just sd1')
-
-         replaceDecls (anchorEof lp) [de1',sd1]
-
-  (lp',(_,_),_w) <- runTransformT mempty doRmDecl
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
--- ---------------------------------------------------------------------
-
-rmDecl5 :: Changer
-rmDecl5 _libdir ans lp = do
-  let
-      doRmDecl = do
-        let
-          go :: HsExpr GhcPs -> Transform (HsExpr GhcPs)
-          go (HsLet a lb expr) = do
-            decs <- hsDeclsValBinds lb
-            let dec = last decs
-            _ <- transferEntryDPT (head decs) dec
-            lb' <- replaceDeclsValbinds WithoutWhere lb [dec]
-            return (HsLet a lb' expr)
-          go x = return x
-
-        everywhereM (mkM go) lp
-
-  let (lp',(_,_),_w) = runTransform mempty doRmDecl
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
--- ---------------------------------------------------------------------
-
-rmDecl6 :: Changer
-rmDecl6 _libdir ans lp = do
-  let
-      doRmDecl = do
-         [de1] <- hsDecls lp
-
-         (de1',_) <- modifyValD (getLocA de1) de1 $ \_m subDecs -> do
-           let (ss1:_sd1:sd2:sds) = subDecs
-           sd2' <- transferEntryDP' ss1 sd2
-
-           return (sd2':sds,Nothing)
-
-         replaceDecls lp [de1']
-
-  (lp',(_,_),_w) <- runTransformT mempty doRmDecl
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
--- ---------------------------------------------------------------------
-
-rmDecl7 :: Changer
-rmDecl7 _libdir ans lp = do
-  let
-      doRmDecl = do
-         tlDecs <- hsDecls lp
-         [s1,de1,d2,d3] <- balanceCommentsList tlDecs
-
-         d3' <- transferEntryDP' d2 d3
-
-         replaceDecls lp [s1,de1,d3']
-
-  (lp',(_,_),_w) <- runTransformT mempty doRmDecl
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
--- ---------------------------------------------------------------------
-
-rmTypeSig1 :: Changer
-rmTypeSig1 _libdir ans lp = do
-  let doRmDecl = do
-         tlDecs <- hsDecls lp
-         let (s0:de1:d2) = tlDecs
-             s1 = captureTypeSigSpacing s0
-             (L l (SigD x1 (TypeSig x2 [n1,n2] typ))) = s1
-         n2' <- transferEntryDP n1 n2
-         let s1' = (L l (SigD x1 (TypeSig x2 [n2'] typ)))
-         replaceDecls lp (s1':de1:d2)
-
-  let (lp',(_,_),_w) = runTransform mempty doRmDecl
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
--- ---------------------------------------------------------------------
-
-rmTypeSig2 :: Changer
-rmTypeSig2 _libdir ans lp = do
-  let doRmDecl = do
-         tlDecs <- hsDecls lp
-         let [de1] = tlDecs
-
-         (de1',_) <- modifyValD (getLocA de1) de1 $ \_m [s,d] -> do
-           d' <- transferEntryDPT s d
-           return ([d'],Nothing)
-         replaceDecls lp [de1']
-
-  let (lp',(_,_),_w) = runTransform mempty doRmDecl
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
--- ---------------------------------------------------------------------
-
-addHiding1 :: Changer
-addHiding1 _libdir ans (L l p) = do
-  let doTransform = do
-        l0 <- uniqueSrcSpanT
-        l1 <- uniqueSrcSpanT
-        l2 <- uniqueSrcSpanT
-        let
-          [L li imp1,imp2] = hsmodImports p
-          n1 = L (noAnnSrcSpanDP0 l1) (mkVarUnqual (mkFastString "n1"))
-          n2 = L (noAnnSrcSpanDP0 l2) (mkVarUnqual (mkFastString "n2"))
-          v1 = L (addComma $ noAnnSrcSpanDP0 l1) (IEVar noExtField (L (noAnnSrcSpanDP0 l1) (IEName n1)))
-          v2 = L (           noAnnSrcSpanDP0 l2) (IEVar noExtField (L (noAnnSrcSpanDP0 l2) (IEName n2)))
-          impHiding = L (SrcSpanAnn (ApiAnn (Anchor (realSrcSpan l0) m0)
-                                     (AnnList Nothing
-                                              (Just (AddApiAnn AnnOpenP  d1))
-                                              (Just (AddApiAnn AnnCloseP d0))
-                                              [(AddApiAnn AnnHiding d1)]
-                                              [])
-                                       noCom) l0) [v1,v2]
-          imp1' = imp1 { ideclHiding = Just (True,impHiding)}
-          p' = p { hsmodImports = [L li imp1',imp2]}
-        return (L l p')
-
-  let (lp',(_ans',_),_w) = runTransform mempty doTransform
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
--- ---------------------------------------------------------------------
-
-addHiding2 :: Changer
-addHiding2 _libdir ans (L l p) = do
-  let doTransform = do
-        l1 <- uniqueSrcSpanT
-        l2 <- uniqueSrcSpanT
-        let
-          [L li imp1] = hsmodImports p
-          Just (_,L lh ns) = ideclHiding imp1
-          lh' = (SrcSpanAnn (ApiAnn (Anchor (realSrcSpan (locA lh)) m0)
-                                     (AnnList Nothing
-                                              (Just (AddApiAnn AnnOpenP  d1))
-                                              (Just (AddApiAnn AnnCloseP d0))
-                                              [(AddApiAnn AnnHiding d1)]
-                                              [])
-                                       noCom) (locA lh))
-          n1 = L (noAnnSrcSpanDP0 l1) (mkVarUnqual (mkFastString "n1"))
-          n2 = L (noAnnSrcSpanDP0 l2) (mkVarUnqual (mkFastString "n2"))
-          v1 = L (addComma $ noAnnSrcSpanDP0 l1) (IEVar noExtField (L (noAnnSrcSpanDP0 l1) (IEName n1)))
-          v2 = L (           noAnnSrcSpanDP0 l2) (IEVar noExtField (L (noAnnSrcSpanDP0 l2) (IEName n2)))
-          L ln n = last ns
-          n' = L (addComma ln) n
-          imp1' = imp1 { ideclHiding = Just (True,L lh' (init ns ++ [n',v1,v2]))}
-          p' = p { hsmodImports = [L li imp1']}
-        return (L l p')
-
-  let (lp',(_ans',_),_w) = runTransform mempty doTransform
-  debugM $ "log:[\n" ++ intercalate "\n" _w ++ "]log end\n"
-  return (ans,lp')
-
-
--- ---------------------------------------------------------------------
--- From SYB
-
--- | Apply transformation on each level of a tree.
---
--- Just like 'everything', this is stolen from SYB package.
-everywhere :: (forall a. Data a => a -> a) -> (forall a. Data a => a -> a)
-everywhere f = f . gmapT (everywhere f)
-
--- | Create generic transformation.
---
--- Another function stolen from SYB package.
-mkT :: (Typeable a, Typeable b) => (b -> b) -> (a -> a)
-mkT f = case cast f of
-    Just f' -> f'
-    Nothing -> id
-
--- ---------------------------------------------------------------------
diff --git a/utils/check-exact/cases/AddDecl1.expected.hs b/utils/check-exact/cases/AddDecl1.expected.hs
deleted file mode 100644
index 88ef0fdd7d..0000000000
--- a/utils/check-exact/cases/AddDecl1.expected.hs
+++ /dev/null
@@ -1,13 +0,0 @@
-module AddDecl where
-
-nn = n2
-
--- Adding a declaration to an existing file
-
--- | Do foo
-foo a b = a + b
-
--- | Do bar
-bar x y = {- baz -} foo (x+y) x
-
--- end of file
diff --git a/utils/check-exact/cases/AddDecl1.hs b/utils/check-exact/cases/AddDecl1.hs
deleted file mode 100644
index 45c0cb3864..0000000000
--- a/utils/check-exact/cases/AddDecl1.hs
+++ /dev/null
@@ -1,11 +0,0 @@
-module AddDecl where
-
--- Adding a declaration to an existing file
-
--- | Do foo
-foo a b = a + b
-
--- | Do bar
-bar x y = {- baz -} foo (x+y) x
-
--- end of file
diff --git a/utils/check-exact/cases/AddDecl2.expected.hs b/utils/check-exact/cases/AddDecl2.expected.hs
deleted file mode 100644
index 2bbbcf5b37..0000000000
--- a/utils/check-exact/cases/AddDecl2.expected.hs
+++ /dev/null
@@ -1,13 +0,0 @@
-module AddDecl where
-
--- Adding a declaration to an existing file
-
--- | Do foo
-foo a b = a + b
-
--- | Do bar
-bar x y = {- baz -} foo (x+y) x
-
-nn = n2
-
--- end of file
diff --git a/utils/check-exact/cases/AddDecl2.hs b/utils/check-exact/cases/AddDecl2.hs
deleted file mode 100644
index 45c0cb3864..0000000000
--- a/utils/check-exact/cases/AddDecl2.hs
+++ /dev/null
@@ -1,11 +0,0 @@
-module AddDecl where
-
--- Adding a declaration to an existing file
-
--- | Do foo
-foo a b = a + b
-
--- | Do bar
-bar x y = {- baz -} foo (x+y) x
-
--- end of file
diff --git a/utils/check-exact/cases/AddDecl3.expected.hs b/utils/check-exact/cases/AddDecl3.expected.hs
deleted file mode 100644
index dd3044fcc5..0000000000
--- a/utils/check-exact/cases/AddDecl3.expected.hs
+++ /dev/null
@@ -1,13 +0,0 @@
-module AddDecl where
-
--- Adding a declaration to an existing file
-
--- | Do foo
-foo a b = a + b
-
-nn = n2
-
--- | Do bar
-bar x y = {- baz -} foo (x+y) x
-
--- end of file
diff --git a/utils/check-exact/cases/AddDecl3.hs b/utils/check-exact/cases/AddDecl3.hs
deleted file mode 100644
index 45c0cb3864..0000000000
--- a/utils/check-exact/cases/AddDecl3.hs
+++ /dev/null
@@ -1,11 +0,0 @@
-module AddDecl where
-
--- Adding a declaration to an existing file
-
--- | Do foo
-foo a b = a + b
-
--- | Do bar
-bar x y = {- baz -} foo (x+y) x
-
--- end of file
diff --git a/utils/check-exact/cases/AddHiding1.expected.hs b/utils/check-exact/cases/AddHiding1.expected.hs
deleted file mode 100644
index f3c8f17c8b..0000000000
--- a/utils/check-exact/cases/AddHiding1.expected.hs
+++ /dev/null
@@ -1,8 +0,0 @@
-module AddHiding1 where
-
-import Data.Maybe hiding (n1,n2)
-
-import Data.Maybe hiding (n1,n2)
-
-f = 1
-
diff --git a/utils/check-exact/cases/AddHiding1.hs b/utils/check-exact/cases/AddHiding1.hs
deleted file mode 100644
index abcd47879a..0000000000
--- a/utils/check-exact/cases/AddHiding1.hs
+++ /dev/null
@@ -1,8 +0,0 @@
-module AddHiding1 where
-
-import Data.Maybe
-
-import Data.Maybe hiding (n1,n2)
-
-f = 1
-
diff --git a/utils/check-exact/cases/AddHiding2.expected.hs b/utils/check-exact/cases/AddHiding2.expected.hs
deleted file mode 100644
index d62005227b..0000000000
--- a/utils/check-exact/cases/AddHiding2.expected.hs
+++ /dev/null
@@ -1,5 +0,0 @@
-module AddHiding2 where
-
-import Data.Maybe hiding (f1,f2,n1,n2)
-
-f = 1
diff --git a/utils/check-exact/cases/AddHiding2.hs b/utils/check-exact/cases/AddHiding2.hs
deleted file mode 100644
index f5f551a9cb..0000000000
--- a/utils/check-exact/cases/AddHiding2.hs
+++ /dev/null
@@ -1,5 +0,0 @@
-module AddHiding2 where
-
-import Data.Maybe hiding (f1,f2)
-
-f = 1
diff --git a/utils/check-exact/cases/AddLocalDecl1.expected.hs b/utils/check-exact/cases/AddLocalDecl1.expected.hs
deleted file mode 100644
index 023e2ea05d..0000000000
--- a/utils/check-exact/cases/AddLocalDecl1.expected.hs
+++ /dev/null
@@ -1,15 +0,0 @@
-module AddLocalDecl1 where
-
--- |This is a function
-foo = x -- comment1
-  where
-    nn = 2
--- trailing 1
-
--- |Another fun
-x = a -- comment2
-  where
-    a = 3
--- trailing 2
-
-y = 3
diff --git a/utils/check-exact/cases/AddLocalDecl1.hs b/utils/check-exact/cases/AddLocalDecl1.hs
deleted file mode 100644
index 3bb4953c51..0000000000
--- a/utils/check-exact/cases/AddLocalDecl1.hs
+++ /dev/null
@@ -1,13 +0,0 @@
-module AddLocalDecl1 where
-
--- |This is a function
-foo = x -- comment1
--- trailing 1
-
--- |Another fun
-x = a -- comment2
-  where
-    a = 3
--- trailing 2
-
-y = 3
diff --git a/utils/check-exact/cases/AddLocalDecl2.expected.hs b/utils/check-exact/cases/AddLocalDecl2.expected.hs
deleted file mode 100644
index ff25b79157..0000000000
--- a/utils/check-exact/cases/AddLocalDecl2.expected.hs
+++ /dev/null
@@ -1,11 +0,0 @@
-module AddLocalDecl2 where
-
--- |This is a function
-foo = x -- comment 0
-  where nn = 2
-        p = 2 -- comment 1
-
--- |Another fun
-bar = a -- comment 2
-  where nn = 2
-        p = 2 -- comment 3
diff --git a/utils/check-exact/cases/AddLocalDecl2.hs b/utils/check-exact/cases/AddLocalDecl2.hs
deleted file mode 100644
index 7609f657ed..0000000000
--- a/utils/check-exact/cases/AddLocalDecl2.hs
+++ /dev/null
@@ -1,10 +0,0 @@
-module AddLocalDecl2 where
-
--- |This is a function
-foo = x -- comment 0
-  where p = 2 -- comment 1
-
--- |Another fun
-bar = a -- comment 2
-  where nn = 2
-        p = 2 -- comment 3
diff --git a/utils/check-exact/cases/AddLocalDecl3.expected.hs b/utils/check-exact/cases/AddLocalDecl3.expected.hs
deleted file mode 100644
index deaf1e7cb8..0000000000
--- a/utils/check-exact/cases/AddLocalDecl3.expected.hs
+++ /dev/null
@@ -1,13 +0,0 @@
-module AddLocalDecl3 where
-
--- |This is a function
-foo = x -- comment 0
-  where p = 2 -- comment 1
-        nn = 2
- -- comment f
-
--- |Another fun
-bar = a -- comment 2
-  where p = 2 -- comment 3
-        nn = 2
- -- comment b
diff --git a/utils/check-exact/cases/AddLocalDecl3.hs b/utils/check-exact/cases/AddLocalDecl3.hs
deleted file mode 100644
index eb14013031..0000000000
--- a/utils/check-exact/cases/AddLocalDecl3.hs
+++ /dev/null
@@ -1,12 +0,0 @@
-module AddLocalDecl3 where
-
--- |This is a function
-foo = x -- comment 0
-  where p = 2 -- comment 1
- -- comment f
-
--- |Another fun
-bar = a -- comment 2
-  where p = 2 -- comment 3
-        nn = 2
- -- comment b
diff --git a/utils/check-exact/cases/AddLocalDecl4.expected.hs b/utils/check-exact/cases/AddLocalDecl4.expected.hs
deleted file mode 100644
index b3c1445d0d..0000000000
--- a/utils/check-exact/cases/AddLocalDecl4.expected.hs
+++ /dev/null
@@ -1,6 +0,0 @@
-module AddLocalDecl4 where
-
-toplevel x = c * x
-  where
-    nn :: Int
-    nn = 2
diff --git a/utils/check-exact/cases/AddLocalDecl4.hs b/utils/check-exact/cases/AddLocalDecl4.hs
deleted file mode 100644
index 2ec2c0bf73..0000000000
--- a/utils/check-exact/cases/AddLocalDecl4.hs
+++ /dev/null
@@ -1,3 +0,0 @@
-module AddLocalDecl4 where
-
-toplevel x = c * x
diff --git a/utils/check-exact/cases/AddLocalDecl5.expected.hs b/utils/check-exact/cases/AddLocalDecl5.expected.hs
deleted file mode 100644
index 5e66dc5a6b..0000000000
--- a/utils/check-exact/cases/AddLocalDecl5.expected.hs
+++ /dev/null
@@ -1,9 +0,0 @@
-module AddLocalDecl5 where
-
-toplevel :: Integer -> Integer
-toplevel x = c * x
-  where
-    -- c,d :: Integer
-    c = 7
-
-d = 9
diff --git a/utils/check-exact/cases/AddLocalDecl5.hs b/utils/check-exact/cases/AddLocalDecl5.hs
deleted file mode 100644
index 9f07e1071b..0000000000
--- a/utils/check-exact/cases/AddLocalDecl5.hs
+++ /dev/null
@@ -1,8 +0,0 @@
-module AddLocalDecl5 where
-
-toplevel :: Integer -> Integer
-toplevel x = c * x
-
--- c,d :: Integer
-c = 7
-d = 9
diff --git a/utils/check-exact/cases/AddLocalDecl6.expected.hs b/utils/check-exact/cases/AddLocalDecl6.expected.hs
deleted file mode 100644
index 9cedb7d63f..0000000000
--- a/utils/check-exact/cases/AddLocalDecl6.expected.hs
+++ /dev/null
@@ -1,12 +0,0 @@
-module AddLocalDecl6 where
-
-foo [] = 1 -- comment 0
-  where
-    x = 3
-foo xs = 2 -- comment 1
-
-bar [] = 1 -- comment 2
-  where
-    x = 3
-bar xs = 2 -- comment 3
-
diff --git a/utils/check-exact/cases/AddLocalDecl6.hs b/utils/check-exact/cases/AddLocalDecl6.hs
deleted file mode 100644
index d0bdffca41..0000000000
--- a/utils/check-exact/cases/AddLocalDecl6.hs
+++ /dev/null
@@ -1,10 +0,0 @@
-module AddLocalDecl6 where
-
-foo [] = 1 -- comment 0
-foo xs = 2 -- comment 1
-
-bar [] = 1 -- comment 2
-  where
-    x = 3
-bar xs = 2 -- comment 3
-
diff --git a/utils/check-exact/cases/EmptyWheres.hs b/utils/check-exact/cases/EmptyWheres.hs
deleted file mode 100644
index edc0570012..0000000000
--- a/utils/check-exact/cases/EmptyWheres.hs
+++ /dev/null
@@ -1,9 +0,0 @@
-module EmptyWheres where
-
-x = 2 where
-y = 3
-
-instance Foo1 Int where
-
-ff = ff where g = g where
-type T = Int
diff --git a/utils/check-exact/cases/LayoutIn1.expected.hs b/utils/check-exact/cases/LayoutIn1.expected.hs
deleted file mode 100644
index 2b23b21853..0000000000
--- a/utils/check-exact/cases/LayoutIn1.expected.hs
+++ /dev/null
@@ -1,9 +0,0 @@
-module LayoutIn1 where
-
---Layout rule applies after 'where','let','do' and 'of'
-
---In this Example: rename 'sq' to 'square'.
-
-sumSquares x y= square x + square y where sq x= x^pow
-          --There is a comment.
-                                          pow=2
diff --git a/utils/check-exact/cases/LayoutIn1.hs b/utils/check-exact/cases/LayoutIn1.hs
deleted file mode 100644
index 3ea1f8402c..0000000000
--- a/utils/check-exact/cases/LayoutIn1.hs
+++ /dev/null
@@ -1,9 +0,0 @@
-module LayoutIn1 where
-
---Layout rule applies after 'where','let','do' and 'of'
-
---In this Example: rename 'sq' to 'square'.
-
-sumSquares x y= sq x + sq y where sq x= x^pow
-  --There is a comment.
-                                  pow=2
diff --git a/utils/check-exact/cases/LayoutIn3.expected.hs b/utils/check-exact/cases/LayoutIn3.expected.hs
deleted file mode 100644
index 900d6daf63..0000000000
--- a/utils/check-exact/cases/LayoutIn3.expected.hs
+++ /dev/null
@@ -1,13 +0,0 @@
-module LayoutIn3 where
-
---Layout rule applies after 'where','let','do' and 'of'
-
---In this Example: rename 'x' after 'let'  to 'anotherX'.
-
-foo x = let anotherX = 12 in (let y = 3
-                                  z = 2 in anotherX * y * z * w) where   y = 2
-                                                                         --there is a comment.
-                                                                         w = x
-                                                                           where
-                                                                             x = let y = 5 in y + 3
-
diff --git a/utils/check-exact/cases/LayoutIn3.hs b/utils/check-exact/cases/LayoutIn3.hs
deleted file mode 100644
index c8c110d65c..0000000000
--- a/utils/check-exact/cases/LayoutIn3.hs
+++ /dev/null
@@ -1,13 +0,0 @@
-module LayoutIn3 where
-
---Layout rule applies after 'where','let','do' and 'of'
-
---In this Example: rename 'x' after 'let'  to 'anotherX'.
-
-foo x = let x = 12 in (let y = 3
-                           z = 2 in x * y * z * w) where   y = 2
-                                                           --there is a comment.
-                                                           w = x
-                                                             where
-                                                               x = let y = 5 in y + 3
-
diff --git a/utils/check-exact/cases/LayoutIn3a.expected.hs b/utils/check-exact/cases/LayoutIn3a.expected.hs
deleted file mode 100644
index c0a552c0d0..0000000000
--- a/utils/check-exact/cases/LayoutIn3a.expected.hs
+++ /dev/null
@@ -1,13 +0,0 @@
-module LayoutIn3a where
-
---Layout rule applies after 'where','let','do' and 'of'
-
---In this Example: rename 'x' after 'let'  to 'anotherX'.
-
-foo x = let anotherX = 12 in (
-                                    anotherX            ) where   y = 2
-                                                                  --there is a comment.
-                                                                  w = x
-                                                                    where
-                                                                      x = let y = 5 in y + 3
-
diff --git a/utils/check-exact/cases/LayoutIn3a.hs b/utils/check-exact/cases/LayoutIn3a.hs
deleted file mode 100644
index 58b36b07f8..0000000000
--- a/utils/check-exact/cases/LayoutIn3a.hs
+++ /dev/null
@@ -1,13 +0,0 @@
-module LayoutIn3a where
-
---Layout rule applies after 'where','let','do' and 'of'
-
---In this Example: rename 'x' after 'let'  to 'anotherX'.
-
-foo x = let x = 12 in (
-                                    x            ) where   y = 2
-                                                           --there is a comment.
-                                                           w = x
-                                                             where
-                                                               x = let y = 5 in y + 3
-
diff --git a/utils/check-exact/cases/LayoutIn3b.expected.hs b/utils/check-exact/cases/LayoutIn3b.expected.hs
deleted file mode 100644
index 057d9d346a..0000000000
--- a/utils/check-exact/cases/LayoutIn3b.expected.hs
+++ /dev/null
@@ -1,12 +0,0 @@
-module LayoutIn3b where
-
---Layout rule applies after 'where','let','do' and 'of'
-
---In this Example: rename 'x' after 'let'  to 'anotherX'.
-
-foo x = let anotherX = 12 in (             anotherX            ) where   y = 2
-                                                                         --there is a comment.
-                                                                         w = x
-                                                                           where
-                                                                             x = let y = 5 in y + 3
-
diff --git a/utils/check-exact/cases/LayoutIn3b.hs b/utils/check-exact/cases/LayoutIn3b.hs
deleted file mode 100644
index 32bc294ae4..0000000000
--- a/utils/check-exact/cases/LayoutIn3b.hs
+++ /dev/null
@@ -1,12 +0,0 @@
-module LayoutIn3b where
-
---Layout rule applies after 'where','let','do' and 'of'
-
---In this Example: rename 'x' after 'let'  to 'anotherX'.
-
-foo x = let x = 12 in (             x            ) where   y = 2
-                                                           --there is a comment.
-                                                           w = x
-                                                             where
-                                                               x = let y = 5 in y + 3
-
diff --git a/utils/check-exact/cases/LayoutIn4.expected.hs b/utils/check-exact/cases/LayoutIn4.expected.hs
deleted file mode 100644
index 531478da48..0000000000
--- a/utils/check-exact/cases/LayoutIn4.expected.hs
+++ /dev/null
@@ -1,13 +0,0 @@
-module LayoutIn4 where
-
---Layout rule applies after 'where','let','do' and 'of'
-
---In this Example: rename 'ioFun' to  'io'
-
-main = io "hello" where io s= do  let  k = reverse s
---There is a comment
-                                  s <- getLine
-                                  let  q = (k ++ s)
-                                  putStr q
-                                  putStr "foo"
-
diff --git a/utils/check-exact/cases/LayoutIn4.hs b/utils/check-exact/cases/LayoutIn4.hs
deleted file mode 100644
index d99d05649d..0000000000
--- a/utils/check-exact/cases/LayoutIn4.hs
+++ /dev/null
@@ -1,13 +0,0 @@
-module LayoutIn4 where
-
---Layout rule applies after 'where','let','do' and 'of'
-
---In this Example: rename 'ioFun' to  'io'
-
-main = ioFun "hello" where ioFun s= do  let  k = reverse s
- --There is a comment
-                                        s <- getLine
-                                        let  q = (k ++ s)
-                                        putStr q
-                                        putStr "foo"
-
diff --git a/utils/check-exact/cases/LayoutLet2.expected.hs b/utils/check-exact/cases/LayoutLet2.expected.hs
deleted file mode 100644
index 8da499ce3a..0000000000
--- a/utils/check-exact/cases/LayoutLet2.expected.hs
+++ /dev/null
@@ -1,8 +0,0 @@
-module LayoutLet2 where
-
--- Simple let expression, rename xxx to something longer or shorter
--- and the let/in layout should adjust accordingly
--- In this case the tokens for xxx + a + b should also shift out
-
-foo xxxlonger = let a = 1
-                    b = 2 in xxxlonger + a + b
diff --git a/utils/check-exact/cases/LayoutLet2.hs b/utils/check-exact/cases/LayoutLet2.hs
deleted file mode 100644
index 378aa587a8..0000000000
--- a/utils/check-exact/cases/LayoutLet2.hs
+++ /dev/null
@@ -1,8 +0,0 @@
-module LayoutLet2 where
-
--- Simple let expression, rename xxx to something longer or shorter
--- and the let/in layout should adjust accordingly
--- In this case the tokens for xxx + a + b should also shift out
-
-foo xxx = let a = 1
-              b = 2 in xxx + a + b
diff --git a/utils/check-exact/cases/LayoutLet3.expected.hs b/utils/check-exact/cases/LayoutLet3.expected.hs
deleted file mode 100644
index 797cf5f483..0000000000
--- a/utils/check-exact/cases/LayoutLet3.expected.hs
+++ /dev/null
@@ -1,10 +0,0 @@
-module LayoutLet3 where
-
--- Simple let expression, rename xxx to something longer or shorter
--- and the let/in layout should adjust accordingly
--- In this case the tokens for xxx + a + b should also shift out
-
-foo xxxlonger = let a = 1
-                    b = 2
-                in xxxlonger + a + b
-
diff --git a/utils/check-exact/cases/LayoutLet3.hs b/utils/check-exact/cases/LayoutLet3.hs
deleted file mode 100644
index 5ba80aff6a..0000000000
--- a/utils/check-exact/cases/LayoutLet3.hs
+++ /dev/null
@@ -1,10 +0,0 @@
-module LayoutLet3 where
-
--- Simple let expression, rename xxx to something longer or shorter
--- and the let/in layout should adjust accordingly
--- In this case the tokens for xxx + a + b should also shift out
-
-foo xxx = let a = 1
-              b = 2
-          in xxx + a + b
-
diff --git a/utils/check-exact/cases/LayoutLet4.expected.hs b/utils/check-exact/cases/LayoutLet4.expected.hs
deleted file mode 100644
index b3c52f424e..0000000000
--- a/utils/check-exact/cases/LayoutLet4.expected.hs
+++ /dev/null
@@ -1,12 +0,0 @@
-module LayoutLet4 where
-
--- Simple let expression, rename xxx to something longer or shorter
--- and the let/in layout should adjust accordingly
--- In this case the tokens for xxx + a + b should also shift out
-
-foo xxxlonger = let a = 1
-                    b = 2
-                in xxxlonger + a + b
-
-bar = 3
-
diff --git a/utils/check-exact/cases/LayoutLet4.hs b/utils/check-exact/cases/LayoutLet4.hs
deleted file mode 100644
index 28fe599432..0000000000
--- a/utils/check-exact/cases/LayoutLet4.hs
+++ /dev/null
@@ -1,12 +0,0 @@
-module LayoutLet4 where
-
--- Simple let expression, rename xxx to something longer or shorter
--- and the let/in layout should adjust accordingly
--- In this case the tokens for xxx + a + b should also shift out
-
-foo xxx = let a = 1
-              b = 2
-          in xxx + a + b
-
-bar = 3
-
diff --git a/utils/check-exact/cases/LetIn1.expected.hs b/utils/check-exact/cases/LetIn1.expected.hs
deleted file mode 100644
index d233115ee6..0000000000
--- a/utils/check-exact/cases/LetIn1.expected.hs
+++ /dev/null
@@ -1,18 +0,0 @@
-module LetIn1 where
-
---A definition can be demoted to the local 'where' binding of a friend declaration,
---if it is only used by this friend declaration.
-
---Demoting a definition narrows down the scope of the definition.
---In this example, demote the local  'pow' to 'sq'
---This example also aims to test the demoting a local declaration in 'let'.
-
-sumSquares x y = let sq 0=0
-                     sq z=z^pow
-                 in sq x + sq y
-
-
-anotherFun 0 y = sq y
-     where  sq x = x^2
-
-
diff --git a/utils/check-exact/cases/LetIn1.hs b/utils/check-exact/cases/LetIn1.hs
deleted file mode 100644
index f1109b8f03..0000000000
--- a/utils/check-exact/cases/LetIn1.hs
+++ /dev/null
@@ -1,19 +0,0 @@
-module LetIn1 where
-
---A definition can be demoted to the local 'where' binding of a friend declaration,
---if it is only used by this friend declaration.
-
---Demoting a definition narrows down the scope of the definition.
---In this example, demote the local  'pow' to 'sq'
---This example also aims to test the demoting a local declaration in 'let'.
-
-sumSquares x y = let sq 0=0
-                     sq z=z^pow
-                     pow=2
-                 in sq x + sq y
-
-
-anotherFun 0 y = sq y
-     where  sq x = x^2
-
-
diff --git a/utils/check-exact/cases/LocToName.expected.hs b/utils/check-exact/cases/LocToName.expected.hs
deleted file mode 100644
index 0b1484873a..0000000000
--- a/utils/check-exact/cases/LocToName.expected.hs
+++ /dev/null
@@ -1,25 +0,0 @@
-module LocToName where
-
-{-
-
-
-
-
-
-
-
-
--}
-
-
-
-
-
-
-
-LocToName.newPoint (x:xs) = x ^2 + LocToName.newPoint xs
-    -- where sq x = x ^pow
-    --       pow = 2
-
-LocToName.newPoint [] = 0
-
diff --git a/utils/check-exact/cases/LocToName.hs b/utils/check-exact/cases/LocToName.hs
deleted file mode 100644
index 89a0acea12..0000000000
--- a/utils/check-exact/cases/LocToName.hs
+++ /dev/null
@@ -1,25 +0,0 @@
-module LocToName where
-
-{-
-
-
-
-
-
-
-
-
--}
-
-
-
-
-
-
-
-sumSquares (x:xs) = x ^2 + sumSquares xs
-    -- where sq x = x ^pow
-    --       pow = 2
-
-sumSquares [] = 0
-
diff --git a/utils/check-exact/cases/LocalDecls.expected.hs b/utils/check-exact/cases/LocalDecls.expected.hs
deleted file mode 100644
index 7c41178ba0..0000000000
--- a/utils/check-exact/cases/LocalDecls.expected.hs
+++ /dev/null
@@ -1,11 +0,0 @@
-module LocalDecls where
-
-foo a = bar a
-  where
-    nn :: Int
-    nn = 2
-
-    bar :: Int -> Int
-    bar x = x + 2
-
-    baz = 4
diff --git a/utils/check-exact/cases/LocalDecls.hs b/utils/check-exact/cases/LocalDecls.hs
deleted file mode 100644
index ebb774ac63..0000000000
--- a/utils/check-exact/cases/LocalDecls.hs
+++ /dev/null
@@ -1,8 +0,0 @@
-module LocalDecls where
-
-foo a = bar a
-  where
-    bar :: Int -> Int
-    bar x = x + 2
-
-    baz = 4
diff --git a/utils/check-exact/cases/LocalDecls2.expected.hs b/utils/check-exact/cases/LocalDecls2.expected.hs
deleted file mode 100644
index d2353e94c5..0000000000
--- a/utils/check-exact/cases/LocalDecls2.expected.hs
+++ /dev/null
@@ -1,8 +0,0 @@
-module LocalDecls2 where
-
-foo a = bar a
-  where
-    nn :: Int
-    nn = 2
-
-
diff --git a/utils/check-exact/cases/LocalDecls2.hs b/utils/check-exact/cases/LocalDecls2.hs
deleted file mode 100644
index 92a8649649..0000000000
--- a/utils/check-exact/cases/LocalDecls2.hs
+++ /dev/null
@@ -1,3 +0,0 @@
-module LocalDecls2 where
-
-foo a = bar a
diff --git a/utils/check-exact/cases/Rename1.expected.hs b/utils/check-exact/cases/Rename1.expected.hs
deleted file mode 100644
index 353a7420e2..0000000000
--- a/utils/check-exact/cases/Rename1.expected.hs
+++ /dev/null
@@ -1,6 +0,0 @@
-module Rename1 where
-
-bar2 x y =
-   do c <- getChar
-      return c
-
diff --git a/utils/check-exact/cases/Rename1.hs b/utils/check-exact/cases/Rename1.hs
deleted file mode 100644
index 1ad343afd3..0000000000
--- a/utils/check-exact/cases/Rename1.hs
+++ /dev/null
@@ -1,6 +0,0 @@
-module Rename1 where
-
-foo x y =
-   do c <- getChar
-      return c
-
diff --git a/utils/check-exact/cases/Rename2.expected.hs b/utils/check-exact/cases/Rename2.expected.hs
deleted file mode 100644
index 6be3ff6e0a..0000000000
--- a/utils/check-exact/cases/Rename2.expected.hs
+++ /dev/null
@@ -1,4 +0,0 @@
-
-joe x = case (odd x) of
-  True -> "Odd"
-  False -> "Even"
diff --git a/utils/check-exact/cases/Rename2.hs b/utils/check-exact/cases/Rename2.hs
deleted file mode 100644
index 29fea060c2..0000000000
--- a/utils/check-exact/cases/Rename2.hs
+++ /dev/null
@@ -1,4 +0,0 @@
-
-foo' x = case (odd x) of
-  True -> "Odd"
-  False -> "Even"
diff --git a/utils/check-exact/cases/RenameCase1.expected.hs b/utils/check-exact/cases/RenameCase1.expected.hs
deleted file mode 100644
index dad6765012..0000000000
--- a/utils/check-exact/cases/RenameCase1.expected.hs
+++ /dev/null
@@ -1,5 +0,0 @@
-module RenameCase1 where
-
-foo x = case (bazLonger x) of
-    1 -> "a"
-    _ -> "b"
diff --git a/utils/check-exact/cases/RenameCase1.hs b/utils/check-exact/cases/RenameCase1.hs
deleted file mode 100644
index 22d549367a..0000000000
--- a/utils/check-exact/cases/RenameCase1.hs
+++ /dev/null
@@ -1,5 +0,0 @@
-module RenameCase1 where
-
-foo x = case (baz x) of
-    1 -> "a"
-    _ -> "b"
diff --git a/utils/check-exact/cases/RmDecl1.expected.hs b/utils/check-exact/cases/RmDecl1.expected.hs
deleted file mode 100644
index 6bb503aede..0000000000
--- a/utils/check-exact/cases/RmDecl1.expected.hs
+++ /dev/null
@@ -1,9 +0,0 @@
-module RmDecl1 where
-
-sumSquares x = x * p
-         where p=2  {-There is a comment-}
-
-{- foo bar -}
-anotherFun 0 y = sq y
-     where  sq x = x^2
-
diff --git a/utils/check-exact/cases/RmDecl1.hs b/utils/check-exact/cases/RmDecl1.hs
deleted file mode 100644
index 15cd9f1e04..0000000000
--- a/utils/check-exact/cases/RmDecl1.hs
+++ /dev/null
@@ -1,13 +0,0 @@
-module RmDecl1 where
-
-sumSquares x = x * p
-         where p=2  {-There is a comment-}
-
-sq :: Int -> Int -> Int
-sq pow 0 = 0
-sq pow z = z^pow  --there is a comment
-
-{- foo bar -}
-anotherFun 0 y = sq y
-     where  sq x = x^2
-
diff --git a/utils/check-exact/cases/RmDecl2.expected.hs b/utils/check-exact/cases/RmDecl2.expected.hs
deleted file mode 100644
index d77b760dca..0000000000
--- a/utils/check-exact/cases/RmDecl2.expected.hs
+++ /dev/null
@@ -1,9 +0,0 @@
-module RmDecl2 where
-
-sumSquares x y = let sq 0=0
-                     sq z=z^pow
-                 in sq x + sq y
-
-anotherFun 0 y = sq y
-     where  sq x = x^2
-
diff --git a/utils/check-exact/cases/RmDecl2.hs b/utils/check-exact/cases/RmDecl2.hs
deleted file mode 100644
index 2f0dbd3ace..0000000000
--- a/utils/check-exact/cases/RmDecl2.hs
+++ /dev/null
@@ -1,10 +0,0 @@
-module RmDecl2 where
-
-sumSquares x y = let sq 0=0
-                     sq z=z^pow
-                     pow=2
-                 in sq x + sq y
-
-anotherFun 0 y = sq y
-     where  sq x = x^2
-
diff --git a/utils/check-exact/cases/RmDecl3.expected.hs b/utils/check-exact/cases/RmDecl3.expected.hs
deleted file mode 100644
index ca14f33ad5..0000000000
--- a/utils/check-exact/cases/RmDecl3.expected.hs
+++ /dev/null
@@ -1,9 +0,0 @@
-module RmDecl3 where
-
--- Remove last declaration from a where clause, where should disappear too
-ff y = y + zz
-
-zz = 1
-
-foo = 3
--- EOF
diff --git a/utils/check-exact/cases/RmDecl3.hs b/utils/check-exact/cases/RmDecl3.hs
deleted file mode 100644
index 280bccf259..0000000000
--- a/utils/check-exact/cases/RmDecl3.hs
+++ /dev/null
@@ -1,9 +0,0 @@
-module RmDecl3 where
-
--- Remove last declaration from a where clause, where should disappear too
-ff y = y + zz
-  where
-    zz = 1
-
-foo = 3
--- EOF
diff --git a/utils/check-exact/cases/RmDecl4.expected.hs b/utils/check-exact/cases/RmDecl4.expected.hs
deleted file mode 100644
index e7c71dbd08..0000000000
--- a/utils/check-exact/cases/RmDecl4.expected.hs
+++ /dev/null
@@ -1,10 +0,0 @@
-module RmDecl4 where
-
--- Remove first declaration from a where clause, last should still be indented
-ff y = y + zz + xx
-  where
-    xx = 2
-
-zz = 1
-
--- EOF
diff --git a/utils/check-exact/cases/RmDecl4.hs b/utils/check-exact/cases/RmDecl4.hs
deleted file mode 100644
index 532b738763..0000000000
--- a/utils/check-exact/cases/RmDecl4.hs
+++ /dev/null
@@ -1,9 +0,0 @@
-module RmDecl4 where
-
--- Remove first declaration from a where clause, last should still be indented
-ff y = y + zz + xx
-  where
-    zz = 1
-    xx = 2
-
--- EOF
diff --git a/utils/check-exact/cases/RmDecl5.expected.hs b/utils/check-exact/cases/RmDecl5.expected.hs
deleted file mode 100644
index 67ac8ddfab..0000000000
--- a/utils/check-exact/cases/RmDecl5.expected.hs
+++ /dev/null
@@ -1,5 +0,0 @@
-module RmDecl5 where
-
-sumSquares x y = let pow=2
-                 in sq x + sq y
-
diff --git a/utils/check-exact/cases/RmDecl5.hs b/utils/check-exact/cases/RmDecl5.hs
deleted file mode 100644
index 40f86199ce..0000000000
--- a/utils/check-exact/cases/RmDecl5.hs
+++ /dev/null
@@ -1,7 +0,0 @@
-module RmDecl5 where
-
-sumSquares x y = let sq 0=0
-                     sq z=z^pow
-                     pow=2
-                 in sq x + sq y
-
diff --git a/utils/check-exact/cases/RmDecl6.expected.hs b/utils/check-exact/cases/RmDecl6.expected.hs
deleted file mode 100644
index a2bd7d0443..0000000000
--- a/utils/check-exact/cases/RmDecl6.expected.hs
+++ /dev/null
@@ -1,9 +0,0 @@
-module RmDecl6 where
-
-foo a = baz
-  where
-    x = 1
-
-    y :: Int -> Int -> Int
-    y a b = undefined
-
diff --git a/utils/check-exact/cases/RmDecl6.hs b/utils/check-exact/cases/RmDecl6.hs
deleted file mode 100644
index cab5093ce8..0000000000
--- a/utils/check-exact/cases/RmDecl6.hs
+++ /dev/null
@@ -1,12 +0,0 @@
-module RmDecl6 where
-
-foo a = baz
-  where
-    baz :: Int
-    baz = x  + a
-
-    x = 1
-
-    y :: Int -> Int -> Int
-    y a b = undefined
-
diff --git a/utils/check-exact/cases/RmDecl7.expected.hs b/utils/check-exact/cases/RmDecl7.expected.hs
deleted file mode 100644
index 9d7b8b9a69..0000000000
--- a/utils/check-exact/cases/RmDecl7.expected.hs
+++ /dev/null
@@ -1,7 +0,0 @@
-module RmDecl7 where
-
-toplevel :: Integer -> Integer
-toplevel x = c * x
-
-d = 9
-
diff --git a/utils/check-exact/cases/RmDecl7.hs b/utils/check-exact/cases/RmDecl7.hs
deleted file mode 100644
index 62cefe2154..0000000000
--- a/utils/check-exact/cases/RmDecl7.hs
+++ /dev/null
@@ -1,9 +0,0 @@
-module RmDecl7 where
-
-toplevel :: Integer -> Integer
-toplevel x = c * x
-
--- c,d :: Integer
-c = 7
-d = 9
-
diff --git a/utils/check-exact/cases/RmTypeSig1.expected.hs b/utils/check-exact/cases/RmTypeSig1.expected.hs
deleted file mode 100644
index 46f7b13399..0000000000
--- a/utils/check-exact/cases/RmTypeSig1.expected.hs
+++ /dev/null
@@ -1,8 +0,0 @@
-module RmTypeSig1 where
-
-anotherFun :: Int -> Int
-sq 0 = 0
-sq z = z^2
-
-anotherFun x = x^2
-
diff --git a/utils/check-exact/cases/RmTypeSig1.hs b/utils/check-exact/cases/RmTypeSig1.hs
deleted file mode 100644
index 498892d791..0000000000
--- a/utils/check-exact/cases/RmTypeSig1.hs
+++ /dev/null
@@ -1,8 +0,0 @@
-module RmTypeSig1 where
-
-sq,anotherFun :: Int -> Int
-sq 0 = 0
-sq z = z^2
-
-anotherFun x = x^2
-
diff --git a/utils/check-exact/cases/RmTypeSig2.expected.hs b/utils/check-exact/cases/RmTypeSig2.expected.hs
deleted file mode 100644
index c30e201bd0..0000000000
--- a/utils/check-exact/cases/RmTypeSig2.expected.hs
+++ /dev/null
@@ -1,7 +0,0 @@
-module RmTypeSig2 where
-
--- Pattern bind
-tup@(h,t) = (1,ff)
-  where
-    ff = 15
-
diff --git a/utils/check-exact/cases/RmTypeSig2.hs b/utils/check-exact/cases/RmTypeSig2.hs
deleted file mode 100644
index e8771f99dd..0000000000
--- a/utils/check-exact/cases/RmTypeSig2.hs
+++ /dev/null
@@ -1,8 +0,0 @@
-module RmTypeSig2 where
-
--- Pattern bind
-tup@(h,t) = (1,ff)
-  where
-    ff :: Int
-    ff = 15
-
diff --git a/utils/check-exact/cases/WhereIn3a.expected.hs b/utils/check-exact/cases/WhereIn3a.expected.hs
deleted file mode 100644
index acc94d3621..0000000000
--- a/utils/check-exact/cases/WhereIn3a.expected.hs
+++ /dev/null
@@ -1,20 +0,0 @@
-module WhereIn3a where
-
---A definition can be demoted to the local 'where' binding of a friend declaration,
---if it is only used by this friend declaration.
-
---Demoting a definition narrows down the scope of the definition.
---In this example, demote the top level 'sq' to 'sumSquares'
---In this case (there are multi matches), the parameters are not folded after demoting.
-
-sumSquares x y = sq p x + sq p y
-         where p=2  {-There is a comment-}
-
-sq :: Int -> Int -> Int
-sq pow 0 = 0      -- prior comment
-sq pow z = z^pow  --there is a comment
-
--- A leading comment
-anotherFun 0 y = sq y
-     where  sq x = x^2
-
diff --git a/utils/check-exact/cases/WhereIn3a.hs b/utils/check-exact/cases/WhereIn3a.hs
deleted file mode 100644
index acc94d3621..0000000000
--- a/utils/check-exact/cases/WhereIn3a.hs
+++ /dev/null
@@ -1,20 +0,0 @@
-module WhereIn3a where
-
---A definition can be demoted to the local 'where' binding of a friend declaration,
---if it is only used by this friend declaration.
-
---Demoting a definition narrows down the scope of the definition.
---In this example, demote the top level 'sq' to 'sumSquares'
---In this case (there are multi matches), the parameters are not folded after demoting.
-
-sumSquares x y = sq p x + sq p y
-         where p=2  {-There is a comment-}
-
-sq :: Int -> Int -> Int
-sq pow 0 = 0      -- prior comment
-sq pow z = z^pow  --there is a comment
-
--- A leading comment
-anotherFun 0 y = sq y
-     where  sq x = x^2
-
diff --git a/utils/check-exact/cases/WhereIn3b.expected.hs b/utils/check-exact/cases/WhereIn3b.expected.hs
deleted file mode 100644
index 80ddc04825..0000000000
--- a/utils/check-exact/cases/WhereIn3b.expected.hs
+++ /dev/null
@@ -1,27 +0,0 @@
-module WhereIn3a where
-
---A definition can be demoted to the local 'where' binding of a friend declaration,
---if it is only used by this friend declaration.
-
---Demoting a definition narrows down the scope of the definition.
---In this example, demote the top level 'sq' to 'sumSquares'
---In this case (there are multi matches), the parameters are not folded after demoting.
-
--- A leading comment
-anotherFun 0 y = sq y
-     where  sq x = x^2
-
-sq pow 0 = 0      -- prior comment
-sq pow z = z^pow  --there is a comment
-
-sumSquares x y = sq p x + sq p y
-         where p=2  {-There is a comment-}
-
-sq :: Int -> Int -> Int
-sq pow 0 = 0      -- prior comment
-sq pow z = z^pow  --there is a comment
-
--- A leading comment
-anotherFun 0 y = sq y
-     where  sq x = x^2
-
diff --git a/utils/check-exact/cases/WhereIn3b.hs b/utils/check-exact/cases/WhereIn3b.hs
deleted file mode 100644
index acc94d3621..0000000000
--- a/utils/check-exact/cases/WhereIn3b.hs
+++ /dev/null
@@ -1,20 +0,0 @@
-module WhereIn3a where
-
---A definition can be demoted to the local 'where' binding of a friend declaration,
---if it is only used by this friend declaration.
-
---Demoting a definition narrows down the scope of the definition.
---In this example, demote the top level 'sq' to 'sumSquares'
---In this case (there are multi matches), the parameters are not folded after demoting.
-
-sumSquares x y = sq p x + sq p y
-         where p=2  {-There is a comment-}
-
-sq :: Int -> Int -> Int
-sq pow 0 = 0      -- prior comment
-sq pow z = z^pow  --there is a comment
-
--- A leading comment
-anotherFun 0 y = sq y
-     where  sq x = x^2
-
diff --git a/utils/check-exact/cases/WhereIn4.expected.hs b/utils/check-exact/cases/WhereIn4.expected.hs
deleted file mode 100644
index 4357bfdac7..0000000000
--- a/utils/check-exact/cases/WhereIn4.expected.hs
+++ /dev/null
@@ -1,19 +0,0 @@
-module WhereIn4 where
-
---A definition can be demoted to the local 'where' binding of a friend declaration,
---if it is only used by this friend declaration.
-
---Demoting a definition narrows down the scope of the definition.
---In this example, demote the top level 'sq' to 'sumSquares'
---In this case (there is single matches), if possible,
---the parameters will be folded after demoting and type sigature will be removed.
-
-sumSquares x y = sq p x + sq p y
-         where p_2=2  {-There is a comment-}
-
-sq::Int->Int->Int
-sq pow z = z^pow  --there is a comment
-
-anotherFun 0 y = sq y
-     where  sq x = x^2
-
diff --git a/utils/check-exact/cases/WhereIn4.hs b/utils/check-exact/cases/WhereIn4.hs
deleted file mode 100644
index 8b941fff4a..0000000000
--- a/utils/check-exact/cases/WhereIn4.hs
+++ /dev/null
@@ -1,19 +0,0 @@
-module WhereIn4 where
-
---A definition can be demoted to the local 'where' binding of a friend declaration,
---if it is only used by this friend declaration.
-
---Demoting a definition narrows down the scope of the definition.
---In this example, demote the top level 'sq' to 'sumSquares'
---In this case (there is single matches), if possible,
---the parameters will be folded after demoting and type sigature will be removed.
-
-sumSquares x y = sq p x + sq p y
-         where p=2  {-There is a comment-}
-
-sq::Int->Int->Int
-sq pow z = z^pow  --there is a comment
-
-anotherFun 0 y = sq y
-     where  sq x = x^2
-
diff --git a/utils/check-exact/cases/Windows.hs b/utils/check-exact/cases/Windows.hs
deleted file mode 100644
index ad8ae692b6..0000000000
--- a/utils/check-exact/cases/Windows.hs
+++ /dev/null
@@ -1,10 +0,0 @@
-module Windows where
-
-{-
- This file has windows-style line endings, to check that trailing
- \r's get stripped in comments.
--}
-baz = 2
-
--- Another comment
-foo = 1