Much ado about nothing

1 files changed, 94 insertions, 0 deletions

diff --git a/interactive-edit-lens/src/Main.hs b/interactive-edit-lens/src/Main.hs
new file mode 100644
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+++ b/interactive-edit-lens/src/Main.hs
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+{-# LANGUAGE OverloadedStrings
+           , ExistentialQuantification
+  #-}
+
+module Main where
+
+import Interact
+import Control.DFST.Lens
+import Control.DFST
+
+import Data.Map (Map)
+import qualified Data.Map as Map
+
+import Data.Set (Set)
+import qualified Data.Set as Set
+
+import Data.Sequence (Seq)
+import qualified Data.Sequence as Seq
+
+import Data.Char
+
+import System.Environment
+import System.Exit
+
+import Debug.Trace
+
+data SomeDFST = forall state. (Ord state, Show state) => SomeDFST { someDFST :: DFST state Char Char }
+
+data JsonNewlState = JNUndeterminedStructure | JNOutsideStructure | JNInsideStructure | JNInsideString | JNEscape
+  deriving (Eq, Ord, Show, Read)
+
+dfstMap :: String -> Maybe SomeDFST
+dfstMap "double" = Just . SomeDFST $ DFST
+  { stInitial = ()
+  , stTransition = mconcat
+    [ Map.fromList 
+        [(((), sym), ((), Seq.fromList [sym, sym])) | sym <- ['a'..'z'] ++ ['A'..'Z'] ++ ['!', ' ']] -- sym <- [minBound..maxBound], isPrint sym]
+    , Map.singleton ((), '\n') ((), Seq.singleton '\n')
+    ]
+  , stAccept = Set.singleton ()
+  }
+dfstMap "id" = Just . SomeDFST $ DFST
+  { stInitial = ()
+  , stTransition = Map.fromList 
+      [(((), sym), ((), Seq.singleton sym)) | sym <- ['a'..'z'] ++ ['A'..'Z'] ++ ['!', ' ']] -- sym <- [minBound..maxBound], isPrint sym]
+  , stAccept = Set.singleton ()
+  }
+dfstMap "alternate" = Just . SomeDFST $ DFST
+  { stInitial = 0 :: Int
+  , stTransition = mconcat
+    [ Map.fromList [((0, sym), (1, Seq.singleton sym)) | sym <- ['a'..'z'] ++ ['A'..'Z'] ++ ['!', ' ']] -- sym <- [minBound..maxBound], isPrint sym]
+    , Map.fromList [((1, sym), (0, Seq.fromList [toUpper sym, toUpper sym])) | sym <- ['a'..'z'] ++ ['A'..'Z'] ++ ['!', ' ']] -- sym <- [minBound..maxBound], isPrint sym]
+    ]
+  , stAccept = Set.fromList [0]
+  }
+dfstMap "json-newl" = Just . SomeDFST $ DFST
+  { stInitial = JNOutsideStructure
+  , stTransition = mconcat
+    [ Map.fromList [((jnOutside, sym), (jnOutside, Seq.empty)) | sym <- whitespace, jnOutside <- [JNOutsideStructure, JNUndeterminedStructure]]
+    , Map.fromList [((jnOutside, sym), (JNInsideStructure, Seq.fromList [sym, ' '])) | sym <- "[{", jnOutside <- [JNOutsideStructure, JNInsideStructure, JNUndeterminedStructure]]
+    , Map.fromList [((JNInsideStructure, sym), (JNInsideStructure, Seq.empty)) | sym <- whitespace]
+    , Map.fromList [((jnInside, sym), (JNUndeterminedStructure, Seq.fromList ['\n', sym])) | sym <- "]}", jnInside <- [JNInsideStructure, JNUndeterminedStructure]]
+    , Map.fromList [((jnInside, ','), (JNInsideStructure, Seq.fromList "\n, ")) | jnInside <- [JNInsideStructure, JNUndeterminedStructure] ]
+    , Map.fromList [((jnInside, ':'), (JNInsideStructure, Seq.fromList " : ")) | jnInside <- [JNInsideStructure, JNUndeterminedStructure] ]
+    , Map.fromList [((jn, '"'), (JNInsideString, Seq.singleton '"')) | jn <- [JNUndeterminedStructure, JNInsideStructure]]
+    , Map.fromList [((JNInsideString, sym), (JNInsideString, Seq.singleton sym)) | sym <- ['a'..'z'] ++ ['A'..'Z'] ++ ",.!?: "]
+    , Map.singleton (JNInsideString, '"') (JNUndeterminedStructure, Seq.singleton '"')
+    , Map.singleton (JNInsideString, '\\') (JNEscape, Seq.singleton '\\')
+    , Map.singleton (JNEscape, '"') (JNInsideString, Seq.singleton '"')
+    ]
+  , stAccept = Set.fromList [JNOutsideStructure, JNUndeterminedStructure]
+  }
+  where
+    whitespace = toEnum <$> [0x0020, 0x0009, 0x000a, 0x000d]
+dfstMap _ = Nothing
+
+main :: IO ()
+main = do
+  args <- getArgs
+
+  dfst <- case args of
+    [name] | Just dfst <- dfstMap name
+      -> return dfst
+    _ -> exitWith $ ExitFailure 2
+
+  interactiveEditLens' dfst
+
+interactiveEditLens' :: SomeDFST -> IO ()
+interactiveEditLens' (SomeDFST dfst)
+  = interactiveEditLens id $ InteractConfig
+      { icfgInitial = InitialEmpty
+      , icfgLens = dfstLens dfst
+      , icfgCompileError = Nothing
+      }