Add substitution operation

src/GEval/EvaluationScheme.hs

@@ -27,6 +27,7 @@ data PreprocessingOperation = RegexpMatch Regex
                               | Sorting
                               | SetName Text
                               | SetPriority Int
+                              | RegexpSubstition Regex Text
   deriving (Eq)
 
 leftParameterBracket :: Char
@@ -53,15 +54,33 @@ readOps ('S':theRest) = (Sorting:ops, theRest')
     where (ops, theRest') = readOps theRest
 readOps ('N':theRest) = handleParametrizedOp (SetName . pack) theRest
 readOps ('P':theRest) = handleParametrizedOp (SetPriority . read) theRest
+readOps ('s':theRest) = handleParametrizedBinaryOp (\a b -> RegexpSubstition (fromRight undefined $ compileM (BSU.fromString a) []) (pack b)) theRest
 readOps s = ([], s)
 
 handleParametrizedOp :: (String -> PreprocessingOperation) -> String -> ([PreprocessingOperation], String)
-handleParametrizedOp constructor (leftParameterBracket:theRest) =
-  case break (== rightParameterBracket) theRest of
-    (s, []) -> ([], s)
-    (param, (_:theRest')) -> let (ops, theRest'') = readOps theRest'
+handleParametrizedOp constructor theRest =
+  case parseParameter theRest of
+    (Nothing, s) -> ([], s)
+    (Just param, theRest') -> let (ops, theRest'') = readOps theRest'
                              in ((constructor param):ops, theRest'')
-handleParametrizedOp _ s = ([], s)
+
+handleParametrizedBinaryOp :: (String -> String -> PreprocessingOperation) -> String -> ([PreprocessingOperation], String)
+handleParametrizedBinaryOp constructor theRest =
+  case parseParameter theRest of
+    (Nothing, s) -> ([], s)
+    (Just paramA, theRest') ->
+      case parseParameter theRest' of
+        (Nothing, s) -> ([], s)
+        (Just paramB, theRest'') -> let (ops, theRest''') = readOps theRest''
+                                   in ((constructor paramA paramB):ops, theRest''')
+
+parseParameter :: String -> (Maybe String, String)
+parseParameter (leftParameterBracket:theRest) =
+  case break (== rightParameterBracket) theRest of
+    (s, []) -> (Nothing, s)
+    (param, (_:theRest')) -> (Just param, theRest')
+parseParameter s = (Nothing, s)
+
 
 instance Show EvaluationScheme where
   show (EvaluationScheme metric operations) = (show metric) ++ (if null operations
@@ -97,9 +116,28 @@ instance Show PreprocessingOperation where
   show Sorting = "S"
   show (SetName t) = parametrizedOperation "N" (unpack t)
   show (SetPriority p) = parametrizedOperation "P" (show p)
+  show (RegexpSubstition (Regex _ regexp) s) = "s" ++ (formatParameter $ BSU.toString regexp) ++ (formatParameter $ unpack s)
+
+applySubstitution :: Regex -> Text -> Text -> Text
+applySubstitution r substitution t =
+  gsub r (handleRefs substitution) t
+
+handleRefs :: Text -> Text -> [Text] -> Text
+handleRefs substitution mainMatch subMatches = gsub refRegexp handleRef substitution
+  where Right refRegexp = compileM (BSU.fromString "\\\\\\d+") []
+        indexables = mainMatch : subMatches
+        handleRef :: Text -> Text
+        handleRef ref =
+          let ix = (read $ tail $ unpack ref)
+          in if ix >= length indexables
+             then (pack "")
+             else indexables !! ix
 
 parametrizedOperation :: String -> String -> String
-parametrizedOperation opCode opArg = opCode ++ [leftParameterBracket] ++ opArg ++ [rightParameterBracket]
+parametrizedOperation opCode opArg = opCode ++ (formatParameter opArg)
+
+formatParameter :: String -> String
+formatParameter p = [leftParameterBracket] ++ p ++ [rightParameterBracket]
 
 applyPreprocessingOperations :: EvaluationScheme -> Text -> Text
 applyPreprocessingOperations (EvaluationScheme _ operations) t = foldl (flip applyPreprocessingOperation) t operations
@@ -111,3 +149,4 @@ applyPreprocessingOperation UpperCasing = toUpper
 applyPreprocessingOperation Sorting = Data.Text.unwords . sort . Data.Text.words
 applyPreprocessingOperation (SetName _) = id
 applyPreprocessingOperation (SetPriority _) = id
+applyPreprocessingOperation (RegexpSubstition regex substition) = applySubstitution regex substition

test/Spec.hs

@@ -339,6 +339,8 @@ main = hspec $ do
   describe "Preprocessing operations" $ do
     it "F1 with preprocessing" $ do
       runGEvalTest "f1-with-preprocessing" `shouldReturnAlmost` 0.57142857142857
+    it "Regexp substition" $ do
+      runGEvalTest "accuracy-with-flags" `shouldReturnAlmost` 0.8
   describe "evaluating single lines" $ do
     it "RMSE" $ do
       (MetricOutput v _) <- gevalCoreOnSingleLines RMSE id RawItemTarget

test/accuracy-with-flags/accuracy-with-flags-solution/test-A/out.tsv

@@ -0,0 +1,5 @@
+b88 b901
+a100
+a93
+t34
+y23

test/accuracy-with-flags/accuracy-with-flags/config.txt

@@ -0,0 +1 @@
+--metric Accuracy:s<[abc](\d+)><!\1>

test/accuracy-with-flags/accuracy-with-flags/test-A/expected.tsv

@@ -0,0 +1,5 @@
+a88 b901
+c100
+b93
+t34
+z23