in example-based grammar conversion, warnings about unknown words

src/runtime/haskell/PGF/Morphology.hs

@@ -1,6 +1,7 @@
 module PGF.Morphology(Lemma,Analysis,Morpho,
                       buildMorpho,
-                      lookupMorpho,fullFormLexicon) where
+                      lookupMorpho,fullFormLexicon,
+                      morphoMissing,missingWordMsg) where
 
 import PGF.CId
 import PGF.Data
@@ -10,6 +11,7 @@ import qualified Data.Set as Set
 import qualified Data.IntMap as IntMap
 import Data.Array.IArray
 import Data.List (intersperse)
+import Data.Char (isDigit) ----
 
 -- these 4 definitions depend on the datastructure used
 
@@ -42,3 +44,13 @@ lookupMorpho (Morpho mo) s = maybe [] id $ Map.lookup s mo
 
 fullFormLexicon :: Morpho -> [(String,[(Lemma,Analysis)])]
 fullFormLexicon (Morpho mo) = Map.toList mo
+
+morphoMissing :: Morpho -> [String] -> [String]
+morphoMissing mo ws = [w | w <- ws, null (lookupMorpho mo w), notLiteral w] where
+  notLiteral w = not (all isDigit w) ---- should be defined somewhere
+
+missingWordMsg :: Morpho -> [String] -> String
+missingWordMsg morpho ws = case morphoMissing morpho ws of
+  [] -> ", but all words are known"
+  ws -> "; unknown words: " ++ unwords ws
+