--- a/Implab/Formats/Grammar.cs	Sat Sep 09 03:53:13 2017 +0300
+++ b/Implab/Formats/Grammar.cs	Tue Sep 12 01:19:12 2017 +0300
@@ -67,32 +67,6 @@
 
             return Token.New( Enumerable.Range(0, AlphabetBuilder.Count).Except(TranslateOrDie(symbols)).ToArray() );
         }
-
-        protected abstract IndexedAlphabetBase<TSymbol> CreateAlphabet();
-
-        protected ScannerContext<TTag> BuildScannerContext<TTag>(Token regexp) {
-            
-            var dfa = new RegularDFA<TSymbol, TTag>(AlphabetBuilder);
-
-            var visitor = new RegularExpressionVisitor<TTag>(dfa);
-            regexp.Accept(visitor);
-            visitor.BuildDFA();
-
-            if (dfa.IsFinalState(dfa.InitialState))
-                throw new ApplicationException("The specified language contains empty token");
-
-            var ab = CreateAlphabet();
-            var optimal = dfa.Optimize(ab);
-
-            return new ScannerContext<TTag>(
-                optimal.CreateTransitionTable(),
-                optimal.CreateFinalStateTable(),
-                optimal.CreateTagTable(),
-                optimal.InitialState,
-                ab.GetTranslationMap()
-            );
-        }
-
     }