Added support for null rules, works well.

2013-07-09 02:45:59 -04:00
parent 4c2fd967f0
commit 1c85e3693e
5 changed files with 90 additions and 38 deletions
--- a/include/Parser.h
+++ b/include/Parser.h
@@ -47,6 +47,11 @@ class Parser {

 		std::vector< State* > stateSets;

+		//The EOFSymbol, a pointer because of use in table, etc
+		Symbol* EOFSymbol;
+		//The nullSymbol, ditto with above. Also used in comparisons
+		Symbol* nullSymbol;
+
 		std::vector< std::vector<ParseAction*>* >  table;
 		std::vector<Symbol*> symbolIndexVec;