Save state before re-write of RegEx.

src/Lexer.cpp

@@ -20,6 +20,7 @@ void Lexer::setInput(std::string inputString) {
 }
 
 void Lexer::addRegEx(std::string regExString) {
+    std::cout << regExString << " at lexer" << std::endl;
 	regExs.push_back(new RegEx(regExString));
 }