From 14fc410e00997f17b7da6b80e53d210cf1b3d0a2 Mon Sep 17 00:00:00 2001
From: Nathan Braswell <nathan@nathanbraswell.com>
Date: Mon, 20 May 2013 23:26:15 -0400
Subject: [PATCH] Added clone method and pointer location to toString in
 ParseRule

---
 include/ParseRule.h |  5 +++++
 src/ParseRule.cpp   | 22 ++++++++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/include/ParseRule.h b/include/ParseRule.h
index 368ca0a..4cc0289 100644
--- a/include/ParseRule.h
+++ b/include/ParseRule.h
@@ -14,11 +14,16 @@
 class ParseRule {
 	public:
 		ParseRule();
+		ParseRule(Symbol* leftHandle, int pointerIndex, std::vector<Symbol*> &rightSide);
 		~ParseRule();
 
+		ParseRule* clone();
+
 		void setLeftHandle(Symbol* leftHandle);
 		void appendToRight(Symbol* appendee);
 
+		bool advancePointer();
+
 		std::string toString();
 		std::string toDOT();
 
diff --git a/src/ParseRule.cpp b/src/ParseRule.cpp
index a620289..14c4d40 100644
--- a/src/ParseRule.cpp
+++ b/src/ParseRule.cpp
@@ -5,10 +5,20 @@ ParseRule::ParseRule() {
 	leftHandle = NULL;
 }
 
+ParseRule::ParseRule(Symbol* leftHandle, int pointerIndex, std::vector<Symbol*> &rightSide) {
+	this->leftHandle = leftHandle;
+	this->pointerIndex = pointerIndex;
+	this->rightSide = rightSide;
+}
+
 ParseRule::~ParseRule() {
 
 }
 
+ParseRule* ParseRule::clone() {
+	return( new ParseRule(leftHandle, pointerIndex, rightSide) );
+}
+
 void ParseRule::setLeftHandle(Symbol* leftHandle) {
 	this->leftHandle = leftHandle;
 }
@@ -17,11 +27,23 @@ void ParseRule::appendToRight(Symbol* appendee) {
 	rightSide.push_back(appendee);
 }
 
+bool ParseRule::advancePointer() {
+	if (pointerIndex < rightSide.size()) {
+		pointerIndex++;
+		return true;
+	}
+	return false;
+}
+
 std::string ParseRule::toString() {
 	std::string concat = leftHandle->toString() + " -> ";
 	for (int i = 0; i < rightSide.size(); i++) {
+		if (i == pointerIndex)
+			concat += "(*) ";
 		concat += rightSide[i]->toString() + " ";
 	}
+	if (pointerIndex >= rightSide.size())
+		concat += "(*)";
 	return(concat);
 }