Added an iterator class that can iterate through both sequence and map nodes.

scalar.cpp

@@ -1,6 +1,8 @@
 #include "scalar.h"
 #include "scanner.h"
 #include "token.h"
+#include "exceptions.h"
+#include <sstream>
 
 namespace YAML
 {
@@ -28,4 +30,57 @@ namespace YAML
 			out << "  ";
 		out << m_data << std::endl;
 	}
+
+	void Scalar::Read(std::string& s)
+	{
+		s = m_data;
+	}
+
+	void Scalar::Read(int& i)
+	{
+		std::stringstream data(m_data);
+		data >> i;
+		if(!data)
+			throw InvalidScalar();
+	}
+
+	void Scalar::Read(unsigned& u)
+	{
+		std::stringstream data(m_data);
+		data >> u;
+		if(!data)
+			throw InvalidScalar();
+	}
+
+	void Scalar::Read(long& l)
+	{
+		std::stringstream data(m_data);
+		data >> l;
+		if(!data)
+			throw InvalidScalar();
+	}
+	
+	void Scalar::Read(float& f)
+	{
+		std::stringstream data(m_data);
+		data >> f;
+		if(!data)
+			throw InvalidScalar();
+	}
+	
+	void Scalar::Read(double& d)
+	{
+		std::stringstream data(m_data);
+		data >> d;
+		if(!data)
+			throw InvalidScalar();
+	}
+
+	void Scalar::Read(char& c)
+	{
+		std::stringstream data(m_data);
+		data >> c;
+		if(!data)
+			throw InvalidScalar();
+	}
 }