Wrote a simplified regular expression parser to make life easier (it only does single matches; i.e., no one-or-more matches, etc.).

Fixed some of the whitespace/line break matching.

regex.h

@@ -0,0 +1,37 @@
+#pragma once
+
+#include <vector>
+#include <string>
+
+namespace YAML
+{
+	enum REGEX_OP { REGEX_EMPTY, REGEX_MATCH, REGEX_RANGE, REGEX_OR, REGEX_NOT, REGEX_SEQ };
+
+	// simplified regular expressions
+	// . Only straightforward matches (no repeated characters)
+	// . Only matches from start of string
+	class RegEx {
+	public:
+		RegEx();
+		RegEx(char ch);
+		RegEx(char a, char z);
+		RegEx(const std::string& str, REGEX_OP op = REGEX_SEQ); 
+		~RegEx();
+
+		bool Matches(char ch) const;
+		bool Matches(const std::string& str) const;
+		int Match(const std::string& str) const;
+
+		friend RegEx operator ! (const RegEx& ex);
+		friend RegEx operator || (const RegEx& ex1, const RegEx& ex2);
+		friend RegEx operator + (const RegEx& ex1, const RegEx& ex2);
+
+	private:
+		RegEx(REGEX_OP op);
+
+	private:
+		REGEX_OP m_op;
+		char m_a, m_z;
+		std::vector <RegEx> m_params;
+	};
+}