src/yaml-cpp/regex.h
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 #ifndef REGEX_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 #define REGEX_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
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 #if !defined(__GNUC__) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4) // GCC supports "pragma once" correctly since 3.4
 #pragma once
 #endif
 
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 #include <vector>
 #include <string>
 
 namespace YAML
 {
 	class Stream;
 
 	enum REGEX_OP { REGEX_EMPTY, REGEX_MATCH, REGEX_RANGE, REGEX_OR, REGEX_AND, 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() {}
 
 		friend RegEx operator ! (const RegEx& ex);
 		friend RegEx operator || (const RegEx& ex1, const RegEx& ex2);
 		friend RegEx operator && (const RegEx& ex1, const RegEx& ex2);
 		friend RegEx operator + (const RegEx& ex1, const RegEx& ex2);
 		
 		bool Matches(char ch) const;
 		bool Matches(const std::string& str) const;
 		bool Matches(const Stream& in) const;
 		template <typename Source> bool Matches(const Source& source) const;
 
 		int Match(const std::string& str) const;
 		int Match(const Stream& in) const;
 		template <typename Source> int Match(const Source& source) const;
 
 	private:
 		RegEx(REGEX_OP op);
 		
 		template <typename Source> bool IsValidSource(const Source& source) const;
 		template <typename Source> int MatchUnchecked(const Source& source) const;
 
 		template <typename Source> int MatchOpEmpty(const Source& source) const;
 		template <typename Source> int MatchOpMatch(const Source& source) const;
 		template <typename Source> int MatchOpRange(const Source& source) const;
 		template <typename Source> int MatchOpOr(const Source& source) const;
 		template <typename Source> int MatchOpAnd(const Source& source) const;
 		template <typename Source> int MatchOpNot(const Source& source) const;
 		template <typename Source> int MatchOpSeq(const Source& source) const;
 
 	private:
 		REGEX_OP m_op;
 		char m_a, m_z;
 		std::vector <RegEx> m_params;
 	};
 }
 
 #include "regeximpl.h"
 
 #endif // REGEX_H_62B23520_7C8E_11DE_8A39_0800200C9A66