Added header file inclusion guards

include/conversion.h

 #pragma once
 
+#ifndef CONVERSION_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define CONVERSION_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 #include <string>
 #include <sstream>
 
@@ -36,3 +40,5 @@ namespace YAML
 	template <>
 	bool Converter<std::wstring>::Convert(const std::string& input, std::wstring& output);
 }
+
+#endif // CONVERSION_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/crt.h

 #pragma once
 
+#ifndef CRT_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define CRT_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 // for detecting memory leaks
 #ifdef _DEBUG
 
@@ -9,3 +13,5 @@
 
 #endif // _DEBUG
 
+
+#endif // CRT_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/emitter.h

 #pragma once
 
+#ifndef EMITTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define EMITTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 #include "emittermanip.h"
 #include "ostream.h"
 #include <memory>
@@ -84,3 +88,5 @@ namespace YAML
 		return emitter.SetLocalIndent(indent);
 	}
 }
+
+#endif // EMITTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/emittermanip.h

 #pragma once
 
+#ifndef EMITTERMANIP_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define EMITTERMANIP_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 #include <string>
 
 namespace YAML
@@ -82,3 +86,5 @@ namespace YAML
 		return _Comment(content);
 	}
 }
+
+#endif // EMITTERMANIP_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/exceptions.h

 #pragma once
 
+#ifndef EXCEPTIONS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define EXCEPTIONS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 #include "mark.h"
 #include <exception>
 #include <string>
@@ -129,3 +133,5 @@ namespace YAML
 		: Exception(Mark::null(), msg_) {}
 	};
 }
+
+#endif // EXCEPTIONS_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/iterator.h

 #pragma once
 
+#ifndef ITERATOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define ITERATOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 namespace YAML
 {
 	class Node;
@@ -28,3 +32,5 @@ namespace YAML
 		IterPriv *m_pData;
 	};
 }
+
+#endif // ITERATOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/mark.h

 #pragma once
 
+#ifndef MARK_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define MARK_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 namespace YAML
 {
 	struct Mark {
@@ -14,3 +18,5 @@ namespace YAML
 		Mark(int pos_, int line_, int column_): pos(pos_), line(line_), column(column_) {}
 	};
 }
+
+#endif // MARK_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/node.h

 #pragma once
 
+#ifndef NODE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define NODE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 #include "conversion.h"
 #include "exceptions.h"
 #include "iterator.h"
@@ -95,3 +99,5 @@ namespace YAML
 }
 
 #include "nodeimpl.h"
+
+#endif // NODE_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/nodeimpl.h

 #pragma once
 
+#ifndef NODEIMPL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define NODEIMPL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 namespace YAML
 {
 	// implementation of templated things
@@ -63,3 +67,5 @@ namespace YAML
 		return GetValue(std::string(key));
 	}
 }
+
+#endif // NODEIMPL_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/noncopyable.h

 #pragma once
 
+#ifndef NONCOPYABLE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define NONCOPYABLE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 namespace YAML
 {
 	// this is basically boost::noncopyable
@@ -14,3 +18,5 @@ namespace YAML
 			const noncopyable& operator = (const noncopyable&);
 		};
 }
+
+#endif // NONCOPYABLE_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/ostream.h

 #pragma once
 
+#ifndef OSTREAM_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define OSTREAM_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 #include <string>
 
 namespace YAML
@@ -30,3 +34,5 @@ namespace YAML
 	ostream& operator << (ostream& out, const std::string& str);
 	ostream& operator << (ostream& out, char ch);
 }
+
+#endif // OSTREAM_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/parser.h

 #pragma once
 
+#ifndef PARSER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define PARSER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 #include <ios>
 #include <string>
 #include <vector>
@@ -40,3 +44,5 @@ namespace YAML
 		ParserState m_state;
 	};
 }
+
+#endif // PARSER_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/parserstate.h

 #pragma once
 
+#ifndef PARSERSTATE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define PARSERSTATE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 #include <string>
 #include <map>
 
@@ -18,3 +22,5 @@ namespace YAML
 		std::string TranslateTag(const std::string& handle) const;
 	};
 }
+
+#endif // PARSERSTATE_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/stlemitter.h

 #pragma once
 
+#ifndef STLEMITTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define STLEMITTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 #include <vector>
 #include <list>
 #include <map>
@@ -36,3 +40,5 @@ namespace YAML
 		return emitter;
 	}
 }
+
+#endif // STLEMITTER_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/yaml.h

 #pragma once
 
+#ifndef YAML_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define YAML_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 #include "crt.h"
 #include "parser.h"
 #include "node.h"
@@ -7,3 +11,5 @@
 #include "emitter.h"
 #include "stlemitter.h"
 #include "exceptions.h"
+
+#endif // YAML_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/aliascontent.h

 #pragma once
 
+#ifndef ALIASCONTENT_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define ALIASCONTENT_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 #include "content.h"
 
 namespace YAML
@@ -33,3 +37,5 @@ namespace YAML
 		Content* m_pRef;
 	};
 }
+
+#endif // ALIASCONTENT_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/content.h

 #pragma once
 
+#ifndef CONTENT_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define CONTENT_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 #include <vector>
 #include <map>
 #include "parserstate.h"
@@ -47,3 +51,5 @@ namespace YAML
 	protected:
 	};
 }
+
+#endif // CONTENT_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/emitterstate.h

 #pragma once
 
+#ifndef EMITTERSTATE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define EMITTERSTATE_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 #include "setting.h"
 #include "emittermanip.h"
 #include <cassert>
@@ -193,3 +197,5 @@ namespace YAML
 		}
 	}
 }
+
+#endif // EMITTERSTATE_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/emitterutils.h

 #pragma once
 
+#ifndef EMITTERUTILS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define EMITTERUTILS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 #include "ostream.h"
 #include <string>
 
@@ -16,3 +20,5 @@ namespace YAML
 		bool WriteAnchor(ostream& out, const std::string& str);
 	}
 }
+
+#endif // EMITTERUTILS_H_62B23520_7C8E_11DE_8A39_0800200C9A66

src/exp.h

 #pragma once
 
+#ifndef EXP_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define EXP_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+
 #include "regex.h"
 #include <string>
 #include <ios>
@@ -72,3 +76,5 @@ namespace YAML
 		const char FoldedScalar = '>';
 	}
 }
+
+#endif // EXP_H_62B23520_7C8E_11DE_8A39_0800200C9A66