#ifndef NULL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
#define NULL_H_62B23520_7C8E_11DE_8A39_0800200C9A66

#if defined(_MSC_VER) || \
	(defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4))  // GCC supports "pragma once" correctly since 3.4
#pragma once
#endif

#include <string>
#include "yaml-cpp/dll.h"

namespace YAML {
class Node;

struct YAML_CPP_API _Null {};
inline bool operator==(const _Null&, const _Null&) { return true; }
inline bool operator!=(const _Null&, const _Null&) { return false; }

YAML_CPP_API bool IsNull(const Node& node);	 // old API only
YAML_CPP_API bool IsNullString(const std::string& str);

extern YAML_CPP_API _Null Null;
}  // namespace YAML

#endif	// NULL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
