external_libraries/yaml-cpp-0.3.0/include/yaml-cpp/null.h

   1 #ifndef NULL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
   2 #define NULL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
   3
   4 #if defined(_MSC_VER) || (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || (__GNUC__ >= 4)) // GCC supports "pragma once" correctly since 3.4
   5 #pragma once
   6 #endif
   7
   8
   9 #include "yaml-cpp/dll.h"
  10
  11 namespace YAML
  12 {
  13         class Node;
  14
  15         struct YAML_CPP_API _Null {};
  16         inline bool operator == (const _Null&, const _Null&) { return true; }
  17         inline bool operator != (const _Null&, const _Null&) { return false; }
  18
  19         YAML_CPP_API bool IsNull(const Node& node); // old API only
  20
  21         extern YAML_CPP_API _Null Null;
  22 }
  23
  24 #endif // NULL_H_62B23520_7C8E_11DE_8A39_0800200C9A66
  25