include/yaml-cpp/eventhandler.h

0001 #ifndef EVENTHANDLER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
0002 #define EVENTHANDLER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
0003
0004 #if defined(_MSC_VER) ||                                            \
0005     (defined(__GNUC__) && (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) || \
0006      (__GNUC__ >= 4))  // GCC supports "pragma once" correctly since 3.4
0007 #pragma once
0008 #endif
0009
0010 #include <string>
0011
0012 #include "yaml-cpp/anchor.h"
0013 #include "yaml-cpp/emitterstyle.h"
0014
0015 namespace YAML {
0016 struct Mark;
0017
0018 class EventHandler {
0019  public:
0020   virtual ~EventHandler() = default;
0021
0022   virtual void OnDocumentStart(const Mark& mark) = 0;
0023   virtual void OnDocumentEnd() = 0;
0024
0025   virtual void OnNull(const Mark& mark, anchor_t anchor) = 0;
0026   virtual void OnAlias(const Mark& mark, anchor_t anchor) = 0;
0027   virtual void OnScalar(const Mark& mark, const std::string& tag,
0028                         anchor_t anchor, const std::string& value) = 0;
0029
0030   virtual void OnSequenceStart(const Mark& mark, const std::string& tag,
0031                                anchor_t anchor, EmitterStyle::value style) = 0;
0032   virtual void OnSequenceEnd() = 0;
0033
0034   virtual void OnMapStart(const Mark& mark, const std::string& tag,
0035                           anchor_t anchor, EmitterStyle::value style) = 0;
0036   virtual void OnMapEnd() = 0;
0037
0038   virtual void OnAnchor(const Mark& /*mark*/,
0039                         const std::string& /*anchor_name*/) {
0040     // empty default implementation for compatibility
0041   }
0042 };
0043 }  // namespace YAML
0044
0045 #endif  // EVENTHANDLER_H_62B23520_7C8E_11DE_8A39_0800200C9A66