Reintegrated the event-api branch (second iteration) into the rtweeks21-staging branch.

include/aliasmanager.h

@@ -0,0 +1,38 @@
+#pragma once
+
+#ifndef ALIASMANAGER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define ALIASMANAGER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+#include "anchor.h"
+#include <map>
+
+namespace YAML
+{
+	class Node;
+	
+	class AliasManager
+	{
+	public:
+		AliasManager();
+		
+		void RegisterReference(const Node& node);
+		
+		const Node *LookupReference(const Node& node) const;
+		anchor_t LookupAnchor(const Node& node) const;
+		
+	private:
+		const Node *_LookupReference(const Node& oldIdentity) const;
+		anchor_t _CreateNewAnchor();
+		
+	private:
+		typedef std::map<const Node*, const Node*> NodeByNode;
+		NodeByNode m_newIdentityByOldIdentity;
+		
+		typedef std::map<const Node*, anchor_t> AnchorByIdentity;
+		AnchorByIdentity m_anchorByIdentity;
+		
+		anchor_t m_curAnchor;
+	};
+}
+
+#endif // ALIASMANAGER_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/anchor.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#ifndef ANCHOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define ANCHOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+#include <cstddef>
+
+namespace YAML
+{
+	typedef std::size_t anchor_t;
+	const anchor_t NullAnchor = 0;
+}
+
+#endif // ANCHOR_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/emitfromevents.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#ifndef EMITFROMEVENTS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define EMITFROMEVENTS_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+#include "eventhandler.h"
+#include <stack>
+
+namespace YAML
+{
+	class Emitter;
+	
+	class EmitFromEvents: public EventHandler
+	{
+	public:
+		EmitFromEvents(Emitter& emitter);
+		
+		virtual void OnDocumentStart(const Mark& mark);
+		virtual void OnDocumentEnd();
+		
+		virtual void OnNull(const std::string& tag, anchor_t anchor);
+		virtual void OnAlias(const Mark& mark, anchor_t anchor);
+		virtual void OnScalar(const Mark& mark, const std::string& tag, anchor_t anchor, const std::string& value);
+		
+		virtual void OnSequenceStart(const Mark& mark, const std::string& tag, anchor_t anchor);
+		virtual void OnSequenceEnd();
+		
+		virtual void OnMapStart(const Mark& mark, const std::string& tag, anchor_t anchor);
+		virtual void OnMapEnd();
+		
+	private:
+		void BeginNode();
+		void EmitProps(const std::string& tag, anchor_t anchor);
+		
+	private:
+		Emitter& m_emitter;
+		
+		struct State { enum value { WaitingForSequenceEntry, WaitingForKey, WaitingForValue }; };
+		std::stack<State::value> m_stateStack;
+	};
+}
+
+#endif // EMITFROMEVENTS_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/eventhandler.h

@@ -0,0 +1,34 @@
+#pragma once
+
+#ifndef EVENTHANDLER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define EVENTHANDLER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+#include "anchor.h"
+#include <string>
+
+namespace YAML
+{
+	struct Mark;
+	
+	class EventHandler
+	{
+	public:
+		virtual ~EventHandler() {}
+
+		virtual void OnDocumentStart(const Mark& mark) = 0;
+		virtual void OnDocumentEnd() = 0;
+		
+		virtual void OnNull(const std::string& tag, anchor_t anchor) = 0;
+		virtual void OnAlias(const Mark& mark, anchor_t anchor) = 0;
+		virtual void OnScalar(const Mark& mark, const std::string& tag, anchor_t anchor, const std::string& value) = 0;
+
+		virtual void OnSequenceStart(const Mark& mark, const std::string& tag, anchor_t anchor) = 0;
+		virtual void OnSequenceEnd() = 0;
+
+		virtual void OnMapStart(const Mark& mark, const std::string& tag, anchor_t anchor) = 0;
+		virtual void OnMapEnd() = 0;
+	};
+}
+
+#endif // EVENTHANDLER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+

include/graphbuilder.h

@@ -0,0 +1,117 @@
+#ifndef GRAPHBUILDER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define GRAPHBUILDER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+#include <string>
+
+namespace YAML
+{
+  struct Mark;
+  
+  // GraphBuilderInterface
+  // . Abstraction of node creation
+  // . pParentNode is always NULL or the return value of one of the NewXXX()
+  //   functions.
+  class GraphBuilderInterface
+  {
+  public:
+    // Create and return a new node with a null value.
+    virtual void *NewNull(const std::string& tag, void *pParentNode) = 0;
+    
+    // Create and return a new node with the given tag and value.
+    virtual void *NewScalar(const Mark& mark, const std::string& tag, void *pParentNode, const std::string& value) = 0;
+    
+    // Create and return a new sequence node
+    virtual void *NewSequence(const Mark& mark, const std::string& tag, void *pParentNode) = 0;
+    // Add pNode to pSequence.  pNode was created with one of the NewXxx()
+    // functions and pSequence with NewSequence().
+    virtual void AppendToSequence(void *pSequence, void *pNode) = 0;
+    // Note that no moew entries will be added to pSequence
+    virtual void SequenceComplete(void *pSequence) {(void)pSequence;}
+    
+    // Create and return a new map node
+    virtual void *NewMap(const Mark& mark, const std::string& tag, void *pParentNode) = 0;
+    // Add the pKeyNode => pValueNode mapping to pMap.  pKeyNode and pValueNode
+    // were created with one of the NewXxx() methods and pMap with NewMap().
+    virtual void AssignInMap(void *pMap, void *pKeyNode, void *pValueNode) = 0;
+    // Note that no more assignments will be made in pMap
+    virtual void MapComplete(void *pMap) {(void)pMap;}
+    
+    // Return the node that should be used in place of an alias referencing
+    // pNode (pNode by default)
+    virtual void *AnchorReference(const Mark& mark, void *pNode) {(void)mark; return pNode;}
+  };
+  
+  // Typesafe wrapper for GraphBuilderInterface.  Assumes that Impl defines
+  // Node, Sequence, and Map types.  Sequence and Map must derive from Node
+  // (unless Node is defined as void).  Impl must also implement function with
+  // all of the same names as the virtual functions in GraphBuilderInterface
+  // -- including the ones with default implementations -- but with the
+  // prototypes changed to accept an explicit Node*, Sequence*, or Map* where
+  // appropriate.
+  template <class Impl>
+  class GraphBuilder : public GraphBuilderInterface
+  {
+  public:
+    typedef typename Impl::Node Node;
+    typedef typename Impl::Sequence Sequence;
+    typedef typename Impl::Map Map;
+    
+    GraphBuilder(Impl& impl) : m_impl(impl)
+    {
+      Map* pMap = NULL;
+      Sequence* pSeq = NULL;
+      Node* pNode = NULL;
+      
+      // Type consistency checks
+      pNode = pMap;
+      pNode = pSeq;
+    }
+    
+    GraphBuilderInterface& AsBuilderInterface() {return *this;}
+    
+    virtual void *NewNull(const std::string& tag, void* pParentNode) {
+      return CheckType<Node>(m_impl.NewNull(tag, AsNode(pParentNode)));
+    }
+    
+    virtual void *NewScalar(const Mark& mark, const std::string& tag, void *pParentNode, const std::string& value) {
+      return CheckType<Node>(m_impl.NewScalar(mark, tag, AsNode(pParentNode), value));
+    }
+    
+    virtual void *NewSequence(const Mark& mark, const std::string& tag, void *pParentNode) {
+      return CheckType<Sequence>(m_impl.NewSequence(mark, tag, AsNode(pParentNode)));
+    }
+    virtual void AppendToSequence(void *pSequence, void *pNode) {
+      m_impl.AppendToSequence(AsSequence(pSequence), AsNode(pNode));
+    }
+    virtual void SequenceComplete(void *pSequence) {
+      m_impl.SequenceComplete(AsSequence(pSequence));
+    }
+    
+    virtual void *NewMap(const Mark& mark, const std::string& tag, void *pParentNode) {
+      return CheckType<Map>(m_impl.NewMap(mark, tag, AsNode(pParentNode)));
+    }
+    virtual void AssignInMap(void *pMap, void *pKeyNode, void *pValueNode) {
+      m_impl.AssignInMap(AsMap(pMap), AsNode(pKeyNode), AsNode(pValueNode));
+    }
+    virtual void MapComplete(void *pMap) {
+      m_impl.MapComplete(AsMap(pMap));
+    }
+    
+    virtual void *AnchorReference(const Mark& mark, void *pNode) {
+      return CheckType<Node>(m_impl.AnchorReference(mark, AsNode(pNode)));
+    }
+  
+  private:
+    Impl& m_impl;
+    
+    // Static check for pointer to T
+    template <class T, class U>
+    static T* CheckType(U* p) {return p;}
+    
+    static Node *AsNode(void *pNode) {return static_cast<Node*>(pNode);}
+    static Sequence *AsSequence(void *pSeq) {return static_cast<Sequence*>(pSeq);}
+    static Map *AsMap(void *pMap) {return static_cast<Map*>(pMap);}
+  };
+}
+
+#endif // GRAPHBUILDER_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/node.h

@@ -17,10 +17,12 @@
 
 namespace YAML
 {
+	class AliasManager;
 	class Content;
 	class Scanner;
 	class Emitter;
-	struct ParserState;
+	class EventHandler;
+	struct NodeProperties;
 
 	enum CONTENT_TYPE { CT_NONE, CT_SCALAR, CT_SEQUENCE, CT_MAP };
 
@@ -32,7 +34,16 @@ namespace YAML
 
 		void Clear();
 		std::auto_ptr<Node> Clone() const;
-		void Parse(Scanner *pScanner, ParserState& state);
+		void EmitEvents(EventHandler& eventHandler) const;
+		void EmitEvents(AliasManager& am, EventHandler& eventHandler) const;
+
+		void Init(CONTENT_TYPE type, const Mark& mark, const std::string& tag);
+		void InitNull(const std::string& tag);
+		void InitAlias(const Mark& mark, const Node& identity);
+		
+		void SetData(const std::string& data);
+		void Append(std::auto_ptr<Node> pNode);
+		void Insert(std::auto_ptr<Node> pKey, std::auto_ptr<Node> pValue);
 
 		CONTENT_TYPE GetType() const;
 
@@ -97,19 +108,10 @@ namespace YAML
 
 		template <typename T>
 		const Node *FindValueForKey(const T& key) const;
-		
-		// helper for cloning
-		Node(const Mark& mark, const std::string& anchor, const std::string& tag, const Content *pContent);
-
-		// helpers for parsing
-		void ParseHeader(Scanner *pScanner, ParserState& state);
-		void ParseTag(Scanner *pScanner, ParserState& state);
-		void ParseAnchor(Scanner *pScanner, ParserState& state);
-		void ParseAlias(Scanner *pScanner, ParserState& state);
 
 	private:
 		Mark m_mark;
-		std::string m_anchor, m_tag;
+		std::string m_tag;
 		Content *m_pContent;
 		bool m_alias;
 		const Node *m_pIdentity;

include/nodeproperties.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#ifndef NODEPROPERTIES_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+#define NODEPROPERTIES_H_62B23520_7C8E_11DE_8A39_0800200C9A66
+
+namespace YAML
+{
+	struct NodeProperties {
+		std::string tag;
+		std::string anchor;
+	};
+}
+
+#endif // NODEPROPERTIES_H_62B23520_7C8E_11DE_8A39_0800200C9A66

include/parser.h

@@ -4,19 +4,20 @@
 #define PARSER_H_62B23520_7C8E_11DE_8A39_0800200C9A66
 
 
-#include "node.h"
+#include "graphbuilder.h"
 #include "noncopyable.h"
 #include <ios>
-#include <string>
-#include <vector>
-#include <map>
 #include <memory>
 
 namespace YAML
 {
-	class Scanner;
-	struct ParserState;
+	struct Directives;
+	struct Mark;
 	struct Token;
+	class EventHandler;
+	class GraphBuilderInterface;
+	class Node;
+	class Scanner;
 
 	class Parser: private noncopyable
 	{
@@ -28,6 +29,18 @@ namespace YAML
 		operator bool() const;
 
 		void Load(std::istream& in);
+		bool HandleNextDocument(EventHandler& eventHandler);
+		
+		void *BuildNextDocumentGraph(GraphBuilderInterface& graphBuilder);
+		template <class Builder>
+		typename Builder::Node *BuildNextDocumentGraph(Builder& graphBuilder)
+		{
+			GraphBuilder<Builder> wrapper(graphBuilder); // Must be lvalue to make C++ happy
+			return static_cast<typename Builder::Node *>(
+				BuildNextDocumentGraph(wrapper.AsBuilderInterface())
+			);
+		}
+		
 		bool GetNextDocument(Node& document);
 		void PrintTokens(std::ostream& out);
 
@@ -36,10 +49,10 @@ namespace YAML
 		void HandleDirective(const Token& token);
 		void HandleYamlDirective(const Token& token);
 		void HandleTagDirective(const Token& token);
-
+		
 	private:
 		std::auto_ptr<Scanner> m_pScanner;
-		std::auto_ptr<ParserState> m_pState;
+		std::auto_ptr<Directives> m_pDirectives;
 	};
 }