Implemented begin/end doc

include/yaml-cpp/emitter.h

@@ -81,8 +81,6 @@ namespace YAML
 		void EmitEndSeq();
 		void EmitBeginMap();
 		void EmitEndMap();
-		void EmitKey();
-		void EmitValue();
 		void EmitNewline();
 		void EmitKindTag();
 		void EmitTag(bool verbatim, const _Tag& tag);

src/emitter.cpp

@@ -131,10 +131,8 @@ namespace YAML
 				EmitEndMap();
 				break;
 			case Key:
-				EmitKey();
-				break;
 			case Value:
-				EmitValue();
+                // deprecated (these can be deduced by the parity of nodes in a map)
 				break;
 			case TagByKind:
 				EmitKindTag();
@@ -169,6 +167,20 @@ namespace YAML
 	{
 		if(!good())
 			return;
+        
+        if(m_pState->CurGroupType() != GroupType::None) {
+			m_pState->SetError("Unexpected begin document");
+			return;
+        }
+        
+        if(m_pState->HasAnchor() || m_pState->HasTag()) {
+			m_pState->SetError("Unexpected begin document");
+			return;
+        }
+        
+        if(m_stream.col() > 0)
+            m_stream << "\n";
+        m_stream << "---\n";
 	}
 	
 	// EmitEndDoc
@@ -176,6 +188,20 @@ namespace YAML
 	{
 		if(!good())
 			return;
+        
+        if(m_pState->CurGroupType() != GroupType::None) {
+			m_pState->SetError("Unexpected begin document");
+			return;
+        }
+        
+        if(m_pState->HasAnchor() || m_pState->HasTag()) {
+			m_pState->SetError("Unexpected begin document");
+			return;
+        }
+        
+        if(m_stream.col() > 0)
+            m_stream << "\n";
+        m_stream << "...\n";
 	}
 
 	// EmitBeginSeq
@@ -183,6 +209,8 @@ namespace YAML
 	{
 		if(!good())
 			return;
+        
+        m_pState->BeginGroup(GroupType::Seq);
 	}
 	
 	// EmitEndSeq
@@ -190,6 +218,8 @@ namespace YAML
 	{
 		if(!good())
 			return;
+        
+        m_pState->EndGroup(GroupType::Seq);
 	}
 	
 	// EmitBeginMap
@@ -197,26 +227,17 @@ namespace YAML
 	{
 		if(!good())
 			return;
+
+        m_pState->BeginGroup(GroupType::Map);
 	}
 	
 	// EmitEndMap
 	void Emitter::EmitEndMap()
-	{
-		if(!good())
-			return;	}
-	
-	// EmitKey
-	void Emitter::EmitKey()
 	{
 		if(!good())
 			return;
-	}
 
-	// EmitValue
-	void Emitter::EmitValue()
-	{
-		if(!good())
-			return;
+        m_pState->EndGroup(GroupType::Map);
     }
 
 	// EmitNewline
@@ -238,6 +259,9 @@ namespace YAML
 	{
 		if(!good())
 			return *this;
+        
+        m_pState->BeginScalar();
+        
 		return *this;
 	}
 
@@ -291,6 +315,8 @@ namespace YAML
 		if(!good())
 			return *this;
 
+        m_pState->BeginScalar();
+
 		return *this;
 	}
 
@@ -299,6 +325,8 @@ namespace YAML
 		if(!good())
 			return *this;
 
+        m_pState->BeginScalar();
+
 		return *this;
 	}
 
@@ -307,6 +335,8 @@ namespace YAML
 		if(!good())
 			return *this;
 
+        m_pState->BeginScalar();
+
 		return *this;
 	}
 	
@@ -315,6 +345,8 @@ namespace YAML
 		if(!good())
 			return *this;
 
+        m_pState->BeginScalar();
+
 		return *this;
 	}
 	
@@ -323,6 +355,7 @@ namespace YAML
 		if(!good())
 			return *this;
 
+        m_pState->BeginScalar();
         
 		return *this;
 	}
@@ -337,6 +370,8 @@ namespace YAML
 		if(!good())
 			return *this;
 
+        m_pState->BeginScalar();
+
 		return *this;
 	}
 
@@ -345,6 +380,8 @@ namespace YAML
 		if(!good())
 			return *this;
 
+        m_pState->BeginScalar();
+
 		return *this;
 	}
 
@@ -355,6 +392,8 @@ namespace YAML
 		if(!good())
 			return *this;
 
+        m_pState->BeginScalar();
+
 		return *this;
 	}
 }

src/emitterstate.cpp

@@ -4,7 +4,7 @@
 
 namespace YAML
 {
-	EmitterState::EmitterState(): m_isGood(true), m_curIndent(0)
+	EmitterState::EmitterState(): m_isGood(true), m_curIndent(0), m_hasAnchor(false), m_hasTag(false)
 	{
 		// set default global manipulators
 		m_charset.set(EmitNonAscii);
@@ -43,8 +43,24 @@ namespace YAML
 		SetMapKeyFormat(value, FmtScope::Local);
 	}
 	
+    void EmitterState::BeginNode()
+    {
+        if(!m_groups.empty())
+            m_groups.top().childCount++;
+        
+        m_hasAnchor = false;
+        m_hasTag = false;
+    }
+
+    void EmitterState::BeginScalar()
+    {
+        BeginNode();
+    }
+
 	void EmitterState::BeginGroup(GroupType::value type)
 	{
+        BeginNode();
+
 		unsigned lastIndent = (m_groups.empty() ? 0 : m_groups.top().indent);
 		m_curIndent += lastIndent;
 		
@@ -82,7 +98,7 @@ namespace YAML
 		m_globalModifiedSettings.restore();
 	}
 		
-	GroupType::value EmitterState::GetCurGroupType() const
+	GroupType::value EmitterState::CurGroupType() const
 	{
 		if(m_groups.empty())
 			return GroupType::None;
@@ -90,7 +106,7 @@ namespace YAML
 		return m_groups.top().type;
 	}
 	
-    FlowType::value EmitterState::GetCurGroupFlowType() const
+    FlowType::value EmitterState::CurGroupFlowType() const
 	{
 		if(m_groups.empty())
 			return FlowType::None;
@@ -222,8 +238,7 @@ namespace YAML
 	EMITTER_MANIP EmitterState::GetFlowType(GroupType::value groupType) const
 	{
 		// force flow style if we're currently in a flow
-        FlowType::value flowType = GetCurGroupFlowType();
-		if(flowType == FlowType::Flow)
+		if(CurGroupFlowType() == FlowType::Flow)
 			return Flow;
 		
 		// otherwise, go with what's asked of us

src/emitterstate.h

@@ -13,6 +13,7 @@
 #include <vector>
 #include <stack>
 #include <memory>
+#include <stdexcept>
 
 namespace YAML
 {
@@ -29,15 +30,18 @@ namespace YAML
 		// basic state checking
 		bool good() const { return m_isGood; }
 		const std::string GetLastError() const { return m_lastError; }
-		void SetError(const std::string& error) { m_isGood = false; m_lastError = error; }
+		void SetError(const std::string& error) { throw std::runtime_error(error); m_isGood = false; m_lastError = error; }
 		
-		// group handling
+		// node handling
+        void BeginScalar();
 		void BeginGroup(GroupType::value type);
 		void EndGroup(GroupType::value type);
 		
-		GroupType::value GetCurGroupType() const;
-        FlowType::value GetCurGroupFlowType() const;
-		int GetCurIndent() const { return m_curIndent; }
+		GroupType::value CurGroupType() const;
+        FlowType::value CurGroupFlowType() const;
+		int CurIndent() const { return m_curIndent; }
+        bool HasAnchor() const { return m_hasAnchor; }
+        bool HasTag() const { return m_hasTag; }
 
 		void ClearModifiedSettings();
 
@@ -85,6 +89,8 @@ namespace YAML
 		template <typename T>
 		void _Set(Setting<T>& fmt, T value, FmtScope::value scope);
         
+        void BeginNode();
+		
 	private:
 		// basic state ok?
 		bool m_isGood;
@@ -109,17 +115,20 @@ namespace YAML
 		SettingChanges m_globalModifiedSettings;
 		
 		struct Group {
-			Group(GroupType::value type_): type(type_), indent(0) {}
+			explicit Group(GroupType::value type_): type(type_), indent(0), childCount(0) {}
 			
             GroupType::value type;
 			EMITTER_MANIP flow;
 			int indent;
+            std::size_t childCount;
 			
 			SettingChanges modifiedSettings;
 		};
 
 		ptr_stack<Group> m_groups;
 		unsigned m_curIndent;
+        bool m_hasAnchor;
+        bool m_hasTag;
 	};
 
 	template <typename T>

util/sandbox.cpp

@@ -4,14 +4,11 @@
 int main()
 {
     YAML::Emitter out;
+    out << YAML::BeginDoc;
     out << YAML::BeginSeq;
     out << "foo";
-    out << YAML::Comment("Skills");
-    out << YAML::BeginMap;
-    out << YAML::Key << "attack" << YAML::Value << 23;
-    out << YAML::Key << "intelligence" << YAML::Value << 56;
-    out << YAML::EndMap;
     out << YAML::EndSeq;
+    out << YAML::EndDoc;
     
     std::cout << out.c_str() << "\n";
     return 0;