Fixed doc start/end

src/emitter.cpp

@@ -181,6 +181,8 @@ namespace YAML
         if(m_stream.col() > 0)
             m_stream << "\n";
         m_stream << "---\n";
+        
+        m_pState->StartedDoc();
 	}
 	
 	// EmitEndDoc
@@ -313,7 +315,7 @@ namespace YAML
     
     void Emitter::PrepareTopNode(EmitterNodeType::value child)
     {
-        if(m_pState->CurGroupChildCount() > 0 && m_stream.pos() > 0) {
+        if(m_pState->CurGroupChildCount() > 0 && m_stream.col() > 0) {
             if(child != EmitterNodeType::None)
                 EmitBeginDoc();
         }

src/emitterstate.cpp

@@ -111,6 +111,20 @@ namespace YAML
         return EmitterNodeType::None;
     }
     
+    void EmitterState::StartedDoc()
+    {
+        m_hasAnchor = false;
+        m_hasTag = false;
+        m_hasNonContent = false;
+    }
+    
+    void EmitterState::EndedDoc()
+    {
+        m_hasAnchor = false;
+        m_hasTag = false;
+        m_hasNonContent = false;
+    }
+
     void EmitterState::StartedScalar()
     {
         StartedNode();

src/emitterstate.h

@@ -39,6 +39,8 @@ namespace YAML
         void SetNonContent();
         void SetLongKey();
         void ForceFlow();
+        void StartedDoc();
+        void EndedDoc();
         void StartedScalar();
 		void StartedGroup(GroupType::value type);
 		void EndedGroup(GroupType::value type);