Clarified some copy/assignment issues with the stream/streamcharsource.

src/stream.h

 #pragma once
 
+#include "noncopyable.h"
 #include <deque>
 #include <ios>
 #include <string>
@@ -10,7 +11,7 @@ namespace YAML
 {
 	static const size_t MAX_PARSER_PUSHBACK = 8;
 
-	class Stream
+	class Stream: private noncopyable
 	{
 	public:
 		friend class StreamCharSource;

src/streamcharsource.h

 #pragma once
 
+#include "noncopyable.h"
 #include <cstddef>
 
 namespace YAML
@@ -7,7 +8,8 @@ namespace YAML
 	class StreamCharSource
 	{
 	public:
-		StreamCharSource(const Stream& stream);
+		StreamCharSource(const Stream& stream): m_offset(0), m_stream(stream) {}
+		StreamCharSource(const StreamCharSource& source): m_offset(source.m_offset), m_stream(source.m_stream) {}
 		~StreamCharSource() {}
 
 		operator bool() const;
@@ -19,10 +21,9 @@ namespace YAML
 	private:
 		std::size_t m_offset;
 		const Stream& m_stream;
-	};
 
-	inline StreamCharSource::StreamCharSource(const Stream& stream): m_offset(0), m_stream(stream) {
-	}
+		StreamCharSource& operator = (const StreamCharSource&); // non-assignable
+	};
 	
 	inline StreamCharSource::operator bool() const {
 		return m_stream.ReadAheadTo(m_offset);