Temporary Capture stream

capturestream.cpp

class CaptureStream {
private:
	std::basic_ios<char>& m_stream;
	std::streambuf* m_orig_streambuf;
	std::stringstream m_buffer;

	CaptureStream(CaptureStream const&) = delete;
	CaptureStream& operator=(CaptureStream const&) = delete;
public:
	CaptureStream(std::basic_ios<char>& stream) :
			m_stream(stream),
			m_orig_streambuf(stream.rdbuf())
	{
		// Set new streambuf for stream
		stream.rdbuf(m_buffer.rdbuf());
	}
	~CaptureStream()
	{
		// Restore old streambuf for stream
		m_stream.rdbuf(m_orig_streambuf);
		m_orig_streambuf = nullptr;
	}
};