Debug logging with STL stream operators

#include "debuglogger.h"

std::string log_to_file_ex::filename_ = "";

typedef std::basic_ostream<TCHAR> stream_type;

stream_type &operator<<(stream_type &log, const std::exception &text)
{
	log << text.what();
	return log;
}

class TestClass
{
public:
	TestClass(int intvalue, double doublevalue) : intvalue_(intvalue), doublevalue_(doublevalue)
	{
		
	}
	friend stream_type& operator<<(stream_type&, const TestClass &); 
private:
	int intvalue_;
	double doublevalue_;
};

stream_type& operator<<(stream_type&log, const TestClass &tc)
{
	log << _T("TestClass(") << tc.intvalue_ << _T(", ") << tc.doublevalue_ << _T(")");
	return log;
}

int main(int argc, TCHAR* argv[])
{
	try
	{
		TestClass tc(42, 0.815);
		CTXLOG(_T("main()")) << _T("Hello debug log! ") << tc << std::endl;
		CTXLOG(_T("main()")) << _T("Only a context message!\n");
		RAWLOG() << _T("Without a context!\n");

		FileDebugLogger().get() << "This is a simple file logger!" << std::endl;

		log_to_file_ex f;
		f.setFilename("d:\\temp\\debugex.log");

		FileDebugLoggerEx().get() << "This is a file logger!" << std::endl;
	}
	catch(std::exception &ex)
	{
		CTXLOG(_T("main()")) << _T("There is a serious problem! (") << ex << _T(")") << std::endl;
	}
	return 0;
}