namespace Srf
{
-using namespace std;
-using namespace std::placeholders;
+using std::move;
+using std::placeholders::_1;
+using std::placeholders::_2;
+using std::runtime_error;
+using std::shared_ptr;
+using std::static_pointer_cast;
#ifdef HAVE_LIBSIGROKCXX
void LegacyCaptureDevice::class_init(Gst::ElementClass<LegacyCaptureDevice> *klass)