Returning a (NULL) boost_shared_ptr

[John E]

I'm building a program which defines this function:-

boost::shared_ptr<SysEx>
MidiRegionView::find_canvas_sys_ex (MidiModel::SysExPtr s)
{
	// Some stuff to return a valid object

	// Or if that's not possible...
	return NULL;
}

Presumably some compilers accept the above and return a boost::shared_ptr<SysEx> that's equivalent to a NULL pointer. However, MSVC tells me that it can't convert an int to boost::shared_ptr<SysEx>. I changed the return value to look like this:-

boost::shared_ptr<SysEx>
MidiRegionView::find_canvas_sys_ex (MidiModel::SysExPtr s)
{
	// Some stuff to return a valid object

	// Or if that's not possible...
	return boost::shared_ptr<SysEx>();
}

The compiler seems happy now - but is that the right way to return something that's equivalent to a NULL pointer?