__ref__,__deref__ handling

[KrisThielemans]

swig/Lib/swig.swg

Lines 426 to 428 in cd3f6c5

	%rename(__deref__) *::operator->;
	%rename(__ref__) *::operator*();
	%rename(__ref__) *::operator*() const;

needs to be changed for MATLAB, as it doesn't allow functions starting with _. This creates an error in the test-suite

ERROR: Error: File: /home/kthielem/devel/build/swig/Examples/test-suite/matlab/+smart_pointer_member/Bar.m Line: 17 Column: 26
Invalid text character. Check for unsupported symbol, invisible character, or pasting of non-ASCII characters.
   smart_pointer_member failed

That seems trivial, but then the question is what to do with them... Octave has

swig/Lib/octave/octtypemaps.swg

Lines 80 to 90 in cd3f6c5

	%typemap(ret) const SWIGTYPE & SMARTPOINTER, SWIGTYPE SMARTPOINTER {
	octave_swig_type* lobj=Swig::swig_value_deref($result);
	if (lobj) {
	std::list<octave_value_list> idx;
	idx.push_back(octave_value("__deref__"));
	idx.push_back(octave_value_list());
	octave_value_list ovl(lobj->subsref(".(",idx));
	octave_swig_type* robj=ovl.length()>=1?Swig::swig_value_deref(ovl(0)):0;
	if (robj && !error_state)
	lobj->append(robj);
	}

which might be related? Maybe not as this is stuff with SMARTPOINTER, which we currently don't have in the Matlab module.