MacOS(Python): SWIG 4.4.0 regression

[Mizux]

TLDR tracked in:

• swig-4.4.0 with PyMuPDF/MuPDF gives Director errors on MacOS only. swig/swig#3279

When migrating from SWIG 4.3.1 to 4.4.0 we got some issue on few tests...

cmake -S. -Bbuild -DBUILD_PYTHON=ON -DUSE_SCIP=OFF -DUSE_COINOR=OFF -DUSE_HIGHS=OFF && cmake --build build --config Release -j 4
(cd build && ctest -V -R "python.*issue46")

note: disable SCIP, Highs and Cbc support to reduce build time...

Observed:

...
677: TypeError: SWIG director type mismatch in output value of type 'operations_research::Decision *'

DevNote

src: https://github.com/google/or-tools/blob/main/examples/tests/issue46.py

or-tools/ortools/constraint_solver/python/constraint_solver.swig

Line 118 in fcc7f85

PY_CONVERT_HELPER_PTR(Decision);

or-tools/ortools/constraint_solver/python/constraint_solver.swig

Line 133 in fcc7f85

PY_CONVERT(Decision);

or-tools/ortools/constraint_solver/python/constraint_solver.swig

Line 1273 in fcc7f85

%feature ("director") Decision;

[Mizux]

or-tools/ortools/util/python/vector.swig

Lines 196 to 242 in fcc7f85

	// Helpers to convert vectors of operations_research::Class*
	// Note: this does not yet support sub-namespaces, as in
	// operations_research::linear_solver:Class.
	// We *do* need to use SWIGTYPE_... type names directly, because the
	// (recommended replacement) $descriptor macro fails, as of 2019-07, with
	// types such as operations_research::Solver.
	// The absence of whitespace before 'swiglint' is mandatory.
	//swiglint: disable swigtype-name
	// Conversion utilities, to be able to expose APIs that return a C++ object
	// pointer. The PyObjAs template must be able to deal with all such types.
	%define PY_CONVERT_HELPER_PTR(CType)
	%{
	template<>
	bool PyObjAs(PyObject *py_obj, operations_research::CType** b) {
	return SWIG_ConvertPtr(py_obj, reinterpret_cast<void**>(b),
	SWIGTYPE_p_operations_research__ ## CType,
	SWIG_POINTER_EXCEPTION) >= 0;
	}
	%}
	%enddef
	%define PY_CONVERT(Class)
	%{
	PyObject* FromObject ## Class(operations_research::Class* obj) {
	return SWIG_NewPointerObj(SWIG_as_voidptr(obj),
	SWIGTYPE_p_operations_research__ ## Class,
	0 | 0);
	}
	bool CanConvertTo ## Class(PyObject *py_obj) {
	operations_research::Class* tmp;
	return PyObjAs(py_obj, &tmp);
	}
	%}
	%typemap(in) operations_research::Class* const, operations_research::Class* {
	if (!PyObjAs($input, &$1)) SWIG_fail;
	}
	%typecheck(SWIG_TYPECHECK_POINTER) operations_research::Class* const, operations_research::Class* {
	$1 = CanConvertTo ## Class($input);
	if ($1 == 0) PyErr_Clear();
	}
	PY_LIST_INPUT_OUTPUT_TYPEMAP(operations_research::Class*,
	CanConvertTo ## Class,
	FromObject ## Class);
	%enddef