Method get

src/App/Expression.cpp:745–783

}

Py::Object Expression::Component::get(const Expression *owner, const Py::Object &pyobj) const {
    try {
        if(!e1 && !e2 && !e3)
            return comp.get(pyobj);
        if(!comp.isRange() && !e2 && !e3) {
            auto index = e1->getPyValue();
            Py::Object res;
            if(pyobj.isMapping())
                res = Py::Mapping(pyobj).getItem(index);
            else {
                Py_ssize_t i = PyNumber_AsSsize_t(index.ptr(), PyExc_IndexError);
                if(PyErr_Occurred())
                    throw Py::Exception();
                res = Py::Sequence(pyobj).getItem(i);
            }
            if(!res.ptr())
                throw Py::Exception();
            return res;
        }else{
            Py::Object v1,v2,v3;
            if(e1) v1 = e1->getPyValue();
            if(e2) v2 = e2->getPyValue();
            if(e3) v3 = e3->getPyValue();
            PyObject *s = PySlice_New(e1?v1.ptr():nullptr,
                                      e2?v2.ptr():nullptr,
                                      e3?v3.ptr():nullptr);
            if(!s)
                throw Py::Exception();
            Py::Object slice(s,true);
            PyObject *res = PyObject_GetItem(pyobj.ptr(),slice.ptr());
            if(!res)
                throw Py::Exception();
            return Py::asObject(res);
        }
    }catch(Py::Exception &) {
        EXPR_PY_THROW(owner);
    }
    return Py::Object();
}

void Expression::Component::set(const Expression *owner, Py::Object &pyobj, const Py::Object &value) const
{