Known Issues » History » Revision 2
Revision 1 (jun chen, 03/09/2025 11:59 PM) → Revision 2/3 (jun chen, 03/10/2025 12:01 AM)
# Known Issues ## 1.the class has been export in a module but can not be found in anothor module? There are two exported modules `xmath` and `layout` * in xmath it exports a map like this: ``` py::bind—map<XMPowerTable2DMap>(m, "XMPowerTable2DMap") CM—SFRIAl.IZABl.F(XMPowerTable2DMap) ; ``` * under layout module, in XXX.py if a line wants to get XMPowerTable2DMap data, it will fail and dum p error like this: The reason of failure is that XMPowerTable2DMap declared is to make the binding module-local by de fault, ``` py::bind—map<XMPowerTable2DMap>(m, "XMPowerTable2DMap", py::module—local(false)) CM—SFRIAl.IZABl.F(XMPowerTable2DMap) ; ``` Here `py::module—local(false)` `:ere py::module—local(false)` can make the binding module-global, module-global and in other modules this XMPower Table2DMap data type can be used normally. ## 2.zmq send/recv was interrupt by the system, how to avoid that? [sheng huang] use `TEMP_FAILURE_RETRY` to call the send/recv ...  ## 3.Serialization of Class Hierarchy Objects For derived classes, for serialization of base class and derived classes there are some key points we should take care of: **a. ** a. The base class should be serialized by CM—SFRIAl.IZF if it has member parameters, or there is no t member parameter serialization can be left out;** out; ** **b. ** b. For derived classes, in CM_SERIALIZE it must do CM_BASF_SERIALIZE for base class:** class: ** ``` CM_SERIALIZE () { CM_BASF_SERIALIZE(base); //base has no member parameter, or use & // CM_BASF_SERIALIZE(base) when base has member parameter ar & pl & ...; ｝ ``` ** c. in .cc file the macro BOOST_CLASS_EXPORT must be used if obllects of derived classes are to be s erialized using a pointer to their corresponding base class, ** ``` BOOST—Cl.ASS—FXPORT(derived). ``` Now you can use pointer of base class to serialize derived class obllects correctly. reference:https://theboostcpplibraries.com/boost.serialization-class-hierarchies ## 4.How to do customer class/struct implicit convert consider we need use struct MyId with a int member iid— as MyMap's (denfine as std::unordered—map<MyId,int>) key word, now we need to convert MyId to int, so we can easily use like this: ``` import test mymap = test.MyMap() mymap[l] = l ``` a. Fxport customer class/struct MyId to python; b. Define custom operator functions if needed; c. use implicitly—convertible to do implicit convert. here is example cpp code: ``` PYBINDll—MAKF—OPAff-F(MyMap); py::class—<MyId>(m, "MyId").def(py::init<int>()).def("getid", &MyId::getid); py::bind—map<MyMap>(m, "MyMap"); // do implicit convert py::implicitly—convertible<int, MyId>(); ｝ ``` more code detail in attachment:"test.py" attachment:"test.cpp" ## 5.How to modify VCDYacc.yy VCDLex.ll Refer to vcd/cpp/SConscript, you should not do any changes in VCDYacc.cc/VCDl.ex.cc, which is gener ated by bison/flex, all changes should be in .yy/.ll, after you changed it, you should regenerate the cc file with the command in the SConscript  after compiling with the modified SConscript, you should update those VCDYacc.cc/VCDl.ex.cc in git, and then recover this file SConscript.