If a Shell function retuns Id, wrap it in a MooseVec. The current API

has this behaviour.

pybind11/MooseVec.cpp

@@ -34,6 +34,10 @@ MooseVec::MooseVec(const ObjId& oid) : oid_(oid), path_(oid.path())
 {
 }
 
+MooseVec::MooseVec(const Id& id) : oid_(ObjId(id)), path_(id.path())
+{
+}
+
 const string MooseVec::dtype() const
 {
     return oid_.element()->cinfo()->name();

pybind11/MooseVec.h

@@ -10,11 +10,14 @@
 #ifndef MOOSE_VEC_H
 #define MOOSE_VEC_H
 
-class MooseVec {
+class MooseVec 
+{
 
 public:
     MooseVec(const string& path, unsigned int n, const string& dtype);
 
+    MooseVec(const Id& id);
+
     MooseVec(const ObjId& oid);
 
     const ObjId& obj() const;

pybind11/helper.cpp

@@ -22,6 +22,8 @@
 #include "../external/pybind11/include/pybind11/pybind11.h"
 #include "../external/pybind11/include/pybind11/stl.h"
 
+namespace py = pybind11;
+
 // See
 // https://pybind11.readthedocs.io/en/stable/advanced/cast/stl.html#binding-stl-containers
 // #include "../external/pybind11/include/pybind11/stl_bind.h"
@@ -44,8 +46,6 @@
 
 using namespace std;
 
-namespace py = pybind11;
-
 using namespace std;
 
 Id initShell(void)
@@ -138,14 +138,12 @@ ObjId createIdFromPath(string path, string type, unsigned int numData)
     return nId;
 }
 
-
 bool mooseExists(const string& p)
 {
     string path = moose::normalizePath(p);
     return Id(path) != Id() || path == "/" || path == "/root";
 }
 
-
 ObjId loadModelInternal(const string& fname, const string& modelpath,
                         const string& solverclass = "")
 {
@@ -215,7 +213,6 @@ void mooseMoveObjId(const ObjId& a, const ObjId& b)
     getShellPtr()->doMove(a.id, b);
 }
 
-
 void mooseSetClock(const unsigned int clockId, double dt)
 {
     getShellPtr()->doSetClock(clockId, dt);
@@ -243,10 +240,9 @@ py::object mooseGetCwe()
     return py::cast(mooseGetCweId());
 }
 
-
 void mooseSetCwe(const py::object& arg)
 {
-    if(py::isinstance<py::str>(arg))
+    if (py::isinstance<py::str>(arg))
         return getShellPtr()->setCwe(ObjId(arg.cast<string>()));
     return getShellPtr()->setCwe(arg.cast<ObjId>());
 }
@@ -319,13 +315,14 @@ void mooseStop()
     getShellPtr()->doStop();
 }
 
-ObjId mooseCopy(const py::object& elem, ObjId newParent, string newName,
-                unsigned int n = 1, bool toGlobal = false,
-                bool copyExtMsgs = false)
+// Id is synonym with Id in previous binding.
+MooseVec mooseCopy(const py::object& elem, ObjId newParent, string newName,
+                   unsigned int n = 1, bool toGlobal = false,
+                   bool copyExtMsgs = false)
 {
     Id orig = py::cast<Id>(elem);
-    return ObjId(getShellPtr()->doCopy(orig, newParent, newName, n, toGlobal,
-                                       copyExtMsgs));
+    return MooseVec(getShellPtr()->doCopy(orig, newParent, newName, n, toGlobal,
+                                          copyExtMsgs));
 }
 
 /**

pybind11/helper.h

@@ -19,6 +19,8 @@
 
 #include "../shell/Shell.h"
 
+#include "MooseVec.h"
+
 namespace py = pybind11;
 using namespace std;
 
@@ -134,7 +136,7 @@ inline bool mooseDeleteStr(const string& path)
 ObjId mooseCreate(const string type, const string& path,
                   unsigned int numdata = 1);
 
-ObjId mooseCopy(const py::object& orig, ObjId newParent, string newName,
+MooseVec mooseCopy(const py::object& orig, ObjId newParent, string newName,
                 unsigned int n, bool toGlobal, bool copyExtMsgs);
 
 

pybind11/pymoose.cpp

@@ -178,6 +178,8 @@ PYBIND11_MODULE(_moose, m)
         .def("__getitem__", &__Finfo__::getItem)
         .def("__setitem__", &__Finfo__::setItem);
 
+    // A thin wrapper around Id from ../basecode/Id.h . Usually this is shows
+    // at moose.vec.
     py::class_<Id>(m, "_Id")
         .def(py::init<>())
         .def(py::init<unsigned int>())