Consistently use pyref::string for temporary Python string creation

Author: Wentzell

c++/cpp2py/py_converter.hpp

@@ -103,7 +103,7 @@ namespace cpp2py {
       sptr = std::make_shared<conv_table_t>();
 
       // Now register the pointer in __main__
-      PyObject *mod = PyImport_GetModule(PyUnicode_FromString("__main__"));
+      PyObject *mod = PyImport_GetModule(pyref::string("__main__"));
       auto *p       = new std::shared_ptr<conv_table_t>{sptr};
       pyref c       = PyCapsule_New((void *)p, "__main__.__cpp2py_table", (PyCapsule_Destructor)_table_destructor);
       pyref s       = PyUnicode_FromString("__cpp2py_table");

c++/cpp2py/pyref.hpp

@@ -101,8 +101,7 @@ namespace cpp2py {
     /// Import the module and returns a pyref to it
     static pyref module(std::string const &module_name) {
       // Maybe the module was already imported?
-      pyref mod_name = PyUnicode_FromString(module_name.c_str());
-      PyObject *mod  = PyImport_GetModule(mod_name);
+      PyObject *mod  = PyImport_GetModule(pyref::string(module_name));
 
       // If not, import normally
       if (mod == nullptr) mod = PyImport_ImportModule(module_name.c_str());

cpp2py/mako/wrap.cxx

@@ -594,7 +594,7 @@ template <> struct py_converter<${en.c_name}> {
       PyErr_Fetch(&ptype, &err, &ptraceback);
       // catch here all non defined errors and print instead generic warning
       if (err == NULL) {
-        errors[${n_overload}] = pyref{PyUnicode_FromString("unkown error check converter")};
+        errors[${n_overload}] = pyref::string("unkown error check converter");
       } else {
         errors[${n_overload}] = pyref{err};
       }
@@ -1039,10 +1039,10 @@ PyObject* ${c.py_type}___iter__(PyObject *self) {
   static const char * ens = "${repr( [ (en.c_name_absolute, en.c_namespace, en.values) for en in module.enums] )}";
   static const char * inclu = "${repr( module.include_list)}";
 
-  PyDict_SetItemString(d, "classes", pyref(PyUnicode_FromString(cls)));
-  PyDict_SetItemString(d, "enums", pyref(PyUnicode_FromString(ens)));
-  PyDict_SetItemString(d, "module_name", pyref(PyUnicode_FromString("${module.full_name}")));
-  PyDict_SetItemString(d, "includes", pyref(PyUnicode_FromString(inclu)));
+  PyDict_SetItemString(d, "classes", pyref::string(cls));
+  PyDict_SetItemString(d, "enums", pyref::string(ens));
+  PyDict_SetItemString(d, "module_name", pyref::string("${module.full_name}"));
+  PyDict_SetItemString(d, "includes", pyref::string(inclu));
 
   return d;
  }