provide API to access the language code for the concrete language

src/runtime/python/pypgf.c

@@ -1654,6 +1654,12 @@ Concr_getName(ConcrObject *self, void *closure)
     return gu2py_string(pgf_concrete_name(self->concr));
 }
 
+static PyObject*
+Concr_getLanguageCode(ConcrObject *self, void *closure)
+{
+    return gu2py_string(pgf_language_code(self->concr));
+}
+
 static PyObject*
 Concr_graphvizParseTree(ConcrObject* self, PyObject *args) {
 	ExprObject* pyexpr;
@@ -1683,6 +1689,10 @@ static PyGetSetDef Concr_getseters[] = {
      (getter)Concr_getName, NULL,
      "the name of the concrete syntax",
     },
+    {"languageCode", 
+     (getter)Concr_getLanguageCode, NULL,
+     "the language code for this concrete syntax",
+    },
     {NULL}  /* Sentinel */
 };