Support multiple volumes in a discretization collection

Author: inducer

doc/conf.py

@@ -40,6 +40,7 @@ def get_version():
     "https://documen.tician.de/arraycontext/": None,
     "https://documen.tician.de/meshmode/": None,
     "https://documen.tician.de/loopy/": None,
+    "https://mpi4py.readthedocs.io/en/stable": None,
     }
 
 # index-page demo uses pyopencl via plot_directive

grudge/__init__.py

@@ -23,8 +23,9 @@
 import grudge.symbolic as sym
 from grudge.execution import bind
 
-from grudge.discretization import DiscretizationCollection
+from grudge.discretization import (
+        DiscretizationCollection, make_discretization_collection)
 
 __all__ = [
-    "sym", "bind", "DiscretizationCollection"
+    "sym", "bind", "DiscretizationCollection", "make_discretization_collection"
 ]