pch migration to modules [wip]

simcore/simcore-fwd.cppm

@@ -0,0 +1,45 @@
+/*
+This Source Code Form is subject to the
+terms of the Mozilla Public License, v.
+2.0. If a copy of the MPL was not
+distributed with this file, You can
+obtain one at
+http://mozilla.org/MPL/2.0/.
+*/
+
+// Declarations shared by the simulation core partitions.
+//
+// These types point at each other -- a vehicle has a driver, a driver has a
+// vehicle, a track carries events -- so they cannot live in separate modules: a
+// forward declaration may not cross a module boundary. Inside one module it works
+// as it always did, which is what this partition is for. It is the old
+// utilities/Classes.h, except the declarations now attach to the same module as
+// the definitions.
+
+export module eu07.simcore:fwd;
+
+export {
+
+class TDynamicObject;
+class TController;
+class TTrack;
+class TTraction;
+class TMoverParameters;
+class TMemCell;
+class TEventLauncher;
+class TModel3d;
+class TSubModel;
+class TAnimModel;
+class TAnimContainer;
+class basic_event;
+class editor_ui;
+
+namespace scene {
+class basic_node;
+class shape_node;
+class basic_cell;
+class basic_section;
+class basic_region;
+}
+
+}  // export