Commit: 1d7bdbd273abdb6f606fac0a651986166cee62a4
Author: Dalai Felinto
Date:   Wed Apr 25 12:35:36 2018 +0200
Branches: blender2.8
https://developer.blender.org/rB1d7bdbd273abdb6f606fac0a651986166cee62a4

Edit Mesh: multi-object extrude_region

Technically this is the following operator:
bpy.ops.view3d.edit_mesh_extrude_move_normal

But this is a Python operator that in turns calls:
MESH_OT_extrude_region_move

Which in turns calls:
* MESH_OT_extrude_region
* TRANSFORM_OT_translate

===================================================================

M       source/blender/editors/mesh/editmesh_extrude.c

===================================================================

diff --git a/source/blender/editors/mesh/editmesh_extrude.c 
b/source/blender/editors/mesh/editmesh_extrude.c
index 2c60df9abe1..70fcfe8e4a5 100644
--- a/source/blender/editors/mesh/editmesh_extrude.c
+++ b/source/blender/editors/mesh/editmesh_extrude.c
@@ -405,18 +405,23 @@ static bool edbm_extrude_mesh(Object *obedit, BMEditMesh 
*em, wmOperator *op)
 /* extrude without transform */
 static int edbm_extrude_region_exec(bContext *C, wmOperator *op)
 {
-       Object *obedit = CTX_data_edit_object(C);
-       BMEditMesh *em = BKE_editmesh_from_object(obedit);
-
-       edbm_extrude_mesh(obedit, em, op);
+       ViewLayer *view_layer = CTX_data_view_layer(C);
+       uint objects_len = 0;
+       Object **objects = 
BKE_view_layer_array_from_objects_in_edit_mode_unique_data(view_layer, 
&objects_len);
+       for (uint ob_index = 0; ob_index < objects_len; ob_index++) {
+               Object *obedit = objects[ob_index];
+               BMEditMesh *em = BKE_editmesh_from_object(obedit);
 
-       /* This normally happens when pushing undo but modal operators
-        * like this one don't push undo data until after modal mode is
-        * done.*/
-       EDBM_mesh_normals_update(em);
+               edbm_extrude_mesh(obedit, em, op);
 
-       EDBM_update_generic(em, true, true);
+               /* This normally happens when pushing undo but modal operators
+                * like this one don't push undo data until after modal mode is
+                * done.*/
+               EDBM_mesh_normals_update(em);
 
+               EDBM_update_generic(em, true, true);
+       }
+       MEM_freeN(objects);
        return OPERATOR_FINISHED;
 }

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