Cleanup: Add more const'ness to RNA API.

This commit makes PointerRNA passed to RNA path API const.
Main change was in the `path` callback for RNA structs, and indirectly
the `getlength` callback of properties.

49 files changed, 365 insertions, 327 deletions

diff --git a/source/blender/makesrna/RNA_access.h b/source/blender/makesrna/RNA_access.h
index e1e655fad4b..a389ce1d31b 100644
--- a/source/blender/makesrna/RNA_access.h
+++ b/source/blender/makesrna/RNA_access.h
@@ -177,7 +177,7 @@ int RNA_property_multi_array_length(PointerRNA *ptr, PropertyRNA *prop, int dime
 /**
  * Used by BPY to make an array from the python object.
  */
-int RNA_property_array_dimension(PointerRNA *ptr, PropertyRNA *prop, int length[]);
+int RNA_property_array_dimension(const PointerRNA *ptr, PropertyRNA *prop, int length[]);
 char RNA_property_array_item_char(PropertyRNA *prop, int index);
 int RNA_property_array_item_index(PropertyRNA *prop, char name);
 
@@ -402,7 +402,9 @@ int RNA_property_collection_length(PointerRNA *ptr, PropertyRNA *prop);
  * without having to iterate over items in the collection (needed for some kinds of collections).
  */
 bool RNA_property_collection_is_empty(PointerRNA *ptr, PropertyRNA *prop);
-int RNA_property_collection_lookup_index(PointerRNA *ptr, PropertyRNA *prop, PointerRNA *t_ptr);
+int RNA_property_collection_lookup_index(PointerRNA *ptr,
+                                         PropertyRNA *prop,
+                                         const PointerRNA *t_ptr);
 int RNA_property_collection_lookup_int(PointerRNA *ptr,
                                        PropertyRNA *prop,
                                        int key,
@@ -614,21 +616,23 @@ struct ID *RNA_find_real_ID_and_path(struct Main *bmain, struct ID *id, const ch
 
 char *RNA_path_from_ID_to_struct(const PointerRNA *ptr);
 
-char *RNA_path_from_real_ID_to_struct(struct Main *bmain, PointerRNA *ptr, struct ID **r_real);
+char *RNA_path_from_real_ID_to_struct(struct Main *bmain,
+                                      const PointerRNA *ptr,
+                                      struct ID **r_real);
 
-char *RNA_path_from_ID_to_property(PointerRNA *ptr, PropertyRNA *prop);
+char *RNA_path_from_ID_to_property(const PointerRNA *ptr, PropertyRNA *prop);
 /**
  * \param index_dim: The dimension to show, 0 disables. 1 for 1d array, 2 for 2d. etc.
  * \param index: The *flattened* index to use when \a `index_dim > 0`,
  * this is expanded when used with multi-dimensional arrays.
  */
-char *RNA_path_from_ID_to_property_index(PointerRNA *ptr,
+char *RNA_path_from_ID_to_property_index(const PointerRNA *ptr,
                                          PropertyRNA *prop,
                                          int index_dim,
                                          int index);
 
 char *RNA_path_from_real_ID_to_property_index(struct Main *bmain,
-                                              PointerRNA *ptr,
+                                              const PointerRNA *ptr,
                                               PropertyRNA *prop,
                                               int index_dim,
                                               int index,
@@ -638,8 +642,8 @@ char *RNA_path_from_real_ID_to_property_index(struct Main *bmain,
  * \return the path to given ptr/prop from the closest ancestor of given type,
  * if any (else return NULL).
  */
-char *RNA_path_resolve_from_type_to_property(struct PointerRNA *ptr,
-                                             struct PropertyRNA *prop,
+char *RNA_path_resolve_from_type_to_property(const PointerRNA *ptr,
+                                             PropertyRNA *prop,
                                              const struct StructRNA *type);
 
 /**
@@ -651,27 +655,27 @@ char *RNA_path_full_ID_py(struct Main *bmain, struct ID *id);
  * Get the ID.struct as a python representation, eg:
  *   bpy.data.foo["bar"].some_struct
  */
-char *RNA_path_full_struct_py(struct Main *bmain, struct PointerRNA *ptr);
+char *RNA_path_full_struct_py(struct Main *bmain, const PointerRNA *ptr);
 /**
  * Get the ID.struct.property as a python representation, eg:
  *   bpy.data.foo["bar"].some_struct.some_prop[10]
  */
 char *RNA_path_full_property_py_ex(
-    struct Main *bmain, PointerRNA *ptr, PropertyRNA *prop, int index, bool use_fallback);
+    struct Main *bmain, const PointerRNA *ptr, PropertyRNA *prop, int index, bool use_fallback);
 char *RNA_path_full_property_py(struct Main *bmain,
-                                struct PointerRNA *ptr,
-                                struct PropertyRNA *prop,
+                                const PointerRNA *ptr,
+                                PropertyRNA *prop,
                                 int index);
 /**
  * Get the struct.property as a python representation, eg:
  *   some_struct.some_prop[10]
  */
-char *RNA_path_struct_property_py(struct PointerRNA *ptr, struct PropertyRNA *prop, int index);
+char *RNA_path_struct_property_py(const PointerRNA *ptr, PropertyRNA *prop, int index);
 /**
  * Get the struct.property as a python representation, eg:
  *   some_prop[10]
  */
-char *RNA_path_property_py(const struct PointerRNA *ptr, struct PropertyRNA *prop, int index);
+char *RNA_path_property_py(const PointerRNA *ptr, PropertyRNA *prop, int index);
 
 /* Quick name based property access
  *
diff --git a/source/blender/makesrna/intern/rna_ID.c b/source/blender/makesrna/intern/rna_ID.c
index 6a3c0864331..b5cf8abaac6 100644
--- a/source/blender/makesrna/intern/rna_ID.c
+++ b/source/blender/makesrna/intern/rna_ID.c
@@ -1131,7 +1131,7 @@ static void rna_ImagePreview_size_set(PointerRNA *ptr, const int *values, enum e
   prv_img->flag[size] |= (PRV_CHANGED | PRV_USER_EDITED);
 }
 
-static int rna_ImagePreview_pixels_get_length(PointerRNA *ptr,
+static int rna_ImagePreview_pixels_get_length(const PointerRNA *ptr,
                                               int length[RNA_MAX_ARRAY_DIMENSION],
                                               enum eIconSizes size)
 {
@@ -1176,7 +1176,7 @@ static void rna_ImagePreview_pixels_set(PointerRNA *ptr, const int *values, enum
   prv_img->flag[size] |= PRV_USER_EDITED;
 }
 
-static int rna_ImagePreview_pixels_float_get_length(PointerRNA *ptr,
+static int rna_ImagePreview_pixels_float_get_length(const PointerRNA *ptr,
                                                     int length[RNA_MAX_ARRAY_DIMENSION],
                                                     enum eIconSizes size)
 {
@@ -1256,7 +1256,7 @@ static void rna_ImagePreview_image_size_set(PointerRNA *ptr, const int *values)
   rna_ImagePreview_size_set(ptr, values, ICON_SIZE_PREVIEW);
 }
 
-static int rna_ImagePreview_image_pixels_get_length(PointerRNA *ptr,
+static int rna_ImagePreview_image_pixels_get_length(const PointerRNA *ptr,
                                                     int length[RNA_MAX_ARRAY_DIMENSION])
 {
   return rna_ImagePreview_pixels_get_length(ptr, length, ICON_SIZE_PREVIEW);
@@ -1272,7 +1272,7 @@ static void rna_ImagePreview_image_pixels_set(PointerRNA *ptr, const int *values
   rna_ImagePreview_pixels_set(ptr, values, ICON_SIZE_PREVIEW);
 }
 
-static int rna_ImagePreview_image_pixels_float_get_length(PointerRNA *ptr,
+static int rna_ImagePreview_image_pixels_float_get_length(const PointerRNA *ptr,
                                                           int length[RNA_MAX_ARRAY_DIMENSION])
 {
   return rna_ImagePreview_pixels_float_get_length(ptr, length, ICON_SIZE_PREVIEW);
@@ -1303,7 +1303,7 @@ static void rna_ImagePreview_icon_size_set(PointerRNA *ptr, const int *values)
   rna_ImagePreview_size_set(ptr, values, ICON_SIZE_ICON);
 }
 
-static int rna_ImagePreview_icon_pixels_get_length(PointerRNA *ptr,
+static int rna_ImagePreview_icon_pixels_get_length(const PointerRNA *ptr,
                                                    int length[RNA_MAX_ARRAY_DIMENSION])
 {
   return rna_ImagePreview_pixels_get_length(ptr, length, ICON_SIZE_ICON);
@@ -1319,7 +1319,7 @@ static void rna_ImagePreview_icon_pixels_set(PointerRNA *ptr, const int *values)
   rna_ImagePreview_pixels_set(ptr, values, ICON_SIZE_ICON);
 }
 
-static int rna_ImagePreview_icon_pixels_float_get_length(PointerRNA *ptr,
+static int rna_ImagePreview_icon_pixels_float_get_length(const PointerRNA *ptr,
                                                          int length[RNA_MAX_ARRAY_DIMENSION])
 {
   return rna_ImagePreview_pixels_float_get_length(ptr, length, ICON_SIZE_ICON);
diff --git a/source/blender/makesrna/intern/rna_access.c b/source/blender/makesrna/intern/rna_access.c
index 53fa7a3d923..91e98cd6943 100644
--- a/source/blender/makesrna/intern/rna_access.c
+++ b/source/blender/makesrna/intern/rna_access.c
@@ -302,7 +302,8 @@ static int rna_ensure_property_array_length(PointerRNA *ptr, PropertyRNA *prop)
 {
   if (prop->magic == RNA_MAGIC) {
     int arraylen[RNA_MAX_ARRAY_DIMENSION];
-    return (prop->getlength && ptr->data) ? prop->getlength(ptr, arraylen) : prop->totarraylength;
+    return (prop->getlength && ptr->data) ? prop->getlength(ptr, arraylen) :
+                                            (int)prop->totarraylength;
   }
   IDProperty *idprop = (IDProperty *)prop;
 
@@ -322,7 +323,7 @@ static bool rna_ensure_property_array_check(PropertyRNA *prop)
   return (idprop->type == IDP_ARRAY);
 }
 
-static void rna_ensure_property_multi_array_length(PointerRNA *ptr,
+static void rna_ensure_property_multi_array_length(const PointerRNA *ptr,
                                                    PropertyRNA *prop,
                                                    int length[])
 {
@@ -1080,7 +1081,7 @@ bool RNA_property_array_check(PropertyRNA *prop)
   return rna_ensure_property_array_check(prop);
 }
 
-int RNA_property_array_dimension(PointerRNA *ptr, PropertyRNA *prop, int length[])
+int RNA_property_array_dimension(const PointerRNA *ptr, PropertyRNA *prop, int length[])
 {
   PropertyRNA *rprop = rna_ensure_property(prop);
 
@@ -4025,7 +4026,9 @@ void RNA_property_collection_clear(PointerRNA *ptr, PropertyRNA *prop)
   }
 }
 
-int RNA_property_collection_lookup_index(PointerRNA *ptr, PropertyRNA *prop, PointerRNA *t_ptr)
+int RNA_property_collection_lookup_index(PointerRNA *ptr,
+                                         PropertyRNA *prop,
+                                         const PointerRNA *t_ptr)
 {
   CollectionPropertyIterator iter;
   int index = 0;
@@ -5724,7 +5727,7 @@ char *RNA_path_from_ID_to_struct(const PointerRNA *ptr)
   return ptrpath;
 }
 
-char *RNA_path_from_real_ID_to_struct(Main *bmain, PointerRNA *ptr, struct ID **r_real)
+char *RNA_path_from_real_ID_to_struct(Main *bmain, const PointerRNA *ptr, struct ID **r_real)
 {
   char *path = RNA_path_from_ID_to_struct(ptr);
 
@@ -5753,7 +5756,7 @@ static void rna_path_array_multi_from_flat_index(const int dimsize[RNA_MAX_ARRAY
   BLI_assert(index == 0);
 }
 
-static void rna_path_array_multi_string_from_flat_index(PointerRNA *ptr,
+static void rna_path_array_multi_string_from_flat_index(const PointerRNA *ptr,
                                                         PropertyRNA *prop,
                                                         int index_dim,
                                                         int index,
@@ -5772,7 +5775,7 @@ static void rna_path_array_multi_string_from_flat_index(PointerRNA *ptr,
   }
 }
 
-char *RNA_path_from_ID_to_property_index(PointerRNA *ptr,
+char *RNA_path_from_ID_to_property_index(const PointerRNA *ptr,
                                          PropertyRNA *prop,
                                          int index_dim,
                                          int index)
@@ -5828,13 +5831,17 @@ char *RNA_path_from_ID_to_property_index(PointerRNA *ptr,
   return path;
 }
 
-char *RNA_path_from_ID_to_property(PointerRNA *ptr, PropertyRNA *prop)
+char *RNA_path_from_ID_to_property(const PointerRNA *ptr, PropertyRNA *prop)
 {
   return RNA_path_from_ID_to_property_index(ptr, prop, 0, -1);
 }
 
-char *RNA_path_from_real_ID_to_property_index(
-    Main *bmain, PointerRNA *ptr, PropertyRNA *prop, int index_dim, int index, ID **r_real_id)
+char *RNA_path_from_real_ID_to_property_index(Main *bmain,
+                                              const PointerRNA *ptr,
+                                              PropertyRNA *prop,
+                                              int index_dim,
+                                              int index,
+                                              ID **r_real_id)
 {
   char *path = RNA_path_from_ID_to_property_index(ptr, prop, index_dim, index);
 
@@ -5843,7 +5850,7 @@ char *RNA_path_from_real_ID_to_property_index(
   return path != NULL ? rna_prepend_real_ID_path(bmain, ptr->owner_id, path, r_real_id) : NULL;
 }
 
-char *RNA_path_resolve_from_type_to_property(PointerRNA *ptr,
+char *RNA_path_resolve_from_type_to_property(const PointerRNA *ptr,
                                              PropertyRNA *prop,
                                              const StructRNA *type)
 {
@@ -5916,7 +5923,7 @@ char *RNA_path_full_ID_py(Main *bmain, ID *id)
                       path);
 }
 
-char *RNA_path_full_struct_py(Main *bmain, struct PointerRNA *ptr)
+char *RNA_path_full_struct_py(Main *bmain, const PointerRNA *ptr)
 {
   char *id_path;
   char *data_path;
@@ -5945,7 +5952,7 @@ char *RNA_path_full_struct_py(Main *bmain, struct PointerRNA *ptr)
 }
 
 char *RNA_path_full_property_py_ex(
-    Main *bmain, PointerRNA *ptr, PropertyRNA *prop, int index, bool use_fallback)
+    Main *bmain, const PointerRNA *ptr, PropertyRNA *prop, int index, bool use_fallback)
 {
   char *id_path;
   const char *data_delim;
@@ -5992,12 +5999,12 @@ char *RNA_path_full_property_py_ex(
   return ret;
 }
 
-char *RNA_path_full_property_py(Main *bmain, PointerRNA *ptr, PropertyRNA *prop, int index)
+char *RNA_path_full_property_py(Main *bmain, const PointerRNA *ptr, PropertyRNA *prop, int index)
 {
   return RNA_path_full_property_py_ex(bmain, ptr, prop, index, false);
 }
 
-char *RNA_path_struct_property_py(PointerRNA *ptr, PropertyRNA *prop, int index)
+char *RNA_path_struct_property_py(const PointerRNA *ptr, PropertyRNA *prop, int index)
 {
   char *data_path;
 
diff --git a/source/blender/makesrna/intern/rna_action.c b/source/blender/makesrna/intern/rna_action.c
index 76d2087d904..a1266443631 100644
--- a/source/blender/makesrna/intern/rna_action.c
+++ b/source/blender/makesrna/intern/rna_action.c
@@ -340,7 +340,7 @@ bool rna_Action_actedit_assign_poll(PointerRNA *ptr, PointerRNA value)
   return 0;
 }
 
-static char *rna_DopeSheet_path(PointerRNA *UNUSED(ptr))
+static char *rna_DopeSheet_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("dopesheet");
 }
diff --git a/source/blender/makesrna/intern/rna_armature.c b/source/blender/makesrna/intern/rna_armature.c
index df92601dd0c..a4094630266 100644
--- a/source/blender/makesrna/intern/rna_armature.c
+++ b/source/blender/makesrna/intern/rna_armature.c
@@ -216,10 +216,10 @@ static void rna_Bone_select_update(Main *UNUSED(bmain), Scene *UNUSED(scene), Po
   WM_main_add_notifier(NC_ANIMATION | ND_ANIMCHAN, id);
 }
 
-static char *rna_Bone_path(PointerRNA *ptr)
+static char *rna_Bone_path(const PointerRNA *ptr)
 {
-  ID *id = ptr->owner_id;
-  Bone *bone = (Bone *)ptr->data;
+  const ID *id = ptr->owner_id;
+  const Bone *bone = (const Bone *)ptr->data;
   char name_esc[sizeof(bone->name) * 2];
 
   BLI_str_escape(name_esc, bone->name, sizeof(name_esc));
diff --git a/source/blender/makesrna/intern/rna_attribute.c b/source/blender/makesrna/intern/rna_attribute.c
index 2d9517ce1ee..36706c82366 100644
--- a/source/blender/makesrna/intern/rna_attribute.c
+++ b/source/blender/makesrna/intern/rna_attribute.c
@@ -118,9 +118,9 @@ const EnumPropertyItem rna_enum_color_attribute_domain_items[] = {
 
 /* Attribute */
 
-static char *rna_Attribute_path(PointerRNA *ptr)
+static char *rna_Attribute_path(const PointerRNA *ptr)
 {
-  CustomDataLayer *layer = ptr->data;
+  const CustomDataLayer *layer = ptr->data;
   return BLI_sprintfN("attributes['%s']", layer->name);
 }
 
diff --git a/source/blender/makesrna/intern/rna_boid.c b/source/blender/makesrna/intern/rna_boid.c
index 0818f009d1f..d65c8a1b4e3 100644
--- a/source/blender/makesrna/intern/rna_boid.c
+++ b/source/blender/makesrna/intern/rna_boid.c
@@ -162,9 +162,9 @@ static StructRNA *rna_BoidRule_refine(struct PointerRNA *ptr)
   }
 }
 
-static char *rna_BoidRule_path(PointerRNA *ptr)
+static char *rna_BoidRule_path(const PointerRNA *ptr)
 {
-  BoidRule *rule = (BoidRule *)ptr->data;
+  const BoidRule *rule = (BoidRule *)ptr->data;
   char name_esc[sizeof(rule->name) * 2];
 
   BLI_str_escape(name_esc, rule->name, sizeof(name_esc));
@@ -222,16 +222,16 @@ static void rna_BoidState_active_boid_rule_index_set(struct PointerRNA *ptr, int
   }
 }
 
-static int particle_id_check(PointerRNA *ptr)
+static int particle_id_check(const PointerRNA *ptr)
 {
-  ID *id = ptr->owner_id;
+  const ID *id = ptr->owner_id;
 
   return (GS(id->name) == ID_PA);
 }
 
-static char *rna_BoidSettings_path(PointerRNA *ptr)
+static char *rna_BoidSettings_path(const PointerRNA *ptr)
 {
-  BoidSettings *boids = (BoidSettings *)ptr->data;
+  const BoidSettings *boids = (BoidSettings *)ptr->data;
 
   if (particle_id_check(ptr)) {
     ParticleSettings *part = (ParticleSettings *)ptr->owner_id;
diff --git a/source/blender/makesrna/intern/rna_brush.c b/source/blender/makesrna/intern/rna_brush.c
index 4767ef2c017..72f5bd1923c 100644
--- a/source/blender/makesrna/intern/rna_brush.c
+++ b/source/blender/makesrna/intern/rna_brush.c
@@ -934,7 +934,7 @@ static const EnumPropertyItem *rna_Brush_stroke_itemf(bContext *C,
 }
 
 /* Grease Pencil Drawing Brushes Settings */
-static char *rna_BrushGpencilSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_BrushGpencilSettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.gpencil_paint.brush.gpencil_settings");
 }
diff --git a/source/blender/makesrna/intern/rna_camera.c b/source/blender/makesrna/intern/rna_camera.c
index f535cdcee96..92df7293c2e 100644
--- a/source/blender/makesrna/intern/rna_camera.c
+++ b/source/blender/makesrna/intern/rna_camera.c
@@ -117,7 +117,7 @@ static void rna_Camera_dof_update(Main *bmain, Scene *scene, PointerRNA *UNUSED(
   WM_main_add_notifier(NC_SCENE | ND_SEQUENCER, scene);
 }
 
-char *rna_CameraDOFSettings_path(PointerRNA *ptr)
+char *rna_CameraDOFSettings_path(const PointerRNA *ptr)
 {
   /* if there is ID-data, resolve the path using the index instead of by name,
    * since the name used is the name of the texture assigned, but the texture
diff --git a/source/blender/makesrna/intern/rna_cloth.c b/source/blender/makesrna/intern/rna_cloth.c
index 3ad901e5397..e45a1a3cc33 100644
--- a/source/blender/makesrna/intern/rna_cloth.c
+++ b/source/blender/makesrna/intern/rna_cloth.c
@@ -436,10 +436,10 @@ static void rna_ClothSettings_gravity_set(PointerRNA *ptr, const float *values)
   sim->gravity[2] = values[2];
 }
 
-static char *rna_ClothSettings_path(PointerRNA *ptr)
+static char *rna_ClothSettings_path(const PointerRNA *ptr)
 {
-  Object *ob = (Object *)ptr->owner_id;
-  ModifierData *md = BKE_modifiers_findby_type(ob, eModifierType_Cloth);
+  const Object *ob = (Object *)ptr->owner_id;
+  const ModifierData *md = BKE_modifiers_findby_type(ob, eModifierType_Cloth);
 
   if (md) {
     char name_esc[sizeof(md->name) * 2];
@@ -451,10 +451,10 @@ static char *rna_ClothSettings_path(PointerRNA *ptr)
   }
 }
 
-static char *rna_ClothCollisionSettings_path(PointerRNA *ptr)
+static char *rna_ClothCollisionSettings_path(const PointerRNA *ptr)
 {
-  Object *ob = (Object *)ptr->owner_id;
-  ModifierData *md = BKE_modifiers_findby_type(ob, eModifierType_Cloth);
+  const Object *ob = (Object *)ptr->owner_id;
+  const ModifierData *md = BKE_modifiers_findby_type(ob, eModifierType_Cloth);
 
   if (md) {
     char name_esc[sizeof(md->name) * 2];
diff --git a/source/blender/makesrna/intern/rna_color.c b/source/blender/makesrna/intern/rna_color.c
index 840674c7bc6..92cdcc6d781 100644
--- a/source/blender/makesrna/intern/rna_color.c
+++ b/source/blender/makesrna/intern/rna_color.c
@@ -157,7 +157,7 @@ static void rna_CurveMapping_clipmaxy_range(
   *max = 100.0f;
 }
 
-static char *rna_ColorRamp_path(PointerRNA *ptr)
+static char *rna_ColorRamp_path(const PointerRNA *ptr)
 {
   char *path = NULL;
 
@@ -208,7 +208,7 @@ static char *rna_ColorRamp_path(PointerRNA *ptr)
   return path;
 }
 
-static char *rna_ColorRampElement_path(PointerRNA *ptr)
+static char *rna_ColorRampElement_path(const PointerRNA *ptr)
 {
   PointerRNA ramp_ptr;
   PropertyRNA *prop;
@@ -438,7 +438,7 @@ static void rna_ColorManagedDisplaySettings_display_device_update(Main *bmain,
   }
 }
 
-static char *rna_ColorManagedDisplaySettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_ColorManagedDisplaySettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("display_settings");
 }
@@ -526,7 +526,7 @@ static void rna_ColorManagedViewSettings_use_curves_set(PointerRNA *ptr, bool va
   }
 }
 
-static char *rna_ColorManagedViewSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_ColorManagedViewSettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("view_settings");
 }
@@ -662,12 +662,12 @@ static void rna_ColorManagedColorspaceSettings_reload_update(Main *bmain,
   }
 }
 
-static char *rna_ColorManagedSequencerColorspaceSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_ColorManagedSequencerColorspaceSettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("sequencer_colorspace_settings");
 }
 
-static char *rna_ColorManagedInputColorspaceSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_ColorManagedInputColorspaceSettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("colorspace_settings");
 }
diff --git a/source/blender/makesrna/intern/rna_constraint.c b/source/blender/makesrna/intern/rna_constraint.c
index 63d8876ec8b..8829c655030 100644
--- a/source/blender/makesrna/intern/rna_constraint.c
+++ b/source/blender/makesrna/intern/rna_constraint.c
@@ -440,7 +440,7 @@ static char *rna_Constraint_do_compute_path(Object *ob, bConstraint *con)
   }
 }
 
-static char *rna_Constraint_path(PointerRNA *ptr)
+static char *rna_Constraint_path(const PointerRNA *ptr)
 {
   Object *ob = (Object *)ptr->owner_id;
   bConstraint *con = ptr->data;
@@ -448,7 +448,7 @@ static char *rna_Constraint_path(PointerRNA *ptr)
   return rna_Constraint_do_compute_path(ob, con);
 }
 
-static bConstraint *rna_constraint_from_target(PointerRNA *ptr)
+static bConstraint *rna_constraint_from_target(const PointerRNA *ptr)
 {
   Object *ob = (Object *)ptr->owner_id;
   bConstraintTarget *tgt = ptr->data;
@@ -456,7 +456,7 @@ static bConstraint *rna_constraint_from_target(PointerRNA *ptr)
   return BKE_constraint_find_from_target(ob, tgt, NULL);
 }
 
-static char *rna_ConstraintTarget_path(PointerRNA *ptr)
+static char *rna_ConstraintTarget_path(const PointerRNA *ptr)
 {
   Object *ob = (Object *)ptr->owner_id;
   bConstraintTarget *tgt = ptr->data;
@@ -691,11 +691,11 @@ static void rna_ActionConstraint_minmax_range(
   }
 }
 
-static int rna_SplineIKConstraint_joint_bindings_get_length(PointerRNA *ptr,
+static int rna_SplineIKConstraint_joint_bindings_get_length(const PointerRNA *ptr,
                                                             int length[RNA_MAX_ARRAY_DIMENSION])
 {
-  bConstraint *con = (bConstraint *)ptr->data;
-  bSplineIKConstraint *ikData = (bSplineIKConstraint *)con->data;
+  const bConstraint *con = (bConstraint *)ptr->data;
+  const bSplineIKConstraint *ikData = (bSplineIKConstraint *)con->data;
 
   if (ikData) {
     length[0] = ikData->numpoints;
diff --git a/source/blender/makesrna/intern/rna_curve.c b/source/blender/makesrna/intern/rna_curve.c
index fb911725836..49b78e90024 100644
--- a/source/blender/makesrna/intern/rna_curve.c
+++ b/source/blender/makesrna/intern/rna_curve.c
@@ -770,7 +770,7 @@ static void rna_Curve_active_spline_set(PointerRNA *ptr,
   }
 }
 
-static char *rna_Curve_spline_path(PointerRNA *ptr)
+static char *rna_Curve_spline_path(const PointerRNA *ptr)
 {
   Curve *cu = (Curve *)ptr->owner_id;
   ListBase *nubase = BKE_curve_nurbs_get(cu);
@@ -786,7 +786,7 @@ static char *rna_Curve_spline_path(PointerRNA *ptr)
 }
 
 /* use for both bezier and nurbs */
-static char *rna_Curve_spline_point_path(PointerRNA *ptr)
+static char *rna_Curve_spline_point_path(const PointerRNA *ptr)
 {
   Curve *cu = (Curve *)ptr->owner_id;
   Nurb *nu;
@@ -808,10 +808,10 @@ static char *rna_Curve_spline_point_path(PointerRNA *ptr)
   }
 }
 
-static char *rna_TextBox_path(PointerRNA *ptr)
+static char *rna_TextBox_path(const PointerRNA *ptr)
 {
-  Curve *cu = (Curve *)ptr->owner_id;
-  TextBox *tb = ptr->data;
+  const Curve *cu = (Curve *)ptr->owner_id;
+  const TextBox *tb = ptr->data;
   int index = (int)(tb - cu->tb);
 
   if (index >= 0 && index < cu->totbox) {
diff --git a/source/blender/makesrna/intern/rna_curves.c b/source/blender/makesrna/intern/rna_curves.c
index 2b406125409..7cf34db4cf4 100644
--- a/source/blender/makesrna/intern/rna_curves.c
+++ b/source/blender/makesrna/intern/rna_curves.c
@@ -30,7 +30,7 @@
 #  include "WM_api.h"
 #  include "WM_types.h"
 
-static Curves *rna_curves(PointerRNA *ptr)
+static Curves *rna_curves(const PointerRNA *ptr)
 {
   return (Curves *)ptr->owner_id;
 }
@@ -52,13 +52,18 @@ static void rna_Curves_curve_offset_data_begin(CollectionPropertyIterator *iter,
                            NULL);
 }
 
-static int rna_CurvePoint_index_get(PointerRNA *ptr)
+static int rna_CurvePoint_index_get_const(const PointerRNA *ptr)
 {
   const Curves *curves = rna_curves(ptr);
   const float(*co)[3] = ptr->data;
   return (int)(co - curves->geometry.position);
 }
 
+static int rna_CurvePoint_index_get(PointerRNA *ptr)
+{
+  return rna_CurvePoint_index_get_const(ptr);
+}
+
 static void rna_CurvePoint_location_get(PointerRNA *ptr, float value[3])
 {
   copy_v3_v3(value, (const float *)ptr->data);
@@ -89,20 +94,25 @@ static void rna_CurvePoint_radius_set(PointerRNA *ptr, float value)
   curves->geometry.radius[co - curves->geometry.position] = value;
 }
 
-static char *rna_CurvePoint_path(PointerRNA *ptr)
+static char *rna_CurvePoint_path(const PointerRNA *ptr)
 {
-  return BLI_sprintfN("points[%d]", rna_CurvePoint_index_get(ptr));
+  return BLI_sprintfN("points[%d]", rna_CurvePoint_index_get_const(ptr));
 }
 
-static int rna_CurveSlice_index_get(PointerRNA *ptr)
+static int rna_CurveSlice_index_get_const(const PointerRNA *ptr)
 {
   Curves *curves = rna_curves(ptr);
   return (int)((int *)ptr->data - curves->geometry.curve_offsets);
 }
 
-static char *rna_CurveSlice_path(PointerRNA *ptr)
+static int rna_CurveSlice_index_get(PointerRNA *ptr)
+{
+  return rna_CurveSlice_index_get_const(ptr);
+}
+
+static char *rna_CurveSlice_path(const PointerRNA *ptr)
 {
-  return BLI_sprintfN("curves[%d]", rna_CurveSlice_index_get(ptr));
+  return BLI_sprintfN("curves[%d]", rna_CurveSlice_index_get_const(ptr));
 }
 
 static void rna_CurveSlice_points_begin(CollectionPropertyIterator *iter, PointerRNA *ptr)
diff --git a/source/blender/makesrna/intern/rna_dynamicpaint.c b/source/blender/makesrna/intern/rna_dynamicpaint.c
index ed6d4996c1e..6f9fe3741f7 100644
--- a/source/blender/makesrna/intern/rna_dynamicpaint.c
+++ b/source/blender/makesrna/intern/rna_dynamicpaint.c
@@ -37,30 +37,30 @@ const EnumPropertyItem rna_enum_prop_dynamicpaint_type_items[] = {
 #  include "DEG_depsgraph.h"
 #  include "DEG_depsgraph_build.h"
 
-static char *rna_DynamicPaintCanvasSettings_path(PointerRNA *ptr)
+static char *rna_DynamicPaintCanvasSettings_path(const PointerRNA *ptr)
 {
-  DynamicPaintCanvasSettings *settings = (DynamicPaintCanvasSettings *)ptr->data;
-  ModifierData *md = (ModifierData *)settings->pmd;
+  const DynamicPaintCanvasSettings *settings = (DynamicPaintCanvasSettings *)ptr->data;
+  const ModifierData *md = (ModifierData *)settings->pmd;
   char name_esc[sizeof(md->name) * 2];
 
   BLI_str_escape(name_esc, md->name, sizeof(name_esc));
   return BLI_sprintfN("modifiers[\"%s\"].canvas_settings", name_esc);
 }
 
-static char *rna_DynamicPaintBrushSettings_path(PointerRNA *ptr)
+static char *rna_DynamicPaintBrushSettings_path(const PointerRNA *ptr)
 {
-  DynamicPaintBrushSettings *settings = (DynamicPaintBrushSettings *)ptr->data;
-  ModifierData *md = (ModifierData *)settings->pmd;
+  const DynamicPaintBrushSettings *settings = (DynamicPaintBrushSettings *)ptr->data;
+  const ModifierData *md = (ModifierData *)settings->pmd;
   char name_esc[sizeof(md->name) * 2];
 
   BLI_str_escape(name_esc, md->name, sizeof(name_esc));
   return BLI_sprintfN("modifiers[\"%s\"].brush_settings", name_esc);
 }
 
-static char *rna_DynamicPaintSurface_path(PointerRNA *ptr)
+static char *rna_DynamicPaintSurface_path(const PointerRNA *ptr)
 {
-  DynamicPaintSurface *surface = (DynamicPaintSurface *)ptr->data;
-  ModifierData *md = (ModifierData *)surface->canvas->pmd;
+  const DynamicPaintSurface *surface = (DynamicPaintSurface *)ptr->data;
+  const ModifierData *md = (ModifierData *)surface->canvas->pmd;
   char name_esc[sizeof(md->name) * 2];
   char name_esc_surface[sizeof(surface->name) * 2];
 
diff --git a/source/blender/makesrna/intern/rna_fcurve.c b/source/blender/makesrna/intern/rna_fcurve.c
index af14a169d68..e14a291dd01 100644
--- a/source/blender/makesrna/intern/rna_fcurve.c
+++ b/source/blender/makesrna/intern/rna_fcurve.c
@@ -786,11 +786,11 @@ static void rna_FModifier_active_update(Main *bmain, Scene *scene, PointerRNA *p
   rna_FModifier_update(bmain, scene, ptr);
 }
 
-static int rna_FModifierGenerator_coefficients_get_length(PointerRNA *ptr,
+static int rna_FModifierGenerator_coefficients_get_length(const PointerRNA *ptr,
                                                           int length[RNA_MAX_ARRAY_DIMENSION])
 {
-  FModifier *fcm = (FModifier *)ptr->data;
-  FMod_Generator *gen = fcm->data;
+  const FModifier *fcm = (FModifier *)ptr->data;
+  const FMod_Generator *gen = fcm->data;
 
   if (gen) {
     length[0] = gen->arraysize;
diff --git a/source/blender/makesrna/intern/rna_fluid.c b/source/blender/makesrna/intern/rna_fluid.c
index e0ec146a248..3b22ae9d40f 100644
--- a/source/blender/makesrna/intern/rna_fluid.c
+++ b/source/blender/makesrna/intern/rna_fluid.c
@@ -857,30 +857,30 @@ static void rna_Fluid_domaintype_set(struct PointerRNA *ptr, int value)
   BKE_fluid_fields_sanitize(settings);
 }
 
-static char *rna_FluidDomainSettings_path(PointerRNA *ptr)
+static char *rna_FluidDomainSettings_path(const PointerRNA *ptr)
 {
-  FluidDomainSettings *settings = (FluidDomainSettings *)ptr->data;
-  ModifierData *md = (ModifierData *)settings->fmd;
+  const FluidDomainSettings *settings = (FluidDomainSettings *)ptr->data;
+  const ModifierData *md = (ModifierData *)settings->fmd;
   char name_esc[sizeof(md->name) * 2];
 
   BLI_str_escape(name_esc, md->name, sizeof(name_esc));
   return BLI_sprintfN("modifiers[\"%s\"].domain_settings", name_esc);
 }
 
-static char *rna_FluidFlowSettings_path(PointerRNA *ptr)
+static char *rna_FluidFlowSettings_path(const PointerRNA *ptr)
 {
-  FluidFlowSettings *settings = (FluidFlowSettings *)ptr->data;
-  ModifierData *md = (ModifierData *)settings->fmd;
+  const FluidFlowSettings *settings = (FluidFlowSettings *)ptr->data;
+  const ModifierData *md = (ModifierData *)settings->fmd;
   char name_esc[sizeof(md->name) * 2];
 
   BLI_str_escape(name_esc, md->name, sizeof(name_esc));
   return BLI_sprintfN("modifiers[\"%s\"].flow_settings", name_esc);
 }
 
-static char *rna_FluidEffectorSettings_path(PointerRNA *ptr)
+static char *rna_FluidEffectorSettings_path(const PointerRNA *ptr)
 {
-  FluidEffectorSettings *settings = (FluidEffectorSettings *)ptr->data;
-  ModifierData *md = (ModifierData *)settings->fmd;
+  const FluidEffectorSettings *settings = (FluidEffectorSettings *)ptr->data;
+  const ModifierData *md = (ModifierData *)settings->fmd;
   char name_esc[sizeof(md->name) * 2];
 
   BLI_str_escape(name_esc, md->name, sizeof(name_esc));
@@ -893,9 +893,10 @@ static char *rna_FluidEffectorSettings_path(PointerRNA *ptr)
 
 #  ifdef WITH_FLUID
 
-static int rna_FluidModifier_grid_get_length(PointerRNA *ptr, int length[RNA_MAX_ARRAY_DIMENSION])
+static int rna_FluidModifier_grid_get_length(const PointerRNA *ptr,
+                                             int length[RNA_MAX_ARRAY_DIMENSION])
 {
-  FluidDomainSettings *fds = (FluidDomainSettings *)ptr->data;
+  const FluidDomainSettings *fds = (FluidDomainSettings *)ptr->data;
   float *density = NULL;
   int size = 0;
 
@@ -918,7 +919,7 @@ static int rna_FluidModifier_grid_get_length(PointerRNA *ptr, int length[RNA_MAX
   return length[0];
 }
 
-static int rna_FluidModifier_color_grid_get_length(PointerRNA *ptr,
+static int rna_FluidModifier_color_grid_get_length(const PointerRNA *ptr,
                                                    int length[RNA_MAX_ARRAY_DIMENSION])
 {
   rna_FluidModifier_grid_get_length(ptr, length);
@@ -927,10 +928,10 @@ static int rna_FluidModifier_color_grid_get_length(PointerRNA *ptr,
   return length[0];
 }
 
-static int rna_FluidModifier_velocity_grid_get_length(PointerRNA *ptr,
+static int rna_FluidModifier_velocity_grid_get_length(const PointerRNA *ptr,
                                                       int length[RNA_MAX_ARRAY_DIMENSION])
 {
-  FluidDomainSettings *fds = (FluidDomainSettings *)ptr->data;
+  const FluidDomainSettings *fds = (FluidDomainSettings *)ptr->data;
   float *vx = NULL;
   float *vy = NULL;
   float *vz = NULL;
@@ -948,10 +949,10 @@ static int rna_FluidModifier_velocity_grid_get_length(PointerRNA *ptr,
   return length[0];
 }
 
-static int rna_FluidModifier_heat_grid_get_length(PointerRNA *ptr,
+static int rna_FluidModifier_heat_grid_get_length(const PointerRNA *ptr,
                                                   int length[RNA_MAX_ARRAY_DIMENSION])
 {
-  FluidDomainSettings *fds = (FluidDomainSettings *)ptr->data;
+  const FluidDomainSettings *fds = (FluidDomainSettings *)ptr->data;
   float *heat = NULL;
   int size = 0;
 
diff --git a/source/blender/makesrna/intern/rna_gpencil.c b/source/blender/makesrna/intern/rna_gpencil.c
index 9a9b6d582e5..6854ce37c94 100644
--- a/source/blender/makesrna/intern/rna_gpencil.c
+++ b/source/blender/makesrna/intern/rna_gpencil.c
@@ -307,7 +307,7 @@ bool rna_GPencil_datablocks_obdata_poll(PointerRNA *UNUSED(ptr), const PointerRN
   return (gpd->flag & GP_DATA_ANNOTATIONS) == 0;
 }
 
-static char *rna_GPencilLayer_path(PointerRNA *ptr)
+static char *rna_GPencilLayer_path(const PointerRNA *ptr)
 {
   bGPDlayer *gpl = (bGPDlayer *)ptr->data;
   char name_esc[sizeof(gpl->info) * 2];
@@ -407,7 +407,7 @@ static void rna_GPencilLayer_parent_bone_set(PointerRNA *ptr, const char *value)
   }
 }
 
-static char *rna_GPencilLayerMask_path(PointerRNA *ptr)
+static char *rna_GPencilLayerMask_path(const PointerRNA *ptr)
 {
   bGPdata *gpd = (bGPdata *)ptr->owner_id;
   bGPDlayer *gpl = BKE_gpencil_layer_active_get(gpd);
@@ -1122,7 +1122,7 @@ static void rna_GPencil_clear(bGPdata *gpd)
   WM_main_add_notifier(NC_GPENCIL | ND_DATA | NA_EDITED, NULL);
 }
 
-static char *rna_GreasePencilGrid_path(PointerRNA *UNUSED(ptr))
+static char *rna_GreasePencilGrid_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("grid");
 }
diff --git a/source/blender/makesrna/intern/rna_gpencil_modifier.c b/source/blender/makesrna/intern/rna_gpencil_modifier.c
index ea2bb9630fb..8bbc33d2381 100644
--- a/source/blender/makesrna/intern/rna_gpencil_modifier.c
+++ b/source/blender/makesrna/intern/rna_gpencil_modifier.c
@@ -341,9 +341,9 @@ static void rna_GpencilModifier_name_set(PointerRNA *ptr, const char *value)
   BKE_animdata_fix_paths_rename_all(NULL, "grease_pencil_modifiers", oldname, gmd->name);
 }
 
-static char *rna_GpencilModifier_path(PointerRNA *ptr)
+static char *rna_GpencilModifier_path(const PointerRNA *ptr)
 {
-  GpencilModifierData *gmd = ptr->data;
+  const GpencilModifierData *gmd = ptr->data;
   char name_esc[sizeof(gmd->name) * 2];
 
   BLI_str_escape(name_esc, gmd->name, sizeof(name_esc));
@@ -752,11 +752,11 @@ static void rna_GpencilDash_segments_begin(CollectionPropertyIterator *iter, Poi
       iter, dmd->segments, sizeof(DashGpencilModifierSegment), dmd->segments_len, false, NULL);
 }
 
-static char *rna_DashGpencilModifierSegment_path(PointerRNA *ptr)
+static char *rna_DashGpencilModifierSegment_path(const PointerRNA *ptr)
 {
-  DashGpencilModifierSegment *ds = (DashGpencilModifierSegment *)ptr->data;
+  const DashGpencilModifierSegment *ds = (DashGpencilModifierSegment *)ptr->data;
 
-  DashGpencilModifierData *dmd = (DashGpencilModifierData *)ds->dmd;
+  const DashGpencilModifierData *dmd = (DashGpencilModifierData *)ds->dmd;
 
   BLI_assert(dmd != NULL);
 
diff --git a/source/blender/makesrna/intern/rna_image.c b/source/blender/makesrna/intern/rna_image.c
index 81708ac8e65..cea1ff60ff7 100644
--- a/source/blender/makesrna/intern/rna_image.c
+++ b/source/blender/makesrna/intern/rna_image.c
@@ -175,7 +175,7 @@ static void rna_ImageUser_relations_update(Main *bmain, Scene *scene, PointerRNA
   DEG_relations_tag_update(bmain);
 }
 
-static char *rna_ImageUser_path(PointerRNA *ptr)
+static char *rna_ImageUser_path(const PointerRNA *ptr)
 {
   if (ptr->owner_id) {
     /* ImageUser *iuser = ptr->data; */
@@ -446,7 +446,7 @@ static int rna_Image_frame_duration_get(PointerRNA *ptr)
   return duration;
 }
 
-static int rna_Image_pixels_get_length(PointerRNA *ptr, int length[RNA_MAX_ARRAY_DIMENSION])
+static int rna_Image_pixels_get_length(const PointerRNA *ptr, int length[RNA_MAX_ARRAY_DIMENSION])
 {
   Image *ima = (Image *)ptr->owner_id;
   ImBuf *ibuf;
diff --git a/source/blender/makesrna/intern/rna_internal.h b/source/blender/makesrna/intern/rna_internal.h
index bf4eec433c4..058c63f640a 100644
--- a/source/blender/makesrna/intern/rna_internal.h
+++ b/source/blender/makesrna/intern/rna_internal.h
@@ -373,7 +373,7 @@ void rna_ViewLayer_active_lightgroup_index_set(PointerRNA *ptr, int value);
  * `rna_path_buffer_size` should be at least `sizeof(ViewLayer.name) * 3`.
  * \return actual length of the generated RNA path.
  */
-size_t rna_ViewLayer_path_buffer_get(struct ViewLayer *view_layer,
+size_t rna_ViewLayer_path_buffer_get(const struct ViewLayer *view_layer,
                                      char *r_rna_path,
                                      const size_t rna_path_buffer_size);
 
@@ -402,8 +402,8 @@ bool rna_GPencil_datablocks_annotations_poll(struct PointerRNA *ptr,
                                              const struct PointerRNA value);
 bool rna_GPencil_datablocks_obdata_poll(struct PointerRNA *ptr, const struct PointerRNA value);
 
-char *rna_TextureSlot_path(struct PointerRNA *ptr);
-char *rna_Node_ImageUser_path(struct PointerRNA *ptr);
+char *rna_TextureSlot_path(const struct PointerRNA *ptr);
+char *rna_Node_ImageUser_path(const struct PointerRNA *ptr);
 
 /* Set U.is_dirty and redraw. */
 
diff --git a/source/blender/makesrna/intern/rna_internal_types.h b/source/blender/makesrna/intern/rna_internal_types.h
index 4db438f04b4..a5b719cf753 100644
--- a/source/blender/makesrna/intern/rna_internal_types.h
+++ b/source/blender/makesrna/intern/rna_internal_types.h
@@ -50,9 +50,10 @@ typedef int (*EditableFunc)(struct PointerRNA *ptr, const char **r_info);
 typedef int (*ItemEditableFunc)(struct PointerRNA *ptr, int index);
 typedef struct IDProperty **(*IDPropertiesFunc)(struct PointerRNA *ptr);
 typedef struct StructRNA *(*StructRefineFunc)(struct PointerRNA *ptr);
-typedef char *(*StructPathFunc)(struct PointerRNA *ptr);
+typedef char *(*StructPathFunc)(const struct PointerRNA *ptr);
 
-typedef int (*PropArrayLengthGetFunc)(struct PointerRNA *ptr, int length[RNA_MAX_ARRAY_DIMENSION]);
+typedef int (*PropArrayLengthGetFunc)(const struct PointerRNA *ptr,
+                                      int length[RNA_MAX_ARRAY_DIMENSION]);
 typedef bool (*PropBooleanGetFunc)(struct PointerRNA *ptr);
 typedef void (*PropBooleanSetFunc)(struct PointerRNA *ptr, bool value);
 typedef void (*PropBooleanArrayGetFunc)(struct PointerRNA *ptr, bool *values);
diff --git a/source/blender/makesrna/intern/rna_key.c b/source/blender/makesrna/intern/rna_key.c
index 50b25157989..2f6fb30dc49 100644
--- a/source/blender/makesrna/intern/rna_key.c
+++ b/source/blender/makesrna/intern/rna_key.c
@@ -159,7 +159,7 @@ static void rna_ShapeKey_slider_max_set(PointerRNA *ptr, float value)
  *       such case looks rather unlikely - and not worth adding some kind of caching in key-blocks.
  */
 
-static Mesh *rna_KeyBlock_normals_get_mesh(PointerRNA *ptr, ID *id)
+static Mesh *rna_KeyBlock_normals_get_mesh(const PointerRNA *ptr, ID *id)
 {
   Key *key = rna_ShapeKey_find_key((id == NULL && ptr != NULL) ? ptr->owner_id : id);
   id = key ? key->from : NULL;
@@ -182,9 +182,10 @@ static Mesh *rna_KeyBlock_normals_get_mesh(PointerRNA *ptr, ID *id)
   return NULL;
 }
 
-static int rna_KeyBlock_normals_vert_len(PointerRNA *ptr, int length[RNA_MAX_ARRAY_DIMENSION])
+static int rna_KeyBlock_normals_vert_len(const PointerRNA *ptr,
+                                         int length[RNA_MAX_ARRAY_DIMENSION])
 {
-  Mesh *me = rna_KeyBlock_normals_get_mesh(ptr, NULL);
+  const Mesh *me = rna_KeyBlock_normals_get_mesh(ptr, NULL);
 
   length[0] = me ? me->totvert : 0;
   length[1] = 3;
@@ -211,9 +212,10 @@ static void rna_KeyBlock_normals_vert_calc(ID *id,
   BKE_keyblock_mesh_calc_normals(data, me, (float(*)[3])(*normals), NULL, NULL);
 }
 
-static int rna_KeyBlock_normals_poly_len(PointerRNA *ptr, int length[RNA_MAX_ARRAY_DIMENSION])
+static int rna_KeyBlock_normals_poly_len(const PointerRNA *ptr,
+                                         int length[RNA_MAX_ARRAY_DIMENSION])
 {
-  Mesh *me = rna_KeyBlock_normals_get_mesh(ptr, NULL);
+  const Mesh *me = rna_KeyBlock_normals_get_mesh(ptr, NULL);
 
   length[0] = me ? me->totpoly : 0;
   length[1] = 3;
@@ -240,9 +242,10 @@ static void rna_KeyBlock_normals_poly_calc(ID *id,
   BKE_keyblock_mesh_calc_normals(data, me, NULL, (float(*)[3])(*normals), NULL);
 }
 
-static int rna_KeyBlock_normals_loop_len(PointerRNA *ptr, int length[RNA_MAX_ARRAY_DIMENSION])
+static int rna_KeyBlock_normals_loop_len(const PointerRNA *ptr,
+                                         int length[RNA_MAX_ARRAY_DIMENSION])
 {
-  Mesh *me = rna_KeyBlock_normals_get_mesh(ptr, NULL);
+  const Mesh *me = rna_KeyBlock_normals_get_mesh(ptr, NULL);
 
   length[0] = me ? me->totloop : 0;
   length[1] = 3;
@@ -656,10 +659,10 @@ int rna_ShapeKey_data_lookup_int(PointerRNA *ptr, int index, PointerRNA *r_ptr)
   return false;
 }
 
-static char *rna_ShapeKey_path(PointerRNA *ptr)
+static char *rna_ShapeKey_path(const PointerRNA *ptr)
 {
-  KeyBlock *kb = (KeyBlock *)ptr->data;
-  ID *id = ptr->owner_id;
+  const KeyBlock *kb = (KeyBlock *)ptr->data;
+  const ID *id = ptr->owner_id;
   char name_esc[sizeof(kb->name) * 2];
 
   BLI_str_escape(name_esc, kb->name, sizeof(name_esc));
@@ -750,7 +753,7 @@ static int rna_ShapeKeyPoint_get_index(Key *key, KeyBlock *kb, float *point)
   return (int)(pt - start) / key->elemsize;
 }
 
-static char *rna_ShapeKeyPoint_path(PointerRNA *ptr)
+static char *rna_ShapeKeyPoint_path(const PointerRNA *ptr)
 {
   ID *id = ptr->owner_id;
   Key *key = rna_ShapeKey_find_key(ptr->owner_id);
diff --git a/source/blender/makesrna/intern/rna_lattice.c b/source/blender/makesrna/intern/rna_lattice.c
index 8fb36c035b7..f94804cb609 100644
--- a/source/blender/makesrna/intern/rna_lattice.c
+++ b/source/blender/makesrna/intern/rna_lattice.c
@@ -209,11 +209,11 @@ static void rna_Lattice_vg_name_set(PointerRNA *ptr, const char *value)
 }
 
 /* annoying, but is a consequence of RNA structures... */
-static char *rna_LatticePoint_path(PointerRNA *ptr)
+static char *rna_LatticePoint_path(const PointerRNA *ptr)
 {
-  Lattice *lt = (Lattice *)ptr->owner_id;
-  void *point = ptr->data;
-  BPoint *points = NULL;
+  const Lattice *lt = (Lattice *)ptr->owner_id;
+  const void *point = ptr->data;
+  const BPoint *points = NULL;
 
   if (lt->editlatt && lt->editlatt->latt->def) {
     points = lt->editlatt->latt->def;
diff --git a/source/blender/makesrna/intern/rna_layer.c b/source/blender/makesrna/intern/rna_layer.c
index 42414a9931b..8c9c66bffcf 100644
--- a/source/blender/makesrna/intern/rna_layer.c
+++ b/source/blender/makesrna/intern/rna_layer.c
@@ -98,7 +98,7 @@ static void rna_LayerObjects_active_object_set(PointerRNA *ptr,
   }
 }
 
-size_t rna_ViewLayer_path_buffer_get(ViewLayer *view_layer,
+size_t rna_ViewLayer_path_buffer_get(const ViewLayer *view_layer,
                                      char *r_rna_path,
                                      const size_t rna_path_buffer_size)
 {
@@ -108,9 +108,9 @@ size_t rna_ViewLayer_path_buffer_get(ViewLayer *view_layer,
   return BLI_snprintf_rlen(r_rna_path, rna_path_buffer_size, "view_layers[\"%s\"]", name_esc);
 }
 
-static char *rna_ViewLayer_path(PointerRNA *ptr)
+static char *rna_ViewLayer_path(const PointerRNA *ptr)
 {
-  ViewLayer *view_layer = (ViewLayer *)ptr->data;
+  const ViewLayer *view_layer = (ViewLayer *)ptr->data;
   char rna_path[sizeof(view_layer->name) * 3];
 
   rna_ViewLayer_path_buffer_get(view_layer, rna_path, sizeof(rna_path));
diff --git a/source/blender/makesrna/intern/rna_linestyle.c b/source/blender/makesrna/intern/rna_linestyle.c
index 2a8a3a76c6d..c18ee461fae 100644
--- a/source/blender/makesrna/intern/rna_linestyle.c
+++ b/source/blender/makesrna/intern/rna_linestyle.c
@@ -239,33 +239,33 @@ static StructRNA *rna_LineStyle_geometry_modifier_refine(struct PointerRNA *ptr)
   }
 }
 
-static char *rna_LineStyle_color_modifier_path(PointerRNA *ptr)
+static char *rna_LineStyle_color_modifier_path(const PointerRNA *ptr)
 {
-  LineStyleModifier *m = (LineStyleModifier *)ptr->data;
+  const LineStyleModifier *m = (LineStyleModifier *)ptr->data;
   char name_esc[sizeof(m->name) * 2];
   BLI_str_escape(name_esc, m->name, sizeof(name_esc));
   return BLI_sprintfN("color_modifiers[\"%s\"]", name_esc);
 }
 
-static char *rna_LineStyle_alpha_modifier_path(PointerRNA *ptr)
+static char *rna_LineStyle_alpha_modifier_path(const PointerRNA *ptr)
 {
-  LineStyleModifier *m = (LineStyleModifier *)ptr->data;
+  const LineStyleModifier *m = (LineStyleModifier *)ptr->data;
   char name_esc[sizeof(m->name) * 2];
   BLI_str_escape(name_esc, m->name, sizeof(name_esc));
   return BLI_sprintfN("alpha_modifiers[\"%s\"]", name_esc);
 }
 
-static char *rna_LineStyle_thickness_modifier_path(PointerRNA *ptr)
+static char *rna_LineStyle_thickness_modifier_path(const PointerRNA *ptr)
 {
-  LineStyleModifier *m = (LineStyleModifier *)ptr->data;
+  const LineStyleModifier *m = (LineStyleModifier *)ptr->data;
   char name_esc[sizeof(m->name) * 2];
   BLI_str_escape(name_esc, m->name, sizeof(name_esc));
   return BLI_sprintfN("thickness_modifiers[\"%s\"]", name_esc);
 }
 
-static char *rna_LineStyle_geometry_modifier_path(PointerRNA *ptr)
+static char *rna_LineStyle_geometry_modifier_path(const PointerRNA *ptr)
 {
-  LineStyleModifier *m = (LineStyleModifier *)ptr->data;
+  const LineStyleModifier *m = (LineStyleModifier *)ptr->data;
   char name_esc[sizeof(m->name) * 2];
   BLI_str_escape(name_esc, m->name, sizeof(name_esc));
   return BLI_sprintfN("geometry_modifiers[\"%s\"]", name_esc);
diff --git a/source/blender/makesrna/intern/rna_mask.c b/source/blender/makesrna/intern/rna_mask.c
index 2247a16a7a0..3dac148f7d4 100644
--- a/source/blender/makesrna/intern/rna_mask.c
+++ b/source/blender/makesrna/intern/rna_mask.c
@@ -165,9 +165,9 @@ static void rna_Mask_layer_active_index_range(
   *softmax = *max;
 }
 
-static char *rna_MaskLayer_path(PointerRNA *ptr)
+static char *rna_MaskLayer_path(const PointerRNA *ptr)
 {
-  MaskLayer *masklay = (MaskLayer *)ptr->data;
+  const MaskLayer *masklay = (MaskLayer *)ptr->data;
   char name_esc[sizeof(masklay->name) * 2];
   BLI_str_escape(name_esc, masklay->name, sizeof(name_esc));
   return BLI_sprintfN("layers[\"%s\"]", name_esc);
diff --git a/source/blender/makesrna/intern/rna_material.c b/source/blender/makesrna/intern/rna_material.c
index 15e7e12bbf8..1de144d81ef 100644
--- a/source/blender/makesrna/intern/rna_material.c
+++ b/source/blender/makesrna/intern/rna_material.c
@@ -362,7 +362,7 @@ static void rna_gpcolordata_uv_update(Main *bmain, Scene *scene, PointerRNA *ptr
   rna_MaterialGpencil_update(bmain, scene, ptr);
 }
 
-static char *rna_GpencilColorData_path(PointerRNA *UNUSED(ptr))
+static char *rna_GpencilColorData_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("grease_pencil");
 }
diff --git a/source/blender/makesrna/intern/rna_mesh.c b/source/blender/makesrna/intern/rna_mesh.c
index 24f13aeac9c..da4be3cd0da 100644
--- a/source/blender/makesrna/intern/rna_mesh.c
+++ b/source/blender/makesrna/intern/rna_mesh.c
@@ -71,7 +71,7 @@ static const EnumPropertyItem rna_enum_mesh_remesh_mode_items[] = {
 /** \name Generic Helpers
  * \{ */
 
-static Mesh *rna_mesh(PointerRNA *ptr)
+static Mesh *rna_mesh(const PointerRNA *ptr)
 {
   Mesh *me = (Mesh *)ptr->owner_id;
   return me;
@@ -102,7 +102,7 @@ static CustomData *rna_mesh_fdata_helper(Mesh *me)
   return (me->edit_mesh) ? NULL : &me->fdata;
 }
 
-static CustomData *rna_mesh_vdata(PointerRNA *ptr)
+static CustomData *rna_mesh_vdata(const PointerRNA *ptr)
 {
   Mesh *me = rna_mesh(ptr);
   return rna_mesh_vdata_helper(me);
@@ -114,13 +114,13 @@ static CustomData *rna_mesh_edata(PointerRNA *ptr)
   return rna_mesh_edata_helper(me);
 }
 #  endif
-static CustomData *rna_mesh_pdata(PointerRNA *ptr)
+static CustomData *rna_mesh_pdata(const PointerRNA *ptr)
 {
   Mesh *me = rna_mesh(ptr);
   return rna_mesh_pdata_helper(me);
 }
 
-static CustomData *rna_mesh_ldata(PointerRNA *ptr)
+static CustomData *rna_mesh_ldata(const PointerRNA *ptr)
 {
   Mesh *me = rna_mesh(ptr);
   return rna_mesh_ldata_helper(me);
@@ -689,9 +689,9 @@ DEFINE_CUSTOMDATA_LAYER_COLLECTION_ACTIVEITEM(uv_layer, ldata, CD_MLOOPUV, rende
 
 /* MeshUVLoopLayer */
 
-static char *rna_MeshUVLoopLayer_path(PointerRNA *ptr)
+static char *rna_MeshUVLoopLayer_path(const PointerRNA *ptr)
 {
-  CustomDataLayer *cdl = ptr->data;
+  const CustomDataLayer *cdl = ptr->data;
   char name_esc[sizeof(cdl->name) * 2];
   BLI_str_escape(name_esc, cdl->name, sizeof(name_esc));
   return BLI_sprintfN("uv_layers[\"%s\"]", name_esc);
@@ -932,16 +932,16 @@ static int rna_Mesh_polygon_string_layers_length(PointerRNA *ptr)
 /* Skin vertices */
 DEFINE_CUSTOMDATA_LAYER_COLLECTION(skin_vertice, vdata, CD_MVERT_SKIN)
 
-static char *rna_MeshSkinVertexLayer_path(PointerRNA *ptr)
+static char *rna_MeshSkinVertexLayer_path(const PointerRNA *ptr)
 {
-  CustomDataLayer *cdl = ptr->data;
+  const CustomDataLayer *cdl = ptr->data;
   char name_esc[sizeof(cdl->name) * 2];
   BLI_str_escape(name_esc, cdl->name, sizeof(name_esc));
   return BLI_sprintfN("skin_vertices[\"%s\"]", name_esc);
 }
 
-static char *rna_VertCustomData_data_path(PointerRNA *ptr, const char *collection, int type);
-static char *rna_MeshSkinVertex_path(PointerRNA *ptr)
+static char *rna_VertCustomData_data_path(const PointerRNA *ptr, const char *collection, int type);
+static char *rna_MeshSkinVertex_path(const PointerRNA *ptr)
 {
   return rna_VertCustomData_data_path(ptr, "skin_vertices", CD_MVERT_SKIN);
 }
@@ -964,8 +964,7 @@ static int rna_MeshSkinVertexLayer_data_length(PointerRNA *ptr)
 /* Vertex creases */
 DEFINE_CUSTOMDATA_LAYER_COLLECTION(vertex_crease, vdata, CD_CREASE)
 
-static char *rna_VertCustomData_data_path(PointerRNA *ptr, const char *collection, int type);
-static char *rna_MeshVertexCreaseLayer_path(PointerRNA *ptr)
+static char *rna_MeshVertexCreaseLayer_path(const PointerRNA *ptr)
 {
   return rna_VertCustomData_data_path(ptr, "vertex_creases", CD_CREASE);
 }
@@ -988,15 +987,15 @@ static int rna_MeshVertexCreaseLayer_data_length(PointerRNA *ptr)
 /* Paint mask */
 DEFINE_CUSTOMDATA_LAYER_COLLECTION(vertex_paint_mask, vdata, CD_PAINT_MASK)
 
-static char *rna_MeshPaintMaskLayer_path(PointerRNA *ptr)
+static char *rna_MeshPaintMaskLayer_path(const PointerRNA *ptr)
 {
-  CustomDataLayer *cdl = ptr->data;
+  const CustomDataLayer *cdl = ptr->data;
   char name_esc[sizeof(cdl->name) * 2];
   BLI_str_escape(name_esc, cdl->name, sizeof(name_esc));
   return BLI_sprintfN("vertex_paint_masks[\"%s\"]", name_esc);
 }
 
-static char *rna_MeshPaintMask_path(PointerRNA *ptr)
+static char *rna_MeshPaintMask_path(const PointerRNA *ptr)
 {
   return rna_VertCustomData_data_path(ptr, "vertex_paint_masks", CD_PAINT_MASK);
 }
@@ -1023,9 +1022,9 @@ DEFINE_CUSTOMDATA_LAYER_COLLECTION(face_map, pdata, CD_FACEMAP)
 DEFINE_CUSTOMDATA_LAYER_COLLECTION_ACTIVEITEM(
     face_map, pdata, CD_FACEMAP, active, MeshFaceMapLayer)
 
-static char *rna_MeshFaceMapLayer_path(PointerRNA *ptr)
+static char *rna_MeshFaceMapLayer_path(const PointerRNA *ptr)
 {
-  CustomDataLayer *cdl = ptr->data;
+  const CustomDataLayer *cdl = ptr->data;
   char name_esc[sizeof(cdl->name) * 2];
   BLI_str_escape(name_esc, cdl->name, sizeof(name_esc));
   return BLI_sprintfN("face_maps[\"%s\"]", name_esc);
@@ -1090,9 +1089,10 @@ static void rna_Mesh_face_map_remove(struct Mesh *me,
 /* End face maps */
 
 /* poly.vertices - this is faked loop access for convenience */
-static int rna_MeshPoly_vertices_get_length(PointerRNA *ptr, int length[RNA_MAX_ARRAY_DIMENSION])
+static int rna_MeshPoly_vertices_get_length(const PointerRNA *ptr,
+                                            int length[RNA_MAX_ARRAY_DIMENSION])
 {
-  MPoly *mp = (MPoly *)ptr->data;
+  const MPoly *mp = (MPoly *)ptr->data;
   /* NOTE: raw access uses dummy item, this _could_ crash,
    * watch out for this, mface uses it but it can't work here. */
   return (length[0] = mp->totloop);
@@ -1182,11 +1182,11 @@ static int rna_MeshLoop_index_get(PointerRNA *ptr)
 
 /* path construction */
 
-static char *rna_VertexGroupElement_path(PointerRNA *ptr)
+static char *rna_VertexGroupElement_path(const PointerRNA *ptr)
 {
-  Mesh *me = rna_mesh(ptr); /* XXX not always! */
-  MDeformWeight *dw = (MDeformWeight *)ptr->data;
-  MDeformVert *dvert;
+  const Mesh *me = rna_mesh(ptr); /* XXX not always! */
+  const MDeformWeight *dw = (MDeformWeight *)ptr->data;
+  const MDeformVert *dvert;
   int a, b;
 
   for (a = 0, dvert = me->dvert; a < me->totvert; a++, dvert++) {
@@ -1200,37 +1200,37 @@ static char *rna_VertexGroupElement_path(PointerRNA *ptr)
   return NULL;
 }
 
-static char *rna_MeshPolygon_path(PointerRNA *ptr)
+static char *rna_MeshPolygon_path(const PointerRNA *ptr)
 {
   return BLI_sprintfN("polygons[%d]", (int)((MPoly *)ptr->data - rna_mesh(ptr)->mpoly));
 }
 
-static char *rna_MeshLoopTriangle_path(PointerRNA *ptr)
+static char *rna_MeshLoopTriangle_path(const PointerRNA *ptr)
 {
   return BLI_sprintfN("loop_triangles[%d]",
                       (int)((MLoopTri *)ptr->data - rna_mesh(ptr)->runtime.looptris.array));
 }
 
-static char *rna_MeshEdge_path(PointerRNA *ptr)
+static char *rna_MeshEdge_path(const PointerRNA *ptr)
 {
   return BLI_sprintfN("edges[%d]", (int)((MEdge *)ptr->data - rna_mesh(ptr)->medge));
 }
 
-static char *rna_MeshLoop_path(PointerRNA *ptr)
+static char *rna_MeshLoop_path(const PointerRNA *ptr)
 {
   return BLI_sprintfN("loops[%d]", (int)((MLoop *)ptr->data - rna_mesh(ptr)->mloop));
 }
 
-static char *rna_MeshVertex_path(PointerRNA *ptr)
+static char *rna_MeshVertex_path(const PointerRNA *ptr)
 {
   return BLI_sprintfN("vertices[%d]", (int)((MVert *)ptr->data - rna_mesh(ptr)->mvert));
 }
 
-static char *rna_VertCustomData_data_path(PointerRNA *ptr, const char *collection, int type)
+static char *rna_VertCustomData_data_path(const PointerRNA *ptr, const char *collection, int type)
 {
-  CustomDataLayer *cdl;
-  Mesh *me = rna_mesh(ptr);
-  CustomData *vdata = rna_mesh_vdata(ptr);
+  const CustomDataLayer *cdl;
+  const Mesh *me = rna_mesh(ptr);
+  const CustomData *vdata = rna_mesh_vdata(ptr);
   int a, b, totvert = (me->edit_mesh) ? 0 : me->totvert;
 
   for (cdl = vdata->layers, a = 0; a < vdata->totlayer; cdl++, a++) {
@@ -1247,11 +1247,11 @@ static char *rna_VertCustomData_data_path(PointerRNA *ptr, const char *collectio
   return NULL;
 }
 
-static char *rna_PolyCustomData_data_path(PointerRNA *ptr, const char *collection, int type)
+static char *rna_PolyCustomData_data_path(const PointerRNA *ptr, const char *collection, int type)
 {
-  CustomDataLayer *cdl;
-  Mesh *me = rna_mesh(ptr);
-  CustomData *pdata = rna_mesh_pdata(ptr);
+  const CustomDataLayer *cdl;
+  const Mesh *me = rna_mesh(ptr);
+  const CustomData *pdata = rna_mesh_pdata(ptr);
   int a, b, totpoly = (me->edit_mesh) ? 0 : me->totpoly;
 
   for (cdl = pdata->layers, a = 0; a < pdata->totlayer; cdl++, a++) {
@@ -1268,11 +1268,11 @@ static char *rna_PolyCustomData_data_path(PointerRNA *ptr, const char *collectio
   return NULL;
 }
 
-static char *rna_LoopCustomData_data_path(PointerRNA *ptr, const char *collection, int type)
+static char *rna_LoopCustomData_data_path(const PointerRNA *ptr, const char *collection, int type)
 {
-  CustomDataLayer *cdl;
-  Mesh *me = rna_mesh(ptr);
-  CustomData *ldata = rna_mesh_ldata(ptr);
+  const CustomDataLayer *cdl;
+  const Mesh *me = rna_mesh(ptr);
+  const CustomData *ldata = rna_mesh_ldata(ptr);
   int a, b, totloop = (me->edit_mesh) ? 0 : me->totloop;
 
   for (cdl = ldata->layers, a = 0; a < ldata->totlayer; cdl++, a++) {
@@ -1315,58 +1315,58 @@ static int rna_Mesh_poly_normals_length(PointerRNA *ptr)
   return mesh->totpoly;
 }
 
-static char *rna_MeshUVLoop_path(PointerRNA *ptr)
+static char *rna_MeshUVLoop_path(const PointerRNA *ptr)
 {
   return rna_LoopCustomData_data_path(ptr, "uv_layers", CD_MLOOPUV);
 }
 
-static char *rna_MeshLoopColorLayer_path(PointerRNA *ptr)
+static char *rna_MeshLoopColorLayer_path(const PointerRNA *ptr)
 {
-  CustomDataLayer *cdl = ptr->data;
+  const CustomDataLayer *cdl = ptr->data;
   char name_esc[sizeof(cdl->name) * 2];
   BLI_str_escape(name_esc, cdl->name, sizeof(name_esc));
   return BLI_sprintfN("vertex_colors[\"%s\"]", name_esc);
 }
 
-static char *rna_MeshColor_path(PointerRNA *ptr)
+static char *rna_MeshColor_path(const PointerRNA *ptr)
 {
   return rna_LoopCustomData_data_path(ptr, "vertex_colors", CD_PROP_BYTE_COLOR);
 }
 
-static char *rna_MeshVertColorLayer_path(PointerRNA *ptr)
+static char *rna_MeshVertColorLayer_path(const PointerRNA *ptr)
 {
-  CustomDataLayer *cdl = ptr->data;
+  const CustomDataLayer *cdl = ptr->data;
   char name_esc[sizeof(cdl->name) * 2];
   BLI_str_escape(name_esc, cdl->name, sizeof(name_esc));
   return BLI_sprintfN("sculpt_vertex_colors[\"%s\"]", name_esc);
 }
 
-static char *rna_MeshVertColor_path(PointerRNA *ptr)
+static char *rna_MeshVertColor_path(const PointerRNA *ptr)
 {
   return rna_VertCustomData_data_path(ptr, "sculpt_vertex_colors", CD_PROP_COLOR);
 }
 
 /**** Float Property Layer API ****/
-static char *rna_MeshVertexFloatPropertyLayer_path(PointerRNA *ptr)
+static char *rna_MeshVertexFloatPropertyLayer_path(const PointerRNA *ptr)
 {
-  CustomDataLayer *cdl = ptr->data;
+  const CustomDataLayer *cdl = ptr->data;
   char name_esc[sizeof(cdl->name) * 2];
   BLI_str_escape(name_esc, cdl->name, sizeof(name_esc));
   return BLI_sprintfN("vertex_float_layers[\"%s\"]", name_esc);
 }
-static char *rna_MeshPolygonFloatPropertyLayer_path(PointerRNA *ptr)
+static char *rna_MeshPolygonFloatPropertyLayer_path(const PointerRNA *ptr)
 {
-  CustomDataLayer *cdl = ptr->data;
+  const CustomDataLayer *cdl = ptr->data;
   char name_esc[sizeof(cdl->name) * 2];
   BLI_str_escape(name_esc, cdl->name, sizeof(name_esc));
   return BLI_sprintfN("polygon_float_layers[\"%s\"]", name_esc);
 }
 
-static char *rna_MeshVertexFloatProperty_path(PointerRNA *ptr)
+static char *rna_MeshVertexFloatProperty_path(const PointerRNA *ptr)
 {
   return rna_VertCustomData_data_path(ptr, "vertex_layers_float", CD_PROP_FLOAT);
 }
-static char *rna_MeshPolygonFloatProperty_path(PointerRNA *ptr)
+static char *rna_MeshPolygonFloatProperty_path(const PointerRNA *ptr)
 {
   return rna_PolyCustomData_data_path(ptr, "polygon_layers_float", CD_PROP_FLOAT);
 }
@@ -1398,26 +1398,26 @@ static int rna_MeshPolygonFloatPropertyLayer_data_length(PointerRNA *ptr)
 }
 
 /**** Int Property Layer API ****/
-static char *rna_MeshVertexIntPropertyLayer_path(PointerRNA *ptr)
+static char *rna_MeshVertexIntPropertyLayer_path(const PointerRNA *ptr)
 {
-  CustomDataLayer *cdl = ptr->data;
+  const CustomDataLayer *cdl = ptr->data;
   char name_esc[sizeof(cdl->name) * 2];
   BLI_str_escape(name_esc, cdl->name, sizeof(name_esc));
   return BLI_sprintfN("vertex_int_layers[\"%s\"]", name_esc);
 }
-static char *rna_MeshPolygonIntPropertyLayer_path(PointerRNA *ptr)
+static char *rna_MeshPolygonIntPropertyLayer_path(const PointerRNA *ptr)
 {
-  CustomDataLayer *cdl = ptr->data;
+  const CustomDataLayer *cdl = ptr->data;
   char name_esc[sizeof(cdl->name) * 2];
   BLI_str_escape(name_esc, cdl->name, sizeof(name_esc));
   return BLI_sprintfN("polygon_int_layers[\"%s\"]", name_esc);
 }
 
-static char *rna_MeshVertexIntProperty_path(PointerRNA *ptr)
+static char *rna_MeshVertexIntProperty_path(const PointerRNA *ptr)
 {
   return rna_VertCustomData_data_path(ptr, "vertex_layers_int", CD_PROP_INT32);
 }
-static char *rna_MeshPolygonIntProperty_path(PointerRNA *ptr)
+static char *rna_MeshPolygonIntProperty_path(const PointerRNA *ptr)
 {
   return rna_PolyCustomData_data_path(ptr, "polygon_layers_int", CD_PROP_INT32);
 }
@@ -1449,26 +1449,26 @@ static int rna_MeshPolygonIntPropertyLayer_data_length(PointerRNA *ptr)
 }
 
 /**** String Property Layer API ****/
-static char *rna_MeshVertexStringPropertyLayer_path(PointerRNA *ptr)
+static char *rna_MeshVertexStringPropertyLayer_path(const PointerRNA *ptr)
 {
-  CustomDataLayer *cdl = ptr->data;
+  const CustomDataLayer *cdl = ptr->data;
   char name_esc[sizeof(cdl->name) * 2];
   BLI_str_escape(name_esc, cdl->name, sizeof(name_esc));
   return BLI_sprintfN("vertex_string_layers[\"%s\"]", name_esc);
 }
-static char *rna_MeshPolygonStringPropertyLayer_path(PointerRNA *ptr)
+static char *rna_MeshPolygonStringPropertyLayer_path(const PointerRNA *ptr)
 {
-  CustomDataLayer *cdl = ptr->data;
+  const CustomDataLayer *cdl = ptr->data;
   char name_esc[sizeof(cdl->name) * 2];
   BLI_str_escape(name_esc, cdl->name, sizeof(name_esc));
   return BLI_sprintfN("polygon_string_layers[\"%s\"]", name_esc);
 }
 
-static char *rna_MeshVertexStringProperty_path(PointerRNA *ptr)
+static char *rna_MeshVertexStringProperty_path(const PointerRNA *ptr)
 {
   return rna_VertCustomData_data_path(ptr, "vertex_layers_string", CD_PROP_STRING);
 }
-static char *rna_MeshPolygonStringProperty_path(PointerRNA *ptr)
+static char *rna_MeshPolygonStringProperty_path(const PointerRNA *ptr)
 {
   return rna_PolyCustomData_data_path(ptr, "polygon_layers_string", CD_PROP_STRING);
 }
@@ -1519,7 +1519,7 @@ void rna_MeshStringProperty_s_set(PointerRNA *ptr, const char *value)
   BLI_strncpy(ms->s, value, sizeof(ms->s));
 }
 
-static char *rna_MeshFaceMap_path(PointerRNA *ptr)
+static char *rna_MeshFaceMap_path(const PointerRNA *ptr)
 {
   return rna_PolyCustomData_data_path(ptr, "face_maps", CD_FACEMAP);
 }
diff --git a/source/blender/makesrna/intern/rna_meta.c b/source/blender/makesrna/intern/rna_meta.c
index f160388c5d2..e6cf743e167 100644
--- a/source/blender/makesrna/intern/rna_meta.c
+++ b/source/blender/makesrna/intern/rna_meta.c
@@ -156,10 +156,10 @@ static bool rna_Meta_is_editmode_get(PointerRNA *ptr)
   return (mb->editelems != NULL);
 }
 
-static char *rna_MetaElement_path(PointerRNA *ptr)
+static char *rna_MetaElement_path(const PointerRNA *ptr)
 {
-  MetaBall *mb = (MetaBall *)ptr->owner_id;
-  MetaElem *ml = ptr->data;
+  const MetaBall *mb = (MetaBall *)ptr->owner_id;
+  const MetaElem *ml = ptr->data;
   int index = -1;
 
   if (mb->editelems) {
diff --git a/source/blender/makesrna/intern/rna_modifier.c b/source/blender/makesrna/intern/rna_modifier.c
index 6dd7fe53774..992e306b2bb 100644
--- a/source/blender/makesrna/intern/rna_modifier.c
+++ b/source/blender/makesrna/intern/rna_modifier.c
@@ -722,9 +722,9 @@ static void rna_Modifier_name_set(PointerRNA *ptr, const char *value)
   BKE_animdata_fix_paths_rename_all(NULL, "modifiers", oldname, md->name);
 }
 
-static char *rna_Modifier_path(PointerRNA *ptr)
+static char *rna_Modifier_path(const PointerRNA *ptr)
 {
-  ModifierData *md = ptr->data;
+  const ModifierData *md = ptr->data;
   char name_esc[sizeof(md->name) * 2];
 
   BLI_str_escape(name_esc, md->name, sizeof(name_esc));
@@ -947,10 +947,10 @@ static void rna_HookModifier_subtarget_set(PointerRNA *ptr, const char *value)
   BKE_object_modifier_hook_reset(owner, hmd);
 }
 
-static int rna_HookModifier_vertex_indices_get_length(PointerRNA *ptr,
+static int rna_HookModifier_vertex_indices_get_length(const PointerRNA *ptr,
                                                       int length[RNA_MAX_ARRAY_DIMENSION])
 {
-  HookModifierData *hmd = ptr->data;
+  const HookModifierData *hmd = ptr->data;
   int indexar_num = hmd->indexar ? hmd->indexar_num : 0;
   return (length[0] = indexar_num);
 }
diff --git a/source/blender/makesrna/intern/rna_nla.c b/source/blender/makesrna/intern/rna_nla.c
index f8a35246581..8aa87c1bcaa 100644
--- a/source/blender/makesrna/intern/rna_nla.c
+++ b/source/blender/makesrna/intern/rna_nla.c
@@ -57,7 +57,7 @@ static void rna_NlaStrip_name_set(PointerRNA *ptr, const char *value)
   }
 }
 
-static char *rna_NlaStrip_path(PointerRNA *ptr)
+static char *rna_NlaStrip_path(const PointerRNA *ptr)
 {
   NlaStrip *strip = (NlaStrip *)ptr->data;
   AnimData *adt = BKE_animdata_from_id(ptr->owner_id);
diff --git a/source/blender/makesrna/intern/rna_nodetree.c b/source/blender/makesrna/intern/rna_nodetree.c
index 9b9afadbd05..b9da7a2435e 100644
--- a/source/blender/makesrna/intern/rna_nodetree.c
+++ b/source/blender/makesrna/intern/rna_nodetree.c
@@ -1598,16 +1598,16 @@ static StructRNA *rna_Node_refine(struct PointerRNA *ptr)
   }
 }
 
-static char *rna_Node_path(PointerRNA *ptr)
+static char *rna_Node_path(const PointerRNA *ptr)
 {
-  bNode *node = (bNode *)ptr->data;
+  const bNode *node = (bNode *)ptr->data;
   char name_esc[sizeof(node->name) * 2];
 
   BLI_str_escape(name_esc, node->name, sizeof(name_esc));
   return BLI_sprintfN("nodes[\"%s\"]", name_esc);
 }
 
-char *rna_Node_ImageUser_path(PointerRNA *ptr)
+char *rna_Node_ImageUser_path(const PointerRNA *ptr)
 {
   bNodeTree *ntree = (bNodeTree *)ptr->owner_id;
   bNode *node;
@@ -2756,7 +2756,7 @@ static StructRNA *rna_NodeSocket_refine(PointerRNA *ptr)
   }
 }
 
-static char *rna_NodeSocket_path(PointerRNA *ptr)
+static char *rna_NodeSocket_path(const PointerRNA *ptr)
 {
   bNodeTree *ntree = (bNodeTree *)ptr->owner_id;
   bNodeSocket *sock = (bNodeSocket *)ptr->data;
@@ -3070,10 +3070,10 @@ static StructRNA *rna_NodeSocketInterface_refine(PointerRNA *ptr)
   }
 }
 
-static char *rna_NodeSocketInterface_path(PointerRNA *ptr)
+static char *rna_NodeSocketInterface_path(const PointerRNA *ptr)
 {
-  bNodeTree *ntree = (bNodeTree *)ptr->owner_id;
-  bNodeSocket *sock = (bNodeSocket *)ptr->data;
+  const bNodeTree *ntree = (bNodeTree *)ptr->owner_id;
+  const bNodeSocket *sock = (bNodeSocket *)ptr->data;
   int socketindex;
 
   socketindex = BLI_findindex(&ntree->inputs, sock);
diff --git a/source/blender/makesrna/intern/rna_object.c b/source/blender/makesrna/intern/rna_object.c
index 98fc6633f78..b192a385546 100644
--- a/source/blender/makesrna/intern/rna_object.c
+++ b/source/blender/makesrna/intern/rna_object.c
@@ -1320,12 +1320,17 @@ static int rna_Object_rotation_4d_editable(PointerRNA *ptr, int index)
   return PROP_EDITABLE;
 }
 
-static int rna_MaterialSlot_index(PointerRNA *ptr)
+static int rna_MaterialSlot_index(const PointerRNA *ptr)
 {
   /* There is an offset, so that `ptr->data` is not null and unique across IDs. */
   return (uintptr_t)ptr->data - (uintptr_t)ptr->owner_id;
 }
 
+static int rna_MaterialSlot_index_get(PointerRNA *ptr)
+{
+  return rna_MaterialSlot_index(ptr);
+}
+
 static int rna_MaterialSlot_material_editable(PointerRNA *ptr, const char **UNUSED(r_info))
 {
   Object *ob = (Object *)ptr->owner_id;
@@ -1451,7 +1456,7 @@ static void rna_MaterialSlot_update(Main *bmain, Scene *scene, PointerRNA *ptr)
   DEG_relations_tag_update(bmain);
 }
 
-static char *rna_MaterialSlot_path(PointerRNA *ptr)
+static char *rna_MaterialSlot_path(const PointerRNA *ptr)
 {
   int index = rna_MaterialSlot_index(ptr);
   return BLI_sprintfN("material_slots[%d]", index);
@@ -1504,7 +1509,7 @@ static PointerRNA rna_Object_display_get(PointerRNA *ptr)
   return rna_pointer_inherit_refine(ptr, &RNA_ObjectDisplay, ptr->data);
 }
 
-static char *rna_ObjectDisplay_path(PointerRNA *UNUSED(ptr))
+static char *rna_ObjectDisplay_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("display");
 }
@@ -2484,7 +2489,7 @@ static void rna_def_material_slot(BlenderRNA *brna)
 
   prop = RNA_def_property(srna, "slot_index", PROP_INT, PROP_NONE);
   RNA_def_property_clear_flag(prop, PROP_EDITABLE);
-  RNA_def_property_int_funcs(prop, "rna_MaterialSlot_index", NULL, NULL);
+  RNA_def_property_int_funcs(prop, "rna_MaterialSlot_index_get", NULL, NULL);
 
   prop = RNA_def_property(srna, "name", PROP_STRING, PROP_NONE);
   RNA_def_property_string_funcs(
diff --git a/source/blender/makesrna/intern/rna_object_force.c b/source/blender/makesrna/intern/rna_object_force.c
index addc8ac0c6c..2ed539aa511 100644
--- a/source/blender/makesrna/intern/rna_object_force.c
+++ b/source/blender/makesrna/intern/rna_object_force.c
@@ -130,7 +130,7 @@ static bool rna_Cache_get_valid_owner_ID(PointerRNA *ptr, Object **ob, Scene **s
   return (*ob != NULL || *scene != NULL);
 }
 
-static char *rna_PointCache_path(PointerRNA *ptr)
+static char *rna_PointCache_path(const PointerRNA *ptr)
 {
   ModifierData *md;
   Object *ob = (Object *)ptr->owner_id;
@@ -443,7 +443,7 @@ int rna_Cache_info_length(PointerRNA *ptr)
   return (int)strlen(cache->info);
 }
 
-static char *rna_CollisionSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_CollisionSettings_path(const PointerRNA *UNUSED(ptr))
 {
   /* both methods work ok, but return the shorter path */
 #  if 0
@@ -619,17 +619,17 @@ static void rna_SoftBodySettings_spring_vgroup_set(PointerRNA *ptr, const char *
   rna_object_vgroup_name_set(ptr, value, sb->namedVG_Spring_K, sizeof(sb->namedVG_Spring_K));
 }
 
-static char *rna_SoftBodySettings_path(PointerRNA *ptr)
+static char *rna_SoftBodySettings_path(const PointerRNA *ptr)
 {
-  Object *ob = (Object *)ptr->owner_id;
-  ModifierData *md = (ModifierData *)BKE_modifiers_findby_type(ob, eModifierType_Softbody);
+  const Object *ob = (Object *)ptr->owner_id;
+  const ModifierData *md = BKE_modifiers_findby_type(ob, eModifierType_Softbody);
   char name_esc[sizeof(md->name) * 2];
 
   BLI_str_escape(name_esc, md->name, sizeof(name_esc));
   return BLI_sprintfN("modifiers[\"%s\"].settings", name_esc);
 }
 
-static int particle_id_check(PointerRNA *ptr)
+static int particle_id_check(const PointerRNA *ptr)
 {
   ID *id = ptr->owner_id;
 
@@ -731,7 +731,7 @@ static void rna_FieldSettings_dependency_update(Main *bmain, Scene *scene, Point
   }
 }
 
-static char *rna_FieldSettings_path(PointerRNA *ptr)
+static char *rna_FieldSettings_path(const PointerRNA *ptr)
 {
   PartDeflect *pd = (PartDeflect *)ptr->data;
 
@@ -787,7 +787,7 @@ static void rna_EffectorWeight_dependency_update(Main *bmain,
   WM_main_add_notifier(NC_OBJECT | ND_DRAW, NULL);
 }
 
-static char *rna_EffectorWeight_path(PointerRNA *ptr)
+static char *rna_EffectorWeight_path(const PointerRNA *ptr)
 {
   EffectorWeights *ew = (EffectorWeights *)ptr->data;
   /* Check through all possible places the settings can be to find the right one */
diff --git a/source/blender/makesrna/intern/rna_particle.c b/source/blender/makesrna/intern/rna_particle.c
index 8a024fdcfc2..a67b0f7c8e6 100644
--- a/source/blender/makesrna/intern/rna_particle.c
+++ b/source/blender/makesrna/intern/rna_particle.c
@@ -1208,19 +1208,19 @@ static int rna_ParticleTarget_name_length(PointerRNA *ptr)
   return strlen(tstr);
 }
 
-static int particle_id_check(PointerRNA *ptr)
+static int particle_id_check(const PointerRNA *ptr)
 {
-  ID *id = ptr->owner_id;
+  const ID *id = ptr->owner_id;
 
   return (GS(id->name) == ID_PA);
 }
 
-static char *rna_SPHFluidSettings_path(PointerRNA *ptr)
+static char *rna_SPHFluidSettings_path(const PointerRNA *ptr)
 {
-  SPHFluidSettings *fluid = (SPHFluidSettings *)ptr->data;
+  const SPHFluidSettings *fluid = (SPHFluidSettings *)ptr->data;
 
   if (particle_id_check(ptr)) {
-    ParticleSettings *part = (ParticleSettings *)ptr->owner_id;
+    const ParticleSettings *part = (ParticleSettings *)ptr->owner_id;
 
     if (part->fluid == fluid) {
       return BLI_strdup("fluid");
@@ -1463,9 +1463,9 @@ static void psys_vg_name_set__internal(PointerRNA *ptr, const char *value, int i
   }
 }
 
-static char *rna_ParticleSystem_path(PointerRNA *ptr)
+static char *rna_ParticleSystem_path(const PointerRNA *ptr)
 {
-  ParticleSystem *psys = (ParticleSystem *)ptr->data;
+  const ParticleSystem *psys = (ParticleSystem *)ptr->data;
   char name_esc[sizeof(psys->name) * 2];
 
   BLI_str_escape(name_esc, psys->name, sizeof(name_esc));
diff --git a/source/blender/makesrna/intern/rna_pointcloud.c b/source/blender/makesrna/intern/rna_pointcloud.c
index 075d660ba2b..4c5dcd5a587 100644
--- a/source/blender/makesrna/intern/rna_pointcloud.c
+++ b/source/blender/makesrna/intern/rna_pointcloud.c
@@ -27,18 +27,23 @@
 #  include "WM_api.h"
 #  include "WM_types.h"
 
-static PointCloud *rna_pointcloud(PointerRNA *ptr)
+static PointCloud *rna_pointcloud(const PointerRNA *ptr)
 {
   return (PointCloud *)ptr->owner_id;
 }
 
-static int rna_Point_index_get(PointerRNA *ptr)
+static int rna_Point_index_get_const(const PointerRNA *ptr)
 {
   const PointCloud *pointcloud = rna_pointcloud(ptr);
   const float(*co)[3] = ptr->data;
   return (int)(co - pointcloud->co);
 }
 
+static int rna_Point_index_get(PointerRNA *ptr)
+{
+  return rna_Point_index_get_const(ptr);
+}
+
 static void rna_Point_location_get(PointerRNA *ptr, float value[3])
 {
   copy_v3_v3(value, (const float *)ptr->data);
@@ -69,9 +74,9 @@ static void rna_Point_radius_set(PointerRNA *ptr, float value)
   pointcloud->radius[co - pointcloud->co] = value;
 }
 
-static char *rna_Point_path(PointerRNA *ptr)
+static char *rna_Point_path(const PointerRNA *ptr)
 {
-  return BLI_sprintfN("points[%d]", rna_Point_index_get(ptr));
+  return BLI_sprintfN("points[%d]", rna_Point_index_get_const(ptr));
 }
 
 static void rna_PointCloud_update_data(struct Main *UNUSED(bmain),
diff --git a/source/blender/makesrna/intern/rna_pose.c b/source/blender/makesrna/intern/rna_pose.c
index a80e9573657..4108baca2fa 100644
--- a/source/blender/makesrna/intern/rna_pose.c
+++ b/source/blender/makesrna/intern/rna_pose.c
@@ -108,14 +108,14 @@ static void rna_Pose_IK_update(Main *UNUSED(bmain), Scene *UNUSED(scene), Pointe
   BIK_clear_data(ob->pose);
 }
 
-static char *rna_Pose_path(PointerRNA *UNUSED(ptr))
+static char *rna_Pose_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("pose");
 }
 
-static char *rna_PoseBone_path(PointerRNA *ptr)
+static char *rna_PoseBone_path(const PointerRNA *ptr)
 {
-  bPoseChannel *pchan = ptr->data;
+  const bPoseChannel *pchan = ptr->data;
   char name_esc[sizeof(pchan->name) * 2];
 
   BLI_str_escape(name_esc, pchan->name, sizeof(name_esc));
diff --git a/source/blender/makesrna/intern/rna_render.c b/source/blender/makesrna/intern/rna_render.c
index 997c110134d..11a7be69f68 100644
--- a/source/blender/makesrna/intern/rna_render.c
+++ b/source/blender/makesrna/intern/rna_render.c
@@ -483,9 +483,10 @@ static void rna_RenderLayer_passes_begin(CollectionPropertyIterator *iter, Point
   rna_iterator_listbase_begin(iter, &rl->passes, NULL);
 }
 
-static int rna_RenderPass_rect_get_length(PointerRNA *ptr, int length[RNA_MAX_ARRAY_DIMENSION])
+static int rna_RenderPass_rect_get_length(const PointerRNA *ptr,
+                                          int length[RNA_MAX_ARRAY_DIMENSION])
 {
-  RenderPass *rpass = (RenderPass *)ptr->data;
+  const RenderPass *rpass = (RenderPass *)ptr->data;
 
   length[0] = rpass->rectx * rpass->recty;
   length[1] = rpass->channels;
diff --git a/source/blender/makesrna/intern/rna_rigidbody.c b/source/blender/makesrna/intern/rna_rigidbody.c
index c1012f67c5a..0c1fd8cab3c 100644
--- a/source/blender/makesrna/intern/rna_rigidbody.c
+++ b/source/blender/makesrna/intern/rna_rigidbody.c
@@ -148,7 +148,7 @@ static void rna_RigidBodyWorld_reset(Main *UNUSED(bmain), Scene *UNUSED(scene),
   BKE_rigidbody_cache_reset(rbw);
 }
 
-static char *rna_RigidBodyWorld_path(PointerRNA *UNUSED(ptr))
+static char *rna_RigidBodyWorld_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("rigidbody_world");
 }
@@ -240,7 +240,7 @@ static void rna_RigidBodyOb_mesh_source_update(Main *bmain, Scene *scene, Pointe
   WM_main_add_notifier(NC_OBJECT | ND_DRAW, ob);
 }
 
-static char *rna_RigidBodyOb_path(PointerRNA *UNUSED(ptr))
+static char *rna_RigidBodyOb_path(const PointerRNA *UNUSED(ptr))
 {
   /* NOTE: this hardcoded path should work as long as only Objects have this */
   return BLI_strdup("rigid_body");
@@ -432,7 +432,7 @@ static void rna_RigidBodyOb_angular_damping_set(PointerRNA *ptr, float value)
 #  endif
 }
 
-static char *rna_RigidBodyCon_path(PointerRNA *UNUSED(ptr))
+static char *rna_RigidBodyCon_path(const PointerRNA *UNUSED(ptr))
 {
   /* NOTE: this hardcoded path should work as long as only Objects have this */
   return BLI_strdup("rigid_body_constraint");
diff --git a/source/blender/makesrna/intern/rna_rna.c b/source/blender/makesrna/intern/rna_rna.c
index d540b51a585..ae67de9228c 100644
--- a/source/blender/makesrna/intern/rna_rna.c
+++ b/source/blender/makesrna/intern/rna_rna.c
@@ -721,7 +721,7 @@ static int rna_IntProperty_default_get(PointerRNA *ptr)
   return ((IntPropertyRNA *)prop)->defaultvalue;
 }
 /* int/float/bool */
-static int rna_NumberProperty_default_array_get_length(PointerRNA *ptr,
+static int rna_NumberProperty_default_array_get_length(const PointerRNA *ptr,
                                                        int length[RNA_MAX_ARRAY_DIMENSION])
 {
   PropertyRNA *prop = (PropertyRNA *)ptr->data;
diff --git a/source/blender/makesrna/intern/rna_scene.c b/source/blender/makesrna/intern/rna_scene.c
index 63a68d04a97..0e423b71f1d 100644
--- a/source/blender/makesrna/intern/rna_scene.c
+++ b/source/blender/makesrna/intern/rna_scene.c
@@ -1100,12 +1100,12 @@ static void rna_Scene_all_keyingsets_next(CollectionPropertyIterator *iter)
   iter->valid = (internal->link != NULL);
 }
 
-static char *rna_SceneEEVEE_path(PointerRNA *UNUSED(ptr))
+static char *rna_SceneEEVEE_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("eevee");
 }
 
-static char *rna_SceneGpencil_path(PointerRNA *UNUSED(ptr))
+static char *rna_SceneGpencil_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("grease_pencil_settings");
 }
@@ -1129,17 +1129,17 @@ static void rna_RenderSettings_stereoViews_begin(CollectionPropertyIterator *ite
   rna_iterator_listbase_begin(iter, &rd->views, rna_RenderSettings_stereoViews_skip);
 }
 
-static char *rna_RenderSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_RenderSettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("render");
 }
 
-static char *rna_BakeSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_BakeSettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("render.bake");
 }
 
-static char *rna_ImageFormatSettings_path(PointerRNA *ptr)
+static char *rna_ImageFormatSettings_path(const PointerRNA *ptr)
 {
   ImageFormatData *imf = (ImageFormatData *)ptr->data;
   ID *id = ptr->owner_id;
@@ -1787,10 +1787,11 @@ void rna_ViewLayer_pass_update(Main *bmain, Scene *activescene, PointerRNA *ptr)
   rna_Scene_glsl_update(bmain, activescene, ptr);
 }
 
-static char *rna_ViewLayerEEVEE_path(PointerRNA *ptr)
+static char *rna_ViewLayerEEVEE_path(const PointerRNA *ptr)
 {
-  ViewLayerEEVEE *view_layer_eevee = (ViewLayerEEVEE *)ptr->data;
-  ViewLayer *view_layer = (ViewLayer *)((uint8_t *)view_layer_eevee - offsetof(ViewLayer, eevee));
+  const ViewLayerEEVEE *view_layer_eevee = (ViewLayerEEVEE *)ptr->data;
+  const ViewLayer *view_layer = (ViewLayer *)((uint8_t *)view_layer_eevee -
+                                              offsetof(ViewLayer, eevee));
   char rna_path[sizeof(view_layer->name) * 3];
 
   const size_t view_layer_path_len = rna_ViewLayer_path_buffer_get(
@@ -1801,9 +1802,9 @@ static char *rna_ViewLayerEEVEE_path(PointerRNA *ptr)
   return BLI_strdup(rna_path);
 }
 
-static char *rna_SceneRenderView_path(PointerRNA *ptr)
+static char *rna_SceneRenderView_path(const PointerRNA *ptr)
 {
-  SceneRenderView *srv = (SceneRenderView *)ptr->data;
+  const SceneRenderView *srv = (SceneRenderView *)ptr->data;
   char srv_name_esc[sizeof(srv->name) * 2];
   BLI_str_escape(srv_name_esc, srv->name, sizeof(srv_name_esc));
   return BLI_sprintfN("render.views[\"%s\"]", srv_name_esc);
@@ -2071,10 +2072,10 @@ static void rna_View3DCursor_matrix_set(PointerRNA *ptr, const float *values)
   BKE_scene_cursor_from_mat4(cursor, unit_mat, false);
 }
 
-static char *rna_TransformOrientationSlot_path(PointerRNA *ptr)
+static char *rna_TransformOrientationSlot_path(const PointerRNA *ptr)
 {
-  Scene *scene = (Scene *)ptr->owner_id;
-  TransformOrientationSlot *orientation_slot = ptr->data;
+  const Scene *scene = (Scene *)ptr->owner_id;
+  const TransformOrientationSlot *orientation_slot = ptr->data;
 
   if (!ELEM(NULL, scene, orientation_slot)) {
     for (int i = 0; i < ARRAY_SIZE(scene->orientation_slots); i++) {
@@ -2089,7 +2090,7 @@ static char *rna_TransformOrientationSlot_path(PointerRNA *ptr)
   return BLI_strdup("transform_orientation_slots[0]");
 }
 
-static char *rna_View3DCursor_path(PointerRNA *UNUSED(ptr))
+static char *rna_View3DCursor_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("cursor");
 }
@@ -2188,17 +2189,17 @@ static void rna_UnifiedPaintSettings_radius_update(bContext *C, PointerRNA *ptr)
   rna_UnifiedPaintSettings_update(C, ptr);
 }
 
-static char *rna_UnifiedPaintSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_UnifiedPaintSettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.unified_paint_settings");
 }
 
-static char *rna_CurvePaintSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_CurvePaintSettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.curve_paint_settings");
 }
 
-static char *rna_SequencerToolSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_SequencerToolSettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.sequencer_tool_settings");
 }
@@ -2222,7 +2223,7 @@ static void rna_EditMesh_update(bContext *C, PointerRNA *UNUSED(ptr))
   }
 }
 
-static char *rna_MeshStatVis_path(PointerRNA *UNUSED(ptr))
+static char *rna_MeshStatVis_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.statvis");
 }
@@ -2260,7 +2261,7 @@ static void rna_SceneSequencer_update(Main *UNUSED(bmain), Scene *UNUSED(scene),
   SEQ_cache_cleanup((Scene *)ptr->owner_id);
 }
 
-static char *rna_ToolSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_ToolSettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings");
 }
@@ -2701,12 +2702,12 @@ static void rna_UnitSettings_system_update(Main *UNUSED(bmain),
   }
 }
 
-static char *rna_UnitSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_UnitSettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("unit_settings");
 }
 
-static char *rna_FFmpegSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_FFmpegSettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("render.ffmpeg");
 }
diff --git a/source/blender/makesrna/intern/rna_sculpt_paint.c b/source/blender/makesrna/intern/rna_sculpt_paint.c
index 017e8bde7a1..ab5e4c2f0d5 100644
--- a/source/blender/makesrna/intern/rna_sculpt_paint.c
+++ b/source/blender/makesrna/intern/rna_sculpt_paint.c
@@ -259,7 +259,7 @@ static bool rna_ParticleEdit_hair_get(PointerRNA *ptr)
   return 0;
 }
 
-static char *rna_ParticleEdit_path(PointerRNA *UNUSED(ptr))
+static char *rna_ParticleEdit_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.particle_edit");
 }
@@ -403,15 +403,15 @@ static void rna_Sculpt_ShowMask_update(bContext *C, PointerRNA *UNUSED(ptr))
   WM_main_add_notifier(NC_OBJECT | ND_MODIFIER, object);
 }
 
-static char *rna_Sculpt_path(PointerRNA *UNUSED(ptr))
+static char *rna_Sculpt_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.sculpt");
 }
 
-static char *rna_VertexPaint_path(PointerRNA *ptr)
+static char *rna_VertexPaint_path(const PointerRNA *ptr)
 {
-  Scene *scene = (Scene *)ptr->owner_id;
-  ToolSettings *ts = scene->toolsettings;
+  const Scene *scene = (Scene *)ptr->owner_id;
+  const ToolSettings *ts = scene->toolsettings;
   if (ptr->data == ts->vpaint) {
     return BLI_strdup("tool_settings.vertex_paint");
   }
@@ -420,47 +420,47 @@ static char *rna_VertexPaint_path(PointerRNA *ptr)
   }
 }
 
-static char *rna_ImagePaintSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_ImagePaintSettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.image_paint");
 }
 
-static char *rna_PaintModeSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_PaintModeSettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.paint_mode");
 }
 
-static char *rna_UvSculpt_path(PointerRNA *UNUSED(ptr))
+static char *rna_UvSculpt_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.uv_sculpt");
 }
 
-static char *rna_CurvesSculpt_path(PointerRNA *UNUSED(ptr))
+static char *rna_CurvesSculpt_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.curves_sculpt");
 }
 
-static char *rna_GpPaint_path(PointerRNA *UNUSED(ptr))
+static char *rna_GpPaint_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.gpencil_paint");
 }
 
-static char *rna_GpVertexPaint_path(PointerRNA *UNUSED(ptr))
+static char *rna_GpVertexPaint_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.gpencil_vertex_paint");
 }
 
-static char *rna_GpSculptPaint_path(PointerRNA *UNUSED(ptr))
+static char *rna_GpSculptPaint_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.gpencil_sculpt_paint");
 }
 
-static char *rna_GpWeightPaint_path(PointerRNA *UNUSED(ptr))
+static char *rna_GpWeightPaint_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.gpencil_weight_paint");
 }
 
-static char *rna_ParticleBrush_path(PointerRNA *UNUSED(ptr))
+static char *rna_ParticleBrush_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.particle_edit.brush");
 }
@@ -578,12 +578,12 @@ static bool rna_ImaPaint_detect_data(ImagePaintSettings *imapaint)
   return imapaint->missing_data == 0;
 }
 
-static char *rna_GPencilSculptSettings_path(PointerRNA *UNUSED(ptr))
+static char *rna_GPencilSculptSettings_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.gpencil_sculpt");
 }
 
-static char *rna_GPencilSculptGuide_path(PointerRNA *UNUSED(ptr))
+static char *rna_GPencilSculptGuide_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tool_settings.gpencil_sculpt.guide");
 }
diff --git a/source/blender/makesrna/intern/rna_sequencer.c b/source/blender/makesrna/intern/rna_sequencer.c
index 1e90d6f75b5..5d583d3edcb 100644
--- a/source/blender/makesrna/intern/rna_sequencer.c
+++ b/source/blender/makesrna/intern/rna_sequencer.c
@@ -504,7 +504,7 @@ static Sequence *sequence_get_by_transform(Editing *ed, StripTransform *transfor
   return data.seq;
 }
 
-static char *rna_SequenceTransform_path(PointerRNA *ptr)
+static char *rna_SequenceTransform_path(const PointerRNA *ptr)
 {
   Scene *scene = (Scene *)ptr->owner_id;
   Editing *ed = SEQ_editing_get(scene);
@@ -556,7 +556,7 @@ static Sequence *sequence_get_by_crop(Editing *ed, StripCrop *crop)
   return data.seq;
 }
 
-static char *rna_SequenceCrop_path(PointerRNA *ptr)
+static char *rna_SequenceCrop_path(const PointerRNA *ptr)
 {
   Scene *scene = (Scene *)ptr->owner_id;
   Editing *ed = SEQ_editing_get(scene);
@@ -700,9 +700,9 @@ static StructRNA *rna_Sequence_refine(struct PointerRNA *ptr)
   }
 }
 
-static char *rna_Sequence_path(PointerRNA *ptr)
+static char *rna_Sequence_path(const PointerRNA *ptr)
 {
-  Sequence *seq = (Sequence *)ptr->data;
+  const Sequence *seq = (Sequence *)ptr->data;
 
   /* sequencer data comes from scene...
    * TODO: would be nice to make SequenceEditor data a data-block of its own (for shorter paths)
@@ -1034,7 +1034,7 @@ static Sequence *sequence_get_by_colorbalance(Editing *ed,
   return data.seq;
 }
 
-static char *rna_SequenceColorBalance_path(PointerRNA *ptr)
+static char *rna_SequenceColorBalance_path(const PointerRNA *ptr)
 {
   Scene *scene = (Scene *)ptr->owner_id;
   SequenceModifierData *smd;
@@ -1178,7 +1178,7 @@ static StructRNA *rna_SequenceModifier_refine(struct PointerRNA *ptr)
   }
 }
 
-static char *rna_SequenceModifier_path(PointerRNA *ptr)
+static char *rna_SequenceModifier_path(const PointerRNA *ptr)
 {
   Scene *scene = (Scene *)ptr->owner_id;
   Editing *ed = SEQ_editing_get(scene);
@@ -1396,7 +1396,7 @@ static void rna_SequenceTimelineChannel_name_set(PointerRNA *ptr, const char *va
                  sizeof(channel->name));
 }
 
-static char *rna_SeqTimelineChannel_path(PointerRNA *ptr)
+static char *rna_SeqTimelineChannel_path(const PointerRNA *ptr)
 {
   Scene *scene = (Scene *)ptr->owner_id;
   Editing *ed = SEQ_editing_get(scene);
diff --git a/source/blender/makesrna/intern/rna_shader_fx.c b/source/blender/makesrna/intern/rna_shader_fx.c
index cefa445740d..0a656222fd5 100644
--- a/source/blender/makesrna/intern/rna_shader_fx.c
+++ b/source/blender/makesrna/intern/rna_shader_fx.c
@@ -142,9 +142,9 @@ static void rna_ShaderFx_name_set(PointerRNA *ptr, const char *value)
   BKE_animdata_fix_paths_rename_all(NULL, "shader_effects", oldname, gmd->name);
 }
 
-static char *rna_ShaderFx_path(PointerRNA *ptr)
+static char *rna_ShaderFx_path(const PointerRNA *ptr)
 {
-  ShaderFxData *gmd = ptr->data;
+  const ShaderFxData *gmd = ptr->data;
   char name_esc[sizeof(gmd->name) * 2];
 
   BLI_str_escape(name_esc, gmd->name, sizeof(name_esc));
diff --git a/source/blender/makesrna/intern/rna_space.c b/source/blender/makesrna/intern/rna_space.c
index 659f31ebd0e..36e032ffa0d 100644
--- a/source/blender/makesrna/intern/rna_space.c
+++ b/source/blender/makesrna/intern/rna_space.c
@@ -1565,7 +1565,7 @@ static int rna_SpaceView3D_icon_from_show_object_viewport_get(PointerRNA *ptr)
                                                     &v3d->object_type_exclude_select);
 }
 
-static char *rna_View3DShading_path(PointerRNA *UNUSED(ptr))
+static char *rna_View3DShading_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("shading");
 }
@@ -1575,7 +1575,7 @@ static PointerRNA rna_SpaceView3D_overlay_get(PointerRNA *ptr)
   return rna_pointer_inherit_refine(ptr, &RNA_View3DOverlay, ptr->data);
 }
 
-static char *rna_View3DOverlay_path(PointerRNA *UNUSED(ptr))
+static char *rna_View3DOverlay_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("overlay");
 }
@@ -1587,12 +1587,12 @@ static PointerRNA rna_SpaceImage_overlay_get(PointerRNA *ptr)
   return rna_pointer_inherit_refine(ptr, &RNA_SpaceImageOverlay, ptr->data);
 }
 
-static char *rna_SpaceImageOverlay_path(PointerRNA *UNUSED(ptr))
+static char *rna_SpaceImageOverlay_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("overlay");
 }
 
-static char *rna_SpaceUVEditor_path(PointerRNA *UNUSED(ptr))
+static char *rna_SpaceUVEditor_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("uv_editor");
 }
@@ -2024,7 +2024,7 @@ static void rna_SpaceProperties_context_update(Main *UNUSED(bmain),
   }
 }
 
-static int rna_SpaceProperties_tab_search_results_getlength(PointerRNA *ptr,
+static int rna_SpaceProperties_tab_search_results_getlength(const PointerRNA *ptr,
                                                             int length[RNA_MAX_ARRAY_DIMENSION])
 {
   SpaceProperties *sbuts = ptr->data;
@@ -2426,12 +2426,12 @@ static void rna_Sequencer_view_type_update(Main *UNUSED(bmain),
   ED_area_tag_refresh(area);
 }
 
-static char *rna_SpaceSequencerPreviewOverlay_path(PointerRNA *UNUSED(ptr))
+static char *rna_SpaceSequencerPreviewOverlay_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("preview_overlay");
 }
 
-static char *rna_SpaceSequencerTimelineOverlay_path(PointerRNA *UNUSED(ptr))
+static char *rna_SpaceSequencerTimelineOverlay_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("timeline_overlay");
 }
@@ -2442,7 +2442,7 @@ static PointerRNA rna_SpaceNode_overlay_get(PointerRNA *ptr)
   return rna_pointer_inherit_refine(ptr, &RNA_SpaceNodeOverlay, ptr->data);
 }
 
-static char *rna_SpaceNodeOverlay_path(PointerRNA *UNUSED(ptr))
+static char *rna_SpaceNodeOverlay_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("overlay");
 }
@@ -2635,7 +2635,7 @@ static void rna_SpaceClipEditor_view_type_update(Main *UNUSED(bmain),
 
 /* File browser. */
 
-static char *rna_FileSelectParams_path(PointerRNA *UNUSED(ptr))
+static char *rna_FileSelectParams_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("params");
 }
diff --git a/source/blender/makesrna/intern/rna_texture.c b/source/blender/makesrna/intern/rna_texture.c
index 6f7ee966723..eff7c0ca136 100644
--- a/source/blender/makesrna/intern/rna_texture.c
+++ b/source/blender/makesrna/intern/rna_texture.c
@@ -291,7 +291,7 @@ void rna_TextureSlot_update(bContext *C, PointerRNA *ptr)
   }
 }
 
-char *rna_TextureSlot_path(PointerRNA *ptr)
+char *rna_TextureSlot_path(const PointerRNA *ptr)
 {
   MTex *mtex = ptr->data;
 
diff --git a/source/blender/makesrna/intern/rna_tracking.c b/source/blender/makesrna/intern/rna_tracking.c
index aac84f1867e..b9acd57430b 100644
--- a/source/blender/makesrna/intern/rna_tracking.c
+++ b/source/blender/makesrna/intern/rna_tracking.c
@@ -41,7 +41,7 @@
 
 #  include "WM_api.h"
 
-static char *rna_tracking_path(PointerRNA *UNUSED(ptr))
+static char *rna_tracking_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tracking");
 }
@@ -72,7 +72,7 @@ static void rna_tracking_defaultSettings_searchUpdate(Main *UNUSED(bmain),
   }
 }
 
-static char *rna_trackingTrack_path(PointerRNA *ptr)
+static char *rna_trackingTrack_path(const PointerRNA *ptr)
 {
   MovieClip *clip = (MovieClip *)ptr->owner_id;
   MovieTrackingTrack *track = (MovieTrackingTrack *)ptr->data;
@@ -255,7 +255,7 @@ static void rna_trackingPlaneMarker_frame_set(PointerRNA *ptr, int value)
   }
 }
 
-static char *rna_trackingPlaneTrack_path(PointerRNA *ptr)
+static char *rna_trackingPlaneTrack_path(const PointerRNA *ptr)
 {
   MovieClip *clip = (MovieClip *)ptr->owner_id;
   MovieTrackingPlaneTrack *plane_track = (MovieTrackingPlaneTrack *)ptr->data;
@@ -289,7 +289,7 @@ static void rna_trackingPlaneTrack_name_set(PointerRNA *ptr, const char *value)
   }
 }
 
-static char *rna_trackingCamera_path(PointerRNA *UNUSED(ptr))
+static char *rna_trackingCamera_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tracking.camera");
 }
@@ -321,7 +321,7 @@ static void rna_trackingCamera_focal_mm_set(PointerRNA *ptr, float value)
   }
 }
 
-static char *rna_trackingStabilization_path(PointerRNA *UNUSED(ptr))
+static char *rna_trackingStabilization_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("tracking.stabilization");
 }
diff --git a/source/blender/makesrna/intern/rna_volume.c b/source/blender/makesrna/intern/rna_volume.c
index 0c32ed45dce..6d4ea18fc38 100644
--- a/source/blender/makesrna/intern/rna_volume.c
+++ b/source/blender/makesrna/intern/rna_volume.c
@@ -46,12 +46,12 @@ const EnumPropertyItem rna_enum_volume_grid_data_type_items[] = {
 #  include "WM_api.h"
 #  include "WM_types.h"
 
-static char *rna_VolumeRender_path(PointerRNA *UNUSED(ptr))
+static char *rna_VolumeRender_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("render");
 }
 
-static char *rna_VolumeDisplay_path(PointerRNA *UNUSED(ptr))
+static char *rna_VolumeDisplay_path(const PointerRNA *UNUSED(ptr))
 {
   return BLI_strdup("display");
 }