fix [#35984] no way to know if a datablock is in editmode

the report explains the issue in detail, but basically you couldn't know if a mesh was in editmode without checking all the objects that use it.
add `is_editmode` readonly property for all datatypes which support editmode.

also make rna fail to build on implicit function declarations.

1 files changed, 12 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_armature.c b/source/blender/makesrna/intern/rna_armature.c
index b222dd9148b..fd151ccebb9 100644
--- a/source/blender/makesrna/intern/rna_armature.c
+++ b/source/blender/makesrna/intern/rna_armature.c
@@ -472,6 +472,12 @@ static void rna_Armature_bones_next(CollectionPropertyIterator *iter)
 	iter->valid = (internal->link != NULL);
 }
 
+static int rna_Armature_is_editmode_get(PointerRNA *ptr)
+{
+	bArmature *arm = (bArmature *)ptr->id.data;
+	return (arm->edbo != NULL);
+}
+
 #else
 
 static int rna_matrix_dimsize_4x4[] = {4, 4};
@@ -1071,6 +1077,12 @@ static void rna_def_armature(BlenderRNA *brna)
 	RNA_def_property_update(prop, 0, "rna_Armature_redraw_data");
 	RNA_def_property_flag(prop, PROP_LIB_EXCEPTION);
 /* XXX deprecated ....... old animviz for armatures only */
+
+
+	prop = RNA_def_property(srna, "is_editmode", PROP_BOOLEAN, PROP_NONE);
+	RNA_def_property_boolean_funcs(prop, "rna_Armature_is_editmode_get", NULL);
+	RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+	RNA_def_property_ui_text(prop, "Is Editmode", "True when used in editmode");
 }
 
 void RNA_def_armature(BlenderRNA *brna)