RNA: Allow structs to define tags for their properties

Adds support for defining a number of tags as part of the rna-struct
definition, which its properties can set similar to property-flags.
BPY supports setting these tags when defining custom properties too.

* To define tags for a struct (which its properties can use then), define the tags in an `EnumPropertyItem` array, and assign them to the struct using `RNA_def_struct_property_tags(...)`.
* To set tags for an RNA-property in C, use the new `RNA_def_property_tags(...)`.
* To set tags for an RNA-property in Python, use the newly added tags parameter. E.g. `bpy.props.FloatProperty(name="Some Float", tags={'SOME_TAG', 'ANOTHER_TAG'})`.

Actual usage of this will be added in a follow-up commit.

1 files changed, 2 insertions, 0 deletions

diff --git a/source/blender/makesrna/RNA_define.h b/source/blender/makesrna/RNA_define.h
index 47648583e14..e9e4276b235 100644
--- a/source/blender/makesrna/RNA_define.h
+++ b/source/blender/makesrna/RNA_define.h
@@ -66,6 +66,7 @@ void RNA_def_struct_name_property(StructRNA *srna, PropertyRNA *prop);
 void RNA_def_struct_nested(BlenderRNA *brna, StructRNA *srna, const char *structname);
 void RNA_def_struct_flag(StructRNA *srna, int flag);
 void RNA_def_struct_clear_flag(StructRNA *srna, int flag);
+void RNA_def_struct_property_tags(StructRNA *srna, const EnumPropertyItem *prop_tag_defines);
 void RNA_def_struct_refine_func(StructRNA *srna, const char *refine);
 void RNA_def_struct_idprops_func(StructRNA *srna, const char *refine);
 void RNA_def_struct_register_funcs(StructRNA *srna, const char *reg, const char *unreg, const char *instance);
@@ -148,6 +149,7 @@ void RNA_def_property_collection_sdna(PropertyRNA *prop, const char *structname,
 
 void RNA_def_property_flag(PropertyRNA *prop, PropertyFlag flag);
 void RNA_def_property_clear_flag(PropertyRNA *prop, PropertyFlag flag);
+void RNA_def_property_tags(PropertyRNA *prop, int tags);
 void RNA_def_property_subtype(PropertyRNA *prop, PropertySubType subtype);
 void RNA_def_property_array(PropertyRNA *prop, int length);
 void RNA_def_property_multi_array(PropertyRNA *prop, int dimension, const int length[]);