a6bdad699c
The copy-to-selected operator for RNA buttons uses paths for copying object pointer properties. Copying other ID data blocks is deliberately disabled: https://developer.blender.org/diffusion/B/browse/master/source/blender/editors/interface/interface_ops.c$274 However, the RNA_path_resolve_full function is not properly working for retrieving pointer properties: it always will dereference pointer properties in anticipation of further path elements. In fact the return value of RNA_path_resolve_full has a conflicting double meaning. It returns `false` when * the RNA path is invalid * any of the pointer properties is NULL This means that it is not capable of returning pointer properties at all. To make this possible, there is now an internal function for path parsing, which returns false //only// if the the path is invalid. On top of this there are 4 wrapper functions for retrieving either actual property values (RNA_path_resolve, RNA_path_resolve_full) and for retrieving pointer+property pairs (RNA_path_resolve_property, RNA_path_resolve_property_full). The latter 2 variants will **not** dereference pointer properties at the end of the path, so callers can actually get the property itself. The `***_full` variants include an array index return value. Differential Revision: https://developer.blender.org/D396