get_destructure_objects: Get the output object names of the destructure (rhino::%<-%) assignment operator.
Description
This is a naive search for the SYMBOLS within a c() as the first expression before
the %<-%. For example: c(x, y, z) %<-% ....
Usage
get_destructure_objects(xml)
Value
a list of xml_nodes and text
Arguments
- xml
An XML node list