Get values available for non-standard evaluation in a taxonomy() or taxmap() object used in expressions. Expressions are not evaluated and do not need to make sense.
taxonomy()
taxmap()
obj$data_used(...) data_used(obj, ...)
a taxonomy() or taxmap() object
One or more expressions
list
Other accessors: all_names, get_data, names_used
all_names
get_data
names_used
# NOT RUN { taxa:::data_used(ex_taxmap, n_legs + dangerous == invalid_expression) # }
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