grouping_predicates: Predicates classifying a by entry
Description
is_stem_entry() returns TRUE for an unnamed single-element character
string (a stem like "age" or "gender"). is_explicit_entry() returns
TRUE for a two-element character vector with names "part" and "cnt".
Used by resolve_one_grouping() to choose the right constructor.
Usage
is_stem_entry(entry)is_explicit_entry(entry)
Arguments
- entry
one element of the user-facing by argument