left_set_value left_span_value left_spanset_value left_value_set left_value_span left_value_spanset overleft_set_value overleft_span_value overleft_spanset_value overleft_value_set overleft_value_span overleft_value_spanset overright_set_value overright_span_value overright_spanset_value overright_value_set overright_value_span overright_value_spanset right_set_value right_span_value right_spanset_value right_value_set right_value_span right_value_spanset

left_value_span() bool left_value_span ( Datum  d, meosType  basetype, const Span *  s  ) Return true if a value is strictly to the left of a span.