isMixedNumericNamedFieldGroup determines if a field group is a range where one
element is a field number and the other element is a named field (not a number).
This routine is used for better error handling. Currently, field ranges must be
either entirely numeric or entirely named. This is primarily to catch unintended
used of a mixed range on the command line.
isMixedNumericNamedFieldGroup determines if a field group is a range where one element is a field number and the other element is a named field (not a number).
This routine is used for better error handling. Currently, field ranges must be either entirely numeric or entirely named. This is primarily to catch unintended used of a mixed range on the command line.