OPERAND_SINGLE
(subcommand->operand & OPERAND_SINGLE)) {
#define OPERAND_MANDATORY_SINGLE (OPERAND_MANDATORY | OPERAND_SINGLE)
#define OPERAND_OPTIONAL_SINGLE (OPERAND_OPTIONAL | OPERAND_SINGLE)
(subcommand->operand & OPERAND_SINGLE)) {
#define OPERAND_MANDATORY_SINGLE (OPERAND_MANDATORY | OPERAND_SINGLE)
#define OPERAND_OPTIONAL_SINGLE (OPERAND_OPTIONAL | OPERAND_SINGLE)