Creates an option that does not have a value.
Option option_default(void);
Returns: An option that holds no value.
OPTION_DEFINE_H(StringOption, str_opt, char*)
// Strongly Typed:
StringOption option = str_opt_default();
printf("Has Value? %d\n", str_opt_has_value(option));
// Output:
// Has Value? 0
// Generically Typed:
StringOption option = gds_option_default(StringOption);
printf("Has Value? %d\n", gds_option_has_value(option));
// Output:
// Has Value? 0