pub trait Unimplemented {
    const KIND: Kind;
    const UNIMPLEMENTED: &'static [&'static str];

    fn check_if_implemented(flag: &str) -> Result<()> { ... }
    fn unknown<T>(flag: String) -> Result<T> { ... }
}

Required Associated Constants

Kind of option; used for reporting errors

Slice of valid but as yet unimplemented options

Provided Methods

check if a flag is valid but unimplemented

helper function; an invalid flag key

Implementors