Enum Error 

pub enum Error {
    AddrParse(AddrParseError),
    Internal(String),
    InvalidArgument(String),
    Io(Error),
    StringParse(ParseError),
    Values(ValueError),
}

Error represents the various errors which can come up while parsing command-line flags.

Variants

AddrParse(AddrParseError)

An error parsing an IP address.

Internal(String)

An internal unrecoverable error, usually due to some underlying library.

InvalidArgument(String)

Errors akin to EINVAL - essentially, an argument passed into a function was invalid in some way..

Io(Error)

An I/O error, generally encountered when interacting with the filesystem.

StringParse(ParseError)

An awkward hack; this error exists to use String’s FromStr impl, but this operation won’t actually ever fail.

Values(ValueError)

A flaggy_values error.

Trait Implementations

impl Debug for Error

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Error

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<AddrParseError> for Error

fn from(source: AddrParseError) -> Self

Converts to this type from the input type.

impl From<Error> for Error

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Infallible> for Error

fn from(source: ParseError) -> Self

Converts to this type from the input type.

impl From<ValueError> for Error

fn from(source: ValueError) -> Self

Converts to this type from the input type.