Enum Error

pub enum Error {
    DuplicateLong(String),
    DuplicateShort(char),
    MissingLongAndShort,
    Unknown(OptName),
    InvalidLong(String),
    InvalidArgument(OptName, ArgError),
    AmbiguousPrefix(String, Vec<String>),
    Multiple(OptName),
    MissingOpt(OptName),
    MissingParam(OptName),
    Help(String),
}

An error message when parsing command line arguments.

Variants

DuplicateLong(String)

A duplicated long option has been specified.

DuplicateShort(char)

A duplicated short option has been specified.

MissingLongAndShort

Missing short and long option.

Unknown(OptName)

Unknown option.

InvalidLong(String)

An invalid long option name.

InvalidArgument(OptName, ArgError)

An error when parsing an argument.

AmbiguousPrefix(String, Vec<String>)

A command-line prefix is ambigious.

Multiple(OptName)

A regular option has been specified multiple times.

MissingOpt(OptName)

A required option has not been specified.

MissingParam(OptName)

A required parameter has not been specified.

Help(String)

The help message should be shown.

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, fmt: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.