Enum Error

pub enum Error {
    ExpectedNamed(&'static str),
    ExpectedPositional(usize),
    ExpectedValue(&'static str),
    UnknownFlag(String),
    ExtraArg(String),
    UnknownSub(String),
    Parse(ArgRef, Box<dyn StdError>),
}

Variants

ExpectedNamed(&'static str)

ExpectedPositional(usize)

ExpectedValue(&'static str)

UnknownFlag(String)

ExtraArg(String)

UnknownSub(String)

Parse(ArgRef, Box<dyn StdError>)

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.