Enum ArgsError 

pub enum ArgsError {
    Lexopt(Error),
    InvalidValue(&'static str, String),
    UnexpectedArgument(String),
}

Argument parsing errors.

Variants

Lexopt(Error)

Lexopt parsing error.

InvalidValue(&'static str, String)

Invalid argument value.

UnexpectedArgument(String)

Unexpected positional argument.

Trait Implementations

impl Debug for ArgsError

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

Formats the value using the given formatter.

impl Display for ArgsError

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

Formats the value using the given formatter.

impl Error for ArgsError

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<Error> for ArgsError

fn from(e: Error) -> Self

Converts to this type from the input type.