Enum rustop::ArgError

pub enum ArgError {
    MissingArgument,
    UnexpectedArgument(String),
    ParseError(Box<dyn StdError>),
}

An error when parsing an argument of an option or parameter.

Variants

MissingArgument

Required argument is missing.

UnexpectedArgument(String)

An unexpected argument has been found (e.g. for a flag).

ParseError(Box<dyn StdError>)

Error parsing the string to the required argument type.

Trait Implementations

impl Debug for ArgError

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

Formats the value using the given formatter.

impl Display for ArgError

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

Formats the value using the given formatter.

impl Error for ArgError

pub fn cause(&self) -> Option<&dyn StdError>

👎 Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

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

The lower-level source of this error, if any.

pub fn backtrace(&self) -> Option<&Backtrace>

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

Returns a stack backtrace, if available, of where this error occurred.

pub fn description(&self) -> &str

👎 Deprecated since 1.42.0:

use the Display impl or to_string()