Enum arguably::Error

pub enum Error {
    InvalidName(String),
    MissingValue(String),
    MissingHelpArg,
    InvalidUnicode,
}

Error types returned by the library.

Variants

InvalidName(String)

Returned when the parser detects an unregistered flag, option, or command name.

MissingValue(String)

Returned when the parser detects an option with a missing value.

MissingHelpArg

Returned when the parser detects a help command with a missing argument.

InvalidUnicode

Returned when the command line arguments are not valid unicode strings.

Implementations

impl Error

pub fn exit(self) -> !

Prints an error message to stderr and exits with a non-zero status code.

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, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for Error

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

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

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

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

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

fn description(&self) -> &str

👎 Deprecated since 1.42.0:

use the Display impl or to_string()

if let Err(e) = "xc".parse::<u32>() { // Print e itself, no need for description(). eprintln!("Error: {}", e); }

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

👎 Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting