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, either among the command line arguments or in an API call.

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