Enum CliError 

pub enum CliError {
    Parse(ParseError),
    NoHandler(String),
    Handler(Box<dyn Error + Send + Sync>),
}

Errors produced by Cli::run.

Variants

Parse(ParseError)

A parse error occurred (unknown command, missing argument, etc.).

When this variant is returned, Cli::run also prints the error and best-effort help to stderr before returning.

NoHandler(String)

The matched command has no handler registered.

The inner String is the canonical name of the command.

Handler(Box<dyn Error + Send + Sync>)

The registered handler returned an error.

The inner boxed error carries the handler’s error message.

Trait Implementations

impl Debug for CliError

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

Formats the value using the given formatter.

impl Display for CliError

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

Formats the value using the given formatter.

impl Error for CliError

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<Box<dyn Error + Send + Sync>> for CliError

fn from(source: Box<dyn Error + Send + Sync>) -> Self

Converts to this type from the input type.

impl From<ParseError> for CliError

fn from(source: ParseError) -> Self

Converts to this type from the input type.