Enum ValueError 

pub enum ValueError {
    BadBoolean(String),
    CallbackParameter(String),
    MissingCommand,
    MissingFlag(String),
    MissingValue(String),
    UnknownCommand(String),
    UnknownFlag(String),
}

Variants

BadBoolean(String)

A malformed boolean value was found.

CallbackParameter(String)

A Command callback parameter was of the wrong type, so flag value passing failed.

MissingCommand

No command was specified.

MissingFlag(String)

A required flag was not provided.

MissingValue(String)

A flag was provided with no associated value.

UnknownCommand(String)

An unrecognized command was provided.

UnknownFlag(String)

An unrecognized flag was provided.

Trait Implementations

impl Debug for ValueError

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

Formats the value using the given formatter.

impl Display for ValueError

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

Formats the value using the given formatter.

impl Error for ValueError

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.