Enum Error 

pub enum Error {
    CommandNotFound(String),
    InvalidArgument(String),
    MissingArgument(String),
    InvalidFlag(String),
    MissingFlag(String),
    InvalidFlagValue {
        flag: String,
        message: String,
    },
    InvalidArgumentValue(String),
    InvalidInput(String),
    TooManyArguments,
    ExecutionError(String),
    CompletionError(String),
    IoError(Error),
    InterruptError,
    ParseError(String),
    TypeError(String),
    Custom(String),
}

Errors that can occur during command parsing and execution

Note: Help, Version, and Completion requests are handled via ParseResult enum in the parser module, not as errors.

Variants

CommandNotFound(String)

InvalidArgument(String)

MissingArgument(String)

InvalidFlag(String)

MissingFlag(String)

InvalidFlagValue

Fields

flag: String

message: String

InvalidArgumentValue(String)

InvalidInput(String)

TooManyArguments

ExecutionError(String)

CompletionError(String)

IoError(Error)

InterruptError

ParseError(String)

TypeError(String)

Custom(String)

Implementations

impl Error

pub fn custom(msg: impl Into<String>) -> Error

Create a custom error with a message

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

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<Error> for Error

fn from(source: Error) -> Error

Converts to this type from the input type.