Struct ArgParseError 

pub struct ArgParseError(/* private fields */);

An error produced while scanning CLI arguments.

Carries a fully-formatted, human-readable message. Implements std::error::Error so it converts into anyhow::Error (or any other Error-based error type) via ? without an explicit map_err.

The message field is private so every ArgParseError is built through this module’s formatting helper, keeping wording consistent — construct one only via the functions below, and read the message back with ArgParseError::message.

Implementations

impl ArgParseError

pub fn message(&self) -> &str

The formatted, human-readable message.

Trait Implementations

impl Clone for ArgParseError

fn clone(&self) -> ArgParseError

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ArgParseError

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

Formats the value using the given formatter.

impl Display for ArgParseError

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

Formats the value using the given formatter.

impl Error for ArgParseError

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 PartialEq for ArgParseError

fn eq(&self, other: &ArgParseError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for ArgParseError

impl StructuralPartialEq for ArgParseError