Enum ParseError 

#[non_exhaustive]
pub enum ParseError {
    UnknownShortOption(char, Field),
    UnknownLongOption(Field),
    AmbiguousLongOption(Field),
    UncancelableShortOption(char, Field),
    UncancelableLongOption(Field),
}

Error in command line parsing

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

UnknownShortOption(char, Field)

Short option that is not defined in the option specs

UnknownLongOption(Field)

Long option that is not defined in the option specs

AmbiguousLongOption(Field)

Long option that matches the prefix of more than one option name.

UncancelableShortOption(char, Field)

Negated short option that is not an attribute

UncancelableLongOption(Field)

Negated long option that is not an attribute

Implementations

impl ParseError

pub fn field(&self) -> &Field

Returns the field containing the option that caused this error.

pub fn to_report(&self) -> Report<'_>

Converts this error to a Report.

Trait Implementations

impl Clone for ParseError

fn clone(&self) -> ParseError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParseError

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

Formats the value using the given formatter.

impl Display for ParseError

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

Formats the value using the given formatter.

impl Error for ParseError

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<'a> From<&'a ParseError> for Report<'a>

fn from(error: &'a ParseError) -> Self

Converts to this type from the input type.

impl PartialEq for ParseError

fn eq(&self, other: &ParseError) -> 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 ParseError

impl StructuralPartialEq for ParseError