Enum KeywordError 

#[non_exhaustive]
pub enum KeywordError {
    Empty,
    InvalidChar(char),
    ReservedPrefix,
}

Error returned by Keyword::try_new when the input violates RFC 8621 §4.1.1.

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.

Empty

The keyword string is empty.

InvalidChar(char)

The keyword contains a character outside the allowed set (RFC 8621 §4.1.1: visible ASCII, no whitespace).

ReservedPrefix

The keyword starts with $ but is not one of the IANA-registered system keywords. Custom keywords MUST NOT begin with $ (RFC 8621 §4.1.1).

Trait Implementations

impl Clone for KeywordError

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for KeywordError

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

Formats the value using the given formatter.

impl Display for KeywordError

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

Formats the value using the given formatter.

impl Eq for KeywordError

impl Error for KeywordError

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 KeywordError

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for KeywordError