Enum language_tags::Error

pub enum Error {
    DuplicateExtension,
    EmptyExtension,
    EmptyPrivateUse,
    ForbiddenChar,
    InvalidSubtag,
    InvalidLanguage,
    SubtagTooLong,
    TooManyExtlangs,
}

Defines an Error type for langtags.

Errors occur mainly during parsing of language tags.

Variants

DuplicateExtension

The same extension subtag is only allowed once in a tag before the private use part.

EmptyExtension

If an extension subtag is present, it must not be empty.

EmptyPrivateUse

If the x subtag is present, it must not be empty.

ForbiddenChar

The langtag contains a char that is not A-Z, a-z, 0-9 or the dash.

InvalidSubtag

A subtag fails to parse, it does not match any other subtags.

InvalidLanguage

The given language subtag is invalid.

SubtagTooLong

A subtag may be eight characters in length at maximum.

TooManyExtlangs

At maximum three extlangs are allowed, but zero to one extlangs are preferred.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Eq for Error

impl Error for Error

fn description(&self) -> &str

Deprecated since 1.42.0:

use the Display impl or to_string()

if let Err(e) = "xc".parse::<u32>() { // Print e itself, no need for description(). eprintln!("Error: {}", e); }

fn source(&self) -> Option<&(dyn Error + 'static)>

The lower-level source of this error, if any.

fn backtrace(&self) -> Option<&Backtrace>

🔬 This is a nightly-only experimental API. (backtrace)

Returns a stack backtrace, if available, of where this error occurred.

fn cause(&self) -> Option<&dyn Error>

Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl PartialEq<Error> for Error

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

This method tests for self and other values to be equal, and is used by ==.

#[must_use] fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl StructuralEq for Error

impl StructuralPartialEq for Error