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// This file is part of ICU4X. For terms of use, please see the file
// called LICENSE at the top level of the ICU4X source tree
use displaydoc::Display;
/// List of parser errors that can be generated
/// while parsing [`LanguageIdentifier`](crate::LanguageIdentifier), [`Locale`](crate::Locale),
/// [`subtags`](crate::subtags) or [`extensions`](crate::extensions).
///
/// Re-exported as [`Error`](crate::Error).
#[derive(Display, Debug, PartialEq, Copy, Clone)]
#[non_exhaustive]
pub enum ParserError {
/// Invalid language subtag.
///
/// # Examples
///
/// ```
/// use icu::locid::subtags::Language;
/// use icu::locid::ParserError;
///
/// assert_eq!("x2".parse::<Language>(), Err(ParserError::InvalidLanguage));
/// ```
#[displaydoc("The given language subtag is invalid")]
InvalidLanguage,
/// Invalid script, region or variant subtag.
///
/// # Examples
///
/// ```
/// use icu::locid::subtags::Region;
/// use icu::locid::ParserError;
///
/// assert_eq!("#@2X".parse::<Region>(), Err(ParserError::InvalidSubtag));
/// ```
#[displaydoc("Invalid subtag")]
InvalidSubtag,
/// Invalid extension subtag.
///
/// # Examples
///
/// ```
/// use icu::locid::extensions::unicode::Key;
/// use icu::locid::ParserError;
///
/// assert_eq!("#@2X".parse::<Key>(), Err(ParserError::InvalidExtension));
/// ```
#[displaydoc("Invalid extension")]
InvalidExtension,
/// Duplicated extension.
///
/// # Examples
///
/// ```
/// use icu::locid::Locale;
/// use icu::locid::ParserError;
///
/// assert_eq!(
/// "und-u-hc-h12-u-ca-calendar".parse::<Locale>(),
/// Err(ParserError::DuplicatedExtension)
/// );
/// ```
#[displaydoc("Duplicated extension")]
DuplicatedExtension,
}
#[cfg(feature = "std")]
impl std::error::Error for ParserError {}