Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 136 insertions, 0 deletions

diff --git a/third_party/rust/unic-langid/src/lib.rs b/third_party/rust/unic-langid/src/lib.rs
new file mode 100644
index 0000000000..f66fb444a3
--- /dev/null
+++ b/third_party/rust/unic-langid/src/lib.rs
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+//! `unic-langid` is a core API for parsing, manipulating, and serializing Unicode Language
+//! Identifiers.
+//!
+//! The crate provides algorithms for parsing a string into a well-formed language identifier
+//! as defined by [`UTS #35: Unicode LDML 3.1 Unicode Language Identifier`].
+//!
+//! # Examples
+//!
+//! ```
+//! use unic_langid::LanguageIdentifier;
+//! use unic_langid::subtags::{Language, Script, Region};
+//!
+//! let mut li: LanguageIdentifier = "en-US".parse()
+//!     .expect("Parsing failed.");
+//!
+//! let lang: Language = "en".parse().expect("Parsing failed.");
+//! let region: Region = "US".parse().expect("Parsing failed.");
+//! assert_eq!(li.language, lang);
+//! assert_eq!(li.script, None);
+//! assert_eq!(li.region, Some(region));
+//! assert_eq!(li.variants().len(), 0);
+//!
+//! let region: Region = "GB".parse().expect("Parsing failed.");
+//! li.region = Some(region);
+//!
+//! assert_eq!(li.to_string(), "en-GB");
+//! ```
+//!
+//! For more details, see [`LanguageIdentifier`].
+//!
+//! # Optional features
+//!
+//! ## `langid!`, `langids!`, and `langid_slice!` macros
+//!
+//! If `feature = "macros"` is selected, the crate provides a procedural macro
+//! which allows to construct build-time well-formed language identifiers with zero-cost at runtime.
+//!
+//! ``` ignore
+//! use unic_langid::{langid, langid_slice, langids, lang, region, script, variant, LanguageIdentifier};
+//! use unic_langid::subtags::{Language, Script, Region, Variant};
+//! use std::str::FromStr;
+//!
+//! let es_ar = langid!("es-AR");
+//! let en_us = langid!("en-US");
+//!
+//! assert_eq!(&es_ar.to_string(), "es-AR");
+//! assert_eq!(&en_us.to_string(), "en-US");
+//!
+//! let lang_ids = langids!("es-AR", "en-US", "de");
+//!
+//! assert_eq!(lang_ids[0], "es-AR");
+//! assert_eq!(lang_ids[1], "en-US");
+//! assert_eq!(lang_ids[2], "de");
+//!
+//! const LANGUAGES: &[LanguageIdentifier] = langid_slice!["en-GB", "fr"];
+//!
+//! assert_eq!(lang!("pl"), "pl");
+//! assert_eq!(lang!("pl"), Language::from_str("pl").unwrap());
+//!
+//! assert_eq!(script!("latn"), "Latn");
+//! assert_eq!(script!("latn"), Script::from_str("Latn").unwrap());
+//!
+//! assert_eq!(region!("us"), "US");
+//! assert_eq!(region!("us"), Region::from_str("us").unwrap());
+//!
+//! assert_eq!(variant!("macos"), "macos");
+//! assert_eq!(variant!("macos"), Variant::from_str("macos").unwrap());
+//! ```
+//!
+//! The macros produce instances of `LanguageIdentifier` the same way as parsing from `&str` does,
+//! but since the parsing is performed at build time, it doesn't need a `Result`.
+//!
+//! At the moment `langid!` can also be used for const variables, but only if no variants are used.
+//!
+//! The macros are optional to reduce the dependency chain and compilation time of `unic-langid`.
+//!
+//! ## Likely Subtags
+//!
+//! If `feature = "likelysubtags"` is selected, the `LanguageIdentifier` gains two more methods:
+//!
+//!  * add_likely_subtags
+//!  * remove_likely_subtags
+//!
+//! Both of them operate in place updating the existing `LanguageIdentifier` by either extending
+//! subtags to most likely values, or removing the subtags that are not needed.
+//!
+//! Both methods return a `bool` that indicates if the identifier has been modified.
+//!
+//! ``` ignore
+//! use unic_langid::LanuageIdentifier;
+//!
+//! let mut li: LanguageIdentifier = "fr-FR".parse()
+//!     .expect("Parsing failed.");
+//!
+//! assert_eq!(li.add_likely_subtags(), true);
+//! assert_eq!(li, "fr-Latn-FR");
+//!
+//! assert_eq!(li.remove_likely_subtags(), true);
+//! assert_eq!(li, "fr");
+//! ```
+//!
+//! The feature is optional because it increases the binary size of the library by including
+//! a data table for CLDR likelySubtags.
+//!
+//! [`UTS #35: Unicode LDML 3.1 Unicode Language Identifier`]: https://unicode.org/reports/tr35/tr35.html#Unicode_language_identifier
+//! [`LanguageIdentifier`]: ./struct.LanguageIdentifier.html
+
+pub use unic_langid_impl::*;
+
+#[cfg(feature = "unic-langid-macros")]
+pub use unic_langid_macros::{lang, langid, region, script, variant};
+
+#[cfg(feature = "unic-langid-macros")]
+#[macro_export]
+macro_rules! langids {
+    ( $($langid:expr),* ) => {
+        vec![$(
+            $crate::langid!($langid),
+        )*]
+    };
+    ( $($langid:expr,)* ) => {
+        $crate::langids![$($langid),*]
+    };
+}
+#[cfg(feature = "unic-langid-macros")]
+#[macro_export]
+macro_rules! langid_slice {
+    ( $($langid:expr),* ) => {
+        &[$(
+            $crate::langid!($langid),
+        )*]
+    };
+    ( $($langid:expr,)* ) => {
+        $crate::langid_slice![$($langid),*]
+    };
+}