1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123

//! `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!` and `langids!` 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, langids, lang, region, script, variant};
//! 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");
//!
//! 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),* ) => {
        {
            let mut v = vec![];
            $(
                v.push(langid!($langid));
            )*
            v
        }
    };
}