language-tag 0.9.0

This crate can handle language tags as defined in the [BCP47](https://tools.ietf.org/html/bcp47) standard.

A language tag is the small string that describe a culture (language with script, region, etc).
Examples: "en-US" (english as used in US), "fr-FR" (french as used in France), "zh-cmn-Hans-CN" (Chinese, Mandarin, Simplified script, as used in China).

To use this crate, add the relevant dependency in your Cargo.toml.

```toml
[dependencies]
language-tag = "0.9"
```

Then load the lib in your crate root:

```
extern crate language_tag;
```

# Examples

This crate support the LanguageTag as defined in the standard but mostly you will probably be interested in the LangTag only (names are taken from the standard).

## Query a parsed language tag

```
use language_tag::*;
use std::str::FromStr;

let langtag = LangTag::from_str("zh-cmn-Hans-CN").unwrap();

assert!(langtag.get_language().get_mainlang() == "zh");
assert!(langtag.get_script().unwrap().str() == "Hans");
assert!(langtag.get_region().unwrap().str() == "CN");
```

## Use the LangTagBuilder

```
use language_tag::*;

let langtag = LangTagBuilder::new("zh")
                .language_extension("cmn")
                .script("Hans")
                .region("CN")
                .build().unwrap();

assert!(langtag.get_language().get_mainlang() == "zh");
assert!(langtag.get_script().unwrap().str() == "Hans");
assert!(langtag.get_region().unwrap().str() == "CN");
```

# Todo

- Better error reporting.
- Finish doc