46 lines
1.2 KiB
Rust
46 lines
1.2 KiB
Rust
use std::str::FromStr;
|
|
use std::fmt;
|
|
|
|
/// A language tag.
|
|
/// See http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.10
|
|
///
|
|
/// Note: This is no complete language tag implementation, it should be replaced with
|
|
/// github.com/pyfisch/rust-language-tag once it is ready.
|
|
#[derive(Clone, PartialEq, Debug)]
|
|
pub struct Language {
|
|
/// The language tag
|
|
pub primary: String,
|
|
/// A language subtag or country code
|
|
pub sub: Option<String>
|
|
}
|
|
|
|
impl FromStr for Language {
|
|
type Err = ();
|
|
fn from_str(s: &str) -> Result<Language, ()> {
|
|
let mut i = s.split("-");
|
|
let p = i.next();
|
|
let s = i.next();
|
|
match (p, s) {
|
|
(Some(p), Some(s)) => Ok(Language {
|
|
primary: p.to_owned(),
|
|
sub: Some(s.to_owned())
|
|
}),
|
|
(Some(p), _) => Ok(Language {
|
|
primary: p.to_owned(),
|
|
sub: None
|
|
}),
|
|
_ => Err(())
|
|
}
|
|
}
|
|
}
|
|
|
|
impl fmt::Display for Language {
|
|
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
|
|
try!(f.write_str(&self.primary[..]));
|
|
match self.sub {
|
|
Some(ref s) => write!(f, "-{}", s),
|
|
None => Ok(())
|
|
}
|
|
}
|
|
}
|