css 0.0.22

// This file is part of css. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT. No part of predicator, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2017 The developers of css. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/css/master/COPYRIGHT.


#[derive(Debug, Clone, Ord, PartialOrd, Eq, PartialEq, Hash)]
pub struct LanguageRanges(Vec<LanguageRange>);

impl ToCss for LanguageRanges
{
	fn to_css<W: fmt::Write>(&self, dest: &mut W) -> fmt::Result
	{
		if self.0.is_empty()
		{
			return Ok(());
		}
		
		let mut iterator = self.0.iter();
		iterator.next().unwrap().to_css(dest)?;
		for languageRange in iterator
		{
			dest.write_char(',')?;
			languageRange.to_css(dest)?;
		}
		Ok(())
	}
}

impl LanguageRanges
{
	/// Returns whether the language is matched, as defined by [RFC 4647](https://tools.ietf.org/html/rfc4647#section-3.3.2).
	pub fn matches_language(&self, tag: &str) -> bool
	{
		self.0.iter().any(|languageRange| languageRange.matches_language(tag))
	}
}