/
lang.rs.erb
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/
lang.rs.erb
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// NOTE:
// This file is generated automatically.
// Edit misc/lang.rs.erb template instead of editing lang.rs file directly.
use std::fmt;
use std::str::FromStr;
use crate::error::ParseError;
#[cfg(feature = "enum-map")]
use enum_map::Enum;
/// Represents a language following [ISO 639-3](https://en.wikipedia.org/wiki/ISO_639-3) standard.
#[cfg_attr(feature = "enum-map", derive(Enum))]
#[derive(PartialEq, Eq, Debug, Hash, Clone, Copy)]
pub enum Lang {
<% langs.each_with_index do |lang, index| %>
/// <%= lang.name %> (<%= lang.eng_name %>)
<%= lang.code.capitalize %> = <%= index %>,
<% end %>
}
const VALUES: [Lang; <%= langs.size %>] = [
<% langs.each do |lang| %>
Lang::<%= lang.code.capitalize %>,
<% end %>
];
fn lang_from_code<S: Into<String>>(code: S) -> Option<Lang> {
match code.into().to_lowercase().as_ref() {
<% langs.each do |lang| %>
"<%= lang.code %>" => Some(Lang::<%= lang.code.capitalize %>),<% end %>
_ => None,
}
}
fn lang_to_code(lang: Lang) -> &'static str {
match lang {
<% langs.each do |lang| %>
Lang::<%= lang.code.capitalize %> => "<%= lang.code %>",<% end %>
}
}
fn lang_to_name(lang: Lang) -> &'static str {
match lang {
<% langs.each do |lang| %>
Lang::<%= lang.code.capitalize %> => "<%= lang.name %>",<% end %>
}
}
fn lang_to_eng_name(lang: Lang) -> &'static str {
match lang {
<% langs.each do |lang| %>
Lang::<%= lang.code.capitalize %> => "<%= lang.eng_name %>",<% end %>
}
}
impl Lang {
/// Get enum by ISO 639-3 code as a string.
///
/// # Example
/// ```
/// use whatlang::Lang;
/// assert_eq!(Lang::from_code("ukr"), Some(Lang::Ukr));
/// ```
pub fn from_code<S: Into<String>>(code: S) -> Option<Lang> {
lang_from_code(code)
}
/// Convert enum into ISO 639-3 code as a string.
///
/// # Example
/// ```
/// use whatlang::Lang;
/// assert_eq!(Lang::Ukr.code(), "ukr");
/// ```
pub fn code(&self) -> &'static str {
lang_to_code(*self)
}
/// Get a language name in the language itself.
///
/// # Example
/// ```
/// use whatlang::Lang;
/// assert_eq!(Lang::Ukr.name(), "Українська");
/// ```
pub fn name(self) -> &'static str {
lang_to_name(self)
}
/// Get a human readable name of the language in English.
///
/// # Example
/// ```
/// use whatlang::Lang;
/// assert_eq!(Lang::Deu.eng_name(), "German");
/// ```
pub fn eng_name(self) -> &'static str {
lang_to_eng_name(self)
}
/// Get all existing languages.
///
/// # Example
/// ```
/// use whatlang::Lang;
/// for lang in Lang::all() {
/// println!("{}", lang);
/// }
/// ```
pub fn all() -> &'static [Lang] {
&VALUES
}
}
impl fmt::Display for Lang {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.name())
}
}
impl FromStr for Lang {
type Err = ParseError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Lang::from_code(s).ok_or_else(|| ParseError::Lang(s.to_string()))
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_from_code() {
assert_eq!(Lang::from_code("rus".to_string()), Some(Lang::Rus));
assert_eq!(Lang::from_code("ukr"), Some(Lang::Ukr));
assert_eq!(Lang::from_code("ENG"), Some(Lang::Eng));
assert_eq!(Lang::from_code("oops"), None);
}
#[test]
fn test_code() {
assert_eq!(Lang::Spa.code(), "spa");
}
#[test]
fn test_name() {
assert_eq!(Lang::Rus.name(), "Русский");
assert_eq!(Lang::Spa.name(), "Español");
assert_eq!(Lang::Epo.name(), "Esperanto");
}
#[test]
fn test_eng_name() {
assert_eq!(Lang::Spa.eng_name(), "Spanish");
assert_eq!(Lang::Epo.eng_name(), "Esperanto");
assert_eq!(Lang::Rus.eng_name(), "Russian");
}
#[test]
fn test_all() {
assert_eq!(Lang::all().len(), <%= langs.size %>);
let all = Lang::all();
assert!(all.contains(&Lang::Ukr));
assert!(all.contains(&Lang::Swe));
}
#[test]
fn test_from_str() {
for &lang in Lang::all() {
let s = lang.code();
assert_eq!(s.parse::<Lang>().unwrap(), lang);
assert_eq!(s.to_lowercase().parse::<Lang>().unwrap(), lang);
assert_eq!(s.to_uppercase().parse::<Lang>().unwrap(), lang);
}
let result = "xyz".parse::<Lang>();
assert!(
matches!(
result,
Err(ParseError::Lang(_))
)
);
}
}