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use language_tags::LanguageTag;
use super::parser::Parse;
impl Parse for bool {
fn parse(text: &str, language: &LanguageTag) -> Option<bool> {
let en = langtag!(en);
match &*text.to_lowercase() {
"1" => Some(true),
"0" => Some(false),
"ok" | "okay" | "on" | "true" | "yep" | "yes" if language.matches(&en) => Some(true),
"false" | "no" | "nope" | "off" if language.matches(&en) => Some(false),
_ => None,
}
}
}
#[cfg(test)]
mod tests {
use {parse, parse_with_language};
#[test]
fn basic() {
assert_eq!(Some(true), parse::<bool>("1"));
assert_eq!(Some(true), parse::<bool>("ok"));
assert_eq!(Some(true), parse::<bool>("okay"));
assert_eq!(Some(true), parse::<bool>("on"));
assert_eq!(Some(true), parse::<bool>("true"));
assert_eq!(Some(true), parse::<bool>("yep"));
assert_eq!(Some(true), parse::<bool>("yes"));
assert_eq!(Some(false), parse::<bool>("0"));
assert_eq!(Some(false), parse::<bool>("false"));
assert_eq!(Some(false), parse::<bool>("no"));
assert_eq!(Some(false), parse::<bool>("nope"));
assert_eq!(Some(false), parse::<bool>("off"));
let badlang = langtag!("no");
assert_eq!(Some(true), parse_with_language::<bool>("1", &badlang));
assert_eq!(Some(false), parse_with_language::<bool>("0", &badlang));
assert_eq!(None, parse_with_language::<bool>("okay", &badlang));
assert_eq!(None, parse_with_language::<bool>("nope", &badlang));
}
}