duckling 0.4.0

A Rust port of Facebook's Duckling library for parsing natural language into structured data
Documentation 
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use crate::pattern::regex;
use crate::types::{Rule, TokenData};

use super::OrdinalData;

fn ord(s: &str) -> Option<i64> {
    match s.to_lowercase().as_str() {
        "första" | "förste" => Some(1),
        "andra" | "andre" => Some(2),
        "tredje" => Some(3),
        "fjärde" => Some(4),
        "femte" => Some(5),
        "sjätte" => Some(6),
        "sjunde" => Some(7),
        "åttonde" => Some(8),
        "nionde" => Some(9),
        "tionde" => Some(10),
        "elfte" => Some(11),
        "tolfte" => Some(12),
        "trettonde" => Some(13),
        "fjortonde" => Some(14),
        "femtonde" => Some(15),
        "sextonde" => Some(16),
        "sjuttonde" => Some(17),
        "artonde" => Some(18),
        "nittonde" => Some(19),
        "tjugonde" => Some(20),
        "trettionde" => Some(30),
        "fyrtionde" => Some(40),
        "femtionde" => Some(50),
        "sextionde" => Some(60),
        "sjuttionde" => Some(70),
        "åttionde" => Some(80),
        "nittionde" => Some(90),
        _ => None,
    }
}
fn card(s: &str) -> Option<i64> {
    match s.to_lowercase().as_str() {
        "tjugo" => Some(20),
        "trettio" => Some(30),
        "fyrtio" => Some(40),
        "femtio" => Some(50),
        "sextio" => Some(60),
        "sjuttio" => Some(70),
        "åttio" => Some(80),
        "nittio" => Some(90),
        _ => None,
    }
}

pub fn rules() -> Vec<Rule> {
    vec![
    Rule{name:"ordinals (first..twentieth,thirtieth,...)".to_string(),pattern:vec![regex("(första|förste|andra|andre|tredje|fjärde|femte|sjätte|sjunde|åttonde|nionde|tionde|elfte|tolfte|trettionde|fjortonde|femtonde|sextonde|sjuttonde|artonde|nittonde|tjugonde|trettionde|fyrtionde|femtonde|sextionde|sjuttionde|åttionde|nittionde)")],production:Box::new(|n|{let s=match &n[0].token_data{TokenData::RegexMatch(m)=>m.group(1)?,_=>return None};Some(TokenData::Ordinal(OrdinalData::new(ord(s)?)))})},
    Rule{name:"ordinals (composite, e.g., eighty-seven)".to_string(),pattern:vec![regex("(tjugo|trettio|fyrtio|femtio|sextio|sjuttio|åttio|nittio)(första|förste|andra|andre|tredje|fjärde|femte|sjätte|sjunde|åttonde|nionde)")],production:Box::new(|n|{let m=match &n[0].token_data{TokenData::RegexMatch(m)=>m,_=>return None};Some(TokenData::Ordinal(OrdinalData::new(card(m.group(1)?)?.checked_add(ord(m.group(2)?)?)?)))})},
    Rule{name:"ordinal (digits)".to_string(),pattern:vec![regex("0*(\\d+):?(a|e)")],production:Box::new(|n|{let v: i64=match &n[0].token_data{TokenData::RegexMatch(m)=>m.group(1)?.parse().ok()?,_=>return None};Some(TokenData::Ordinal(OrdinalData::new(v)))})},
]
}