Function pluralize 

pub fn pluralize(noun: &NounEntry) -> String

Computes the plural form of a noun.

Returns the irregular plural if one is defined in the noun’s forms map under the "plural" key. Otherwise, applies English pluralization rules:

• Sibilants (-s, -x, -ch, -sh) → append -es (“box” → “boxes”)
• Consonant + y → replace y with -ies (“city” → “cities”)
• Vowel + y (-ay, -ey, -oy, -uy) → append -s (“day” → “days”)
• Default → append -s (“dog” → “dogs”)

Arguments

• noun - The noun entry containing the lemma and optional irregular forms.

Examples

use logicaffeine_lexicon::runtime::{NounEntry, pluralize};
use std::collections::HashMap;

// Regular noun
let dog = NounEntry {
    lemma: "dog".to_string(),
    forms: HashMap::new(),
    features: vec![],
    sort: None,
};
assert_eq!(pluralize(&dog), "dogs");

// Irregular noun
let mouse = NounEntry {
    lemma: "mouse".to_string(),
    forms: [("plural".to_string(), "mice".to_string())].into(),
    features: vec![],
    sort: None,
};
assert_eq!(pluralize(&mouse), "mice");