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use serde::{Deserialize, Serialize};
use std::fmt;
#[derive(
Debug, Copy, Clone, Serialize, Hash, Eq, PartialEq, Default, Deserialize, PartialOrd, Ord,
)]
#[serde(from = "i32")]
pub struct ProvinceId(i32);
impl ProvinceId {
pub fn new(x: i32) -> Self {
ProvinceId(x.abs())
}
pub fn as_u16(&self) -> u16 {
self.0 as u16
}
}
impl From<i32> for ProvinceId {
fn from(x: i32) -> Self {
ProvinceId::new(x)
}
}
impl fmt::Display for ProvinceId {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{}", self.0)
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn province_order() {
assert!(ProvinceId::from(1) < ProvinceId::from(2));
assert!(ProvinceId::from(1) < ProvinceId::from(-2));
}
}