55 lines
1.1 KiB
Rust
55 lines
1.1 KiB
Rust
|
|
||
|
|
#[derive(Debug)]
|
||
|
|
pub struct IdNumber(usize);
|
||
|
|
#[derive(Debug)]
|
||
|
|
pub struct IdString(String);
|
||
|
|
#[derive(Debug)]
|
||
|
|
pub struct NoId();
|
||
|
|
|
||
|
|
#[derive(Debug, PartialEq)]
|
||
|
|
pub enum IdValue {
|
||
|
|
Number(usize),
|
||
|
|
String(String)
|
||
|
|
}
|
||
|
|
|
||
|
|
pub trait MayId {
|
||
|
|
fn is_id() -> bool;
|
||
|
|
fn get_value(&self) -> Option<IdValue>;
|
||
|
|
}
|
||
|
|
|
||
|
|
impl MayId for IdNumber {
|
||
|
|
fn is_id() -> bool {
|
||
|
|
true
|
||
|
|
}
|
||
|
|
fn get_value(&self) -> Option<IdValue> {
|
||
|
|
Some(IdValue::Number(self.0))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
impl MayId for IdString {
|
||
|
|
fn is_id() -> bool {
|
||
|
|
true
|
||
|
|
}
|
||
|
|
fn get_value(&self) -> Option<IdValue> {
|
||
|
|
Some(IdValue::String(self.0.clone()))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
impl MayId for NoId {
|
||
|
|
fn is_id() -> bool {
|
||
|
|
false
|
||
|
|
}
|
||
|
|
fn get_value(&self) -> Option<IdValue> {
|
||
|
|
None
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#[cfg(test)]
|
||
|
|
mod tests {
|
||
|
|
use super::*;
|
||
|
|
#[test]
|
||
|
|
fn parse_values() {
|
||
|
|
assert_eq!(Some(IdValue::Number(1)), IdNumber(1).get_value());
|
||
|
|
assert_eq!(Some(IdValue::String("Test".to_string())), IdString("Test".to_string()).get_value());
|
||
|
|
assert_eq!(None, NoId().get_value());
|
||
|
|
}
|
||
|
|
}
|