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use serde;
use serde::Serialize;
pub enum DistanceUnit {
Inches,
Yards,
Miles,
Kilometers,
Meters,
Centimeters,
Millimeters,
}
pub struct Distance(pub f32, pub DistanceUnit);
impl ToString for Distance {
fn to_string(&self) -> String {
let value = self.0.to_string();
let unit = match self.1 {
DistanceUnit::Inches => "in",
DistanceUnit::Yards => "yd",
DistanceUnit::Miles => "mi",
DistanceUnit::Kilometers => "km",
DistanceUnit::Meters => "m",
DistanceUnit::Centimeters => "cm",
DistanceUnit::Millimeters => "mm",
};
let mut s = String::with_capacity(value.len() + unit.len());
s.push_str(&value);
s.push_str(unit);
s
}
}
impl Serialize for Distance {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
serializer.serialize_str(&self.to_string())
}
}