[Sync Iteration] rust/space-age/1

solutions/rust/space-age/1/src/lib.rs

@@ -0,0 +1,89 @@
+// The code below is a stub. Just enough to satisfy the compiler.
+// In order to pass the tests you can add-to or change any of this code.
+
+#[derive(Debug)]
+pub struct Duration {
+    earth_years: f64,
+}
+
+impl From<u64> for Duration {
+    fn from(s: u64) -> Self {
+        const SECONDS_IN_HOUR: f64 = 3600.0;
+        const HOURS_IN_DAY: f64 = 24.0;
+        const DAYS_IN_YEAR: f64 = 365.25;
+
+        Duration {
+            earth_years: s as f64 / (SECONDS_IN_HOUR * HOURS_IN_DAY * DAYS_IN_YEAR),
+        }
+    }
+}
+
+pub trait Planet {
+    fn years_during(d: &Duration) -> f64 {
+        todo!("convert a duration ({d:?}) to the number of years on this planet for that duration");
+    }
+}
+
+pub struct Mercury;
+pub struct Venus;
+pub struct Earth;
+pub struct Mars;
+pub struct Jupiter;
+pub struct Saturn;
+pub struct Uranus;
+pub struct Neptune;
+
+impl Planet for Mercury {
+    fn years_during(d: &Duration) -> f64 {
+        const EARTH_YEARS_ON_MERCURY: f64 = 0.2408467;
+
+        d.earth_years / EARTH_YEARS_ON_MERCURY
+    }
+}
+impl Planet for Venus {
+    fn years_during(d: &Duration) -> f64 {
+        const EARTH_YEARS_ON_VENUS: f64 = 0.61519726;
+
+        d.earth_years / EARTH_YEARS_ON_VENUS
+    }
+}
+impl Planet for Earth {
+    fn years_during(d: &Duration) -> f64 {
+        d.earth_years
+    }
+}
+impl Planet for Mars {
+    fn years_during(d: &Duration) -> f64 {
+        const EARTH_YEARS_ON_MARS: f64 = 1.8808158;
+
+        d.earth_years / EARTH_YEARS_ON_MARS
+    }
+}
+impl Planet for Jupiter {
+    fn years_during(d: &Duration) -> f64 {
+        const EARTH_YEARS_ON_JUPITER: f64 = 11.862615;
+
+        d.earth_years / EARTH_YEARS_ON_JUPITER
+    }
+}
+impl Planet for Saturn {
+    fn years_during(d: &Duration) -> f64 {
+        const EARTH_YEARS_ON_SATURN: f64 = 29.447498;
+
+        d.earth_years / EARTH_YEARS_ON_SATURN
+    }
+}
+impl Planet for Uranus {
+    fn years_during(d: &Duration) -> f64 {
+        const EARTH_YEARS_ON_URANUS: f64 = 84.016846;
+
+        d.earth_years / EARTH_YEARS_ON_URANUS
+    }
+}
+impl Planet for Neptune {
+    fn years_during(d: &Duration) -> f64 {
+        const EARTH_YEARS_ON_NEPTUNE: f64 = 164.79132;
+
+        d.earth_years / EARTH_YEARS_ON_NEPTUNE
+    }
+}