1 files changed, 70 insertions, 0 deletions
diff --git a/src/volume/mod.rs b/src/volume/mod.rs
new file mode 100644
index 0000000..0f36454
--- /dev/null
+++ b/src/volume/mod.rs
@@ -0,0 +1,70 @@
+mod cubic_centimetre;
+mod cubic_metre;
+mod litre;
+mod unit;
+
+pub use cubic_centimetre::CubicCentimetre;
+pub use cubic_metre::CubicMetre;
+pub use litre::Litre;
+pub use unit::Unit;
+
+pub fn convert<F: Into<f64>>(val: F, from: Unit, to: Unit) -> f64 {
+    match from {
+        Unit::CubicMetre => match to {
+            Unit::CubicMetre => val.into(),
+            Unit::Litre => Litre::from(CubicMetre(val.into())).0,
+            Unit::CubicCentimetre => CubicCentimetre::from(CubicMetre(val.into())).0,
+        },
+        Unit::Litre => match to {
+            Unit::Litre => val.into(),
+            Unit::CubicMetre => CubicMetre::from(Litre(val.into())).0,
+            Unit::CubicCentimetre => CubicCentimetre::from(Litre(val.into())).0,
+        },
+        Unit::CubicCentimetre => match to {
+            Unit::CubicCentimetre => val.into(),
+            Unit::CubicMetre => CubicMetre::from(CubicCentimetre(val.into())).0,
+            Unit::Litre => Litre::from(CubicCentimetre(val.into())).0,
+        },
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{CubicCentimetre, CubicMetre, Litre};
+
+    #[test]
+    fn cubic_metre_to_litre() {
+        assert_eq!(Litre::from(CubicMetre(1.)), Litre(1000.));
+    }
+
+    #[test]
+    fn cubic_metre_to_cubic_centimetre() {
+        assert_eq!(
+            CubicCentimetre::from(CubicMetre(1.)),
+            CubicCentimetre(1_000_000.)
+        );
+    }
+
+    #[test]
+    fn litre_to_cubic_metre() {
+        assert_eq!(CubicMetre::from(Litre(1000.)), CubicMetre(1.));
+    }
+
+    #[test]
+    fn litre_to_cubic_centimetre() {
+        assert_eq!(CubicCentimetre::from(Litre(1.)), CubicCentimetre(1000.));
+    }
+
+    #[test]
+    fn cubic_centimetre_to_cubic_metre() {
+        assert_eq!(
+            CubicMetre::from(CubicCentimetre(1_000_000.)),
+            CubicMetre(1.)
+        );
+    }
+
+    #[test]
+    fn cubic_centimetre_to_litre() {
+        assert_eq!(Litre::from(CubicCentimetre(1000.)), Litre(1.));
+    }
+}