Add MolarVolume quantity with related units.

Author: crystal-growth

src/si/mod.rs

@@ -88,6 +88,7 @@ system! {
         molar_flux::MolarFlux,
         molar_heat_capacity::MolarHeatCapacity,
         molar_mass::MolarMass,
+        molar_volume::MolarVolume,
         momentum::Momentum,
         power::Power,
         pressure::Pressure,

src/si/molar_volume.rs

@@ -0,0 +1,63 @@
+//! Molar volume (base unit cubic meter per mole,  m³ · mol⁻¹).
+
+quantity! {
+    /// Molar volume (base unit cubic meter per mole,  m³ · mol⁻¹).
+    quantity: MolarVolume; "molar volume";
+    /// Dimension of molar volume, L³N⁻¹ (base unit cubic meter per mole,  m³ · mol⁻¹).
+    dimension: ISQ<
+        P3,     // length
+        Z0,     // mass
+        Z0,     // time
+        Z0,     // electric current
+        Z0,     // thermodynamic temperature
+        N1,     // amount of substance
+        Z0>;    // luminous intensity
+    units {
+        @cubic_meter_per_mole: prefix!(none); "m³/mol",
+            "cubic meter per mole", "cubic meters per mole";
+        @cubic_decimeter_per_mole: prefix!(deci) * prefix!(deci) * prefix!(deci); "dm³/mol",
+            "cubic decimeter per mole", "cubic decimeters per mole";               
+        @cubic_centimeter_per_mole: prefix!(centi) * prefix!(centi) * prefix!(centi); "cm³/mol",
+            "cubic centimeter per mole", "cubic centimeters per mole";            
+
+        @cubic_meter_per_particle: 6.022_140_76_E23; "m³/particle",
+            "cubic meter per particle", "cubic meters per particle";
+        @cubic_micrometer_per_particle: prefix!(micro) * prefix!(micro) * prefix!(micro) * 6.022_140_76_E23; "µm³/particle",
+            "cubic micrometer per particle", "cubic micrometers per particle";
+        @cubic_nanometer_per_particle: prefix!(nano) * prefix!(nano) * prefix!(nano) * 6.022_140_76_E23; "nm³/particle",
+            "cubic nanometer per particle", "cubic nanometers per particle";
+    }
+}
+
+#[cfg(test)]
+mod test {
+    storage_types! {
+        use crate::num::One;
+        use crate::si::amount_of_substance as aos;
+        use crate::si::molar_volume as mv;
+        use crate::si::quantities::*;
+        use crate::si::volume as v;
+        use crate::tests::Test;
+
+        #[test]
+        fn check_dimension() {
+            let _: MolarVolume<V> = Volume::new::<v::cubic_meter>(V::one())
+                / AmountOfSubstance::new::<aos::mole>(V::one());
+        }
+
+        #[test]
+        fn check_units() {
+            test::<v::cubic_meter, aos::mole,  mv::cubic_meter_per_mole>();
+            test::<v::cubic_decimeter, aos::mole,  mv::cubic_decimeter_per_mole>();
+            test::<v::cubic_centimeter, aos::mole,  mv::cubic_centimeter_per_mole>();
+            test::<v::cubic_meter, aos::particle,  mv::cubic_meter_per_particle>();
+            test::<v::cubic_micrometer, aos::particle,  mv::cubic_micrometer_per_particle>();
+            test::<v::cubic_nanometer, aos::particle,  mv::cubic_nanometer_per_particle>();
+
+            fn test<U: v::Conversion<V>, AOS: aos::Conversion<V>, MV: mv::Conversion<V>>() {
+                Test::assert_approx_eq(&MolarVolume::new::<MV>(V::one()),
+                    &(Volume::new::<U>(V::one()) / AmountOfSubstance::new::<AOS>(V::one()) ));
+            }
+        }
+    }
+}