Add ElectricFlux quantity with related units.

src/si/electric_flux.rs

@@ -0,0 +1,51 @@
+//! Electric Flux (base unit volt meter, m³ ⋅ kg ⋅ s⁻³ ⋅ A⁻¹).
+
+quantity! {
+    /// Electric Flux (base unit volt meter, m³ ⋅ kg ⋅ s⁻³ ⋅ A⁻¹).
+    quantity: ElectricFlux; "electric flux";
+    /// Dimension of electric flux, L³MT⁻³I⁻¹ (base unit volt meter, m³ ⋅ kg ⋅ s⁻³ ⋅ A⁻¹).
+    dimension: ISQ<
+        P3,     // length
+        P1,     // mass
+        N3,     // time
+        N1,     // electric current
+        Z0,     // thermodynamic temperature
+        Z0,     // amount of substance
+        Z0>;    // luminous intensity
+    units {
+        @volt_meter: prefix!(none); "V⋅m",
+            "volt meter", "volt meters";
+        @volt_centimeter: prefix!(none) * prefix!(centi); "V⋅cm",
+            "volt centimeter", "volt centimeters";
+    }
+}
+
+#[cfg(test)]
+mod test {
+    storage_types! {
+        use crate::num::One;
+        use crate::si::electric_flux as ef;
+        use crate::si::quantities::*;
+        use crate::si::electric_potential as ep;
+        use crate::si::length as l;
+        use crate::tests::Test;
+
+        #[test]
+        fn check_dimension() {
+            let _: ElectricFlux<V> = ElectricPotential::new::<ep::volt>(V::one())
+                * Length::new::<l::meter>(V::one());
+        }
+
+        #[test]
+        fn check_units() {
+            test::<ef::volt_meter, l::meter, ep::volt>();
+            test::<ef::volt_centimeter, l::centimeter, ep::volt>();
+
+            fn test<EF: ef::Conversion<V>, L: l::Conversion<V>, EP: ep::Conversion<V>>() {
+                Test::assert_approx_eq(&ElectricFlux::new::<EF>(V::one()),
+                    &(ElectricPotential::new::<EP>(V::one())
+                        * Length::new::<L>(V::one())));
+            }
+        }
+    }
+}

src/si/mod.rs

@@ -61,6 +61,7 @@ system! {
         diffusion_coefficient::DiffusionCoefficient,
         electric_charge::ElectricCharge,
         electric_current::ElectricCurrent,
+        electric_flux::ElectricFlux,
         electric_potential::ElectricPotential,
         electrical_conductance::ElectricalConductance,
         electrical_resistance::ElectricalResistance,