Add LinearMassDensity and ArealMassDensity quantities with related un…

…its.

src/si/areal_mass_density.rs

@@ -0,0 +1,58 @@
+//! Areal mass density (base unit kilogram per square meter, m⁻² · kg).
+
+quantity! {
+    /// Areal mass density (base unit kilogram per square meter, m⁻² · kg).
+    quantity: ArealMassDensity; "areal mass density";
+    /// Dimension of areal mass density, L⁻²M (base unit kilogram per square meter, m⁻² · kg).
+    dimension: ISQ<
+        N2,     // length
+        P1,     // mass
+        Z0,     // time
+        Z0,     // electric current
+        Z0,     // thermodynamic temperature
+        Z0,     // amount of substance
+        Z0>;    // luminous intensity
+    units {
+        @kilogram_per_square_meter: prefix!(none); "kg/m²", "kilogram per square meter",
+            "kilograms per square meter";
+        @gram_per_square_meter: prefix!(milli); "g/m²", "gram per square meter",
+            "grams per square meter";
+        @gram_per_square_centimeter: prefix!(milli) / prefix!(centi) / prefix!(centi); "g/cm²",
+            "gram per square centimeter", "grams per square centimeter";
+
+        @ounce_per_square_foot: 2.834_952_E-2 / 9.290_304_E-2; "oz/ft²", "ounce per square foot",
+            "ounces per square foot";
+    }
+}
+
+#[cfg(test)]
+mod test {
+    storage_types! {
+        use crate::num::One;
+        use crate::si::mass as m;
+        use crate::si::areal_mass_density as d;
+        use crate::si::quantities::*;
+        use crate::si::area as a;
+        use crate::tests::Test;
+
+        #[test]
+        fn check_dimension() {
+            let _: ArealMassDensity<V> = Mass::new::<m::kilogram>(V::one())
+                / Area::new::<a::square_meter>(V::one());
+        }
+
+        #[test]
+        fn check_units() {
+            test::<m::kilogram, a::square_meter, d::kilogram_per_square_meter>();
+            test::<m::gram, a::square_meter, d::gram_per_square_meter>();
+            test::<m::gram, a::square_centimeter, d::gram_per_square_centimeter>();
+
+            test::<m::ounce, a::square_foot, d::ounce_per_square_foot>();
+
+            fn test<M: m::Conversion<V>, A: a::Conversion<V>, D: d::Conversion<V>>() {
+                Test::assert_approx_eq(&ArealMassDensity::new::<D>(V::one()),
+                    &(Mass::new::<M>(V::one()) / Area::new::<A>(V::one())));
+            }
+        }
+    }
+}

src/si/linear_mass_density.rs

@@ -0,0 +1,64 @@
+//! Linear mass density (base unit kilogram per meter, m⁻¹ · kg).
+
+quantity! {
+    /// Linear mass density (base unit kilogram per meter, m⁻¹ · kg).
+    quantity: LinearMassDensity; "linear mass density";
+    /// Dimension of linear mass density, L⁻¹M (base unit kilogram per meter, m⁻¹ · kg).
+    dimension: ISQ<
+        N1,     // length
+        P1,     // mass
+        Z0,     // time
+        Z0,     // electric current
+        Z0,     // thermodynamic temperature
+        Z0,     // amount of substance
+        Z0>;    // luminous intensity
+    units {
+        @kilogram_per_meter: prefix!(none); "kg/m", "kilogram per meter", "kilograms per meter";
+        @gram_per_kilometer: prefix!(milli) / prefix!(kilo); "g/km", "gram per kilometer",
+            "grams per kilometer";
+        @gram_per_centimeter: prefix!(milli) / prefix!(centi); "g/cm", "gram per centimeter",
+            "grams per centimeter";
+
+        @ounce_per_foot: 2.834_952_E-2 / 3.048_E-1; "oz/ft", "ounce per foot", "ounces per foot";
+        @ounce_per_inch: 2.834_952_E-2 / 2.54_E-2; "oz/in", "ounce per inch", "ounces per inch";
+        @pound_per_yard: 4.535_924_E-1 / 9.144_E-1; "lb/yd", "pound per yard", "pounds per yard";
+        @pound_per_foot: 4.535_924_E-1 / 3.048_E-1; "lb/ft", "pound per foot", "pounds per foot";
+        @pound_per_inch: 4.535_924_E-1 / 2.54_E-2; "lb/in", "pound per inch", "pounds per inch";
+    }
+}
+
+#[cfg(test)]
+mod test {
+    storage_types! {
+        use crate::num::One;
+        use crate::si::mass as m;
+        use crate::si::linear_mass_density as d;
+        use crate::si::quantities::*;
+        use crate::si::length as l;
+        use crate::tests::Test;
+
+        #[test]
+        fn check_dimension() {
+            let _: LinearMassDensity<V> = Mass::new::<m::kilogram>(V::one())
+                / Length::new::<l::meter>(V::one());
+        }
+
+        #[test]
+        fn check_units() {
+            test::<m::kilogram, l::meter, d::kilogram_per_meter>();
+            test::<m::gram, l::kilometer, d::gram_per_kilometer>();
+            test::<m::gram, l::centimeter, d::gram_per_centimeter>();
+
+            test::<m::ounce, l::foot, d::ounce_per_foot>();
+            test::<m::ounce, l::inch, d::ounce_per_inch>();
+            test::<m::pound, l::yard, d::pound_per_yard>();
+            test::<m::pound, l::foot, d::pound_per_foot>();
+            test::<m::pound, l::inch, d::pound_per_inch>();
+
+            fn test<M: m::Conversion<V>, L: l::Conversion<V>, D: d::Conversion<V>>() {
+                Test::assert_approx_eq(&LinearMassDensity::new::<D>(V::one()),
+                    &(Mass::new::<M>(V::one()) / Length::new::<L>(V::one())));
+            }
+        }
+    }
+}

src/si/mod.rs

@@ -53,6 +53,7 @@ system! {
         angular_jerk::AngularJerk,
         angular_velocity::AngularVelocity,
         area::Area,
+        areal_mass_density::ArealMassDensity,
         available_energy::AvailableEnergy,
         capacitance::Capacitance,
         catalytic_activity::CatalyticActivity,
@@ -79,6 +80,7 @@ system! {
         information_rate::InformationRate,
         jerk::Jerk,
         length::Length,
+        linear_mass_density::LinearMassDensity,
         luminance::Luminance,
         luminous_intensity::LuminousIntensity,
         magnetic_flux::MagneticFlux,