From 0a730a7b69e694d34e16375bdfc822ceb439c149 Mon Sep 17 00:00:00 2001
From: "M@ Dunlap" <mrd@vicarious.com>
Date: Fri, 10 May 2019 11:41:21 -0700
Subject: [PATCH] Add `AngularVelocity`.

---
 src/si/angle.rs            |  3 +--
 src/si/angular_velocity.rs | 54 ++++++++++++++++++++++++++++++++++++++
 src/si/mod.rs              |  1 +
 3 files changed, 56 insertions(+), 2 deletions(-)
 create mode 100644 src/si/angular_velocity.rs

diff --git a/src/si/angle.rs b/src/si/angle.rs
index 4d827192..7830bd06 100644
--- a/src/si/angle.rs
+++ b/src/si/angle.rs
@@ -62,8 +62,7 @@ mod convert {
 mod tests {
     storage_types! {
         use ::lib::f64::consts::PI;
-        use num::One;
-        use num_traits::FromPrimitive;
+        use num::{FromPrimitive, One};
         use si::angle as a;
         use si::quantities::*;
         use tests::Test;
diff --git a/src/si/angular_velocity.rs b/src/si/angular_velocity.rs
new file mode 100644
index 00000000..000cd927
--- /dev/null
+++ b/src/si/angular_velocity.rs
@@ -0,0 +1,54 @@
+//! Angular velocity (base unit radian per second, s⁻¹).
+
+quantity! {
+    /// Angular velocity (base unit radian per second, s⁻¹).
+    quantity: AngularVelocity; "angular velocity";
+    /// Dimension of angular velocity, T⁻¹ (base unit radian per second, s⁻¹).
+    dimension: ISQ<
+        Z0,     // length
+        Z0,     // mass
+        N1,     // time
+        Z0,     // electric current
+        Z0,     // thermodynamic temperature
+        Z0,     // amount of substance
+        Z0>;    // luminous intensity
+    kind: ::si::marker::AngleKind;
+    units {
+        /// Derived unit of angular velocity.
+        @radian_per_second: 1.0_E0; "rad/s", "radian per second", "radians per second";
+        @degree_per_second: 1.745_329_251_994_329_5_E-2; "°/s", "degree per second",
+            "degrees per second";
+        @revolution_per_second: 6.283_185_307_179_586_E0; "rps", "revolution per second",
+            "revolutions per second";
+        @revolution_per_minute: 1.047_197_551_196_597_7_E-1; "rpm", "revolution per minute",
+            "revolutions per minute";
+        @revolution_per_hour: 1.745_329_251_994_329_6_E-3; "rph", "revolution per hour",
+            "revolutions per hour";
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    storage_types! {
+        use num::One;
+        use si::angle as a;
+        use si::angular_velocity as v;
+        use si::quantities::*;
+        use si::time as t;
+        use tests::Test;
+
+        #[test]
+        fn check_units() {
+            test::<a::radian, t::second, v::radian_per_second>();
+            test::<a::degree, t::second, v::degree_per_second>();
+            test::<a::revolution, t::second, v::revolution_per_second>();
+            test::<a::revolution, t::minute, v::revolution_per_minute>();
+            test::<a::revolution, t::hour, v::revolution_per_hour>();
+
+            fn test<A: a::Conversion<V>, T: t::Conversion<V>, R: v::Conversion<V>>() {
+                Test::assert_approx_eq(&AngularVelocity::new::<R>(V::one()),
+                    &(Angle::new::<A>(V::one()) / Time::new::<T>(V::one())).into());
+            }
+        }
+    }
+}
diff --git a/src/si/mod.rs b/src/si/mod.rs
index 247ccaba..148f9781 100644
--- a/src/si/mod.rs
+++ b/src/si/mod.rs
@@ -38,6 +38,7 @@ system! {
         acceleration::Acceleration,
         amount_of_substance::AmountOfSubstance,
         angle::Angle,
+        angular_velocity::AngularVelocity,
         area::Area,
         available_energy::AvailableEnergy,
         capacitance::Capacitance,