From a0a18f35acb27d2abedafc62ca88a7075ff97294 Mon Sep 17 00:00:00 2001
From: Mateusz Pusz <mateusz.pusz@gmail.com>
Date: Sun, 23 Feb 2020 17:40:01 +0100
Subject: [PATCH] Momentum support added

---
 src/include/units/physical/dimensions.h  |  6 ++++
 src/include/units/physical/si/momentum.h | 46 ++++++++++++++++++++++++
 2 files changed, 52 insertions(+)
 create mode 100644 src/include/units/physical/si/momentum.h

diff --git a/src/include/units/physical/dimensions.h b/src/include/units/physical/dimensions.h
index c8202793..25d3f5ce 100644
--- a/src/include/units/physical/dimensions.h
+++ b/src/include/units/physical/dimensions.h
@@ -80,6 +80,9 @@ struct dim_acceleration : derived_dimension<Child, U, exp<L, 1>, exp<T, -2>> {};
 template<typename Child, Unit U, DimensionOf<dim_mass> M, DimensionOf<dim_acceleration> A>
 struct dim_force : derived_dimension<Child, U, exp<M, 1>, exp<A, 1>> {};
 
+template<typename Child, Unit U, DimensionOf<dim_mass> M, DimensionOf<dim_velocity> V>
+struct dim_momentum : derived_dimension<Child, U, exp<M, 1>, exp<V, 1>> {};
+
 template<typename Child, Unit U, DimensionOf<dim_force> F, DimensionOf<dim_length> L>
 struct dim_energy : derived_dimension<Child, U, exp<F, 1>, exp<L, 1>> {};
 
@@ -148,6 +151,9 @@ concept Acceleration = physical::QuantityOf<T, physical::dim_acceleration>;
 template<typename T>
 concept Force = physical::QuantityOf<T, physical::dim_force>;
 
+template<typename T>
+concept Momentum = physical::QuantityOf<T, physical::dim_momentum>;
+
 template<typename T>
 concept Energy = physical::QuantityOf<T, physical::dim_energy>;
 
diff --git a/src/include/units/physical/si/momentum.h b/src/include/units/physical/si/momentum.h
new file mode 100644
index 00000000..7b9b709c
--- /dev/null
+++ b/src/include/units/physical/si/momentum.h
@@ -0,0 +1,46 @@
+// The MIT License (MIT)
+//
+// Copyright (c) 2018 Mateusz Pusz
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in all
+// copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+// SOFTWARE.
+
+#pragma once
+
+#include <units/physical/dimensions.h>
+#include <units/physical/si/mass.h>
+#include <units/physical/si/velocity.h>
+#include <units/quantity.h>
+
+namespace units::si {
+
+struct kilogram_metre_per_second : unit<kilogram_metre_per_second> {};
+struct dim_momentum : physical::dim_momentum<dim_momentum, kilogram_metre_per_second, dim_mass, dim_velocity> {};
+
+template<Unit U, Scalar Rep = double>
+using momentum = quantity<dim_momentum, U, Rep>;
+
+inline namespace literals {
+
+// kgmps
+constexpr auto operator"" q_kgmps(unsigned long long l) { return momentum<kilogram_metre_per_second, std::int64_t>(l); }
+constexpr auto operator"" q_kgmps(long double l) { return momentum<kilogram_metre_per_second, long double>(l); }
+
+}  // namespace literals
+
+}  // namespace units::si