refactor: natural units refactored

docs/CMakeLists.txt

@@ -138,8 +138,15 @@ set(unitsSphinxDocs
     "${CMAKE_CURRENT_SOURCE_DIR}/reference/systems/isq/iec80000/transfer_rate.rst"
 
     "${CMAKE_CURRENT_SOURCE_DIR}/reference/systems/isq/natural.rst"
+    "${CMAKE_CURRENT_SOURCE_DIR}/reference/systems/isq/natural/acceleration.rst"
     "${CMAKE_CURRENT_SOURCE_DIR}/reference/systems/isq/natural/constants.rst"
-    "${CMAKE_CURRENT_SOURCE_DIR}/reference/systems/isq/natural/dimensions.rst"
+    "${CMAKE_CURRENT_SOURCE_DIR}/reference/systems/isq/natural/energy.rst"
+    "${CMAKE_CURRENT_SOURCE_DIR}/reference/systems/isq/natural/force.rst"
+    "${CMAKE_CURRENT_SOURCE_DIR}/reference/systems/isq/natural/length.rst"
+    "${CMAKE_CURRENT_SOURCE_DIR}/reference/systems/isq/natural/mass.rst"
+    "${CMAKE_CURRENT_SOURCE_DIR}/reference/systems/isq/natural/momentum.rst"
+    "${CMAKE_CURRENT_SOURCE_DIR}/reference/systems/isq/natural/speed.rst"
+    "${CMAKE_CURRENT_SOURCE_DIR}/reference/systems/isq/natural/time.rst"
     "${CMAKE_CURRENT_SOURCE_DIR}/reference/systems/isq/natural/units.rst"
 
     "${CMAKE_CURRENT_SOURCE_DIR}/reference/systems/isq/si_cgs.rst"

docs/reference/systems/isq/natural.rst

@@ -4,6 +4,13 @@ Natural
 .. toctree::
     :maxdepth: 2
 
-    natural/dimensions
     natural/units
     natural/constants
+    natural/acceleration
+    natural/energy
+    natural/force
+    natural/length
+    natural/mass
+    natural/momentum
+    natural/speed
+    natural/time

docs/reference/systems/isq/natural/acceleration.rst

@@ -0,0 +1,4 @@
+Acceleration
+============
+
+.. doxygenfile:: natural/acceleration.h

docs/reference/systems/isq/natural/dimensions.rst

@@ -1,4 +0,0 @@
-Dimensions
-==========
-
-.. doxygenfile:: natural/dimensions.h

docs/reference/systems/isq/natural/energy.rst

@@ -0,0 +1,4 @@
+Energy
+======
+
+.. doxygenfile:: natural/energy.h

docs/reference/systems/isq/natural/force.rst

@@ -0,0 +1,4 @@
+Force
+=====
+
+.. doxygenfile:: natural/force.h

docs/reference/systems/isq/natural/length.rst

@@ -0,0 +1,4 @@
+Length
+======
+
+.. doxygenfile:: natural/length.h

docs/reference/systems/isq/natural/mass.rst

@@ -0,0 +1,4 @@
+Mass
+====
+
+.. doxygenfile:: natural/mass.h

docs/reference/systems/isq/natural/momentum.rst

@@ -0,0 +1,4 @@
+Momentum
+========
+
+.. doxygenfile:: natural/momentum.h

docs/reference/systems/isq/natural/speed.rst

@@ -0,0 +1,4 @@
+Speed
+=====
+
+.. doxygenfile:: natural/speed.h

docs/reference/systems/isq/natural/time.rst

@@ -0,0 +1,4 @@
+Time
+====
+
+.. doxygenfile:: natural/time.h

src/systems/isq-natural/include/units/isq/natural/acceleration.h

@@ -22,47 +22,48 @@
 
 #pragma once
 
+#include <units/isq/natural/length.h>
+#include <units/isq/natural/time.h>
+
 // IWYU pragma: begin_exports
-#include <units/isq/dimensions.h>
+#include <units/isq/dimensions/acceleration.h>
 #include <units/isq/natural/units.h>
 #include <units/quantity.h>
+#include <units/reference.h>
+#include <units/symbol_text.h>
 // IWYU pragma: end_exports
 
 namespace units::isq::natural {
 
-struct dim_length : isq::dim_length<inverted_gigaelectronvolt> {};
-template<UnitOf<dim_length> U, Representation Rep = double>
-using length = quantity<dim_length, U, Rep>;
-
-struct dim_time : isq::dim_time<inverted_gigaelectronvolt> {};
-template<UnitOf<dim_time> U, Representation Rep = double>
-using time = quantity<dim_time, U, Rep>;
-
-struct dim_mass : isq::dim_mass<gigaelectronvolt> {};
-template<UnitOf<dim_mass> U, Representation Rep = double>
-using mass = quantity<dim_mass, U, Rep>;
-
-struct dim_speed : isq::dim_speed<dim_speed, one, dim_length, dim_time> {};
-template<UnitOf<dim_speed> U, Representation Rep = double>
-using speed = quantity<dim_speed, U, Rep>;
-
 struct dim_acceleration : isq::dim_acceleration<dim_acceleration, gigaelectronvolt, dim_length, dim_time> {};
+
 template<UnitOf<dim_acceleration> U, Representation Rep = double>
 using acceleration = quantity<dim_acceleration, U, Rep>;
 
-struct dim_force : isq::dim_force<dim_force, square_gigaelectronvolt, dim_mass, dim_acceleration> {};
-template<UnitOf<dim_force> U, Representation Rep = double>
-using force = quantity<dim_force, U, Rep>;
+#ifdef UNITS_REFERENCES
 
-struct dim_momentum : isq::dim_momentum<dim_momentum, gigaelectronvolt, dim_mass, dim_speed> {};
-template<UnitOf<dim_momentum> U, Representation Rep = double>
-using momentum = quantity<dim_momentum, U, Rep>;
+namespace acceleration_references {
 
-struct dim_energy : isq::dim_energy<dim_energy, gigaelectronvolt, dim_force, dim_length> {};
-template<UnitOf<dim_force> U, Representation Rep = double>
-using energy = quantity<dim_force, U, Rep>;
+inline constexpr auto GeV = reference<dim_acceleration, gigaelectronvolt>{};
 
-// Typical UDLs will not work here as the same units are reused by many quantities.
-// Should we define some strange ones (i.e. _q_mass_GeV)?
+}  // namespace acceleration_references
+
+namespace references { 
+
+using namespace acceleration_references;
+
+}  // namespace references
+
+#endif // UNITS_REFERENCES
 
 }  // namespace units::isq::natural
+
+#ifdef UNITS_ALIASES
+
+namespace units::aliases::isq::natural::inline acceleration {
+
+template<Representation Rep = double> using GeV = units::isq::natural::acceleration<units::isq::natural::gigaelectronvolt, Rep>;
+
+}  // namespace units::aliases::isq::natural::inline acceleration
+
+#endif // UNITS_ALIASES

src/systems/isq-natural/include/units/isq/natural/constants.h

@@ -22,7 +22,7 @@
 
 #pragma once
 
-#include <units/isq/natural/dimensions.h>
+#include <units/isq/natural/speed.h>
 
 namespace units::isq::natural {
 

src/systems/isq-natural/include/units/isq/natural/energy.h

@@ -0,0 +1,69 @@
+// 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/isq/natural/force.h>
+#include <units/isq/natural/length.h>
+
+// IWYU pragma: begin_exports
+#include <units/isq/dimensions/energy.h>
+#include <units/isq/natural/units.h>
+#include <units/quantity.h>
+#include <units/reference.h>
+#include <units/symbol_text.h>
+// IWYU pragma: end_exports
+
+namespace units::isq::natural {
+
+struct dim_energy : isq::dim_energy<dim_energy, gigaelectronvolt, dim_force, dim_length> {};
+
+template<UnitOf<dim_energy> U, Representation Rep = double>
+using energy = quantity<dim_energy, U, Rep>;
+
+#ifdef UNITS_REFERENCES
+
+namespace energy_references {
+
+inline constexpr auto GeV = reference<dim_energy, gigaelectronvolt>{};
+
+}  // namespace energy_references
+
+namespace references { 
+
+using namespace energy_references;
+
+}  // namespace references
+
+#endif // UNITS_REFERENCES
+
+}  // namespace units::isq::natural
+
+#ifdef UNITS_ALIASES
+
+namespace units::aliases::isq::natural::inline energy {
+
+template<Representation Rep = double> using GeV = units::isq::natural::energy<units::isq::natural::gigaelectronvolt, Rep>;
+
+}  // namespace units::aliases::isq::natural::inline energy
+
+#endif // UNITS_ALIASES

src/systems/isq-natural/include/units/isq/natural/force.h

@@ -0,0 +1,69 @@
+// 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/isq/natural/acceleration.h>
+#include <units/isq/natural/mass.h>
+
+// IWYU pragma: begin_exports
+#include <units/isq/dimensions/force.h>
+#include <units/isq/natural/units.h>
+#include <units/quantity.h>
+#include <units/reference.h>
+#include <units/symbol_text.h>
+// IWYU pragma: end_exports
+
+namespace units::isq::natural {
+
+struct dim_force : isq::dim_force<dim_force, square_gigaelectronvolt, dim_mass, dim_acceleration> {};
+
+template<UnitOf<dim_force> U, Representation Rep = double>
+using force = quantity<dim_force, U, Rep>;
+
+#ifdef UNITS_REFERENCES
+
+namespace force_references {
+
+inline constexpr auto GeV2 = reference<dim_force, square_gigaelectronvolt>{};
+
+}  // namespace force_references
+
+namespace references { 
+
+using namespace force_references;
+
+}  // namespace references
+
+#endif // UNITS_REFERENCES
+
+}  // namespace units::isq::natural
+
+#ifdef UNITS_ALIASES
+
+namespace units::aliases::isq::natural::inline force {
+
+template<Representation Rep = double> using GeV2 = units::isq::natural::force<units::isq::natural::square_gigaelectronvolt, Rep>;
+
+}  // namespace units::aliases::isq::natural::inline force
+
+#endif // UNITS_ALIASES

src/systems/isq-natural/include/units/isq/natural/length.h

@@ -0,0 +1,66 @@
+// 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
+
+// IWYU pragma: begin_exports
+#include <units/isq/dimensions/length.h>
+#include <units/isq/natural/units.h>
+#include <units/quantity.h>
+#include <units/reference.h>
+#include <units/symbol_text.h>
+// IWYU pragma: end_exports
+
+namespace units::isq::natural {
+
+struct dim_length : isq::dim_length<inverted_gigaelectronvolt> {};
+
+template<UnitOf<dim_length> U, Representation Rep = double>
+using length = quantity<dim_length, U, Rep>;
+
+#ifdef UNITS_REFERENCES
+
+namespace length_references {
+
+inline constexpr auto inv_GeV = reference<dim_length, inverted_gigaelectronvolt>{};
+
+}  // namespace length_references
+
+namespace references { 
+
+using namespace length_references;
+
+}  // namespace references
+
+#endif // UNITS_REFERENCES
+
+}  // namespace units::isq::natural
+
+#ifdef UNITS_ALIASES
+
+namespace units::aliases::isq::natural::inline length {
+
+template<Representation Rep = double> using inv_GeV = units::isq::natural::length<units::isq::natural::inverted_gigaelectronvolt, Rep>;
+
+}  // namespace units::aliases::isq::natural::inline length
+
+#endif // UNITS_ALIASES

src/systems/isq-natural/include/units/isq/natural/mass.h

@@ -0,0 +1,66 @@
+// 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
+
+// IWYU pragma: begin_exports
+#include <units/isq/dimensions/mass.h>
+#include <units/isq/natural/units.h>
+#include <units/quantity.h>
+#include <units/reference.h>
+#include <units/symbol_text.h>
+// IWYU pragma: end_exports
+
+namespace units::isq::natural {
+
+struct dim_mass : isq::dim_mass<gigaelectronvolt> {};
+
+template<UnitOf<dim_mass> U, Representation Rep = double>
+using mass = quantity<dim_mass, U, Rep>;
+
+#ifdef UNITS_REFERENCES
+
+namespace mass_references {
+
+inline constexpr auto GeV = reference<dim_mass, gigaelectronvolt>{};
+
+}  // namespace mass_references
+
+namespace references { 
+
+using namespace mass_references;
+
+}  // namespace references
+
+#endif // UNITS_REFERENCES
+
+}  // namespace units::isq::natural
+
+#ifdef UNITS_ALIASES
+
+namespace units::aliases::isq::natural::inline mass {
+
+template<Representation Rep = double> using GeV = units::isq::natural::mass<units::isq::natural::gigaelectronvolt, Rep>;
+
+}  // namespace units::aliases::isq::natural::inline mass
+
+#endif // UNITS_ALIASES

src/systems/isq-natural/include/units/isq/natural/momentum.h

@@ -0,0 +1,69 @@
+// 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/isq/natural/mass.h>
+#include <units/isq/natural/speed.h>
+
+// IWYU pragma: begin_exports
+#include <units/isq/dimensions/momentum.h>
+#include <units/isq/natural/units.h>
+#include <units/quantity.h>
+#include <units/reference.h>
+#include <units/symbol_text.h>
+// IWYU pragma: end_exports
+
+namespace units::isq::natural {
+
+struct dim_momentum : isq::dim_momentum<dim_momentum, gigaelectronvolt, dim_mass, dim_speed> {};
+
+template<UnitOf<dim_momentum> U, Representation Rep = double>
+using momentum = quantity<dim_momentum, U, Rep>;
+
+#ifdef UNITS_REFERENCES
+
+namespace momentum_references {
+
+inline constexpr auto GeV = reference<dim_momentum, gigaelectronvolt>{};
+
+}  // namespace momentum_references
+
+namespace references { 
+
+using namespace momentum_references;
+
+}  // namespace references
+
+#endif // UNITS_REFERENCES
+
+}  // namespace units::isq::natural
+
+#ifdef UNITS_ALIASES
+
+namespace units::aliases::isq::natural::inline momentum {
+
+template<Representation Rep = double> using GeV = units::isq::natural::momentum<units::isq::natural::gigaelectronvolt, Rep>;
+
+}  // namespace units::aliases::isq::natural::inline momentum
+
+#endif // UNITS_ALIASES

src/systems/isq-natural/include/units/isq/natural/natural.h

@@ -23,7 +23,14 @@
 #pragma once
 
 // IWYU pragma: begin_exports
-#include "dimensions.h"
-#include "units.h"
-#include "constants.h"
+#include <units/isq/natural/acceleration.h>
+#include <units/isq/natural/constants.h>
+#include <units/isq/natural/energy.h>
+#include <units/isq/natural/force.h>
+#include <units/isq/natural/length.h>
+#include <units/isq/natural/mass.h>
+#include <units/isq/natural/momentum.h>
+#include <units/isq/natural/natural.h>
+#include <units/isq/natural/speed.h>
+#include <units/isq/natural/time.h>
 // IWYU pragma: end_exports

src/systems/isq-natural/include/units/isq/natural/speed.h

@@ -0,0 +1,44 @@
+// 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/isq/natural/length.h>
+#include <units/isq/natural/time.h>
+
+// IWYU pragma: begin_exports
+#include <units/generic/dimensionless.h>
+#include <units/isq/dimensions/speed.h>
+#include <units/isq/natural/units.h>
+#include <units/quantity.h>
+#include <units/reference.h>
+#include <units/symbol_text.h>
+// IWYU pragma: end_exports
+
+namespace units::isq::natural {
+
+struct dim_speed : isq::dim_speed<dim_speed, one, dim_length, dim_time> {};
+
+template<UnitOf<dim_speed> U, Representation Rep = double>
+using speed = quantity<dim_speed, U, Rep>;
+
+}  // namespace units::isq::natural

src/systems/isq-natural/include/units/isq/natural/time.h

@@ -0,0 +1,66 @@
+// 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
+
+// IWYU pragma: begin_exports
+#include <units/isq/dimensions/time.h>
+#include <units/isq/natural/units.h>
+#include <units/quantity.h>
+#include <units/reference.h>
+#include <units/symbol_text.h>
+// IWYU pragma: end_exports
+
+namespace units::isq::natural {
+
+struct dim_time : isq::dim_time<inverted_gigaelectronvolt> {};
+
+template<UnitOf<dim_time> U, Representation Rep = double>
+using time = quantity<dim_time, U, Rep>;
+
+#ifdef UNITS_REFERENCES
+
+namespace time_references {
+
+inline constexpr auto inv_GeV = reference<dim_time, inverted_gigaelectronvolt>{};
+
+}  // namespace time_references
+
+namespace references { 
+
+using namespace time_references;
+
+}  // namespace references
+
+#endif // UNITS_REFERENCES
+
+}  // namespace units::isq::natural
+
+#ifdef UNITS_ALIASES
+
+namespace units::aliases::isq::natural::inline time {
+
+template<Representation Rep = double> using inv_GeV = units::isq::natural::time<units::isq::natural::inverted_gigaelectronvolt, Rep>;
+
+}  // namespace units::aliases::isq::natural::inline time
+
+#endif // UNITS_ALIASES