refactor: headers with system definitions moved to _systems_ subdirectory

example/avg_speed.cpp

@@ -20,11 +20,11 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
-#include <units/cgs/cgs.h>
-#include <units/isq/space_and_time.h>
 #include <units/quantity_io.h>
-#include <units/si/unit_symbols.h>
-#include <units/international/international.h>
+#include <units/systems/cgs/cgs.h>
+#include <units/systems/international/international.h>
+#include <units/systems/isq/space_and_time.h>
+#include <units/systems/si/unit_symbols.h>
 #include <exception>
 #include <iostream>
 

example/box_example.cpp

@@ -21,11 +21,11 @@
 // SOFTWARE.
 
 #include <units/format.h>
-#include <units/isq/mechanics.h>
-#include <units/isq/space_and_time.h>
-#include <units/si/constants.h>
-#include <units/si/unit_symbols.h>
-#include <units/si/units.h>
+#include <units/systems/isq/mechanics.h>
+#include <units/systems/isq/space_and_time.h>
+#include <units/systems/si/constants.h>
+#include <units/systems/si/unit_symbols.h>
+#include <units/systems/si/units.h>
 #include <cassert>
 #include <iostream>
 #include <utility>

example/capacitor_time_curve.cpp

@@ -20,10 +20,10 @@
     physical_quantities
 */
 
-#include <units/isq/electromagnetism.h>
 #include <units/math.h>  // IWYU pragma: keep
 #include <units/quantity_io.h>
-#include <units/si/si.h>
+#include <units/systems/isq/electromagnetism.h>
+#include <units/systems/si/si.h>
 #include <iostream>
 
 int main()

example/clcpp_response.cpp

@@ -16,14 +16,14 @@
 */
 
 #include <units/format.h>
-#include <units/iau/iau.h>
-#include <units/imperial/imperial.h>
-#include <units/international/international.h>
-#include <units/isq/space_and_time.h>
 #include <units/quantity_io.h>
-#include <units/si/si.h>
-#include <units/typographic/typographic.h>
-#include <units/usc/usc.h>
+#include <units/systems/iau/iau.h>
+#include <units/systems/imperial/imperial.h>
+#include <units/systems/international/international.h>
+#include <units/systems/isq/space_and_time.h>
+#include <units/systems/si/si.h>
+#include <units/systems/typographic/typographic.h>
+#include <units/systems/usc/usc.h>
 #include <iostream>
 
 namespace {

example/conversion_factor.cpp

@@ -16,8 +16,8 @@
 */
 
 #include <units/format.h>
-#include <units/isq/space_and_time.h>
-#include <units/si/units.h>
+#include <units/systems/isq/space_and_time.h>
+#include <units/systems/si/units.h>
 #include <iostream>
 #include <type_traits>
 

example/foot_pound_second.cpp

@@ -21,10 +21,10 @@
 // SOFTWARE.
 
 #include <units/format.h>
-#include <units/imperial/imperial.h>
-#include <units/international/international.h>
-#include <units/isq/space_and_time.h>
-#include <units/si/unit_symbols.h>
+#include <units/systems/imperial/imperial.h>
+#include <units/systems/international/international.h>
+#include <units/systems/isq/space_and_time.h>
+#include <units/systems/si/unit_symbols.h>
 #include <iostream>
 #include <string_view>
 

example/glide_computer/include/geographic.h

@@ -24,9 +24,9 @@
 
 #include "ranged_representation.h"
 #include <units/bits/fmt_hacks.h>
-#include <units/isq/space_and_time.h>
 #include <units/quantity.h>
-#include <units/si/units.h>
+#include <units/systems/isq/space_and_time.h>
+#include <units/systems/si/units.h>
 #include <compare>
 #include <limits>
 #include <numbers>

example/glide_computer/include/glide_computer.h

@@ -25,9 +25,9 @@
 #include "geographic.h"
 #include <units/chrono.h>
 #include <units/format.h>
-#include <units/isq/space_and_time.h>
 #include <units/math.h>  // IWYU pragma: keep
 #include <units/quantity_point.h>
+#include <units/systems/isq/space_and_time.h>
 #include <algorithm>
 #include <array>
 #include <initializer_list>

example/glide_computer_example.cpp

@@ -23,9 +23,9 @@
 #include "glide_computer.h"
 #include <units/bits/fmt_hacks.h>
 #include <units/chrono.h>
-#include <units/international/international.h>
+#include <units/systems/international/international.h>
 #include <units/math.h>
-#include <units/si/unit_symbols.h>
+#include <units/systems/si/unit_symbols.h>
 #include <array>
 #include <exception>
 #include <iostream>

example/hello_units.cpp

@@ -21,10 +21,10 @@
 // SOFTWARE.
 
 #include <units/format.h>
-#include <units/international/international.h>
-#include <units/isq/space_and_time.h>
+#include <units/systems/international/international.h>
+#include <units/systems/isq/space_and_time.h>
 #include <units/quantity_io.h>
-#include <units/si/unit_symbols.h>
+#include <units/systems/si/unit_symbols.h>
 #include <iostream>
 
 using namespace units;

example/kalman_filter/kalman.h

@@ -24,10 +24,10 @@
 
 #include <units/bits/fmt_hacks.h>
 #include <units/format.h>
-#include <units/isq/space_and_time.h>
 #include <units/math.h>
 #include <units/quantity.h>
 #include <units/quantity_point.h>
+#include <units/systems/isq/space_and_time.h>
 #include <tuple>
 
 namespace kalman {

example/kalman_filter/kalman_filter-example_1.cpp

@@ -22,8 +22,8 @@
 
 #include "kalman.h"
 #include <units/format.h>
-#include <units/isq/space_and_time.h>
-#include <units/si/unit_symbols.h>
+#include <units/systems/isq/space_and_time.h>
+#include <units/systems/si/unit_symbols.h>
 #include <array>
 #include <iostream>
 

example/kalman_filter/kalman_filter-example_2.cpp

@@ -22,8 +22,8 @@
 
 #include "kalman.h"
 #include <units/format.h>
-#include <units/isq/space_and_time.h>
-#include <units/si/unit_symbols.h>
+#include <units/systems/isq/space_and_time.h>
+#include <units/systems/si/unit_symbols.h>
 #include <array>
 #include <iostream>
 

example/kalman_filter/kalman_filter-example_3.cpp

@@ -22,8 +22,8 @@
 
 #include "kalman.h"
 #include <units/format.h>
-#include <units/isq/space_and_time.h>
-#include <units/si/unit_symbols.h>
+#include <units/systems/isq/space_and_time.h>
+#include <units/systems/si/unit_symbols.h>
 #include <array>
 #include <iostream>
 

example/kalman_filter/kalman_filter-example_4.cpp

@@ -22,8 +22,8 @@
 
 #include "kalman.h"
 #include <units/format.h>
-#include <units/isq/space_and_time.h>
-#include <units/si/unit_symbols.h>
+#include <units/systems/isq/space_and_time.h>
+#include <units/systems/si/unit_symbols.h>
 #include <array>
 #include <iostream>
 

example/kalman_filter/kalman_filter-example_5.cpp

@@ -22,9 +22,9 @@
 
 #include "kalman.h"
 #include <units/format.h>
-#include <units/isq/space_and_time.h>
 #include <units/math.h>
-#include <units/si/unit_symbols.h>
+#include <units/systems/isq/space_and_time.h>
+#include <units/systems/si/unit_symbols.h>
 #include <array>
 #include <iostream>
 

example/kalman_filter/kalman_filter-example_6.cpp

@@ -22,10 +22,10 @@
 
 #include "kalman.h"
 #include <units/format.h>
-#include <units/isq/thermodynamics.h>
 #include <units/math.h>
 #include <units/quantity_point.h>
-#include <units/si/unit_symbols.h>
+#include <units/systems/isq/thermodynamics.h>
+#include <units/systems/si/unit_symbols.h>
 #include <array>
 #include <iostream>
 

example/kalman_filter/kalman_filter-example_7.cpp

@@ -22,10 +22,10 @@
 
 #include "kalman.h"
 #include <units/format.h>
-#include <units/isq/thermodynamics.h>
 #include <units/math.h>
 #include <units/quantity_point.h>
-#include <units/si/unit_symbols.h>
+#include <units/systems/isq/thermodynamics.h>
+#include <units/systems/si/unit_symbols.h>
 #include <array>
 #include <iostream>
 

example/kalman_filter/kalman_filter-example_8.cpp

@@ -22,10 +22,10 @@
 
 #include "kalman.h"
 #include <units/format.h>
-#include <units/isq/thermodynamics.h>
 #include <units/math.h>
 #include <units/quantity_point.h>
-#include <units/si/unit_symbols.h>
+#include <units/systems/isq/thermodynamics.h>
+#include <units/systems/si/unit_symbols.h>
 #include <array>
 #include <iostream>
 
@@ -63,7 +63,8 @@ int main()
                                    quantity_point{54.523 * deg_C}, quantity_point{54.99 * deg_C}};
   const auto measurement_uncertainty = pow<2>(0.1 * deg_C);
 
-  auto update = [=]<QuantityPoint QP>(const estimation<QP>& previous, const QP& meassurement, quantity_of<dimensionless> auto gain) {
+  auto update = [=]<QuantityPoint QP>(const estimation<QP>& previous, const QP& meassurement,
+                                      quantity_of<dimensionless> auto gain) {
     return estimation{state_update(previous.state, meassurement, gain), covariance_update(previous.uncertainty, gain)};
   };
 

example/measurement.cpp

@@ -20,10 +20,10 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
-#include <units/isq/space_and_time.h>
+#include <units/systems/isq/space_and_time.h>
 #include <units/quantity_io.h>
-#include <units/si/unit_symbols.h>
-#include <units/si/units.h>
+#include <units/systems/si/unit_symbols.h>
+#include <units/systems/si/units.h>
 #include <cmath>
 #include <exception>
 #include <iostream>

example/si_constants.cpp

@@ -21,8 +21,8 @@
 // SOFTWARE.
 
 #include <units/format.h>
-#include <units/si/constants.h>
-#include <units/si/unit_symbols.h>
+#include <units/systems/si/constants.h>
+#include <units/systems/si/unit_symbols.h>
 #include <iostream>
 
 template<class T>

example/strong_angular_quantities.cpp

@@ -20,10 +20,10 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
-#include <units/isq_angle/isq_angle.h>
 #include <units/math.h>
 #include <units/quantity_io.h>
-#include <units/si/unit_symbols.h>
+#include <units/systems/isq_angle/isq_angle.h>
+#include <units/systems/si/unit_symbols.h>
 #include <iostream>
 
 template<class T>

example/total_energy.cpp

@@ -20,12 +20,12 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 
-#include <units/isq/mechanics.h>
 #include <units/math.h>
-#include <units/natural/natural.h>
 #include <units/quantity_io.h>
-#include <units/si/constants.h>
-#include <units/si/unit_symbols.h>
+#include <units/systems/isq/mechanics.h>
+#include <units/systems/natural/natural.h>
+#include <units/systems/si/constants.h>
+#include <units/systems/si/unit_symbols.h>
 #include <exception>
 #include <iostream>