refactor: Fine-grained references support added

example/references/box_example.cpp

@@ -39,12 +39,12 @@
 namespace {
 
 using namespace units::isq;
-using namespace si::references;
+using namespace si::mass_references;
+using namespace si::volume_references;
 
 inline constexpr Acceleration auto g = si::si2019::standard_gravity<>;
 inline constexpr Density auto air_density = 1.225 * (kg / m3);
 
-
 class Box {
   si::area<si::square_metre> base_;
   si::length<si::metre> height_;
@@ -82,6 +82,8 @@ public:
 int main()
 {
   using namespace units;
+  using namespace si::length_references;
+  using namespace si::time_references;
 
   const si::length<si::metre> height = 200.0 * mm;
   auto box = Box(1000.0 * mm, 500.0 * mm, height);

example/references/experimental_angle.cpp

@@ -24,21 +24,21 @@
 
 UNITS_DIAGNOSTIC_PUSH
 UNITS_DIAGNOSTIC_IGNORE_SHADOW
+#include <units/isq/si/force.h>
+UNITS_DIAGNOSTIC_POP
+
 #include <units/generic/angle.h>
 #include <units/isq/si/energy.h>
-#include <units/isq/si/force.h>
 #include <units/isq/si/length.h>
 #include <units/isq/si/torque.h> // IWYU pragma: keep
 #include <units/quantity_io.h>
-UNITS_DIAGNOSTIC_POP
-
 #include <iostream>
 
 int main()
 {
-  using namespace units::references;
   using namespace units::isq;
   using namespace units::isq::si::references;
+  using namespace units::references;
 
   Torque auto torque = 20.0 * (N * m / rad);
   Energy auto energy = 20.0 * J;

example/references/linear_algebra.cpp

@@ -60,7 +60,8 @@ std::ostream& operator<<(std::ostream& os, const matrix<ET, OT>& v)
 namespace {
 
 using namespace units::isq;
-using namespace units::isq::si::references;
+using namespace units::isq::si::length_references;
+using namespace units::isq::si::force_references;
 
 template<typename Rep = double>
 using vector = std::math::fs_vector<Rep, 3>;
@@ -68,7 +69,6 @@ using vector = std::math::fs_vector<Rep, 3>;
 template<typename Rep = double>
 using matrix = std::math::fs_matrix<Rep, 3, 3>;
 
-
 void vector_of_quantity_add()
 {
   std::cout << "\nvector_of_quantity_add:\n";

example/references/total_energy.cpp

@@ -21,11 +21,11 @@
 // SOFTWARE.
 
 #include <units/isq/natural/natural.h>
+#include <units/isq/si/constants.h>
 #include <units/isq/si/energy.h>
 #include <units/isq/si/mass.h>
 #include <units/isq/si/momentum.h>
 #include <units/isq/si/speed.h> // IWYU pragma: keep
-#include <units/isq/si/constants.h>
 #include <units/math.h>
 #include <units/quantity_io.h>
 #include <exception>
@@ -43,7 +43,7 @@ Energy auto total_energy(Momentum auto p, Mass auto m, Speed auto c)
 void si_example()
 {
   using namespace units::isq::si;
-  using namespace units::isq::si::references;
+  using namespace units::isq::si::energy_references;
 
   constexpr Speed auto c = si2019::speed_of_light<>;