fix: torque literal fixed + experimental_angle example refactored

docs/examples.rst

@@ -17,5 +17,6 @@ Examples
     examples/capacitor_time_curve
     examples/clcpp_response
     examples/conversion_factor
+    examples/experimental_angle
     examples/kalman_filter-alpha_beta_filter_example2
     examples/total_energy

docs/examples/experimental_angle.rst

@@ -0,0 +1,7 @@
+experimental_angle
+==================
+
+.. literalinclude:: ../../example/references/experimental_angle.cpp
+  :caption: experimental_angle.cpp
+  :start-at: #include
+  :linenos:

example/literals/experimental_angle.cpp

@@ -22,21 +22,17 @@
 
 #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>
 #include <units/quantity_io.h>
-
 #include <iostream>
 
 int main()
 {
-  using namespace units::literals;
   using namespace units::isq;
   using namespace units::isq::si::literals;
 
-  Torque auto torque = 20.0_q_Nm_per_rad;
-  Energy auto energy = 20.0_q_J;
+  const auto torque = 20.0_q_N_m_per_rad;
+  const auto energy = 20.0_q_J;
 
   units::Angle auto angle = energy / torque;
 

src/systems/si/include/units/isq/si/torque.h

@@ -47,8 +47,8 @@ using torque = quantity<dim_torque, U, Rep>;
 inline namespace literals {
 
 // Nm
-constexpr auto operator"" _q_Nm_per_rad(unsigned long long l) { gsl_ExpectsAudit(std::in_range<std::int64_t>(l)); return torque<newton_metre_per_radian, std::int64_t>(static_cast<std::int64_t>(l)); }
-constexpr auto operator"" _q_Nm_per_rad(long double l) { return torque<newton_metre_per_radian, long double>(l); }
+constexpr auto operator"" _q_N_m_per_rad(unsigned long long l) { gsl_ExpectsAudit(std::in_range<std::int64_t>(l)); return torque<newton_metre_per_radian, std::int64_t>(static_cast<std::int64_t>(l)); }
+constexpr auto operator"" _q_N_m_per_rad(long double l) { return torque<newton_metre_per_radian, long double>(l); }
 
 }  // namespace literals
 

test/unit_test/runtime/fmt_units_test.cpp

@@ -312,7 +312,7 @@ TEST_CASE("fmt::format on synthesized unit symbols", "[text][fmt]")
 
   SECTION("torque")
   {
-    CHECK(fmt::format("{}", 1_q_Nm_per_rad) == "1 N ⋅ m/rad");
+    CHECK(fmt::format("{}", 1_q_N_m_per_rad) == "1 N ⋅ m/rad");
   }
 
   SECTION("storage_capacity")