refactor: 💥 q_* UDL renamed to _q_*

We had some fun exploring the STD UDLs for potential collisions,
we have learnt our lesson and know how to proceed.
Now is high time to start behaving and obeying C++ rules.

example/alternative_namespaces/box_example.cpp

@@ -56,11 +56,11 @@ using namespace units::physical::si::literals;
 
 int main()
 {
-  auto box = Box{1000.0q_mm, 500.0q_mm, 200.0q_mm};
-  box.set_contents_density(1000.0q_kg_per_m3);
+  auto box = Box{1000.0_q_mm, 500.0_q_mm, 200.0_q_mm};
+  box.set_contents_density(1000.0_q_kg_per_m3);
 
-  auto fill_time = 200.0q_s;      // time since starting fill
-  auto measured_mass = 20.0q_kg;  // measured mass at fill_time
+  auto fill_time = 200.0_q_s;      // time since starting fill
+  auto measured_mass = 20.0_q_kg;  // measured mass at fill_time
 
   std::cout << "mpusz/units box example ( using experimental alternative syntax for defining quantities) ...\n";
   std::cout << "fill height at " << fill_time << " = " << box.fill_level(measured_mass) << " ("

example/alternative_namespaces/capacitor_time_curve.cpp

@@ -36,22 +36,22 @@ int main()
   std::cout.setf(std::ios_base::fixed, std::ios_base::floatfield);
   std::cout.precision(3);
 
-  constexpr auto C = 0.47q_uF;
-  constexpr auto V0 = 5.0q_V;
-  constexpr auto R = 4.7q_kR;
+  constexpr auto C = 0.47_q_uF;
+  constexpr auto V0 = 5.0_q_V;
+  constexpr auto R = 4.7_q_kR;
 
-  for (auto t = 0q_ms; t <= 50q_ms; ++t) {
+  for (auto t = 0_q_ms; t <= 50_q_ms; ++t) {
     const auto Vt = V0 * units::exp(-t / (R * C));
 
     std::cout << "at " << t << " voltage is ";
 
-    if (Vt >= 1q_V)
+    if (Vt >= 1_q_V)
       std::cout << Vt;
-    else if (Vt >= 1q_mV)
+    else if (Vt >= 1_q_mV)
       std::cout << voltage::mV<>{Vt};
-    else if (Vt >= 1q_uV)
+    else if (Vt >= 1_q_uV)
       std::cout << voltage::uV<>{Vt};
-    else if (Vt >= 1q_nV)
+    else if (Vt >= 1_q_nV)
       std::cout << voltage::nV<>{Vt};
     else
       std::cout << voltage::pV<>{Vt};

example/alternative_namespaces/clcpp_response.cpp

@@ -33,12 +33,12 @@ void simple_quantities()
   using distance = length::m<>;
   using q_time = q_time::s<>;
 
-  constexpr distance km = 1.0q_km;
-  constexpr distance miles = 1.0q_mi;
+  constexpr distance km = 1.0_q_km;
+  constexpr distance miles = 1.0_q_mi;
 
-  constexpr q_time sec = 1q_s;
-  constexpr q_time min = 1q_min;
-  constexpr q_time hr = 1q_h;
+  constexpr q_time sec = 1_q_s;
+  constexpr q_time min = 1_q_min;
+  constexpr q_time hr = 1_q_h;
 
   std::cout << "A physical quantities library can choose the simple\n";
   std::cout << "option to provide output using a single type for each base unit:\n\n";
@@ -51,12 +51,12 @@ void simple_quantities()
 
 void quantities_with_typed_units()
 {
-  constexpr length::km<> km = 1.0q_km;
-  constexpr length::mi<> miles = 1.0q_mi;
+  constexpr length::km<> km = 1.0_q_km;
+  constexpr length::mi<> miles = 1.0_q_mi;
 
-  constexpr q_time::s<> sec = 1q_s;
-  constexpr q_time::min<> min = 1q_min;
-  constexpr q_time::h<> hr = 1q_h;
+  constexpr q_time::s<> sec = 1_q_s;
+  constexpr q_time::min<> min = 1_q_min;
+  constexpr q_time::h<> hr = 1_q_h;
 
   std::cout << "A more flexible option is to provide separate types for each unit,\n\n";
   std::cout << km << '\n';
@@ -65,7 +65,7 @@ void quantities_with_typed_units()
   std::cout << min << '\n';
   std::cout << hr << "\n\n";
 
-  constexpr length::m<> meter = 1q_m;
+  constexpr length::m<> meter = 1_q_m;
   std::cout << "then a wide range of pre-defined units can be defined and converted,\n"
                " for consistency and repeatability across applications:\n\n";
 
@@ -97,8 +97,8 @@ void calcs_comparison()
                "when adding two values of the same very big\n"
                "or very small type:\n\n";
 
-  length::fm<float> L1A = 2.q_fm;
-  length::fm<float> L2A = 3.q_fm;
+  length::fm<float> L1A = 2._q_fm;
+  length::fm<float> L2A = 3._q_fm;
   length::fm<float> LrA = L1A + L2A;
   fmt::print("{:%.30Q %q}\n + {:%.30Q %q}\n   = {:%.30Q %q}\n\n",L1A,L2A,LrA);
 

example/alternative_namespaces/conversion_factor.cpp

@@ -47,7 +47,7 @@ int main()
 {
   std::cout << "conversion factor in mpusz/units...\n\n";
 
-  constexpr length::m<> lengthA = 2.0q_m;
+  constexpr length::m<> lengthA = 2.0_q_m;
   constexpr length::mm<> lengthB = lengthA;
 
   std::cout << "lengthA( " << lengthA << " ) and lengthB( " << lengthB << " )\n"

example/alternative_namespaces/timer.cpp

@@ -13,7 +13,7 @@ int main()
 {
    std::cout << "Simple timer using mpusz/units ...\n";
 
-   auto const period = 0.5q_s;
+   auto const period = 0.5_q_s;
    auto const duration = 10 * period;
 
    timer t;