C++ `final` keyword experiment (TODO blog link)

CMakeLists.txt

option(WITH_FINAL "Use the `final` specifier on derived classes (faster?)" OFF)

# ...

if (WITH_FINAL)
  message(STATUS "Using `final` spicifer (faster?)")
  target_compile_definitions(PSRayTracing_StaticLibrary PUBLIC USE_FINAL)
else()
  message(STATUS "Turned off use of `final` (slower?)")
endif()

Common.hpp

#ifdef USE_FINAL
    #define FINAL final
#else
    #define FINAL
#endif

FINAL_being_used.cpp

$ rg FINAL

RandomGenerator.hpp
185:class RandomGenerator FINAL : public _GeneralizedRandomGenerator<std::uniform_real_distribution, rreal, RNG_ENGINE> {

Materials/Lambertian.hpp
8:class Lambertian FINAL : public IMaterial {

...

Materials/SurfaceNormal.hpp
7:class SurfaceNormal FINAL : public IMaterial {

...

PDFs/HittablePDF.hpp
7:class HittablePDF FINAL : public IPDF {

...

Objects/Sphere.hpp
19:class Sphere FINAL : public IHittable {