"Professional CMake" book suggest the following:
"Targets should build successfully with or without compiler support for precompiled headers. It
should be considered an optimization, not a requirement. In particular, do not explicitly include a
precompile header (e.g. stdafx.h) in the source code, let CMake force-include an automatically
generated precompile header on the compiler command line instead. This is more portable across
the major compilers and is likely to be easier to maintain. It will also avoid warnings being
generated from certain code checking tools like iwyu (include what you use)."
Therefore, removed the "#include <PreCompiled.h>" from sources, also
there is no need for the "#ifdef _PreComp_" anymore
This commit renames methods of ServiceProvider to be easier to
understand. It also replaces the misleading singleton with more correct
here global instance of class.
This is intended to be used for intra-module communication. Modules can
specify service that are then implemented by other modules. This way
we can use features from for example part in Core without relying on the
Part module explicitly.
Base does provide Service definition - which is basically an abstract
class with pure virtual methods. This service then can be implemented
in other modules and accessed in runtime via ServiceProvider class that
stores all implementations.
ServiceProvider does store multiple implementations so in theory it is
possible to use it to provide granular implementations. For example,
part can provide CenterOfMass service that provides center of mass for
part features, mesh can implement another one for meshes and then we can
iterate over all implementations and find one that can provide center of
