Other improvements

Inline variables

can be used in header files which are used by multiple CPP files. All will refer to the same instance of the variable.

class MyCLass
{
    static inline int s_counter = 0;
};
inline MyClass myDefaultInstance;

Small improvements

• volatile
  to be used for values which can be changed outside of the control of the program (e.g. by a signal handler). The compiler has to perform explicit load/store operations when reading/writing the value without the possibility of optimization. This has nothing to do with MultiThreading!
  volatile int myVolatileGlobalVariable;
void DoSomething(volatile SomeStruct* in_pStruct);
• char8_t
  can represent any UTF-8 code unit, has size 1 byte (like unsigned char) but is a different type
  std::u8string myUtf8String = u8"This is the String";
• enum in local scopes
  enum class Color {RED, GREEN, BLUE};
...
switch (color)
{
using enum Color;
case RED: ... // here it is not necessary to specify the name "Color"
case GREEN:
...