inline vs __inline vs __inline__ vs __forceinline?

Question

What are the differences between these four inline (key)words?

inline, __inline, __inline__, __forceinline.

Answer 1

For the Visual Studio compiler it means:

• inline - suggestion to the compiler to inline your code

• __forceinline - overrides the builtin compiler optimization and generates inline code

For more details see: http://msdn.microsoft.com/en-us/library/z8y1yy88%28VS.71%29.aspx