Usefulness of the “inline” feature

Question

There\'s two things about inlining:

• The inline keyword will be ignored if the compiler determines that the function cannot be inlined.
• Th

Answer 1

Inline is also useful if you want the ability to inline functions from a library. Only by putting the code for the function in the header file (which requires inline), is the compiler able to inline the function. Of course it is still up the the compiler whether to inline the function or not.