When should I write the keyword 'inline' for a function/method?

Question

When should I write the keyword inline for a function/method in C++?

After seeing some answers, some related questions:

• When should I <

Answer 1

1) Nowadays, pretty much never. If it's a good idea to inline a function, the compiler will do it without your help.

2) Always. See #1.

(Edited to reflect that you broke your question into two questions...)