The requirement for a function to be inline in C ++

Question

what is the requirement for a function so that it can be executed inline in C ++? is there a case where a function cannot be inline? or can any function be built-in, and the programmer must decide how to determine the function based on runtime and compile-time considerations?

Answer 1

What is the requirement for it to be able to be executed inline in C ++?

It must be defined in every place in which it is called (usually this is done by putting it in .h).

is there a case where a function cannot be inline?

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Answer 2

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Answer 3

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Answer 4

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Answer 5

built-in functions depend on the length of the code and complexity of the code ... :) The built-in function is just a request to the compiler ...