Is it possible to make all functions inline at the compiler level?

No, it is not possible to forcibly make all functions inline at the compiler level. The C++/Kotlin/Java compiler treats the inline keyword as a recommendation, not a mandatory requirement. It may ignore inline for functions that:

• Are too large.
• Have recursive calls.
• Are called through a pointer/reference to a function.
• Throw exceptions.
• Are virtual.

The compiler itself determines whether it is beneficial to inline a function based on optimizations and code size. Forcing inlining of everything can lead to an increase in the executable size and a decrease in performance due to worsened locality of reference for instructions.