How to cleanly end the program with an exit code?

Question

Is there a way of returning an exit code in Rust 1.0?

I've tried env::set_exit_status(exit_code); but this generates a compiler error.

There is also this question: Exit Rust program early which is similar but asks about the case when the process has to be exited early.

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EDIT: I'm looking for a solution that will also allow the process to tidy up the stack, call destructors, etc.

Answer 1

Building over the comments of @FrancisGagné 's answer, if you are searching for an equivalent of C's return exit_code, you can artificially build it this way:

fn main() {
    let exit_code = real_main();
    std::process::exit(exit_code);
}

fn real_main() -> i32 {
    // the real program here
}

This way, all the objects of your program will be in the scope of the real_main() function, and you can safely use return exit_code; in main while still having all destructors properly run.

Answer 2

std::process::exit exits the program with the specified exit code.