How do I convert a boolean to an integer in Rust?

Question

How do I convert a boolean to an integer in Rust? As in, true becomes 1, and false becomes 0.

Answer 1

A boolean value in Rust is guaranteed to be 1 or 0:

The bool represents a value, which could only be either true or false. If you cast a bool into an integer, true will be 1 and false will be 0.

A boolean value, which is neither 0 nor 1 is undefined behavior:

A value other than false (0) or true (1) in a bool.

Therefore, you can just cast it to a primitive:

assert_eq!(0, false as i32);
assert_eq!(1, true as i32);