Rust bool

let count = 1;

// if count { ... } // COMPILER ERROR: expected `bool`, found integer

if count != 0 {
    // Valid control flow
}

assert_eq!(std::mem::size_of::<bool>(), 1);
assert_eq!(std::mem::align_of::<bool>(), 1);

let implicit_bool = true;
let explicit_bool: bool = false;

let true_as_int = true as u8;    // 1
let false_as_int = false as i32; // 0

// let true_as_float = true as f32; // COMPILER ERROR E0605

// let invalid_bool = 1 as bool; // COMPILER ERROR
let valid_bool = 1 != 0;         // Evaluates to true

let t = true;
let f = false;

let short_and = f && t; // false (short-circuits, `t` is not evaluated)
let short_or  = t || f; // true (short-circuits, `f` is not evaluated)
let eager_xor = t ^ f;  // true (eager evaluation of both operands)
let negation  = !t;     // false