Unary Operators

^Syntax
UnaryExpression :
     not Expression
   | - Expression
   | ~ Expression

The unary operators are used to negate expressions. The unary - (minus) operator yields the negation of its numeric argument. The unary ~ (invert) operator yields the bitwise inversion of its integer argument. The unary not operator yields the inversion of its boolean argument.

Example:

fn f() {
  let x: bool = not true  // false
  let y: i256 = -1
  let z: i256 = i256(~1)  // -2
}