Skip to main content
The unary logical negation operator !.

​
Signature

pub trait Not

​
Examples

An implementation of Not for Answer, which enables the use of ! to invert its value. 
#[derive(Drop, PartialEq)]
enum Answer {
    Yes,
    No,
}

impl AnswerNot of Not {
    fn not(a: Answer) -> Answer {
        match a {
            Answer::Yes => Answer::No,
            Answer::No => Answer::Yes,
        }
    }
}

assert!(!Answer::Yes == Answer::No);
assert!(!Answer::No == Answer::Yes);

​
Trait functions

​
not

Performs the unary ! operation.

​
Signature

fn not(a: T) -> T

​
Examples

assert!(!true == false);
assert!(!false == true);