core::traits::Not

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);