Trait core::ops::Neg [src]

pub trait Neg<Result> {
    fn neg(&self) -> Result;
}

The Neg trait is used to specify the functionality of unary -.

Example

A trivial implementation of Neg. When -Foo happens, it ends up calling neg, and therefore, main prints Negating!.

struct Foo; impl Neg<Foo> for Foo { fn neg(&self) -> Foo { println!("Negating!"); *self } } fn main() { -Foo; }

struct Foo;

impl Neg<Foo> for Foo {
    fn neg(&self) -> Foo {
        println!("Negating!");
        *self
    }
}

fn main() {
    -Foo;
}

The method for the unary - operator