Trait std::ops::Neg
[−]
[src]
pub trait Neg { type Output; fn neg(self) -> Self::Output; }
The Neg
`Negtrait is used to specify the functionality of unary
` trait is used to specify the functionality of unary -
`-`.
Examples
A trivial implementation of Neg
`Neg. When
`. When -Foo
`-Foohappens, it ends up calling
` happens, it ends up calling
neg
`neg, and therefore,
`, and therefore, main
`mainprints
` prints Negating!
`Negating!`.
use std::ops::Neg; #[derive(Copy, Clone)] struct Foo; impl Neg for Foo { type Output = Foo; fn neg(self) -> Foo { println!("Negating!"); self } } fn main() { -Foo; }
Associated Types
type Output
The resulting type after applying the -
`-` operator