pub trait Neg {
type Output;
// Required method
fn neg(self) -> Self::Output;
}Expand description
The unary negation operator -.
Examples
An implementation of Neg for Sign, which allows the use of - to
negate its value.
use std::ops::Neg;
#[derive(Debug, PartialEq)]
enum Sign {
Negative,
Zero,
Positive,
}
impl Neg for Sign {
type Output = Self;
fn neg(self) -> Self::Output {
match self {
Sign::Negative => Sign::Positive,
Sign::Zero => Sign::Zero,
Sign::Positive => Sign::Negative,
}
}
}
// A negative positive is a negative.
assert_eq!(-Sign::Positive, Sign::Negative);
// A double negative is a positive.
assert_eq!(-Sign::Negative, Sign::Positive);
// Zero is its own negation.
assert_eq!(-Sign::Zero, Sign::Zero);Required Associated Types§
Required Methods§
Implementors§
1.71.0 · source§impl Neg for &NonZeroI16
impl Neg for &NonZeroI16
type Output = <NonZeroI16 as Neg>::Output
1.71.0 · source§impl Neg for &NonZeroI32
impl Neg for &NonZeroI32
type Output = <NonZeroI32 as Neg>::Output
1.71.0 · source§impl Neg for &NonZeroI64
impl Neg for &NonZeroI64
type Output = <NonZeroI64 as Neg>::Output
1.71.0 · source§impl Neg for &NonZeroI128
impl Neg for &NonZeroI128
type Output = <NonZeroI128 as Neg>::Output
1.71.0 · source§impl Neg for &NonZeroIsize
impl Neg for &NonZeroIsize
type Output = <NonZeroIsize as Neg>::Output
source§impl Neg for vector_float
Available on PowerPC or PowerPC-64 only.
impl Neg for vector_float
Available on PowerPC or PowerPC-64 only.
type Output = vector_float
source§impl Neg for vector_signed_char
Available on PowerPC or PowerPC-64 only.
impl Neg for vector_signed_char
Available on PowerPC or PowerPC-64 only.
type Output = vector_signed_char
source§impl Neg for vector_signed_int
Available on PowerPC or PowerPC-64 only.
impl Neg for vector_signed_int
Available on PowerPC or PowerPC-64 only.
type Output = vector_signed_int
source§impl Neg for vector_signed_short
Available on PowerPC or PowerPC-64 only.
impl Neg for vector_signed_short
Available on PowerPC or PowerPC-64 only.