Trait std::num::Signed
pub trait Signed: Num + Neg<Self> {
fn abs(&self) -> Self;
fn abs_sub(&self, other: &Self) -> Self;
fn signum(&self) -> Self;
fn is_positive(&self) -> bool;
fn is_negative(&self) -> bool;
}Useful functions for signed numbers (i.e. numbers that can be negative).
Required Methods
fn abs(&self) -> Self
Computes the absolute value.
For float, f32, and f64, NaN will be returned if the number is NaN.
fn abs_sub(&self, other: &Self) -> Self
The positive difference of two numbers.
Returns zero if the number is less than or equal to other, otherwise the difference
between self and other is returned.
fn signum(&self) -> Self
Returns the sign of the number.
For float, f32, f64:
* 1.0 if the number is positive, +0.0 or INFINITY
* -1.0 if the number is negative, -0.0 or NEG_INFINITY
* NaN if the number is NaN
For int:
* 0 if the number is zero
* 1 if the number is positive
* -1 if the number is negative
fn is_positive(&self) -> bool
Returns true if the number is positive and false if the number is zero or negative.
fn is_negative(&self) -> bool
Returns true if the number is negative and false if the number is zero or positive.