Trait Sign 

pub trait Sign {
    // Required methods
    fn kernel_copysign(self, sign: &Self) -> Self;
    fn kernel_signum(self) -> Self;
    fn kernel_is_sign_negative(&self) -> bool;
    fn kernel_is_sign_positive(&self) -> bool;
}

Provides methods for sign manipulation and checking.

Required Methods

fn kernel_copysign(self, sign: &Self) -> Self

Returns a number with the magnitude of self and the sign of sign.

fn kernel_signum(self) -> Self

Computes the signum.

The returned value is:

• 1.0 if the value is positive, +0.0 or +∞
• −1.0 if the value is negative, −0.0 or −∞
• NaN if the value is NaN

fn kernel_is_sign_negative(&self) -> bool

Returns true if the value is negative, −0 or NaN with a negative sign.

fn kernel_is_sign_positive(&self) -> bool

Returns true if the value is positive, +0 or NaN with a positive sign.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl Sign for f64

fn kernel_copysign(self, sign: &Self) -> Self

Returns a number with the magnitude of self and the sign of sign.

fn kernel_is_sign_negative(&self) -> bool

Returns true if the value is negative, −0 or NaN with a negative sign.

fn kernel_is_sign_positive(&self) -> bool

Returns true if the value is positive, +0 or NaN with a positive sign.

fn kernel_signum(self) -> Self

Computes the signum.

The returned value is:

• 1.0 if the value is positive, +0.0 or +∞
• −1.0 if the value is negative, −0.0 or −∞
• NaN if the value is NaN

impl Sign for Float

fn kernel_copysign(self, sign: &Self) -> Self

Returns a number with the magnitude of self and the sign of sign.

fn kernel_is_sign_negative(&self) -> bool

Returns true if the value is negative, −0 or NaN with a negative sign.

fn kernel_is_sign_positive(&self) -> bool

Returns true if the value is positive, +0 or NaN with a positive sign.

fn kernel_signum(self) -> Self

Returns the signum of the number.

This method relies on rug::Float::signum(). The behavior for special values is as follows:

• If the number is positive and not zero, returns 1.0.
• If the number is negative and not zero, returns -1.0.
• If the number is zero, rug::Float::signum() returns 1.0 (representing positive zero).

Implementors

impl<K: NumKernel> Sign for RealValidated<K>