Trait num::traits::sign::Signed

pub trait Signed: Num + Neg<Output = Self> {
    pub fn abs(&self) -> Self;
    pub fn abs_sub(&self, other: &Self) -> Self;
    pub fn signum(&self) -> Self;
    pub fn is_positive(&self) -> bool;
    pub fn is_negative(&self) -> bool;
}

Useful functions for signed numbers (i.e. numbers that can be negative).

Required methods

pub fn abs(&self) -> Self

Computes the absolute value.

For f32 and f64, NaN will be returned if the number is NaN.

For signed integers, ::MIN will be returned if the number is ::MIN.

pub 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.

pub fn signum(&self) -> Self

Returns the sign of the number.

For f32 and 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 signed integers:

• 0 if the number is zero
• 1 if the number is positive
• -1 if the number is negative

pub fn is_positive(&self) -> bool

Returns true if the number is positive and false if the number is zero or negative.

pub fn is_negative(&self) -> bool

Returns true if the number is negative and false if the number is zero or positive.

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Implementations on Foreign Types

impl<T> Signed for Wrapping<T> where
    T: Signed,
    Wrapping<T>: Num,
    Wrapping<T>: Neg,
    <Wrapping<T> as Neg>::Output == Wrapping<T>, 

pub fn abs(&self) -> Wrapping<T>

pub fn abs_sub(&self, other: &Wrapping<T>) -> Wrapping<T>

pub fn signum(&self) -> Wrapping<T>

pub fn is_positive(&self) -> bool

pub fn is_negative(&self) -> bool

impl Signed for i32

pub fn abs(&self) -> i32

pub fn abs_sub(&self, other: &i32) -> i32

pub fn signum(&self) -> i32

pub fn is_positive(&self) -> bool

pub fn is_negative(&self) -> bool

impl Signed for i8

pub fn abs(&self) -> i8

pub fn abs_sub(&self, other: &i8) -> i8

pub fn signum(&self) -> i8

pub fn is_positive(&self) -> bool

pub fn is_negative(&self) -> bool

impl Signed for i16

pub fn abs(&self) -> i16

pub fn abs_sub(&self, other: &i16) -> i16

pub fn signum(&self) -> i16

pub fn is_positive(&self) -> bool

pub fn is_negative(&self) -> bool

impl Signed for i128

pub fn abs(&self) -> i128

pub fn abs_sub(&self, other: &i128) -> i128

pub fn signum(&self) -> i128

pub fn is_positive(&self) -> bool

pub fn is_negative(&self) -> bool

impl Signed for i64

pub fn abs(&self) -> i64

pub fn abs_sub(&self, other: &i64) -> i64

pub fn signum(&self) -> i64

pub fn is_positive(&self) -> bool

pub fn is_negative(&self) -> bool

impl Signed for isize

pub fn abs(&self) -> isize

pub fn abs_sub(&self, other: &isize) -> isize

pub fn signum(&self) -> isize

pub fn is_positive(&self) -> bool

pub fn is_negative(&self) -> bool

impl Signed for f32

pub fn abs(&self) -> f32

Computes the absolute value. Returns NAN if the number is NAN.

pub fn abs_sub(&self, other: &f32) -> f32

The positive difference of two numbers. Returns 0.0 if the number is less than or equal to other, otherwise the difference betweenself and other is returned.

pub fn signum(&self) -> f32

Returns

• 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

pub fn is_positive(&self) -> bool

Returns true if the number is positive, including +0.0 and INFINITY

pub fn is_negative(&self) -> bool

Returns true if the number is negative, including -0.0 and NEG_INFINITY

impl Signed for f64

pub fn abs(&self) -> f64

Computes the absolute value. Returns NAN if the number is NAN.

pub fn abs_sub(&self, other: &f64) -> f64

The positive difference of two numbers. Returns 0.0 if the number is less than or equal to other, otherwise the difference betweenself and other is returned.

pub fn signum(&self) -> f64

Returns

• 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

pub fn is_positive(&self) -> bool

Returns true if the number is positive, including +0.0 and INFINITY

pub fn is_negative(&self) -> bool

Returns true if the number is negative, including -0.0 and NEG_INFINITY

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Implementors

impl Signed for BigInt

pub fn abs(&self) -> BigInt

pub fn abs_sub(&self, other: &BigInt) -> BigInt

pub fn signum(&self) -> BigInt

pub fn is_positive(&self) -> bool

pub fn is_negative(&self) -> bool

impl<T> Signed for Ratio<T> where
    T: Clone + Integer + Signed, 

pub fn abs(&self) -> Ratio<T>

pub fn abs_sub(&self, other: &Ratio<T>) -> Ratio<T>

pub fn signum(&self) -> Ratio<T>

pub fn is_positive(&self) -> bool

pub fn is_negative(&self) -> bool

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