Struct sp_runtime::Rational128

[+] Show declaration

pub struct Rational128(_, _);

[−] Expand description

Re-export top-level arithmetic stuff. A wrapper for any rational number with a 128 bit numerator and denominator.

Implementations

impl Rational128[−]

[−] Expand description

Re-export top-level arithmetic stuff.

pub fn zero() -> Rational128[−]

Nothing.

pub fn is_zero(&self) -> bool[−]

If it is zero or not

pub fn from(n: u128, d: u128) -> Rational128[−]

Build from a raw n/d.

pub fn from_unchecked(n: u128, d: u128) -> Rational128[−]

Build from a raw n/d. This could lead to / 0 if not properly handled.

pub fn n(&self) -> u128[−]

Return the numerator.

pub fn d(&self) -> u128[−]

Return the denominator.

pub fn to_den(self, den: u128) -> Result<Rational128, &'static str>[−]

Convert self to a similar rational number where denominator is the given den. This only returns if the result is accurate. Err is returned if the result cannot be accurately calculated.

pub fn lcm(&self, other: &Rational128) -> Result<u128, &'static str>[−]

Get the least common divisor of self and other.

This only returns if the result is accurate. Err is returned if the result cannot be accurately calculated.

pub fn lazy_saturating_add(self, other: Rational128) -> Rational128[−]

A saturating add that assumes self and other have the same denominator.

pub fn lazy_saturating_sub(self, other: Rational128) -> Rational128[−]

A saturating subtraction that assumes self and other have the same denominator.

pub fn checked_add(
    self,
    other: Rational128
) -> Result<Rational128, &'static str>[−]

Addition. Simply tries to unify the denominators and add the numerators.

Overflow might happen during any of the steps. Error is returned in such cases.

pub fn checked_sub(
    self,
    other: Rational128
) -> Result<Rational128, &'static str>[−]

Subtraction. Simply tries to unify the denominators and subtract the numerators.

Overflow might happen during any of the steps. None is returned in such cases.

Trait Implementations

impl Clone for Rational128[+]

[+] Show hidden undocumented items

fn clone(&self) -> Rational128[−]

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)[−]

Performs copy-assignment from source.

impl Copy for Rational128

impl Debug for Rational128[+]

[+] Show hidden undocumented items

fn fmt(&self, fmt: &mut Formatter<'_>) -> Result<(), Error>[−]

Formats the value using the given formatter.

impl Default for Rational128[+]

[+] Show hidden undocumented items

fn default() -> Rational128[−]

Returns the "default value" for a type.

impl Eq for Rational128

impl Ord for Rational128[+]

[+] Show hidden undocumented items

fn cmp(&self, other: &Rational128) -> Ordering[−]

This method returns an Ordering between self and other.

[+] Expand attributes

#[must_use]fn max(self, other: Self) -> Self[−]

Compares and returns the maximum of two values.

[+] Expand attributes

#[must_use]fn min(self, other: Self) -> Self[−]

Compares and returns the minimum of two values.

[+] Expand attributes

#[must_use]fn clamp(self, min: Self, max: Self) -> Self[−]

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl PartialEq<Rational128> for Rational128[+]

[+] Show hidden undocumented items

fn eq(&self, other: &Rational128) -> bool[−]

This method tests for self and other values to be equal, and is used by ==.

[+] Expand attributes

#[must_use]fn ne(&self, other: &Rhs) -> bool[−]

This method tests for !=.

impl PartialOrd<Rational128> for Rational128[+]

[+] Show hidden undocumented items

fn partial_cmp(&self, other: &Rational128) -> Option<Ordering>[−]

This method returns an ordering between self and other values if one exists.

[+] Expand attributes

#[must_use]fn lt(&self, other: &Rhs) -> bool[−]

This method tests less than (for self and other) and is used by the < operator.

[+] Expand attributes

#[must_use]fn le(&self, other: &Rhs) -> bool[−]

This method tests less than or equal to (for self and other) and is used by the <= operator.

[+] Expand attributes

#[must_use]fn gt(&self, other: &Rhs) -> bool[−]

This method tests greater than (for self and other) and is used by the > operator.

[+] Expand attributes

#[must_use]fn ge(&self, other: &Rhs) -> bool[−]

This method tests greater than or equal to (for self and other) and is used by the >= operator.