Struct Fraction

pub struct Fraction(/* private fields */);

A fractional value

Used primarily to define the scaling factor for the Duration, Rate, Instant and Clock traits and types.

Implementations

impl Fraction

pub const fn new(numerator: u32, denominator: u32) -> Self

Construct a new Fraction.

A reduction is not performed. Also there is no check for a denominator of 0. If these features are needed, use Fraction::new_reduce()

pub const fn numerator(&self) -> &u32

Return the numerator of the fraction

pub const fn denominator(&self) -> &u32

Return the denominator of the fraction

impl Fraction

pub fn new_reduce( numerator: u32, denominator: u32, ) -> Result<Self, ConversionError>

Construct a new Fraction.

A reduction and denominator == 0 check are performed.

Errors

ConversionError::DivByZero : A 0 denominator was detected

pub fn to_integer(&self) -> u32

Returns the value truncated to an integer

pub fn from_integer(value: u32) -> Self

Constructs a Fraction from an integer.

Equivalent to Fraction::new(value,1).

pub fn recip(self) -> Self

Returns the reciprocal of the fraction

pub fn checked_mul(&self, v: &Self) -> Option<Self>

Checked Fraction × Fraction = Fraction

Returns None for any errors

Examples

assert_eq!(Fraction::new(1000, 1).checked_mul(&Fraction::new(5,5)),
    Some(Fraction::new(5_000, 5)));

assert_eq!(Fraction::new(u32::MAX, 1).checked_mul(&Fraction::new(2,1)),
    None);

pub fn checked_div(&self, v: &Self) -> Option<Self>

Checked Fraction / Fraction = Fraction

Returns None for any errors

Examples

assert_eq!(Fraction::new(1000, 1).checked_div(&Fraction::new(10, 1000)),
    Some(Fraction::new(1_000_000, 10)));

assert_eq!(Fraction::new(1, u32::MAX).checked_div(&Fraction::new(2,1)),
    None);

Trait Implementations

impl Clone for Fraction

fn clone(&self) -> Fraction

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Fraction

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Fraction

fn default() -> Self

Returns the “default value” for a type.

impl Div<Fraction> for u32

fn div(self, rhs: Fraction) -> Self::Output

Panicky u32 / Fraction = u32

type Output = u32

The resulting type after applying the / operator.

impl Div<Fraction> for u64

fn div(self, rhs: Fraction) -> Self::Output

Panicky u64 / Fraction = u64

type Output = u64

The resulting type after applying the / operator.

impl Div for Fraction

fn div(self, rhs: Self) -> Self::Output

Panicky Fraction / Fraction = Fraction

Panics

The same reason the integer operation would panic. Namely, if the result overflows the type.

type Output = Fraction

The resulting type after applying the / operator.

impl Hash for Fraction

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Mul<Fraction> for u32

fn mul(self, rhs: Fraction) -> Self::Output

Panicky u32 × Fraction = u32

type Output = u32

The resulting type after applying the * operator.

impl Mul<Fraction> for u64

fn mul(self, rhs: Fraction) -> Self::Output

Panicky u64 × Fraction = u64

type Output = u64

The resulting type after applying the * operator.

impl Mul for Fraction

fn mul(self, rhs: Self) -> Self::Output

Panicky Fraction × Fraction = Fraction

Panics

The same reason the integer operation would panic. Namely, if the result overflows the type.

type Output = Fraction

The resulting type after applying the * operator.

impl Ord for Fraction

fn cmp(&self, other: &Fraction) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Fraction

fn eq(&self, other: &Fraction) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Fraction

fn partial_cmp(&self, other: &Fraction) -> Option<Ordering>

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

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

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

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

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

impl Copy for Fraction

impl Eq for Fraction

impl StructuralPartialEq for Fraction