Struct sp_arithmetic::per_things::Perquintill

pub struct Perquintill(_);

A fixed point representation of a number in the range [0, 1].

Parts per Quintillion

Implementations

impl Perquintill

pub const fn from_parts(parts: u64) -> Self

From an explicitly defined number of parts per maximum of the type.

pub const fn from_percent(x: u64) -> Self

Converts a percent into Self. Equal to x / 100.

This can be created at compile time.

pub const fn one() -> Self

See PerThing::one

pub fn is_one(&self) -> bool

See PerThing::is_one.

pub const fn zero() -> Self

See PerThing::zero.

pub fn is_zero(&self) -> bool

See PerThing::is_zero.

pub const fn deconstruct(self) -> u64

See PerThing::deconstruct.

pub fn square(self) -> Self

See PerThing::square.

pub fn from_fraction(x: f64) -> Self

See PerThing::from_fraction.

pub fn from_rational_approximation<N>(p: N, q: N) -> Self where
    N: Clone + Ord + TryInto<u64> + TryInto<u128> + Div<N, Output = N> + Rem<N, Output = N> + Add<N, Output = N> + Unsigned,
    u64: Into<N>, 

See PerThing::from_rational_approximation.

pub fn mul_floor<N>(self, b: N) -> N where
    N: Clone + UniqueSaturatedInto<u64> + Rem<N, Output = N> + Div<N, Output = N> + Mul<N, Output = N> + Add<N, Output = N> + Unsigned,
    u64: Into<N>, 

See PerThing::mul_floor.

pub fn mul_ceil<N>(self, b: N) -> N where
    N: Clone + UniqueSaturatedInto<u64> + Rem<N, Output = N> + Div<N, Output = N> + Mul<N, Output = N> + Add<N, Output = N> + Unsigned,
    u64: Into<N>, 

See PerThing::mul_ceil.

pub fn saturating_reciprocal_mul<N>(self, b: N) -> N where
    N: Clone + UniqueSaturatedInto<u64> + Rem<N, Output = N> + Div<N, Output = N> + Mul<N, Output = N> + Add<N, Output = N> + Saturating + Unsigned,
    u64: Into<N>, 

See PerThing::saturating_reciprocal_mul.

pub fn saturating_reciprocal_mul_floor<N>(self, b: N) -> N where
    N: Clone + UniqueSaturatedInto<u64> + Rem<N, Output = N> + Div<N, Output = N> + Mul<N, Output = N> + Add<N, Output = N> + Saturating + Unsigned,
    u64: Into<N>, 

See PerThing::saturating_reciprocal_mul_floor.

pub fn saturating_reciprocal_mul_ceil<N>(self, b: N) -> N where
    N: Clone + UniqueSaturatedInto<u64> + Rem<N, Output = N> + Div<N, Output = N> + Mul<N, Output = N> + Add<N, Output = N> + Saturating + Unsigned,
    u64: Into<N>, 

See PerThing::saturating_reciprocal_mul_ceil.

impl Perquintill

pub const fn from_perthousand(x: u64) -> Self

Converts a percent into Self. Equal to x / 1000.

This can be created at compile time.

Trait Implementations

impl Bounded for Perquintill

fn min_value() -> Self

returns the smallest finite number this type can represent

fn max_value() -> Self

returns the largest finite number this type can represent

impl Clone for Perquintill

fn clone(&self) -> Perquintill

Returns a copy of the value.

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

Performs copy-assignment from source.

impl CompactAs for Perquintill

Implementation makes any compact encoding of PerThing::Inner valid, when decoding it will saturate up to PerThing::ACCURACY.

type As = u64

A compact-encodable type that should be used as the encoding.

fn encode_as(&self) -> &Self::As

Returns the compact-encodable type.

fn decode_from(x: Self::As) -> Result<Self, Error>

Decode Self from the compact-decoded type.

impl Copy for Perquintill

impl Debug for Perquintill

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

Formats the value using the given formatter.

impl Decode for Perquintill

fn decode<I: Input>(input: &mut I) -> Result<Self, Error>

Attempt to deserialise the value from input.

pub fn skip<I>(input: &mut I) -> Result<(), Error> where
    I: Input, 

Attempt to skip the encoded value from input.

pub fn encoded_fixed_size() -> Option<usize>

Returns the fixed encoded size of the type.

impl Default for Perquintill

fn default() -> Self

Returns the "default value" for a type.

impl<'de> Deserialize<'de> for Perquintill

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
    __D: Deserializer<'de>, 

Deserialize this value from the given Serde deserializer.

impl Div<Perquintill> for Perquintill

type Output = Self

The resulting type after applying the / operator.

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

Performs the / operation.

impl Encode for Perquintill

fn encode_to<__CodecOutputEdqy: Output + ?Sized>(
    &self,
    __codec_dest_edqy: &mut __CodecOutputEdqy
)

Convert self to a slice and append it to the destination.

fn encode(&self) -> Vec<u8>

Convert self to an owned vector.

fn using_encoded<R, F: FnOnce(&[u8]) -> R>(&self, f: F) -> R

Convert self to a slice and then invoke the given closure with it.

pub fn size_hint(&self) -> usize

If possible give a hint of expected size of the encoding.

pub fn encoded_size(&self) -> usize

Calculates the encoded size.

impl EncodeLike<Perquintill> for Perquintill

impl Eq for Perquintill

impl From<Compact<Perquintill>> for Perquintill

fn from(x: Compact<Perquintill>) -> Perquintill

Performs the conversion.

impl<N> Mul<N> for Perquintill where
    N: Clone + UniqueSaturatedInto<u64> + Rem<N, Output = N> + Div<N, Output = N> + Mul<N, Output = N> + Add<N, Output = N> + Unsigned,
    u64: Into<N>, 

Non-overflow multiplication.

This is tailored to be used with a balance type.

type Output = N

The resulting type after applying the * operator.

fn mul(self, b: N) -> Self::Output

Performs the * operation.

impl Ord for Perquintill

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

Restrict a value to a certain interval.

impl PartialEq<Perquintill> for Perquintill

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

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

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

This method tests for !=.

impl PartialOrd<Perquintill> for Perquintill

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

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

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

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

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

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

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

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

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

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

impl PerThing for Perquintill

type Inner = u64

The data type used to build this per-thingy.

type Upper = u128

A data type larger than Self::Inner, used to avoid overflow in some computations. It must be able to compute ACCURACY^2.

const ACCURACY: Self::Inner

The accuracy of this type.

fn deconstruct(self) -> Self::Inner

Consume self and return the number of parts per thing.

fn from_parts(parts: Self::Inner) -> Self

Build this type from a number of parts per thing.

fn from_fraction(x: f64) -> Self

NOTE: saturate to 0 or 1 if x is beyond [0, 1]

fn from_rational_approximation<N>(p: N, q: N) -> Self where
    N: Clone + Ord + TryInto<Self::Inner> + TryInto<Self::Upper> + Div<N, Output = N> + Rem<N, Output = N> + Add<N, Output = N> + Unsigned + Zero + One,
    Self::Inner: Into<N>, 

Approximate the fraction p/q into a per-thing fraction. This will never overflow.

fn zero() -> Self

Equivalent to Self::from_parts(0).

fn is_zero(&self) -> bool

Return true if this is nothing.

fn one() -> Self

Equivalent to Self::from_parts(Self::ACCURACY).

fn is_one(&self) -> bool

Return true if this is one.

fn from_percent(x: Self::Inner) -> Self

Build this type from a percent. Equivalent to Self::from_parts(x * Self::ACCURACY / 100) but more accurate and can cope with potential type overflows.

fn square(self) -> Self

Return the product of multiplication of this value by itself.

fn mul_floor<N>(self, b: N) -> N where
    N: Clone + UniqueSaturatedInto<Self::Inner> + Rem<N, Output = N> + Div<N, Output = N> + Mul<N, Output = N> + Add<N, Output = N> + Unsigned,
    Self::Inner: Into<N>, 

Multiplication that always rounds down to a whole number. The standard Mul rounds to the nearest whole number.

fn mul_ceil<N>(self, b: N) -> N where
    N: Clone + UniqueSaturatedInto<Self::Inner> + Rem<N, Output = N> + Div<N, Output = N> + Mul<N, Output = N> + Add<N, Output = N> + Unsigned,
    Self::Inner: Into<N>, 

Multiplication that always rounds the result up to a whole number. The standard Mul rounds to the nearest whole number.

fn saturating_reciprocal_mul<N>(self, b: N) -> N where
    N: Clone + UniqueSaturatedInto<Self::Inner> + Rem<N, Output = N> + Div<N, Output = N> + Mul<N, Output = N> + Add<N, Output = N> + Saturating + Unsigned,
    Self::Inner: Into<N>, 

Saturating multiplication by the reciprocal of self. The result is rounded to the nearest whole number and saturates at the numeric bounds instead of overflowing.

fn saturating_reciprocal_mul_floor<N>(self, b: N) -> N where
    N: Clone + UniqueSaturatedInto<Self::Inner> + Rem<N, Output = N> + Div<N, Output = N> + Mul<N, Output = N> + Add<N, Output = N> + Saturating + Unsigned,
    Self::Inner: Into<N>, 

Saturating multiplication by the reciprocal of self. The result is rounded down to the nearest whole number and saturates at the numeric bounds instead of overflowing.

fn saturating_reciprocal_mul_ceil<N>(self, b: N) -> N where
    N: Clone + UniqueSaturatedInto<Self::Inner> + Rem<N, Output = N> + Div<N, Output = N> + Mul<N, Output = N> + Add<N, Output = N> + Saturating + Unsigned,
    Self::Inner: Into<N>, 

Saturating multiplication by the reciprocal of self. The result is rounded up to the nearest whole number and saturates at the numeric bounds instead of overflowing.

impl Saturating for Perquintill

fn saturating_add(self, rhs: Self) -> Self

Saturating addition. Compute self + rhs, saturating at the numeric bounds instead of overflowing. This operation is lossless if it does not saturate.

fn saturating_sub(self, rhs: Self) -> Self

Saturating subtraction. Compute self - rhs, saturating at the numeric bounds instead of overflowing. This operation is lossless if it does not saturate.

fn saturating_mul(self, rhs: Self) -> Self

Saturating multiply. Compute self * rhs, saturating at the numeric bounds instead of overflowing. This operation is lossy.

fn saturating_pow(self, exp: usize) -> Self

Saturating exponentiation. Computes self.pow(exp), saturating at the numeric bounds instead of overflowing. This operation is lossy.

impl Serialize for Perquintill

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error> where
    __S: Serializer, 

Serialize this value into the given Serde serializer.

impl StructuralEq for Perquintill

impl StructuralPartialEq for Perquintill