Struct sp_runtime::Percent
source · pub struct Percent(_);
Expand description
Re-export top-level arithmetic stuff. A fixed point representation of a number in the range [0, 1].
Percent
Implementations§
source§impl Percent
impl Percent
sourcepub const fn from_parts(parts: u8) -> Percent
pub const fn from_parts(parts: u8) -> Percent
From an explicitly defined number of parts per maximum of the type.
sourcepub const fn from_percent(x: u8) -> Percent
pub const fn from_percent(x: u8) -> Percent
Converts a percent into Self
. Equal to x / 100
.
This can be created at compile time.
sourcepub const fn one() -> Percent
pub const fn one() -> Percent
See PerThing::one
sourcepub fn is_one(&self) -> bool
pub fn is_one(&self) -> bool
See PerThing::is_one
.
sourcepub const fn zero() -> Percent
pub const fn zero() -> Percent
See PerThing::zero
.
sourcepub fn is_zero(&self) -> bool
pub fn is_zero(&self) -> bool
See PerThing::is_zero
.
sourcepub const fn deconstruct(self) -> u8
pub const fn deconstruct(self) -> u8
sourcepub fn square(self) -> Percent
pub fn square(self) -> Percent
See PerThing::square
.
sourcepub fn from_float(x: f64) -> Percent
pub fn from_float(x: f64) -> Percent
See PerThing::from_float
.
sourcepub fn from_rational_approximation<N>(p: N, q: N) -> Percentwhere
N: RationalArg + TryInto<u8> + TryInto<u16>,
u8: Into<N>,
👎Deprecated: Use PerThing::from_rational
instead
pub fn from_rational_approximation<N>(p: N, q: N) -> Percentwhere N: RationalArg + TryInto<u8> + TryInto<u16>, u8: Into<N>,
PerThing::from_rational
insteadsourcepub fn from_rational<N>(p: N, q: N) -> Percentwhere
N: RationalArg + TryInto<u8> + TryInto<u16>,
u8: Into<N>,
pub fn from_rational<N>(p: N, q: N) -> Percentwhere N: RationalArg + TryInto<u8> + TryInto<u16>, u8: Into<N>,
sourcepub fn int_mul(self, b: u8) -> Percent
pub fn int_mul(self, b: u8) -> Percent
Integer multiplication with another value, saturating at 1.
sourcepub fn mul_floor<N>(self, b: N) -> Nwhere
N: MultiplyArg + UniqueSaturatedInto<u8>,
u8: Into<N>,
pub fn mul_floor<N>(self, b: N) -> Nwhere N: MultiplyArg + UniqueSaturatedInto<u8>, u8: Into<N>,
See PerThing::mul_floor
.
sourcepub fn mul_ceil<N>(self, b: N) -> Nwhere
N: MultiplyArg + UniqueSaturatedInto<u8>,
u8: Into<N>,
pub fn mul_ceil<N>(self, b: N) -> Nwhere N: MultiplyArg + UniqueSaturatedInto<u8>, u8: Into<N>,
See PerThing::mul_ceil
.
sourcepub fn saturating_reciprocal_mul<N>(self, b: N) -> Nwhere
N: ReciprocalArg + UniqueSaturatedInto<u8>,
u8: Into<N>,
pub fn saturating_reciprocal_mul<N>(self, b: N) -> Nwhere N: ReciprocalArg + UniqueSaturatedInto<u8>, u8: Into<N>,
sourcepub fn saturating_reciprocal_mul_floor<N>(self, b: N) -> Nwhere
N: ReciprocalArg + UniqueSaturatedInto<u8>,
u8: Into<N>,
pub fn saturating_reciprocal_mul_floor<N>(self, b: N) -> Nwhere N: ReciprocalArg + UniqueSaturatedInto<u8>, u8: Into<N>,
sourcepub fn saturating_reciprocal_mul_ceil<N>(self, b: N) -> Nwhere
N: ReciprocalArg + UniqueSaturatedInto<u8>,
u8: Into<N>,
pub fn saturating_reciprocal_mul_ceil<N>(self, b: N) -> Nwhere N: ReciprocalArg + UniqueSaturatedInto<u8>, u8: Into<N>,
sourcepub fn saturating_div(self, rhs: Percent, r: Rounding) -> Percent
pub fn saturating_div(self, rhs: Percent, r: Rounding) -> Percent
Saturating division. Compute self / rhs
, saturating at one if rhs < self
.
The rounding
method must be specified. e.g.:
let pc = |x| Percent::from_percent(x);
assert_eq!(
pc(2).saturating_div(pc(3), Down),
pc(66),
);
assert_eq!(
pc(1).saturating_div(pc(3), NearestPrefUp),
pc(33),
);
assert_eq!(
pc(2).saturating_div(pc(3), NearestPrefDown),
pc(67),
);
assert_eq!(
pc(1).saturating_div(pc(3), Up),
pc(34),
);
Trait Implementations§
source§impl CheckedAdd for Percent
impl CheckedAdd for Percent
source§impl CheckedMul for Percent
impl CheckedMul for Percent
Note
CheckedMul will never fail for PerThings.
source§impl CheckedSub for Percent
impl CheckedSub for Percent
source§impl CompactAs for Percent
impl CompactAs for Percent
Implementation makes any compact encoding of PerThing::Inner
valid,
when decoding it will saturate up to PerThing::ACCURACY
.
source§impl Decode for Percent
impl Decode for Percent
source§impl<'de> Deserialize<'de> for Percent
impl<'de> Deserialize<'de> for Percent
source§fn deserialize<__D>(
__deserializer: __D
) -> Result<Percent, <__D as Deserializer<'de>>::Error>where
__D: Deserializer<'de>,
fn deserialize<__D>( __deserializer: __D ) -> Result<Percent, <__D as Deserializer<'de>>::Error>where __D: Deserializer<'de>,
source§impl Encode for Percent
impl Encode for Percent
source§fn encode_to<__CodecOutputEdqy>(
&self,
__codec_dest_edqy: &mut __CodecOutputEdqy
)where
__CodecOutputEdqy: Output + ?Sized,
fn encode_to<__CodecOutputEdqy>( &self, __codec_dest_edqy: &mut __CodecOutputEdqy )where __CodecOutputEdqy: Output + ?Sized,
source§fn using_encoded<R, F>(&self, f: F) -> Rwhere
F: FnOnce(&[u8]) -> R,
fn using_encoded<R, F>(&self, f: F) -> Rwhere F: FnOnce(&[u8]) -> R,
source§fn size_hint(&self) -> usize
fn size_hint(&self) -> usize
source§fn encoded_size(&self) -> usize
fn encoded_size(&self) -> usize
source§impl MaxEncodedLen for Percent
impl MaxEncodedLen for Percent
source§fn max_encoded_len() -> usize
fn max_encoded_len() -> usize
source§impl<N> Mul<N> for Percentwhere
N: Div<N, Output = N> + Clone + Mul<N, Output = N> + UniqueSaturatedInto<u8> + Add<N, Output = N> + Rem<N, Output = N> + Unsigned,
u8: Into<N>,
impl<N> Mul<N> for Percentwhere N: Div<N, Output = N> + Clone + Mul<N, Output = N> + UniqueSaturatedInto<u8> + Add<N, Output = N> + Rem<N, Output = N> + Unsigned, u8: Into<N>,
Non-overflow multiplication.
This is tailored to be used with a balance type.
source§impl Ord for Percent
impl Ord for Percent
source§impl PartialEq<Percent> for Percent
impl PartialEq<Percent> for Percent
source§impl PartialOrd<Percent> for Percent
impl PartialOrd<Percent> for Percent
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moresource§impl PerThing for Percent
impl PerThing for Percent
source§fn deconstruct(self) -> <Percent as PerThing>::Inner
fn deconstruct(self) -> <Percent as PerThing>::Inner
Consume self and return the number of parts per thing.
source§fn from_parts(parts: <Percent as PerThing>::Inner) -> Percent
fn from_parts(parts: <Percent as PerThing>::Inner) -> Percent
Build this type from a number of parts per thing.
source§fn from_float(x: f64) -> Percent
fn from_float(x: f64) -> Percent
NOTE: saturate to 0 or 1 if x is beyond [0, 1]
§type Upper = u16
type Upper = u16
Self::Inner
, used to avoid overflow in some computations.
It must be able to compute ACCURACY^2
.source§const ACCURACY: <Percent as PerThing>::Inner = {transmute(0x64): <sp_arithmetic::Percent as sp_arithmetic::PerThing>::Inner}
const ACCURACY: <Percent as PerThing>::Inner = {transmute(0x64): <sp_arithmetic::Percent as sp_arithmetic::PerThing>::Inner}
source§fn from_rational_with_rounding<N>(
p: N,
q: N,
r: Rounding
) -> Result<Percent, ()>where
N: Clone + Ord + TryInto<<Percent as PerThing>::Inner> + TryInto<<Percent as PerThing>::Upper> + Div<N, Output = N> + Rem<N, Output = N> + Add<N, Output = N> + AddAssign<N> + Unsigned + Zero + One,
<Percent as PerThing>::Inner: Into<N>,
fn from_rational_with_rounding<N>( p: N, q: N, r: Rounding ) -> Result<Percent, ()>where N: Clone + Ord + TryInto<<Percent as PerThing>::Inner> + TryInto<<Percent as PerThing>::Upper> + Div<N, Output = N> + Rem<N, Output = N> + Add<N, Output = N> + AddAssign<N> + Unsigned + Zero + One, <Percent as PerThing>::Inner: Into<N>,
p/q
into a per-thing fraction. Read moresource§fn less_epsilon(self) -> Self
fn less_epsilon(self) -> Self
self
or self
if it is already zero.source§fn try_less_epsilon(self) -> Result<Self, Self>
fn try_less_epsilon(self) -> Result<Self, Self>
self
or an error with the same value if self
is already
zero.source§fn plus_epsilon(self) -> Self
fn plus_epsilon(self) -> Self
self
or self
if it is already one.source§fn try_plus_epsilon(self) -> Result<Self, Self>
fn try_plus_epsilon(self) -> Result<Self, Self>
self
or an error with the same value if self
is already
one.source§fn from_percent(x: Self::Inner) -> Self
fn from_percent(x: Self::Inner) -> Self
Self::from_parts(x * Self::ACCURACY / 100)
but more accurate and can cope with potential type overflows.source§fn left_from_one(self) -> Self
fn left_from_one(self) -> Self
self
is saturating-subtracted from Self::one()
.source§fn mul_floor<N>(self, b: N) -> Nwhere
N: MultiplyArg + UniqueSaturatedInto<Self::Inner>,
Self::Inner: Into<N>,
fn mul_floor<N>(self, b: N) -> Nwhere N: MultiplyArg + UniqueSaturatedInto<Self::Inner>, Self::Inner: Into<N>,
Mul
rounds to the
nearest whole number. Read moresource§fn mul_ceil<N>(self, b: N) -> Nwhere
N: MultiplyArg + UniqueSaturatedInto<Self::Inner>,
Self::Inner: Into<N>,
fn mul_ceil<N>(self, b: N) -> Nwhere N: MultiplyArg + UniqueSaturatedInto<Self::Inner>, Self::Inner: Into<N>,
Mul
rounds to the nearest whole number. Read moresource§fn saturating_reciprocal_mul<N>(self, b: N) -> Nwhere
N: ReciprocalArg + UniqueSaturatedInto<Self::Inner>,
Self::Inner: Into<N>,
fn saturating_reciprocal_mul<N>(self, b: N) -> Nwhere N: ReciprocalArg + UniqueSaturatedInto<Self::Inner>, Self::Inner: Into<N>,
self
. The result is rounded to the
nearest whole number and saturates at the numeric bounds instead of overflowing. Read moresource§fn saturating_reciprocal_mul_floor<N>(self, b: N) -> Nwhere
N: ReciprocalArg + UniqueSaturatedInto<Self::Inner>,
Self::Inner: Into<N>,
fn saturating_reciprocal_mul_floor<N>(self, b: N) -> Nwhere N: ReciprocalArg + UniqueSaturatedInto<Self::Inner>, Self::Inner: Into<N>,
self
. The result is rounded down to the
nearest whole number and saturates at the numeric bounds instead of overflowing. Read moresource§fn saturating_reciprocal_mul_ceil<N>(self, b: N) -> Nwhere
N: ReciprocalArg + UniqueSaturatedInto<Self::Inner>,
Self::Inner: Into<N>,
fn saturating_reciprocal_mul_ceil<N>(self, b: N) -> Nwhere N: ReciprocalArg + UniqueSaturatedInto<Self::Inner>, Self::Inner: Into<N>,
self
. The result is rounded up to the
nearest whole number and saturates at the numeric bounds instead of overflowing. Read moresource§fn from_rational<N>(p: N, q: N) -> Selfwhere
N: RationalArg + TryInto<Self::Inner> + TryInto<Self::Upper>,
Self::Inner: Into<N>,
fn from_rational<N>(p: N, q: N) -> Selfwhere N: RationalArg + TryInto<Self::Inner> + TryInto<Self::Upper>, Self::Inner: Into<N>,
p/q
into a per-thing fraction. This will never overflow. Read moresource§fn from_rational_approximation<N>(p: N, q: N) -> Selfwhere
N: RationalArg + TryInto<Self::Inner> + TryInto<Self::Upper>,
Self::Inner: Into<N>,
fn from_rational_approximation<N>(p: N, q: N) -> Selfwhere N: RationalArg + TryInto<Self::Inner> + TryInto<Self::Upper>, Self::Inner: Into<N>,
Self::from_rational
.source§impl Saturating for Percent
impl Saturating for Percent
source§fn saturating_add(self, rhs: Percent) -> Percent
fn saturating_add(self, rhs: Percent) -> Percent
Saturating addition. Compute self + rhs
, saturating at the numeric bounds instead of
overflowing. This operation is lossless if it does not saturate.
source§fn saturating_sub(self, rhs: Percent) -> Percent
fn saturating_sub(self, rhs: Percent) -> Percent
Saturating subtraction. Compute self - rhs
, saturating at the numeric bounds instead of
overflowing. This operation is lossless if it does not saturate.
source§fn saturating_mul(self, rhs: Percent) -> Percent
fn saturating_mul(self, rhs: Percent) -> Percent
Saturating multiply. Compute self * rhs
, saturating at the numeric bounds instead of
overflowing. This operation is lossy.
source§fn saturating_pow(self, exp: usize) -> Percent
fn saturating_pow(self, exp: usize) -> Percent
Saturating exponentiation. Computes self.pow(exp)
, saturating at the numeric
bounds instead of overflowing. This operation is lossy.
source§fn saturating_inc(&mut self)where
Self: One,
fn saturating_inc(&mut self)where Self: One,
source§fn saturating_dec(&mut self)where
Self: One,
fn saturating_dec(&mut self)where Self: One,
source§fn saturating_accrue(&mut self, amount: Self)where
Self: One,
fn saturating_accrue(&mut self, amount: Self)where Self: One,
amount
, saturating.source§fn saturating_reduce(&mut self, amount: Self)where
Self: One,
fn saturating_reduce(&mut self, amount: Self)where Self: One,
amount
, saturating at zero.source§impl SaturatingAdd for Percent
impl SaturatingAdd for Percent
source§fn saturating_add(&self, v: &Percent) -> Percent
fn saturating_add(&self, v: &Percent) -> Percent
self + other
, saturating at the relevant high or low boundary of
the type.source§impl SaturatingSub for Percent
impl SaturatingSub for Percent
source§fn saturating_sub(&self, v: &Percent) -> Percent
fn saturating_sub(&self, v: &Percent) -> Percent
self - other
, saturating at the relevant high or low boundary of
the type.source§impl Serialize for Percent
impl Serialize for Percent
source§fn serialize<__S>(
&self,
__serializer: __S
) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>where
__S: Serializer,
fn serialize<__S>( &self, __serializer: __S ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>where __S: Serializer,
impl Copy for Percent
impl EncodeLike<Percent> for Percent
impl Eq for Percent
impl StructuralEq for Percent
impl StructuralPartialEq for Percent
Auto Trait Implementations§
impl RefUnwindSafe for Percent
impl Send for Percent
impl Sync for Percent
impl Unpin for Percent
impl UnwindSafe for Percent
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
source§impl<T> CheckedConversion for T
impl<T> CheckedConversion for T
source§impl<T> DecodeLimit for Twhere
T: Decode,
impl<T> DecodeLimit for Twhere T: Decode,
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T: Any,
impl<T> Downcast for Twhere T: Any,
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fn into_any(self: Box<T, Global>) -> Box<dyn Any, Global>
Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
.source§fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>
Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
.source§fn as_any(&self) -> &(dyn Any + 'static)
fn as_any(&self) -> &(dyn Any + 'static)
&Trait
(where Trait: Downcast
) to &Any
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’s vtable from &Trait
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) to &Any
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’s.source§impl<T> EnsureAdd for Twhere
T: EnsureAddAssign,
impl<T> EnsureAdd for Twhere T: EnsureAddAssign,
source§fn ensure_add(self, v: Self) -> Result<Self, ArithmeticError>
fn ensure_add(self, v: Self) -> Result<Self, ArithmeticError>
source§impl<T> EnsureAddAssign for Twhere
T: CheckedAdd + PartialOrd<T> + Zero,
impl<T> EnsureAddAssign for Twhere T: CheckedAdd + PartialOrd<T> + Zero,
source§fn ensure_add_assign(&mut self, v: Self) -> Result<(), ArithmeticError>
fn ensure_add_assign(&mut self, v: Self) -> Result<(), ArithmeticError>
source§impl<T, S> EnsureFrom<S> for Twhere
T: TryFrom<S> + PartialOrd<T> + Zero,
S: PartialOrd<S> + Zero,
impl<T, S> EnsureFrom<S> for Twhere T: TryFrom<S> + PartialOrd<T> + Zero, S: PartialOrd<S> + Zero,
source§fn ensure_from(other: T) -> Result<Self, ArithmeticError>
fn ensure_from(other: T) -> Result<Self, ArithmeticError>
ArithmeticError
if fails. Read moresource§impl<T, S> EnsureInto<S> for Twhere
T: TryInto<S> + PartialOrd<T> + Zero,
S: PartialOrd<S> + Zero,
impl<T, S> EnsureInto<S> for Twhere T: TryInto<S> + PartialOrd<T> + Zero, S: PartialOrd<S> + Zero,
source§fn ensure_into(self) -> Result<T, ArithmeticError>
fn ensure_into(self) -> Result<T, ArithmeticError>
ArithmeticError
if fails. Read moresource§impl<T> EnsureMul for Twhere
T: EnsureMulAssign,
impl<T> EnsureMul for Twhere T: EnsureMulAssign,
source§fn ensure_mul(self, v: Self) -> Result<Self, ArithmeticError>
fn ensure_mul(self, v: Self) -> Result<Self, ArithmeticError>
source§impl<T> EnsureMulAssign for Twhere
T: CheckedMul + PartialOrd<T> + Zero,
impl<T> EnsureMulAssign for Twhere T: CheckedMul + PartialOrd<T> + Zero,
source§fn ensure_mul_assign(&mut self, v: Self) -> Result<(), ArithmeticError>
fn ensure_mul_assign(&mut self, v: Self) -> Result<(), ArithmeticError>
source§impl<T> EnsureSub for Twhere
T: EnsureSubAssign,
impl<T> EnsureSub for Twhere T: EnsureSubAssign,
source§fn ensure_sub(self, v: Self) -> Result<Self, ArithmeticError>
fn ensure_sub(self, v: Self) -> Result<Self, ArithmeticError>
source§impl<T> EnsureSubAssign for Twhere
T: CheckedSub + PartialOrd<T> + Zero,
impl<T> EnsureSubAssign for Twhere T: CheckedSub + PartialOrd<T> + Zero,
source§fn ensure_sub_assign(&mut self, v: Self) -> Result<(), ArithmeticError>
fn ensure_sub_assign(&mut self, v: Self) -> Result<(), ArithmeticError>
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