Struct sp_runtime::Percent
pub struct Percent(/* private fields */);
Expand description
Re-export top-level arithmetic stuff. A fixed point representation of a number in the range [0, 1].
Percent
Implementations§
§impl Percent
impl Percent
pub 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.
pub 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.
pub const fn one() -> Percent
pub const fn one() -> Percent
See PerThing::one
pub fn is_one(&self) -> bool
pub fn is_one(&self) -> bool
See PerThing::is_one
.
pub const fn zero() -> Percent
pub const fn zero() -> Percent
See PerThing::zero
.
pub fn is_zero(&self) -> bool
pub fn is_zero(&self) -> bool
See PerThing::is_zero
.
pub const fn deconstruct(self) -> u8
pub const fn deconstruct(self) -> u8
pub fn square(self) -> Percent
pub fn square(self) -> Percent
See PerThing::square
.
pub fn from_float(x: f64) -> Percent
pub fn from_float(x: f64) -> Percent
See PerThing::from_float
.
pub fn from_rational_approximation<N>(p: N, q: N) -> Percent
👎Deprecated: Use PerThing::from_rational
instead
pub fn from_rational_approximation<N>(p: N, q: N) -> Percent
PerThing::from_rational
insteadpub fn from_rational<N>(p: N, q: N) -> Percent
pub fn from_rational<N>(p: N, q: N) -> Percent
pub fn mul_floor<N>(self, b: N) -> N
pub fn mul_floor<N>(self, b: N) -> N
See PerThing::mul_floor
.
pub fn mul_ceil<N>(self, b: N) -> N
pub fn mul_ceil<N>(self, b: N) -> N
See PerThing::mul_ceil
.
pub fn saturating_reciprocal_mul<N>(self, b: N) -> N
pub fn saturating_reciprocal_mul<N>(self, b: N) -> N
pub fn saturating_reciprocal_mul_floor<N>(self, b: N) -> N
pub fn saturating_reciprocal_mul_floor<N>(self, b: N) -> N
pub fn saturating_reciprocal_mul_ceil<N>(self, b: N) -> N
pub fn saturating_reciprocal_mul_ceil<N>(self, b: N) -> N
pub 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§
§impl CheckedAdd for Percent
impl CheckedAdd for Percent
§fn checked_add(&self, rhs: &Percent) -> Option<Percent>
fn checked_add(&self, rhs: &Percent) -> Option<Percent>
None
is
returned.§impl CheckedMul for Percent
impl CheckedMul for Percent
§Note
CheckedMul will never fail for PerThings.
§fn checked_mul(&self, rhs: &Percent) -> Option<Percent>
fn checked_mul(&self, rhs: &Percent) -> Option<Percent>
None
is returned.§impl CheckedSub for Percent
impl CheckedSub for Percent
§fn checked_sub(&self, v: &Percent) -> Option<Percent>
fn checked_sub(&self, v: &Percent) -> Option<Percent>
None
is returned.§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
.
§impl Decode for Percent
impl Decode for Percent
§fn decode<I>(input: &mut I) -> Result<Percent, Error>where
I: Input,
fn decode<I>(input: &mut I) -> Result<Percent, Error>where
I: Input,
§fn decode_into<I>(
input: &mut I,
dst: &mut MaybeUninit<Self>,
) -> Result<DecodeFinished, Error>where
I: Input,
fn decode_into<I>(
input: &mut I,
dst: &mut MaybeUninit<Self>,
) -> Result<DecodeFinished, Error>where
I: Input,
§fn skip<I>(input: &mut I) -> Result<(), Error>where
I: Input,
fn skip<I>(input: &mut I) -> Result<(), Error>where
I: Input,
§fn encoded_fixed_size() -> Option<usize>
fn encoded_fixed_size() -> Option<usize>
§impl<'de> Deserialize<'de> for Percent
impl<'de> Deserialize<'de> for Percent
§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>,
§impl Encode for Percent
impl Encode for Percent
§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,
§fn using_encoded<__CodecOutputReturn, __CodecUsingEncodedCallback>(
&self,
f: __CodecUsingEncodedCallback,
) -> __CodecOutputReturn
fn using_encoded<__CodecOutputReturn, __CodecUsingEncodedCallback>( &self, f: __CodecUsingEncodedCallback, ) -> __CodecOutputReturn
§fn encoded_size(&self) -> usize
fn encoded_size(&self) -> usize
§impl MaxEncodedLen for Percent
impl MaxEncodedLen for Percent
§fn max_encoded_len() -> usize
fn max_encoded_len() -> usize
§impl<N> Mul<N> for Percent
impl<N> Mul<N> for Percent
Non-overflow multiplication.
This is tailored to be used with a balance type.
§impl Ord for Percent
impl Ord for Percent
§impl PartialOrd for Percent
impl PartialOrd for Percent
§fn partial_cmp(&self, other: &Percent) -> Option<Ordering>
fn partial_cmp(&self, other: &Percent) -> Option<Ordering>
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 more§impl PerThing for Percent
impl PerThing for Percent
§fn deconstruct(self) -> <Percent as PerThing>::Inner
fn deconstruct(self) -> <Percent as PerThing>::Inner
Consume self and return the number of parts per thing.
§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.
§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
.§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}
§fn from_rational_with_rounding<N>(
p: N,
q: N,
r: Rounding,
) -> Result<Percent, ()>
fn from_rational_with_rounding<N>( p: N, q: N, r: Rounding, ) -> Result<Percent, ()>
p/q
into a per-thing fraction. Read more§fn less_epsilon(self) -> Self
fn less_epsilon(self) -> Self
self
or self
if it is already zero.§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.§fn plus_epsilon(self) -> Self
fn plus_epsilon(self) -> Self
self
or self
if it is already one.§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.§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.§fn left_from_one(self) -> Self
fn left_from_one(self) -> Self
self
is saturating-subtracted from Self::one()
.§fn mul_floor<N>(self, b: N) -> N
fn mul_floor<N>(self, b: N) -> N
Mul
rounds to the
nearest whole number. Read more§fn mul_ceil<N>(self, b: N) -> N
fn mul_ceil<N>(self, b: N) -> N
Mul
rounds to the nearest whole number. Read more§fn saturating_reciprocal_mul<N>(self, b: N) -> N
fn saturating_reciprocal_mul<N>(self, b: N) -> N
self
. The result is rounded to the
nearest whole number and saturates at the numeric bounds instead of overflowing. Read more§fn saturating_reciprocal_mul_floor<N>(self, b: N) -> N
fn saturating_reciprocal_mul_floor<N>(self, b: N) -> N
self
. The result is rounded down to the
nearest whole number and saturates at the numeric bounds instead of overflowing. Read more§fn saturating_reciprocal_mul_ceil<N>(self, b: N) -> N
fn saturating_reciprocal_mul_ceil<N>(self, b: N) -> N
self
. The result is rounded up to the
nearest whole number and saturates at the numeric bounds instead of overflowing. Read more§fn from_rational<N>(p: N, q: N) -> Self
fn from_rational<N>(p: N, q: N) -> Self
p/q
into a per-thing fraction. This will never overflow. Read more§impl Saturating for Percent
impl Saturating for Percent
§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.
§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.
§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.
§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.
§fn saturating_less_one(self) -> Selfwhere
Self: One,
fn saturating_less_one(self) -> Selfwhere
Self: One,
§fn saturating_plus_one(self) -> Selfwhere
Self: One,
fn saturating_plus_one(self) -> Selfwhere
Self: One,
§fn saturating_inc(&mut self)where
Self: One,
fn saturating_inc(&mut self)where
Self: One,
§fn saturating_dec(&mut self)where
Self: One,
fn saturating_dec(&mut self)where
Self: One,
§fn saturating_accrue(&mut self, amount: Self)where
Self: One,
fn saturating_accrue(&mut self, amount: Self)where
Self: One,
amount
, saturating.§fn saturating_reduce(&mut self, amount: Self)where
Self: One,
fn saturating_reduce(&mut self, amount: Self)where
Self: One,
amount
, saturating at zero.§impl SaturatingAdd for Percent
impl SaturatingAdd for Percent
§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.§impl SaturatingSub for Percent
impl SaturatingSub for Percent
§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.§impl Serialize for Percent
impl Serialize for Percent
§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 for Percent
impl Eq for Percent
impl StructuralPartialEq for Percent
Auto Trait Implementations§
impl Freeze for Percent
impl RefUnwindSafe for Percent
impl Send for Percent
impl Sync for Percent
impl Unpin for Percent
impl UnwindSafe for Percent
Blanket Implementations§
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T: ?Sized,
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T: ?Sized,
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impl<T> CheckedConversion for T
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clone_to_uninit
)source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
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default unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
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impl<Q, K> Comparable<K> for Q
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impl<T> Conv for T
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T: Decode,
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T: Decode,
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fn decode_all(input: &mut &[u8]) -> Result<T, Error>
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impl<T> EnsureAdd for Twhere
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§fn ensure_add(self, v: Self) -> Result<Self, ArithmeticError>
fn ensure_add(self, v: Self) -> Result<Self, ArithmeticError>
§impl<T> EnsureAddAssign for T
impl<T> EnsureAddAssign for T
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fn ensure_add_assign(&mut self, v: Self) -> Result<(), ArithmeticError>
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impl<T, S> EnsureFrom<S> for T
§fn ensure_from(other: T) -> Result<Self, ArithmeticError>
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fn ensure_mul(self, v: Self) -> Result<Self, ArithmeticError>
§impl<T> EnsureMulAssign for T
impl<T> EnsureMulAssign for T
§fn ensure_mul_assign(&mut self, v: Self) -> Result<(), ArithmeticError>
fn ensure_mul_assign(&mut self, v: Self) -> Result<(), ArithmeticError>
§impl<T> EnsureSub for Twhere
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impl<T> EnsureSub for Twhere
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§fn ensure_sub(self, v: Self) -> Result<Self, ArithmeticError>
fn ensure_sub(self, v: Self) -> Result<Self, ArithmeticError>
§impl<T> EnsureSubAssign for T
impl<T> EnsureSubAssign for T
§fn ensure_sub_assign(&mut self, v: Self) -> Result<(), ArithmeticError>
fn ensure_sub_assign(&mut self, v: Self) -> Result<(), ArithmeticError>
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.tap_borrow()
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builds.§fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
fn tap_borrow_mut_dbg<B>(self, func: impl FnOnce(&mut B)) -> Self
.tap_borrow_mut()
only in debug builds, and is erased in release
builds.§fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
fn tap_ref_dbg<R>(self, func: impl FnOnce(&R)) -> Self
.tap_ref()
only in debug builds, and is erased in release
builds.§fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
.tap_ref_mut()
only in debug builds, and is erased in release
builds.§fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
.tap_deref()
only in debug builds, and is erased in release
builds.§impl<T> ThresholdOrd<T> for T
impl<T> ThresholdOrd<T> for T
§impl<T> TryConv for T
impl<T> TryConv for T
§impl<S, T> UncheckedInto<T> for Swhere
T: UncheckedFrom<S>,
impl<S, T> UncheckedInto<T> for Swhere
T: UncheckedFrom<S>,
§fn unchecked_into(self) -> T
fn unchecked_into(self) -> T
unchecked_from
.§impl<T, S> UniqueSaturatedFrom<T> for S
impl<T, S> UniqueSaturatedFrom<T> for S
§fn unique_saturated_from(t: T) -> S
fn unique_saturated_from(t: T) -> S
T
into an equivalent instance of Self
.§impl<T, S> UniqueSaturatedInto<T> for S
impl<T, S> UniqueSaturatedInto<T> for S
§fn unique_saturated_into(self) -> T
fn unique_saturated_into(self) -> T
T
.