# [−]Struct sp_core::U256

Little-endian large integer type 256-bit unsigned integer.

## Methods

`impl U256`

[src]

`pub fn full_mul(self, other: U256) -> U512`

[src]

Multiplies two 256-bit integers to produce full 512-bit integer No overflow possible

`impl U256`

`impl U256`

`pub const `**MAX**: U256

**MAX**: U256

Maximum value.

`pub fn from_dec_str(value: &str) -> Result<U256, FromDecStrErr>`

Convert from a decimal string.

`pub fn low_u32(&self) -> u32`

Conversion to u32

`pub fn low_u64(&self) -> u64`

Low word (u64)

`pub fn as_u32(&self) -> u32`

`pub fn as_u64(&self) -> u64`

Conversion to u64 with overflow checking

# Panics

Panics if the number is larger than u64::max_value().

`pub fn as_usize(&self) -> usize`

Conversion to usize with overflow checking

# Panics

Panics if the number is larger than usize::max_value().

`pub fn is_zero(&self) -> bool`

Whether this is zero.

`pub fn bits(&self) -> usize`

Return the least number of bits needed to represent the number

`pub fn bit(&self, index: usize) -> bool`

`pub fn leading_zeros(&self) -> u32`

Returns the number of leading zeros in the binary representation of self.

`pub fn trailing_zeros(&self) -> u32`

Returns the number of leading zeros in the binary representation of self.

`pub fn byte(&self, index: usize) -> u8`

`pub fn to_big_endian(&self, bytes: &mut [u8])`

Write to the slice in big-endian format.

`pub fn to_little_endian(&self, bytes: &mut [u8])`

Write to the slice in little-endian format.

`pub fn exp10(n: usize) -> U256`

`pub fn zero() -> U256`

Zero (additive identity) of this type.

`pub fn one() -> U256`

One (multiplicative identity) of this type.

`pub fn max_value() -> U256`

The maximum value which can be inhabited by this type.

`pub fn div_mod(self, other: U256) -> (U256, U256)`

`pub fn pow(self, expon: U256) -> U256`

Fast exponentiation by squaring https://en.wikipedia.org/wiki/Exponentiation_by_squaring

# Panics

Panics if the result overflows the type.

`pub fn overflowing_pow(self, expon: U256) -> (U256, bool)`

Fast exponentiation by squaring. Returns result and overflow flag.

`pub fn overflowing_add(self, other: U256) -> (U256, bool)`

Add with overflow.

`pub fn saturating_add(self, other: U256) -> U256`

Addition which saturates at the maximum value (Self::max_value()).

`pub fn checked_add(self, other: U256) -> Option<U256>`

Checked addition. Returns `None`

if overflow occurred.

`pub fn overflowing_sub(self, other: U256) -> (U256, bool)`

Subtraction which underflows and returns a flag if it does.

`pub fn saturating_sub(self, other: U256) -> U256`

Subtraction which saturates at zero.

`pub fn checked_sub(self, other: U256) -> Option<U256>`

Checked subtraction. Returns `None`

if overflow occurred.

`pub fn overflowing_mul(self, other: U256) -> (U256, bool)`

Multiply with overflow, returning a flag if it does.

`pub fn saturating_mul(self, other: U256) -> U256`

Multiplication which saturates at the maximum value..

`pub fn checked_mul(self, other: U256) -> Option<U256>`

Checked multiplication. Returns `None`

if overflow occurred.

`pub fn checked_div(self, other: U256) -> Option<U256>`

Checked division. Returns `None`

if `other == 0`

.

`pub fn checked_rem(self, other: U256) -> Option<U256>`

Checked modulus. Returns `None`

if `other == 0`

.

`pub fn overflowing_neg(self) -> (U256, bool)`

Negation with overflow.

`pub fn checked_neg(self) -> Option<U256>`

Checked negation. Returns `None`

unless `self == 0`

.

`pub fn from_big_endian(slice: &[u8]) -> U256`

Converts from big endian representation bytes in memory.

`pub fn from_little_endian(slice: &[u8]) -> U256`

Converts from little endian representation bytes in memory.

## Trait Implementations

`impl<T> Add<T> for U256 where`

T: Into<U256>,

T: Into<U256>,

`impl<'a, T> Add<T> for &'a U256 where`

T: Into<U256>,

T: Into<U256>,

`impl AddAssign<U256> for U256`

`fn add_assign(&mut self, other: U256)`

`impl AsRef<[u64]> for U256`

Get a reference to the underlying little-endian words.

`impl BitAnd<U256> for U256`

`type Output = U256`

The resulting type after applying the `&`

operator.

`fn bitand(self, other: U256) -> U256`

`impl BitOr<U256> for U256`

`type Output = U256`

The resulting type after applying the `|`

operator.

`fn bitor(self, other: U256) -> U256`

`impl BitXor<U256> for U256`

`type Output = U256`

The resulting type after applying the `^`

operator.

`fn bitxor(self, other: U256) -> U256`

`impl Clone for U256`

`fn clone(&self) -> U256`

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

1.0.0[src]

`impl Copy for U256`

`impl Debug for U256`

`impl Decodable for U256`

`fn decode(rlp: &Rlp) -> Result<U256, DecoderError>`

`impl Decode for U256`

`impl Default for U256`

`impl<'de> Deserialize<'de> for U256`

`fn deserialize<D>(`

deserializer: D

) -> Result<U256, <D as Deserializer<'de>>::Error> where

D: Deserializer<'de>,

deserializer: D

) -> Result<U256, <D as Deserializer<'de>>::Error> where

D: Deserializer<'de>,

`impl Display for U256`

`impl<'a, T> Div<T> for &'a U256 where`

T: Into<U256>,

T: Into<U256>,

`impl<T> Div<T> for U256 where`

T: Into<U256>,

T: Into<U256>,

`impl<T> DivAssign<T> for U256 where`

T: Into<U256>,

T: Into<U256>,

`fn div_assign(&mut self, other: T)`

`impl Encodable for U256`

`impl Encode for U256`

`fn using_encoded<R, F>(&self, f: F) -> R where`

F: FnOnce(&[u8]) -> R,

F: FnOnce(&[u8]) -> R,

`fn size_hint(&self) -> usize`

[src]

`fn encode_to<T>(&self, dest: &mut T) where`

T: Output,

[src]

T: Output,

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

[src]

`impl EncodeLike<U256> for U256`

`impl Eq for U256`

`impl<'a> From<&'a [u8; 32]> for U256`

`impl<'a> From<&'a [u8]> for U256`

`impl<'a> From<&'a U256> for U256`

`impl From<&'static str> for U256`

`impl From<[u8; 32]> for U256`

`impl From<U128> for U256`

[src]

`impl From<i128> for U256`

`impl From<i16> for U256`

`impl From<i32> for U256`

`impl From<i64> for U256`

`impl From<i8> for U256`

`impl From<isize> for U256`

`impl From<u128> for U256`

`impl From<u16> for U256`

`impl From<u32> for U256`

`impl From<u64> for U256`

`impl From<u8> for U256`

`impl From<usize> for U256`

`impl FromStr for U256`

`type Err = FromHexError`

The associated error which can be returned from parsing.

`fn from_str(value: &str) -> Result<U256, <U256 as FromStr>::Err>`

`impl Hash for U256`

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

__H: Hasher,

__H: Hasher,

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

H: Hasher,

1.3.0[src]

H: Hasher,

`impl LowerHex for U256`

`impl MallocSizeOf for U256`

[src]

`fn size_of(&self, &mut MallocSizeOfOps) -> usize`

[src]

`impl<'a> Mul<&'a U256> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a U256) -> U256`

`impl<'a> Mul<&'a U256> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a U256) -> U256`

`impl<'a> Mul<&'a i16> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a i16) -> U256`

`impl<'a> Mul<&'a i16> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a i16) -> U256`

`impl<'a> Mul<&'a i32> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a i32) -> U256`

`impl<'a> Mul<&'a i32> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a i32) -> U256`

`impl<'a> Mul<&'a i64> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a i64) -> U256`

`impl<'a> Mul<&'a i64> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a i64) -> U256`

`impl<'a> Mul<&'a i8> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a i8) -> U256`

`impl<'a> Mul<&'a i8> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a i8) -> U256`

`impl<'a> Mul<&'a isize> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a isize) -> U256`

`impl<'a> Mul<&'a isize> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a isize) -> U256`

`impl<'a> Mul<&'a u16> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a u16) -> U256`

`impl<'a> Mul<&'a u16> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a u16) -> U256`

`impl<'a> Mul<&'a u32> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a u32) -> U256`

`impl<'a> Mul<&'a u32> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a u32) -> U256`

`impl<'a> Mul<&'a u64> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a u64) -> U256`

`impl<'a> Mul<&'a u64> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a u64) -> U256`

`impl<'a> Mul<&'a u8> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a u8) -> U256`

`impl<'a> Mul<&'a u8> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a u8) -> U256`

`impl<'a> Mul<&'a usize> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a usize) -> U256`

`impl<'a> Mul<&'a usize> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: &'a usize) -> U256`

`impl Mul<U256> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: U256) -> U256`

`impl<'a> Mul<U256> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: U256) -> U256`

`impl<'a> Mul<i16> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: i16) -> U256`

`impl Mul<i16> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: i16) -> U256`

`impl<'a> Mul<i32> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: i32) -> U256`

`impl Mul<i32> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: i32) -> U256`

`impl Mul<i64> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: i64) -> U256`

`impl<'a> Mul<i64> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: i64) -> U256`

`impl<'a> Mul<i8> for &'a U256`

`impl Mul<i8> for U256`

`impl Mul<isize> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: isize) -> U256`

`impl<'a> Mul<isize> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: isize) -> U256`

`impl Mul<u16> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: u16) -> U256`

`impl<'a> Mul<u16> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: u16) -> U256`

`impl Mul<u32> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: u32) -> U256`

`impl<'a> Mul<u32> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: u32) -> U256`

`impl Mul<u64> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: u64) -> U256`

`impl<'a> Mul<u64> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: u64) -> U256`

`impl<'a> Mul<u8> for &'a U256`

`impl Mul<u8> for U256`

`impl<'a> Mul<usize> for &'a U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: usize) -> U256`

`impl Mul<usize> for U256`

`type Output = U256`

The resulting type after applying the `*`

operator.

`fn mul(self, other: usize) -> U256`

`impl MulAssign<U256> for U256`

`fn mul_assign(&mut self, other: U256)`

`impl MulAssign<i16> for U256`

`fn mul_assign(&mut self, other: i16)`

`impl MulAssign<i32> for U256`

`fn mul_assign(&mut self, other: i32)`

`impl MulAssign<i64> for U256`

`fn mul_assign(&mut self, other: i64)`

`impl MulAssign<i8> for U256`

`fn mul_assign(&mut self, other: i8)`

`impl MulAssign<isize> for U256`

`fn mul_assign(&mut self, other: isize)`

`impl MulAssign<u16> for U256`

`fn mul_assign(&mut self, other: u16)`

`impl MulAssign<u32> for U256`

`fn mul_assign(&mut self, other: u32)`

`impl MulAssign<u64> for U256`

`fn mul_assign(&mut self, other: u64)`

`impl MulAssign<u8> for U256`

`fn mul_assign(&mut self, other: u8)`

`impl MulAssign<usize> for U256`

`fn mul_assign(&mut self, other: usize)`

`impl Not for U256`

`impl Ord for U256`

`fn cmp(&self, other: &U256) -> Ordering`

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

1.21.0[src]

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

1.21.0[src]

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

[src]

`impl PartialEq<U256> for U256`

`impl PartialOrd<U256> for U256`

`fn partial_cmp(&self, other: &U256) -> Option<Ordering>`

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

1.0.0[src]

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

1.0.0[src]

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

1.0.0[src]

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

1.0.0[src]

`impl<T> Rem<T> for U256 where`

T: Into<U256> + Copy,

T: Into<U256> + Copy,

`impl<'a, T> Rem<T> for &'a U256 where`

T: Into<U256> + Copy,

T: Into<U256> + Copy,

`impl<T> RemAssign<T> for U256 where`

T: Into<U256> + Copy,

T: Into<U256> + Copy,

`fn rem_assign(&mut self, other: T)`

`impl Serialize for U256`

`fn serialize<S>(`

&self,

serializer: S

) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error> where

S: Serializer,

&self,

serializer: S

) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error> where

S: Serializer,

`impl<'a, T> Shl<T> for &'a U256 where`

T: Into<U256>,

T: Into<U256>,

`impl<T> Shl<T> for U256 where`

T: Into<U256>,

T: Into<U256>,

`impl<T> ShlAssign<T> for U256 where`

T: Into<U256>,

T: Into<U256>,

`fn shl_assign(&mut self, shift: T)`

`impl<T> Shr<T> for U256 where`

T: Into<U256>,

T: Into<U256>,

`impl<'a, T> Shr<T> for &'a U256 where`

T: Into<U256>,

T: Into<U256>,

`impl<T> ShrAssign<T> for U256 where`

T: Into<U256>,

T: Into<U256>,

`fn shr_assign(&mut self, shift: T)`

`impl StructuralEq for U256`

`impl StructuralPartialEq for U256`

`impl<T> Sub<T> for U256 where`

T: Into<U256>,

T: Into<U256>,

`impl<'a, T> Sub<T> for &'a U256 where`

T: Into<U256>,

T: Into<U256>,

`impl SubAssign<U256> for U256`

`fn sub_assign(&mut self, other: U256)`

`impl<'a> TryFrom<&'a U512> for U256`

[src]

`type Error = Error`

The type returned in the event of a conversion error.

`fn try_from(value: &'a U512) -> Result<U256, Error>`

[src]

`impl TryFrom<U512> for U256`

[src]

## Auto Trait Implementations

`impl RefUnwindSafe for U256`

`impl Send for U256`

`impl Sync for U256`

`impl Unpin for U256`

`impl UnwindSafe for U256`

## Blanket Implementations

`impl<T> Any for T where`

T: 'static + ?Sized,

[src]

T: 'static + ?Sized,

`impl<T> Borrow<T> for T where`

T: ?Sized,

[src]

T: ?Sized,

`impl<T> BorrowMut<T> for T where`

T: ?Sized,

[src]

T: ?Sized,

`fn borrow_mut(&mut self) -> &mut T`

[src]

`impl<T> Clear for T where`

T: InitializableFromZeroed + ?Sized,

[src]

T: InitializableFromZeroed + ?Sized,

`impl<S> Codec for S where`

S: Encode + Decode,

[src]

S: Encode + Decode,

`impl<T, X> Decode for X where`

T: Decode + Into<X>,

X: WrapperTypeDecode<Wrapped = T>,

[src]

T: Decode + Into<X>,

X: WrapperTypeDecode<Wrapped = T>,

`impl<T> DecodeAll for T where`

T: Decode,

[src]

T: Decode,

`impl<T> DeserializeOwned for T where`

T: Deserialize<'de>,

[src]

T: Deserialize<'de>,

`impl<T, X> Encode for X where`

T: Encode + ?Sized,

X: WrapperTypeEncode<Target = T>,

[src]

T: Encode + ?Sized,

X: WrapperTypeEncode<Target = T>,

`fn size_hint(&self) -> usize`

[src]

`fn using_encoded<R, F>(&self, f: F) -> R where`

F: FnOnce(&[u8]) -> R,

[src]

F: FnOnce(&[u8]) -> R,

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

[src]

`fn encode_to<W>(&self, dest: &mut W) where`

W: Output,

[src]

W: Output,

`impl<'_, '_, T> EncodeLike<&'_ &'_ T> for T where`

T: Encode,

[src]

T: Encode,

`impl<'_, T> EncodeLike<&'_ T> for T where`

T: Encode,

[src]

T: Encode,

`impl<'_, T> EncodeLike<&'_ mut T> for T where`

T: Encode,

[src]

T: Encode,

`impl<T> EncodeLike<Arc<T>> for T where`

T: Encode,

[src]

T: Encode,

`impl<T> EncodeLike<Box<T>> for T where`

T: Encode,

[src]

T: Encode,

`impl<'a, T> EncodeLike<Cow<'a, T>> for T where`

T: Encode + ToOwned,

[src]

T: Encode + ToOwned,

`impl<T> EncodeLike<Rc<T>> for T where`

T: Encode,

[src]

T: Encode,

`impl<T> From<T> for T`

[src]

`impl<S> FullCodec for S where`

S: Decode + FullEncode,

[src]

S: Decode + FullEncode,

`impl<S> FullEncode for S where`

S: Encode + EncodeLike<S>,

[src]

S: Encode + EncodeLike<S>,

`impl<T> InitializableFromZeroed for T where`

T: Default,

[src]

T: Default,

`unsafe fn initialize(place: *mut T)`

[src]

`impl<T, U> Into<U> for T where`

U: From<T>,

[src]

U: From<T>,

`impl<T, Outer> IsWrappedBy<Outer> for T where`

Outer: AsRef<T> + AsMut<T> + From<T>,

T: From<Outer>,

[src]

Outer: AsRef<T> + AsMut<T> + From<T>,

T: From<Outer>,

`fn from_ref(&Outer) -> &T`

[src]

Get a reference to the inner from the outer.

`fn from_mut(&mut Outer) -> &mut T`

[src]

Get a mutable reference to the inner from the outer.

`impl<T> KeyedVec for T where`

T: Codec,

[src]

T: Codec,

`impl<T> MallocSizeOfExt for T where`

T: MallocSizeOf,

[src]

T: MallocSizeOf,

`fn malloc_size_of(&self) -> usize`

[src]

`impl<T> MaybeDebug for T where`

T: Debug,

[src]

T: Debug,

`impl<T> MaybeRefUnwindSafe for T where`

T: RefUnwindSafe,

[src]

T: RefUnwindSafe,

`impl<T, Rhs> NumAssignOps<Rhs> for T where`

T: AddAssign<Rhs> + SubAssign<Rhs> + MulAssign<Rhs> + DivAssign<Rhs> + RemAssign<Rhs>,

[src]

T: AddAssign<Rhs> + SubAssign<Rhs> + MulAssign<Rhs> + DivAssign<Rhs> + RemAssign<Rhs>,

`impl<T, Rhs, Output> NumOps<Rhs, Output> for T where`

T: Sub<Rhs, Output = Output> + Mul<Rhs, Output = Output> + Div<Rhs, Output = Output> + Add<Rhs, Output = Output> + Rem<Rhs, Output = Output>,

[src]

T: Sub<Rhs, Output = Output> + Mul<Rhs, Output = Output> + Div<Rhs, Output = Output> + Add<Rhs, Output = Output> + Rem<Rhs, Output = Output>,

`impl<T, Base> RefNum<Base> for T where`

T: NumOps<Base, Base> + NumOps<&'r Base, Base>,

[src]

T: NumOps<Base, Base> + NumOps<&'r Base, Base>,

`impl<T> Same<T> for T`

[src]

`type Output = T`

Should always be `Self`

`impl<T> ToOwned for T where`

T: Clone,

[src]

T: Clone,

`type Owned = T`

The resulting type after obtaining ownership.

`fn to_owned(&self) -> T`

[src]

`fn clone_into(&self, target: &mut T)`

[src]

`impl<T> ToString for T where`

T: Display + ?Sized,

[src]

T: Display + ?Sized,

`impl<T, U> TryFrom<U> for T where`

U: Into<T>,

[src]

U: Into<T>,

`type Error = Infallible`

The type returned in the event of a conversion error.

`fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>`

[src]

`impl<T, U> TryInto<U> for T where`

U: TryFrom<T>,

[src]

U: TryFrom<T>,

`type Error = <U as TryFrom<T>>::Error`

The type returned in the event of a conversion error.

`fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>`

[src]

`impl<S, T> UncheckedInto<T> for S where`

T: UncheckedFrom<S>,

[src]

T: UncheckedFrom<S>,

`fn unchecked_into(Self) -> T`

[src]

`impl<V, T> VZip<V> for T where`

V: MultiLane<T>,

[src]

V: MultiLane<T>,