reth_evm::revm::primitives::alloy_primitives

Struct Uint

pub struct Uint<const BITS: usize, const LIMBS: usize> { /* private fields */ }

Expand description

The ring of numbers modulo $2^{\mathtt{BITS}}$.

Uint implements nearly all traits and methods from the std unsigned integer types, including most nightly only ones.

§Notable differences from `std` uint types.

The operators +, -, *, etc. using wrapping math by default. The std operators panic on overflow in debug, and are undefined in release, see reference.
The Uint::checked_shl, Uint::overflowing_shl, etc return overflow when non-zero bits are shifted out. In std they return overflow when the shift amount is greater than the bit size.
Some methods like u64::div_euclid and u64::rem_euclid are left out because they are meaningless or redundant for unsigned integers. Std has them for compatibility with their signed integers.
Many functions that are const in std are not in Uint.
Uint::to_le_bytes and Uint::to_be_bytes require the output size to be provided as a const-generic argument. They will runtime panic if the provided size is incorrect.
Uint::widening_mul takes as argument an Uint of arbitrary size and returns a result that is sized to fit the product without overflow (i.e. the sum of the bit sizes of self and the argument). The std version requires same-sized arguments and returns a pair of lower and higher bits.

Implementations§

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub fn abs_diff(self, other: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

Computes the absolute difference between self and other.

Returns $\left\vert \mathtt{self} - \mathtt{other} \right\vert$.

pub const fn checked_add( self, rhs: Uint<BITS, LIMBS>, ) -> Option<Uint<BITS, LIMBS>>

Computes self + rhs, returning None if overflow occurred.

pub const fn checked_neg(self) -> Option<Uint<BITS, LIMBS>>

Computes -self, returning None unless self == 0.

pub const fn checked_sub( self, rhs: Uint<BITS, LIMBS>, ) -> Option<Uint<BITS, LIMBS>>

Computes self - rhs, returning None if overflow occurred.

pub const fn overflowing_add( self, rhs: Uint<BITS, LIMBS>, ) -> (Uint<BITS, LIMBS>, bool)

Calculates $\mod{\mathtt{self} + \mathtt{rhs}}_{2^{BITS}}$.

Returns a tuple of the addition along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would have occurred then the wrapped value is returned.

pub const fn overflowing_neg(self) -> (Uint<BITS, LIMBS>, bool)

Calculates $\mod{-\mathtt{self}}_{2^{BITS}}$.

Returns !self + 1 using wrapping operations to return the value that represents the negation of this unsigned value. Note that for positive unsigned values overflow always occurs, but negating 0 does not overflow.

pub const fn overflowing_sub( self, rhs: Uint<BITS, LIMBS>, ) -> (Uint<BITS, LIMBS>, bool)

Calculates $\mod{\mathtt{self} - \mathtt{rhs}}_{2^{BITS}}$.

Returns a tuple of the subtraction along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would have occurred then the wrapped value is returned.

pub const fn saturating_add(self, rhs: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

Computes self + rhs, saturating at the numeric bounds instead of overflowing.

pub const fn saturating_sub(self, rhs: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

Computes self - rhs, saturating at the numeric bounds instead of overflowing

pub const fn wrapping_add(self, rhs: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

Computes self + rhs, wrapping around at the boundary of the type.

pub const fn wrapping_neg(self) -> Uint<BITS, LIMBS>

Computes -self, wrapping around at the boundary of the type.

pub const fn wrapping_sub(self, rhs: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

Computes self - rhs, wrapping around at the boundary of the type.

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub fn to_base_le(&self, base: u64) -> impl Iterator<Item = u64>

Returns an iterator over the base base digits of the number in little-endian order.

Pro tip: instead of setting base = 10, set it to the highest power of 10 that still fits u64. This way much fewer iterations are required to extract all the digits.

§Panics

Panics if the base is less than 2.

pub fn to_base_be(&self, base: u64) -> impl Iterator<Item = u64>

Returns an iterator over the base base digits of the number in big-endian order.

Pro tip: instead of setting base = 10, set it to the highest power of 10 that still fits u64. This way much fewer iterations are required to extract all the digits.

§Panics

Panics if the base is less than 2.

pub fn from_base_le( base: u64, digits: I, ) -> Result<Uint<BITS, LIMBS>, BaseConvertError>
where I: IntoIterator<Item = u64>,

Constructs the Uint from digits in the base base in little-endian.

§Errors

BaseConvertError::InvalidBase if the base is less than 2.
BaseConvertError::InvalidDigit if a digit is out of range.
BaseConvertError::Overflow if the number is too large to fit.

pub fn from_base_be( base: u64, digits: I, ) -> Result<Uint<BITS, LIMBS>, BaseConvertError>
where I: IntoIterator<Item = u64>,

Constructs the Uint from digits in the base base in big-endian.

§Errors

BaseConvertError::InvalidBase if the base is less than 2.
BaseConvertError::InvalidDigit if a digit is out of range.
BaseConvertError::Overflow if the number is too large to fit.

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

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

Returns whether a specific bit is set.

Returns false if index exceeds the bit width of the number.

pub fn set_bit(&mut self, index: usize, value: bool)

Sets a specific bit to a value.

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

Returns a specific byte. The byte at index 0 is the least significant byte (little endian).

§Panics

Panics if index is greater than or equal to the byte width of the number.

§Examples

let x = uint!(0x1234567890_U64);
let bytes = [
    x.byte(0), // 0x90
    x.byte(1), // 0x78
    x.byte(2), // 0x56
    x.byte(3), // 0x34
    x.byte(4), // 0x12
    x.byte(5), // 0x00
    x.byte(6), // 0x00
    x.byte(7), // 0x00
];
assert_eq!(bytes, x.to_le_bytes());

Panics if out of range.

let x = uint!(0x1234567890_U64);
let _ = x.byte(8);

pub const fn checked_byte(&self, index: usize) -> Option<u8>

Returns a specific byte, or None if index is out of range. The byte at index 0 is the least significant byte (little endian).

§Examples

let x = uint!(0x1234567890_U64);
assert_eq!(x.checked_byte(0), Some(0x90));
assert_eq!(x.checked_byte(7), Some(0x00));
// Out of range
assert_eq!(x.checked_byte(8), None);

pub fn reverse_bits(self) -> Uint<BITS, LIMBS>

Reverses the order of bits in the integer. The least significant bit becomes the most significant bit, second least-significant bit becomes second most-significant bit, etc.

pub const fn not(self) -> Uint<BITS, LIMBS>

Inverts all the bits in the integer.

pub const fn leading_zeros(&self) -> usize

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

pub const fn leading_ones(&self) -> usize

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

pub fn trailing_zeros(&self) -> usize

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

pub fn trailing_ones(&self) -> usize

Returns the number of trailing ones in the binary representation of self.

pub const fn count_ones(&self) -> usize

Returns the number of ones in the binary representation of self.

pub const fn count_zeros(&self) -> usize

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

pub const fn bit_len(&self) -> usize

Returns the dynamic length of this number in bits, ignoring leading zeros.

For the maximum length of the type, use Uint::BITS.

pub const fn byte_len(&self) -> usize

Returns the dynamic length of this number in bytes, ignoring leading zeros.

For the maximum length of the type, use Uint::BYTES.

pub fn most_significant_bits(&self) -> (u64, usize)

Returns the most significant 64 bits of the number and the exponent.

Given return value $(\mathtt{bits}, \mathtt{exponent})$, the self can be approximated as

$$ \mathtt{self} ≈ \mathtt{bits} ⋅ 2^\mathtt{exponent} $$

If self is $<≥> 2^{63}$, then exponent will be zero and bits will have leading zeros.

pub const fn checked_shl(self, rhs: usize) -> Option<Uint<BITS, LIMBS>>

Checked left shift by rhs bits.

Returns $\mathtt{self} ⋅ 2^{\mathtt{rhs}}$ or None if the result would $≥ 2^{\mathtt{BITS}}$. That is, it returns None if the bits shifted out would be non-zero.

Note: This differs from u64::checked_shl which returns None if the shift is larger than BITS (which is IMHO not very useful).

pub const fn saturating_shl(self, rhs: usize) -> Uint<BITS, LIMBS>

Saturating left shift by rhs bits.

Returns $\mathtt{self} ⋅ 2^{\mathtt{rhs}}$ or Uint::MAX if the result would $≥ 2^{\mathtt{BITS}}$. That is, it returns Uint::MAX if the bits shifted out would be non-zero.

pub const fn overflowing_shl(self, rhs: usize) -> (Uint<BITS, LIMBS>, bool)

Left shift by rhs bits with overflow detection.

Returns $\mod{\mathtt{value} ⋅ 2^{\mathtt{rhs}}}_{2^{\mathtt{BITS}}}$. If the product is $≥ 2^{\mathtt{BITS}}$ it returns true. That is, it returns true if the bits shifted out are non-zero.

Note: This differs from u64::overflowing_shl which returns true if the shift is larger than BITS (which is IMHO not very useful).

pub const fn wrapping_shl(self, rhs: usize) -> Uint<BITS, LIMBS>

Left shift by rhs bits.

Returns $\mod{\mathtt{value} ⋅ 2^{\mathtt{rhs}}}_{2^{\mathtt{BITS}}}$.

Note: This differs from u64::wrapping_shl which first reduces rhs by BITS (which is IMHO not very useful).

pub const fn checked_shr(self, rhs: usize) -> Option<Uint<BITS, LIMBS>>

Checked right shift by rhs bits.

$$ \frac{\mathtt{self}}{2^{\mathtt{rhs}}} $$

Returns the above or None if the division is not exact. This is the same as

Note: This differs from u64::checked_shr which returns None if the shift is larger than BITS (which is IMHO not very useful).

pub const fn overflowing_shr(self, rhs: usize) -> (Uint<BITS, LIMBS>, bool)

Right shift by rhs bits with underflow detection.

$$ \floor{\frac{\mathtt{self}}{2^{\mathtt{rhs}}}} $$

Returns the above and false if the division was exact, and true if it was rounded down. This is the same as non-zero bits being shifted out.

Note: This differs from u64::overflowing_shr which returns true if the shift is larger than BITS (which is IMHO not very useful).

pub const fn wrapping_shr(self, rhs: usize) -> Uint<BITS, LIMBS>

Right shift by rhs bits.

$$ \mathtt{wrapping\_shr}(\mathtt{self}, \mathtt{rhs}) = \floor{\frac{\mathtt{self}}{2^{\mathtt{rhs}}}} $$

Note: This differs from u64::wrapping_shr which first reduces rhs by BITS (which is IMHO not very useful).

pub const fn arithmetic_shr(self, rhs: usize) -> Uint<BITS, LIMBS>

Arithmetic shift right by rhs bits.

pub const fn rotate_left(self, rhs: usize) -> Uint<BITS, LIMBS>

Shifts the bits to the left by a specified amount, rhs, wrapping the truncated bits to the end of the resulting integer.

pub const BYTES: usize

The size of this integer type in bytes. Note that some bits may be forced zero if BITS is not cleanly divisible by eight.

pub const fn as_le_slice(&self) -> &[u8] ⓘ

Access the underlying store as a little-endian slice of bytes.

Only available on little-endian targets.

If BITS does not evenly divide 8, it is padded with zero bits in the most significant position.

pub unsafe fn as_le_slice_mut(&mut self) -> &mut [u8] ⓘ

Access the underlying store as a mutable little-endian slice of bytes.

Only available on litte-endian targets.

§Safety

If BITS does not evenly divide 8, it is padded with zero bits in the most significant position. Setting those bits puts the Uint in an invalid state.

pub fn as_le_bytes(&self) -> Cow<'_, [u8]>

Access the underlying store as a little-endian bytes.

Uses an optimized implementation on little-endian targets.

pub fn as_le_bytes_trimmed(&self) -> Cow<'_, [u8]>

Access the underlying store as a little-endian bytes with trailing zeros removed.

Uses an optimized implementation on little-endian targets.

pub const fn to_le_bytes<const BYTES: usize>(&self) -> [u8; BYTES]

Converts the Uint to a little-endian byte array of size exactly Self::BYTES.

§Panics

Panics if the generic parameter BYTES is not exactly Self::BYTES. Ideally this would be a compile time error, but this is blocked by Rust issue #60551.

pub fn to_le_bytes_vec(&self) -> Vec<u8> ⓘ

Converts the Uint to a little-endian byte vector of size exactly Self::BYTES.

This method is useful when Self::to_le_bytes can not be used because byte size is not known compile time.

pub fn to_le_bytes_trimmed_vec(&self) -> Vec<u8> ⓘ

Converts the Uint to a little-endian byte vector with trailing zeros bytes removed.

pub const fn to_be_bytes<const BYTES: usize>(&self) -> [u8; BYTES]

Converts the Uint to a big-endian byte array of size exactly Self::BYTES.

§Panics

Panics if the generic parameter BYTES is not exactly Self::BYTES. Ideally this would be a compile time error, but this is blocked by Rust issue #60551.

pub fn to_be_bytes_vec(&self) -> Vec<u8> ⓘ

Converts the Uint to a big-endian byte vector of size exactly Self::BYTES.

This method is useful when Self::to_be_bytes can not be used because byte size is not known compile time.

pub fn to_be_bytes_trimmed_vec(&self) -> Vec<u8> ⓘ

Converts the Uint to a big-endian byte vector with leading zeros bytes removed.

pub const fn from_be_bytes<const BYTES: usize>( bytes: [u8; BYTES], ) -> Uint<BITS, LIMBS>

Converts a big-endian byte array of size exactly Self::BYTES to Uint.

§Panics

Panics if the generic parameter BYTES is not exactly Self::BYTES. Ideally this would be a compile time error, but this is blocked by Rust issue #60551.

Panics if the value is too large for the bit-size of the Uint.

pub const fn from_be_slice(bytes: &[u8]) -> Uint<BITS, LIMBS>

Creates a new integer from a big endian slice of bytes.

The slice is interpreted as a big endian number, and must be at most Self::BYTES long.

§Panics

Panics if the value is larger than fits the Uint.

pub const fn try_from_be_slice(bytes: &[u8]) -> Option<Uint<BITS, LIMBS>>

Creates a new integer from a big endian slice of bytes.

The slice is interpreted as a big endian number, and must be at most Self::BYTES long.

Returns None if the value is larger than fits the Uint.

pub const fn from_le_bytes<const BYTES: usize>( bytes: [u8; BYTES], ) -> Uint<BITS, LIMBS>

Converts a little-endian byte array of size exactly Self::BYTES to Uint.

§Panics

Panics if the generic parameter BYTES is not exactly Self::BYTES. Ideally this would be a compile time error, but this is blocked by Rust issue #60551.

Panics if the value is too large for the bit-size of the Uint.

pub const fn from_le_slice(bytes: &[u8]) -> Uint<BITS, LIMBS>

Creates a new integer from a little endian slice of bytes.

The slice is interpreted as a little endian number, and must be at most Self::BYTES long.

§Panics

Panics if the value is larger than fits the Uint.

pub const fn try_from_le_slice(bytes: &[u8]) -> Option<Uint<BITS, LIMBS>>

Creates a new integer from a little endian slice of bytes.

The slice is interpreted as a little endian number, and must be at most Self::BYTES long.

Returns None if the value is larger than fits the Uint.

pub fn copy_le_bytes_to(&self, buf: &mut [u8]) -> usize

Writes the little-endian representation of the Uint to the given buffer. The buffer must be large enough to hold Self::BYTES bytes.

§Panics

Panics if the buffer is not large enough to hold Self::BYTES bytes.

§Returns

The number of bytes written to the buffer (always equal to Self::BYTES, but often useful to make explicit for encoders).

pub fn checked_copy_le_bytes_to(&self, buf: &mut [u8]) -> Option<usize>

Writes the little-endian representation of the Uint to the given buffer. The buffer must be large enough to hold Self::BYTES bytes.

§Returns

None, if the buffer is not large enough to hold Self::BYTES bytes, and does not modify the buffer.

Some with the number of bytes written to the buffer (always equal to Self::BYTES, but often useful to make explicit for encoders).

pub fn copy_be_bytes_to(&self, buf: &mut [u8]) -> usize

Writes the big-endian representation of the Uint to the given buffer. The buffer must be large enough to hold Self::BYTES bytes.

§Panics

Panics if the buffer is not large enough to hold Self::BYTES bytes.

§Returns

The number of bytes written to the buffer (always equal to Self::BYTES, but often useful to make explicit for encoders).

pub fn checked_copy_be_bytes_to(&self, buf: &mut [u8]) -> Option<usize>

Writes the big-endian representation of the Uint to the given buffer. The buffer must be large enough to hold Self::BYTES bytes.

§Returns

None, if the buffer is not large enough to hold Self::BYTES bytes, and does not modify the buffer.

Some with the number of bytes written to the buffer (always equal to Self::BYTES, but often useful to make explicit for encoders).

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub fn is_zero(&self) -> bool

Returns true if the value is zero.

pub const fn const_is_zero(&self) -> bool

Returns true if the value is zero.

Note that this currently might perform worse than is_zero.

pub const fn const_eq(&self, other: &Uint<BITS, LIMBS>) -> bool

Returns true if self equals other.

Note that this currently might perform worse than the derived PartialEq (== operator).

§

Computes self % rhs.

§Panics

Panics if rhs == 0.

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub fn from<T>(value: T) -> Uint<BITS, LIMBS>
where Uint<BITS, LIMBS>: UintTryFrom<T>,

Construct a new Uint from the value.

§Panics

Panics if the conversion fails, for example if the value is too large for the bit-size of the Uint. The panic will be attributed to the call site.

§Examples

assert_eq!(U8::from(142_u16), 142_U8);
assert_eq!(U64::from(0x7014b4c2d1f2_U256), 0x7014b4c2d1f2_U64);
assert_eq!(U64::from(3.145), 3_U64);

pub fn saturating_from<T>(value: T) -> Uint<BITS, LIMBS>
where Uint<BITS, LIMBS>: UintTryFrom<T>,

Construct a new Uint from the value saturating the value to the minimum or maximum value of the Uint.

If the value is not a number (like f64::NAN), then the result is set zero.

§Examples

assert_eq!(U8::saturating_from(300_u16), 255_U8);
assert_eq!(U8::saturating_from(-10_i16), 0_U8);
assert_eq!(U32::saturating_from(0x7014b4c2d1f2_U256), U32::MAX);

pub fn wrapping_from<T>(value: T) -> Uint<BITS, LIMBS>
where Uint<BITS, LIMBS>: UintTryFrom<T>,

Construct a new Uint from the value saturating the value to the minimum or maximum value of the Uint.

If the value is not a number (like f64::NAN), then the result is set zero.

§Examples

assert_eq!(U8::wrapping_from(300_u16), 44_U8);
assert_eq!(U8::wrapping_from(-10_i16), 246_U8);
assert_eq!(U32::wrapping_from(0x7014b4c2d1f2_U256), 0xb4c2d1f2_U32);

pub fn to<T>(&self) -> T
where Uint<BITS, LIMBS>: UintTryTo<T>, T: Debug,

§Panics

Panics if the conversion fails, for example if the value is too large for the bit-size of the target type.

§Examples

assert_eq!(300_U12.to::<i16>(), 300_i16);
assert_eq!(300_U12.to::<U256>(), 300_U256);

pub fn wrapping_to<T>(&self) -> T
where Uint<BITS, LIMBS>: UintTryTo<T>,

§Examples

assert_eq!(300_U12.wrapping_to::<i8>(), 44_i8);
assert_eq!(255_U32.wrapping_to::<i8>(), -1_i8);
assert_eq!(0x1337cafec0d3_U256.wrapping_to::<U32>(), 0xcafec0d3_U32);

pub fn saturating_to<T>(&self) -> T
where Uint<BITS, LIMBS>: UintTryTo<T>,

§Examples

assert_eq!(300_U12.saturating_to::<i16>(), 300_i16);
assert_eq!(255_U32.saturating_to::<i8>(), 127);
assert_eq!(0x1337cafec0d3_U256.saturating_to::<U32>(), U32::MAX);

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub fn gcd(self, other: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

Compute the greatest common divisor of two Uints.

§Examples

assert_eq!(0_U128.gcd(0_U128), 0_U128);

pub fn lcm(self, other: Uint<BITS, LIMBS>) -> Option<Uint<BITS, LIMBS>>

Compute the least common multiple of two Uints or None if the result would be too large.

pub fn gcd_extended( self, other: Uint<BITS, LIMBS>, ) -> (Uint<BITS, LIMBS>, Uint<BITS, LIMBS>, Uint<BITS, LIMBS>, bool)

⚠️ Compute the greatest common divisor and the Bézout coefficients.

Warning. This is API is unstable and may change in a minor release.

Returns $(\mathtt{gcd}, \mathtt{x}, \mathtt{y}, \mathtt{sign})$ such that

$$ \gcd(\mathtt{self}, \mathtt{other}) = \mathtt{gcd} = \begin{cases} \mathtt{self} · \mathtt{x} - \mathtt{other} . \mathtt{y} & \mathtt{sign} \\ \mathtt{other} · \mathtt{y} - \mathtt{self} · \mathtt{x} & ¬\mathtt{sign} \end{cases} $$

Note that the intermediate products may overflow, even though the result after subtraction will fit in the bit size of the Uint.

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub fn checked_log(self, base: Uint<BITS, LIMBS>) -> Option<usize>

Returns the logarithm of the number, rounded down.

Returns None if the base is less than two, or this number is zero.

pub fn checked_log10(self) -> Option<usize>

Returns the base 10 logarithm of the number, rounded down.

Double precision logarithm.

pub fn approx_log2(self) -> f64

Double precision binary logarithm.

§Examples

assert_eq!(0_U64.approx_log2(), f64::NEG_INFINITY);
assert_eq!(1_U64.approx_log2(), 0.0);
assert_eq!(2_U64.approx_log2(), 1.0);
assert_eq!(U64::MAX.approx_log2(), 64.0);

pub fn approx_log10(self) -> f64

Double precision decimal logarithm.

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub fn reduce_mod(self, modulus: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

⚠️ Compute $\mod{\mathtt{self}}_{\mathtt{modulus}}$.

Warning. This function is not part of the stable API.

Returns zero if the modulus is zero.

pub fn add_mod( self, rhs: Uint<BITS, LIMBS>, modulus: Uint<BITS, LIMBS>, ) -> Uint<BITS, LIMBS>

Compute $\mod{\mathtt{self} + \mathtt{rhs}}_{\mathtt{modulus}}$.

Returns zero if the modulus is zero.

pub fn mul_mod( self, rhs: Uint<BITS, LIMBS>, modulus: Uint<BITS, LIMBS>, ) -> Uint<BITS, LIMBS>

Compute $\mod{\mathtt{self} ⋅ \mathtt{rhs}}_{\mathtt{modulus}}$.

Returns zero if the modulus is zero.

See mul_redc for a faster variant at the cost of some pre-computation.

pub fn pow_mod( self, exp: Uint<BITS, LIMBS>, modulus: Uint<BITS, LIMBS>, ) -> Uint<BITS, LIMBS>

Compute $\mod{\mathtt{self}^{\mathtt{rhs}}}_{\mathtt{modulus}}$.

Returns zero if the modulus is zero.

pub fn inv_mod(self, modulus: Uint<BITS, LIMBS>) -> Option<Uint<BITS, LIMBS>>

Compute $\mod{\mathtt{self}^{-1}}_{\mathtt{modulus}}$.

Returns None if the inverse does not exist.

pub fn mul_redc( self, other: Uint<BITS, LIMBS>, modulus: Uint<BITS, LIMBS>, inv: u64, ) -> Uint<BITS, LIMBS>

Montgomery multiplication.

Requires self and other to be less than modulus.

Computes

$$ \mod{\frac{\mathtt{self} ⋅ \mathtt{other}}{ 2^{64 · \mathtt{LIMBS}}}}_{\mathtt{modulus}} $$

This is useful because it can be computed notably faster than mul_mod. Many computations can be done by pre-multiplying values with $R = 2^{64 · \mathtt{LIMBS}}$ and then using mul_redc instead of mul_mod.

For this algorithm to work, it needs an extra parameter inv which must be set to

$$ \mathtt{inv} = \mod{\frac{-1}{\mathtt{modulus}} }_{2^{64}} $$

The inv value only exists for odd values of modulus. It can be computed using inv_ring from U64.

let inv = U64::wrapping_from(modulus).inv_ring().unwrap().wrapping_neg().to();
let prod = 5_U256.mul_redc(6_U256, modulus, inv);

§Panics

Panics if inv is not correct in debug mode.

pub fn square_redc( self, modulus: Uint<BITS, LIMBS>, inv: u64, ) -> Uint<BITS, LIMBS>

Montgomery squaring.

See Self::mul_redc.

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub fn checked_mul(self, rhs: Uint<BITS, LIMBS>) -> Option<Uint<BITS, LIMBS>>

Computes self * rhs, returning None if overflow occurred.

pub fn overflowing_mul( self, rhs: Uint<BITS, LIMBS>, ) -> (Uint<BITS, LIMBS>, bool)

Calculates the multiplication of self and rhs.

Returns a tuple of the multiplication along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would have occurred then the wrapped value is returned.

§Examples

assert_eq!(1_U1.overflowing_mul(1_U1), (1_U1, false));
assert_eq!(
    0x010000000000000000_U65.overflowing_mul(0x010000000000000000_U65),
    (0x000000000000000000_U65, true)
);

pub fn saturating_mul(self, rhs: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

Computes self * rhs, saturating at the numeric bounds instead of overflowing.

pub fn wrapping_mul(self, rhs: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

Computes self * rhs, wrapping around at the boundary of the type.

pub fn inv_ring(self) -> Option<Uint<BITS, LIMBS>>

Computes the inverse modulo $2^{\mathtt{BITS}}$ of self, returning None if the inverse does not exist.

pub fn widening_mul<const BITS_RHS: usize, const LIMBS_RHS: usize, const BITS_RES: usize, const LIMBS_RES: usize>( self, rhs: Uint<BITS_RHS, LIMBS_RHS>, ) -> Uint<BITS_RES, LIMBS_RES>

Calculates the complete product self * rhs without the possibility to overflow.

The argument rhs can be any size Uint, the result size is the sum of the bit-sizes of self and rhs.

§Panics

This function will runtime panic of the const generic arguments are incorrect.

§Examples

assert_eq!(0_U0.widening_mul(0_U0), 0_U0);
assert_eq!(1_U1.widening_mul(1_U1), 1_U2);
assert_eq!(3_U2.widening_mul(7_U3), 21_U5);

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub fn checked_pow(self, exp: Uint<BITS, LIMBS>) -> Option<Uint<BITS, LIMBS>>

Raises self to the power of exp.

Returns None if the result would overflow.

pub fn overflowing_pow( self, exp: Uint<BITS, LIMBS>, ) -> (Uint<BITS, LIMBS>, bool)

Raises self to the power of exp and if the result would overflow.

§Examples

assert_eq!(
    36_U64.overflowing_pow(12_U64),
    (0x41c21cb8e1000000_U64, false)
);
assert_eq!(
    36_U64.overflowing_pow(13_U64),
    (0x3f4c09ffa4000000_U64, true)
);
assert_eq!(
    36_U68.overflowing_pow(13_U68),
    (0x093f4c09ffa4000000_U68, false)
);
assert_eq!(16_U65.overflowing_pow(32_U65), (0_U65, true));

Small cases:

assert_eq!(0_U0.overflowing_pow(0_U0), (0_U0, false));
assert_eq!(0_U1.overflowing_pow(0_U1), (1_U1, false));
assert_eq!(0_U1.overflowing_pow(1_U1), (0_U1, false));
assert_eq!(1_U1.overflowing_pow(0_U1), (1_U1, false));
assert_eq!(1_U1.overflowing_pow(1_U1), (1_U1, false));

pub fn pow(self, exp: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

Raises self to the power of exp, wrapping around on overflow.

pub fn saturating_pow(self, exp: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

Raises self to the power of exp, saturating on overflow.

pub fn wrapping_pow(self, exp: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

Raises self to the power of exp, wrapping around on overflow.

pub fn approx_pow2(exp: f64) -> Option<Uint<BITS, LIMBS>>

Construct from double precision binary logarithm.

§Examples

assert_eq!(U64::approx_pow2(-2.0), Some(0_U64));
assert_eq!(U64::approx_pow2(-1.0), Some(1_U64));
assert_eq!(U64::approx_pow2(0.0), Some(1_U64));
assert_eq!(U64::approx_pow2(1.0), Some(2_U64));
assert_eq!(U64::approx_pow2(1.6), Some(3_U64));
assert_eq!(U64::approx_pow2(2.0), Some(4_U64));
assert_eq!(U64::approx_pow2(64.0), None);
assert_eq!(U64::approx_pow2(10.385), Some(1337_U64));

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub fn root(self, degree: usize) -> Uint<BITS, LIMBS>

Computes the floor of the degree-th root of the number.

$$ \floor{\sqrt[\mathtt{degree}]{\mathtt{self}}} $$

§Panics

Panics if degree is zero.

§Examples

assert_eq!(0_U64.root(2), 0_U64);
assert_eq!(1_U64.root(63), 1_U64);
assert_eq!(0x0032da8b0f88575d_U63.root(64), 1_U63);
assert_eq!(0x1756800000000000_U63.root(34), 3_U63);

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub const fn is_power_of_two(self) -> bool

Returns true if and only if self == 2^k for some k.

pub fn next_power_of_two(self) -> Uint<BITS, LIMBS>

Returns the smallest power of two greater than or equal to self.

§Panics

Panics if the value overlfows.

pub fn checked_next_power_of_two(self) -> Option<Uint<BITS, LIMBS>>

Returns the smallest power of two greater than or equal to self. If the next power of two is greater than the type’s maximum value, None is returned, otherwise the power of two is wrapped in Some.

§Examples

assert_eq!(0_U64.checked_next_power_of_two(), Some(1_U64));
assert_eq!(1_U64.checked_next_power_of_two(), Some(1_U64));
assert_eq!(2_U64.checked_next_power_of_two(), Some(2_U64));
assert_eq!(3_U64.checked_next_power_of_two(), Some(4_U64));
assert_eq!(U64::MAX.checked_next_power_of_two(), None);

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub fn next_multiple_of(self, rhs: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

Calculates the smallest value greater than or equal to self that is a multiple of rhs.

§Panics

This function will panic if rhs is 0 or the operation results in overflow.

pub fn checked_next_multiple_of( self, rhs: Uint<BITS, LIMBS>, ) -> Option<Uint<BITS, LIMBS>>

Calculates the smallest value greater than or equal to self that is a multiple of rhs. Returns None is rhs is zero or the operation would result in overflow.

§Examples

assert_eq!(16_U64.checked_next_multiple_of(8_U64), Some(16_U64));
assert_eq!(23_U64.checked_next_multiple_of(8_U64), Some(24_U64));
assert_eq!(1_U64.checked_next_multiple_of(0_U64), None);
assert_eq!(U64::MAX.checked_next_multiple_of(2_U64), None);
}

assert_eq!(0_U0.checked_next_multiple_of(0_U0), None);
assert_eq!(0_U1.checked_next_multiple_of(0_U1), None);
assert_eq!(0_U1.checked_next_multiple_of(1_U1), Some(0_U1));
assert_eq!(1_U1.checked_next_multiple_of(0_U1), None);
assert_eq!(1_U1.checked_next_multiple_of(1_U1), Some(1_U1));
}

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub fn from_str_radix( src: &str, radix: u64, ) -> Result<Uint<BITS, LIMBS>, ParseError>

Parse a string into a Uint.

For bases 2 to 36, the case-agnostic alphabet 0—1, a—b is used and _ are ignored. For bases 37 to 64, the case-sensitive alphabet a—z, A—Z, 0—9, {+-}, {/,_} is used. That is, for base 64 it is compatible with all the common base64 variants.

§Errors

ParseError::InvalidDigit if the string contains a non-digit.
ParseError::InvalidRadix if the radix is larger than 64.
ParseError::BaseConvertError if Uint::from_base_be fails.

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub fn random() -> Uint<BITS, LIMBS>

Creates a new Uint with the default cryptographic random number generator.

This is currently rand::rng().

pub fn random_with<R>(rng: &mut R) -> Uint<BITS, LIMBS>
where R: RngCore + ?Sized,

Creates a new Uint with the given random number generator.

pub fn randomize(&mut self)

Fills this Uint with the default cryptographic random number generator.

See random for more details.

pub fn randomize_with<R>(&mut self, rng: &mut R)
where R: RngCore + ?Sized,

Fills this Uint with the given random number generator.

§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub const LIMBS: usize

The size of this integer type in 64-bit limbs.

pub const MASK: u64

Bit mask for the last limb.

pub const BITS: usize = BITS

The size of this integer type in bits.

pub const ZERO: Uint<BITS, LIMBS>

The value zero. This is the only value that exists in all Uint types.

pub const ONE: Uint<BITS, LIMBS>

The value one. This is useful to have as a constant for use in const fn.

Zero if BITS is zero.

pub const MIN: Uint<BITS, LIMBS> = Self::ZERO

The smallest value that can be represented by this integer type. Synonym for Self::ZERO.

pub const MAX: Uint<BITS, LIMBS>

The largest value that can be represented by this integer type, $2^{\mathtt{BITS}} − 1$.

pub const fn as_limbs(&self) -> &[u64; LIMBS]

View the array of limbs.

pub unsafe fn as_limbs_mut(&mut self) -> &mut [u64; LIMBS]

Access the array of limbs.

§Safety

This function is unsafe because it allows setting a bit outside the bit size if the bit-size is not limb-aligned.

pub const fn into_limbs(self) -> [u64; LIMBS]

Convert to a array of limbs.

Limbs are least significant first.

pub const fn from_limbs(limbs: [u64; LIMBS]) -> Uint<BITS, LIMBS>

Construct a new integer from little-endian a array of limbs.

§Panics

Panics it LIMBS is not equal to nlimbs(BITS).

Panics if the value is too large for the bit-size of the Uint.

pub fn from_limbs_slice(slice: &[u64]) -> Uint<BITS, LIMBS>

Construct a new integer from little-endian a slice of limbs.

§Panics

Panics if the value is too large for the bit-size of the Uint.

pub fn checked_from_limbs_slice(slice: &[u64]) -> Option<Uint<BITS, LIMBS>>

Construct a new integer from little-endian a slice of limbs, or None if the value is too large for the Uint.

pub fn wrapping_from_limbs_slice(slice: &[u64]) -> Uint<BITS, LIMBS>

Construct a new Uint from a little-endian slice of limbs. Returns a potentially truncated value.

pub fn overflowing_from_limbs_slice(slice: &[u64]) -> (Uint<BITS, LIMBS>, bool)

Construct a new Uint from a little-endian slice of limbs. Returns a potentially truncated value and a boolean indicating whether the value was truncated.

pub fn saturating_from_limbs_slice(slice: &[u64]) -> Uint<BITS, LIMBS>

Construct a new Uint from a little-endian slice of limbs. Returns the maximum value if the value is too large for the Uint.

Get a size hint for how many bytes out of an Unstructured this type needs to construct itself. Read more

§

fn arbitrary_take_rest(u: Unstructured<'a>) -> Result<Self, Error>

Generate an arbitrary value of Self from the entirety of the given unstructured data. Read more

§

fn try_size_hint( depth: usize, ) -> Result<(usize, Option<usize>), MaxRecursionReached>

Get a size hint for how many bytes out of an Unstructured this type needs to construct itself. Read more

§

impl<const BITS: usize, const LIMBS: usize> Arbitrary for Uint<BITS, LIMBS>

§

type Parameters = ()

The type of parameters that arbitrary_with accepts for configuration of the generated Strategy. Parameters must implement Default.

§

type Strategy = Map<<[u64; LIMBS] as Arbitrary>::Strategy, fn([u64; LIMBS]) -> Uint<BITS, LIMBS>>

The type of Strategy used to generate values of type Self.

§

fn arbitrary() -> <Uint<BITS, LIMBS> as Arbitrary>::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). Read more

Performs copy-assignment from source. Read more

§

impl Compact for Uint<256, 4>

§

fn to_compact(&self, buf: &mut B) -> usize
where B: BufMut + AsMut<[u8]>,

Takes a buffer which can be written to. Ideally, it returns the length written to.

§

fn from_compact(buf: &[u8], len: usize) -> (Uint<256, 4>, &[u8])

Takes a buffer which can be read from. Returns the object and buf with its internal cursor advanced (eg..advance(len)). Read more

§

fn specialized_to_compact(&self, buf: &mut B) -> usize
where B: BufMut + AsMut<[u8]>,

“Optional”: If there’s no good reason to use it, don’t.

§

fn specialized_from_compact(buf: &[u8], len: usize) -> (Self, &[u8])

“Optional”: If there’s no good reason to use it, don’t.

§

impl Compact for Uint<96, 2>

§

fn to_compact(&self, buf: &mut B) -> usize
where B: BufMut + AsMut<[u8]>,

Takes a buffer which can be written to. Ideally, it returns the length written to.

§

fn from_compact(buf: &[u8], len: usize) -> (Uint<96, 2>, &[u8])

Takes a buffer which can be read from. Returns the object and buf with its internal cursor advanced (eg..advance(len)). Read more

§

fn specialized_to_compact(&self, buf: &mut B) -> usize
where B: BufMut + AsMut<[u8]>,

“Optional”: If there’s no good reason to use it, don’t.

§

fn specialized_from_compact(buf: &[u8], len: usize) -> (Self, &[u8])

“Optional”: If there’s no good reason to use it, don’t.

§

impl<const BITS: usize, const LIMBS: usize> Debug for Uint<BITS, LIMBS>

§

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

Formats the value using the given formatter. Read more

§

impl<const BITS: usize, const LIMBS: usize> Decodable for Uint<BITS, LIMBS>

§

fn from_ssz_bytes(bytes: &[u8]) -> Result<Uint<256, 4>, DecodeError>

Attempts to decode Self from bytes, returning a DecodeError on failure. Read more

§

impl<const BITS: usize, const LIMBS: usize> Default for Uint<BITS, LIMBS>

§

fn default() -> Uint<BITS, LIMBS>

Returns the “default value” for a type. Read more

§

impl<'de, const BITS: usize, const LIMBS: usize> Deserialize<'de> for Uint<BITS, LIMBS>

Deserialize human readable hex strings or byte arrays into Uint.

Hex strings can be upper/lower/mixed case, have an optional 0x prefix, and can be any length. They are interpreted big-endian.

Allows a Uint to be serialized as RLP.

See https://ethereum.org/en/developers/docs/data-structures-and-encoding/rlp/

§

fn length(&self) -> usize

Returns the length of the encoding of this type in bytes. Read more

§

fn encode(&self, out: &mut dyn BufMut)

Encodes the type into the out buffer.

§

fn value(&self) -> &Uint<256, 4>

returns the underlying value

§

fn is_private(&self) -> bool

returns whether the value is private

§

impl From<&FlaggedStorage> for Uint<256, 4>

§

fn from(storage: &FlaggedStorage) -> Uint<256, 4>

Converts to this type from the input type.

impl<const BITS: usize, const LIMBS: usize> Hash for Uint<BITS, LIMBS>

§

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

Feeds this value into the given Hasher. Read more

1.3.0 · Source§

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

Feeds a slice of this type into the given Hasher. Read more

Compares and returns the maximum of two values. Read more

1.21.0 · Source§

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

Compares and returns the minimum of two values. Read more

1.50.0 · Source§

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

Restrict a value to a certain interval. Read more

§

impl<const BITS: usize, const LIMBS: usize> PartialEq for Uint<BITS, LIMBS>

§

fn eq(&self, other: &Uint<BITS, LIMBS>) -> bool

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

1.0.0 · Source§

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

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

§

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<112>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<120>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<136>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<144>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<152>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<160>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<168>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<176>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<184>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<192>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<200>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<208>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<216>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<224>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<232>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<24>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<240>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<248>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<256>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<40>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<48>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<56>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<72>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<80>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<88>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

§

type SolType = Uint<96>

The Solidity type that this type corresponds to.

§

fn sol_name(&self) -> &'static str

The name of the associated Solidity type. Read more

§

fn sol_type_name(&self) -> Cow<'static, str>

👎Deprecated since 0.6.3: use sol_name instead

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fn value(self) -> Uint<256, 4>

Formats the value using the given formatter. Read more

Conversion from positive Signed to Uint of different BITS or LIMBS length.

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impl<const BITS: usize, const LIMBS: usize, T> UintTryFrom<T> for Uint<BITS, LIMBS>
where Uint<BITS, LIMBS>: TryFrom<T, Error = ToUintError<Uint<BITS, LIMBS>>>,

Blanket implementation for any type that implements TryFrom<Uint>.

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impl<const BITS: usize, const LIMBS: usize, const BITS_SRC: usize, const LIMBS_SRC: usize> UintTryFrom<Uint<BITS_SRC, LIMBS_SRC>> for Signed<BITS, LIMBS>

Conversion from Uint to positive Signed of different BITS or LIMBS length.

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impl<const BITS: usize, const LIMBS: usize, const BITS_SRC: usize, const LIMBS_SRC: usize> UintTryFrom<Uint<BITS_SRC, LIMBS_SRC>> for Uint<BITS, LIMBS>

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impl<const BITS: usize, const LIMBS: usize, T> UintTryTo<T> for Uint<BITS, LIMBS>
where T: for<'a> TryFrom<&'a Uint<BITS, LIMBS>, Error = FromUintError<T>>,

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impl<const BITS: usize, const LIMBS: usize, const BITS_DST: usize, const LIMBS_DST: usize> UintTryTo<Uint<BITS_DST, LIMBS_DST>> for Uint<BITS, LIMBS>

impl<T> Conv for T

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fn conv<T>(self) -> T
where Self: Into<T>,

Converts self into T using Into<T>. Read more

Source §

impl<T> DynClone for T
where T: Clone,

Source §

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Source §

impl<T> Instrument for T

Source §

fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

Source §

fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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Calls .tap_deref_mut() only in debug builds, and is erased in release builds.

Source §

impl<T> ToOwned for T
where T: Clone,

Source §

type Owned = T

The resulting type after obtaining ownership.

Source §

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘ
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more

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fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more

Source §

impl<T> WithSubscriber for T

Source §

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘ
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

Source §

fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more

§

impl<T, Rhs, Output> ScalarMulOwned<Rhs, Output> for T
where T: for<'r> ScalarMul<&'r Rhs, Output>,

Layout§

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.

Struct Uint Copy item path

§Notable differences from std uint types.

Implementations§

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub fn abs_diff(self, other: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

pub const fn checked_add( self, rhs: Uint<BITS, LIMBS>, ) -> Option<Uint<BITS, LIMBS>>

pub const fn checked_neg(self) -> Option<Uint<BITS, LIMBS>>

pub const fn checked_sub( self, rhs: Uint<BITS, LIMBS>, ) -> Option<Uint<BITS, LIMBS>>

pub const fn overflowing_add( self, rhs: Uint<BITS, LIMBS>, ) -> (Uint<BITS, LIMBS>, bool)

pub const fn overflowing_neg(self) -> (Uint<BITS, LIMBS>, bool)

pub const fn overflowing_sub( self, rhs: Uint<BITS, LIMBS>, ) -> (Uint<BITS, LIMBS>, bool)

pub const fn saturating_add(self, rhs: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

pub const fn saturating_sub(self, rhs: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

pub const fn wrapping_add(self, rhs: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

pub const fn wrapping_neg(self) -> Uint<BITS, LIMBS>

pub const fn wrapping_sub(self, rhs: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub fn to_base_le(&self, base: u64) -> impl Iterator<Item = u64>

§Panics

pub fn to_base_be(&self, base: u64) -> impl Iterator<Item = u64>

§Panics

pub fn from_base_le<I>( base: u64, digits: I, ) -> Result<Uint<BITS, LIMBS>, BaseConvertError>where I: IntoIterator<Item = u64>,

§Errors

pub fn from_base_be<I>( base: u64, digits: I, ) -> Result<Uint<BITS, LIMBS>, BaseConvertError>where I: IntoIterator<Item = u64>,

§Errors

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

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

pub fn set_bit(&mut self, index: usize, value: bool)

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

§Panics

§Examples

pub const fn checked_byte(&self, index: usize) -> Option<u8>

§Examples

pub fn reverse_bits(self) -> Uint<BITS, LIMBS>

pub const fn not(self) -> Uint<BITS, LIMBS>

pub const fn leading_zeros(&self) -> usize

pub const fn leading_ones(&self) -> usize

pub fn trailing_zeros(&self) -> usize

pub fn trailing_ones(&self) -> usize

pub const fn count_ones(&self) -> usize

pub const fn count_zeros(&self) -> usize

pub const fn bit_len(&self) -> usize

pub const fn byte_len(&self) -> usize

pub fn most_significant_bits(&self) -> (u64, usize)

pub const fn checked_shl(self, rhs: usize) -> Option<Uint<BITS, LIMBS>>

pub const fn saturating_shl(self, rhs: usize) -> Uint<BITS, LIMBS>

pub const fn overflowing_shl(self, rhs: usize) -> (Uint<BITS, LIMBS>, bool)

pub const fn wrapping_shl(self, rhs: usize) -> Uint<BITS, LIMBS>

pub const fn checked_shr(self, rhs: usize) -> Option<Uint<BITS, LIMBS>>

pub const fn overflowing_shr(self, rhs: usize) -> (Uint<BITS, LIMBS>, bool)

pub const fn wrapping_shr(self, rhs: usize) -> Uint<BITS, LIMBS>

pub const fn arithmetic_shr(self, rhs: usize) -> Uint<BITS, LIMBS>

pub const fn rotate_left(self, rhs: usize) -> Uint<BITS, LIMBS>

pub const fn rotate_right(self, rhs: usize) -> Uint<BITS, LIMBS>

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub const fn bitor(self, rhs: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub const fn bitand(self, rhs: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub const fn bitxor(self, rhs: Uint<BITS, LIMBS>) -> Uint<BITS, LIMBS>

impl<const BITS: usize, const LIMBS: usize> Uint<BITS, LIMBS>

pub const BYTES: usize

pub const fn as_le_slice(&self) -> &[u8] ⓘ

pub unsafe fn as_le_slice_mut(&mut self) -> &mut [u8] ⓘ

§Safety

pub fn as_le_bytes(&self) -> Cow<'_, [u8]>

pub fn as_le_bytes_trimmed(&self) -> Cow<'_, [u8]>

pub const fn to_le_bytes<const BYTES: usize>(&self) -> [u8; BYTES]

§Panics

pub fn to_le_bytes_vec(&self) -> Vec<u8> ⓘ

pub fn to_le_bytes_trimmed_vec(&self) -> Vec<u8> ⓘ

pub const fn to_be_bytes<const BYTES: usize>(&self) -> [u8; BYTES]

§Panics

pub fn to_be_bytes_vec(&self) -> Vec<u8> ⓘ

pub fn to_be_bytes_trimmed_vec(&self) -> Vec<u8> ⓘ

pub const fn from_be_bytes<const BYTES: usize>( bytes: [u8; BYTES], ) -> Uint<BITS, LIMBS>

§Panics

pub const fn from_be_slice(bytes: &[u8]) -> Uint<BITS, LIMBS>

§Panics

pub const fn try_from_be_slice(bytes: &[u8]) -> Option<Uint<BITS, LIMBS>>

Struct Uint

§Notable differences from `std` uint types.

pub fn from_base_le<I>( base: u64, digits: I, ) -> Result<Uint<BITS, LIMBS>, BaseConvertError>
where I: IntoIterator<Item = u64>,

pub fn from_base_be<I>( base: u64, digits: I, ) -> Result<Uint<BITS, LIMBS>, BaseConvertError>
where I: IntoIterator<Item = u64>,

pub fn from<T>(value: T) -> Uint<BITS, LIMBS>
where Uint<BITS, LIMBS>: UintTryFrom<T>,

pub fn saturating_from<T>(value: T) -> Uint<BITS, LIMBS>
where Uint<BITS, LIMBS>: UintTryFrom<T>,

pub fn wrapping_from<T>(value: T) -> Uint<BITS, LIMBS>
where Uint<BITS, LIMBS>: UintTryFrom<T>,

pub fn to<T>(&self) -> T
where Uint<BITS, LIMBS>: UintTryTo<T>, T: Debug,

pub fn wrapping_to<T>(&self) -> T
where Uint<BITS, LIMBS>: UintTryTo<T>,

pub fn saturating_to<T>(&self) -> T
where Uint<BITS, LIMBS>: UintTryTo<T>,