# Type Alias core::arch::x86_64::__mmask8

source ·

    pub type __mmask8 = u8;

🔬This is a nightly-only experimental API. (`stdsimd` #48556)
Available on x86-64 and (x86 or x86-64) only.
Expand description

The `__mmask8` type used in AVX-512 intrinsics, a 8-bit integer

## Implementations§

source§

### impl u8

1.43.0 · source

#### pub const MIN: Self = 0u8

The smallest value that can be represented by this integer type.

##### Examples

Basic usage:

    assert_eq!(u8::MIN, 0);

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1.43.0 · source

#### pub const MAX: Self = 255u8

The largest value that can be represented by this integer type (28 − 1).

##### Examples

Basic usage:

    assert_eq!(u8::MAX, 255);

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1.53.0 · source

#### pub const BITS: u32 = 8u32

The size of this integer type in bits.

##### Examples

    assert_eq!(u8::BITS, 8);

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1.0.0 · source

#### pub fn from_str_radix(src: &str, radix: u32) -> Result<Self, ParseIntError>

Converts a string slice in a given base to an integer.

The string is expected to be an optional `+` sign followed by digits. Leading and trailing whitespace represent an error. Digits are a subset of these characters, depending on `radix`:

- `0-9`
- `a-z`
- `A-Z`

##### Panics

This function panics if `radix` is not in the range from 2 to 36.

##### Examples

Basic usage:

    assert_eq!(u8::from_str_radix("A", 16), Ok(10));

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1.0.0 (const: 1.32.0) · source

#### pub const fn count_ones(self) -> u32

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

##### Examples

Basic usage:

    let n = 0b01001100u8;

    assert_eq!(n.count_ones(), 3);

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1.0.0 (const: 1.32.0) · source

#### pub const fn count_zeros(self) -> u32

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

##### Examples

Basic usage:

    assert_eq!(u8::MAX.count_zeros(), 0);

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1.0.0 (const: 1.32.0) · source

#### pub const fn leading_zeros(self) -> u32

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

Depending on what you’re doing with the value, you might also be interested in the `ilog2` function which returns a consistent number, even if the type widens.

##### Examples

Basic usage:

    let n = u8::MAX >> 2;

    assert_eq!(n.leading_zeros(), 2);

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1.0.0 (const: 1.32.0) · source

#### pub const fn trailing_zeros(self) -> u32

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

##### Examples

Basic usage:

    let n = 0b0101000u8;

    assert_eq!(n.trailing_zeros(), 3);

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1.46.0 (const: 1.46.0) · source

#### pub const fn leading_ones(self) -> u32

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

##### Examples

Basic usage:

    let n = !(u8::MAX >> 2);

    assert_eq!(n.leading_ones(), 2);

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1.46.0 (const: 1.46.0) · source

#### pub const fn trailing_ones(self) -> u32

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

##### Examples

Basic usage:

    let n = 0b1010111u8;

    assert_eq!(n.trailing_ones(), 3);

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1.0.0 (const: 1.32.0) · source

#### pub const fn rotate_left(self, n: u32) -> Self

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

Please note this isn’t the same operation as the `<<` shifting operator!

##### Examples

Basic usage:

    let n = 0x82u8;
    let m = 0xa;

    assert_eq!(n.rotate_left(2), m);

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1.0.0 (const: 1.32.0) · source

#### pub const fn rotate_right(self, n: u32) -> Self

Shifts the bits to the right by a specified amount, `n`, wrapping the truncated bits to the beginning of the resulting integer.

Please note this isn’t the same operation as the `>>` shifting operator!

##### Examples

Basic usage:

    let n = 0xau8;
    let m = 0x82;

    assert_eq!(n.rotate_right(2), m);

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1.0.0 (const: 1.32.0) · source

#### pub const fn swap_bytes(self) -> Self

Reverses the byte order of the integer.

##### Examples

Basic usage:

    let n = 0x12u8;
    let m = n.swap_bytes();

    assert_eq!(m, 0x12);

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1.37.0 (const: 1.37.0) · source

#### pub const fn reverse_bits(self) -> Self

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.

##### Examples

Basic usage:

    let n = 0x12u8;
    let m = n.reverse_bits();

    assert_eq!(m, 0x48);
    assert_eq!(0, 0u8.reverse_bits());

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1.0.0 (const: 1.32.0) · source

#### pub const fn from_be(x: Self) -> Self

Converts an integer from big endian to the target’s endianness.

On big endian this is a no-op. On little endian the bytes are swapped.

##### Examples

Basic usage:

    let n = 0x1Au8;

    if cfg!(target_endian = "big") {
        assert_eq!(u8::from_be(n), n)
    } else {
        assert_eq!(u8::from_be(n), n.swap_bytes())
    }

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1.0.0 (const: 1.32.0) · source

#### pub const fn from_le(x: Self) -> Self

Converts an integer from little endian to the target’s endianness.

On little endian this is a no-op. On big endian the bytes are swapped.

##### Examples

Basic usage:

    let n = 0x1Au8;

    if cfg!(target_endian = "little") {
        assert_eq!(u8::from_le(n), n)
    } else {
        assert_eq!(u8::from_le(n), n.swap_bytes())
    }

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1.0.0 (const: 1.32.0) · source

#### pub const fn to_be(self) -> Self

Converts `self` to big endian from the target’s endianness.

On big endian this is a no-op. On little endian the bytes are swapped.

##### Examples

Basic usage:

    let n = 0x1Au8;

    if cfg!(target_endian = "big") {
        assert_eq!(n.to_be(), n)
    } else {
        assert_eq!(n.to_be(), n.swap_bytes())
    }

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1.0.0 (const: 1.32.0) · source

#### pub const fn to_le(self) -> Self

Converts `self` to little endian from the target’s endianness.

On little endian this is a no-op. On big endian the bytes are swapped.

##### Examples

Basic usage:

    let n = 0x1Au8;

    if cfg!(target_endian = "little") {
        assert_eq!(n.to_le(), n)
    } else {
        assert_eq!(n.to_le(), n.swap_bytes())
    }

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1.0.0 (const: 1.47.0) · source

#### pub const fn checked_add(self, rhs: Self) -> Option<Self>

Checked integer addition. Computes `self + rhs`, returning `None` if overflow occurred.

##### Examples

Basic usage:

    assert_eq!((u8::MAX - 2).checked_add(1), Some(u8::MAX - 1));
    assert_eq!((u8::MAX - 2).checked_add(3), None);

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const: unstable · source

#### pub unsafe fn unchecked_add(self, rhs: Self) -> Self

🔬This is a nightly-only experimental API. (`unchecked_math` #85122)

Unchecked integer addition. Computes `self + rhs`, assuming overflow cannot occur.

##### Safety

This results in undefined behavior when `self + rhs > u8::MAX` or `self + rhs < u8::MIN`, i.e. when `checked_add` would return `None`.

1.66.0 (const: 1.66.0) · source

#### pub const fn checked_add_signed(self, rhs: i8) -> Option<Self>

Checked addition with a signed integer. Computes `self + rhs`, returning `None` if overflow occurred.

##### Examples

Basic usage:

    assert_eq!(1u8.checked_add_signed(2), Some(3));
    assert_eq!(1u8.checked_add_signed(-2), None);
    assert_eq!((u8::MAX - 2).checked_add_signed(3), None);

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1.0.0 (const: 1.47.0) · source

#### pub const fn checked_sub(self, rhs: Self) -> Option<Self>

Checked integer subtraction. Computes `self - rhs`, returning `None` if overflow occurred.

##### Examples

Basic usage:

    assert_eq!(1u8.checked_sub(1), Some(0));
    assert_eq!(0u8.checked_sub(1), None);

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const: unstable · source

#### pub unsafe fn unchecked_sub(self, rhs: Self) -> Self

🔬This is a nightly-only experimental API. (`unchecked_math` #85122)

Unchecked integer subtraction. Computes `self - rhs`, assuming overflow cannot occur.

##### Safety

This results in undefined behavior when `self - rhs > u8::MAX` or `self - rhs < u8::MIN`, i.e. when `checked_sub` would return `None`.

1.0.0 (const: 1.47.0) · source

#### pub const fn checked_mul(self, rhs: Self) -> Option<Self>

Checked integer multiplication. Computes `self * rhs`, returning `None` if overflow occurred.

##### Examples

Basic usage:

    assert_eq!(5u8.checked_mul(1), Some(5));
    assert_eq!(u8::MAX.checked_mul(2), None);

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const: unstable · source

#### pub unsafe fn unchecked_mul(self, rhs: Self) -> Self

🔬This is a nightly-only experimental API. (`unchecked_math` #85122)

Unchecked integer multiplication. Computes `self * rhs`, assuming overflow cannot occur.

##### Safety

This results in undefined behavior when `self * rhs > u8::MAX` or `self * rhs < u8::MIN`, i.e. when `checked_mul` would return `None`.

1.0.0 (const: 1.52.0) · source

#### pub const fn checked_div(self, rhs: Self) -> Option<Self>

Checked integer division. Computes `self / rhs`, returning `None` if `rhs == 0`.

##### Examples

Basic usage:

    assert_eq!(128u8.checked_div(2), Some(64));
    assert_eq!(1u8.checked_div(0), None);

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1.38.0 (const: 1.52.0) · source

#### pub const fn checked_div_euclid(self, rhs: Self) -> Option<Self>

Checked Euclidean division. Computes `self.div_euclid(rhs)`, returning `None` if `rhs == 0`.

##### Examples

Basic usage:

    assert_eq!(128u8.checked_div_euclid(2), Some(64));
    assert_eq!(1u8.checked_div_euclid(0), None);

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1.7.0 (const: 1.52.0) · source

#### pub const fn checked_rem(self, rhs: Self) -> Option<Self>

Checked integer remainder. Computes `self % rhs`, returning `None` if `rhs == 0`.

##### Examples

Basic usage:

    assert_eq!(5u8.checked_rem(2), Some(1));
    assert_eq!(5u8.checked_rem(0), None);

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1.38.0 (const: 1.52.0) · source

#### pub const fn checked_rem_euclid(self, rhs: Self) -> Option<Self>

Checked Euclidean modulo. Computes `self.rem_euclid(rhs)`, returning `None` if `rhs == 0`.

##### Examples

Basic usage:

    assert_eq!(5u8.checked_rem_euclid(2), Some(1));
    assert_eq!(5u8.checked_rem_euclid(0), None);

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1.67.0 (const: 1.67.0) · source

#### pub const fn ilog(self, base: Self) -> u32

Returns the logarithm of the number with respect to an arbitrary base, rounded down.

This method might not be optimized owing to implementation details; `ilog2` can produce results more efficiently for base 2, and `ilog10` can produce results more efficiently for base 10.

##### Panics

This function will panic if `self` is zero, or if `base` is less than 2.

##### Examples

    assert_eq!(5u8.ilog(5), 1);

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1.67.0 (const: 1.67.0) · source

#### pub const fn ilog2(self) -> u32

Returns the base 2 logarithm of the number, rounded down.

##### Panics

This function will panic if `self` is zero.

##### Examples

    assert_eq!(2u8.ilog2(), 1);

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1.67.0 (const: 1.67.0) · source

#### pub const fn ilog10(self) -> u32

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

##### Panics

This function will panic if `self` is zero.

##### Example

    assert_eq!(10u8.ilog10(), 1);

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1.67.0 (const: 1.67.0) · source

#### pub const fn checked_ilog(self, base: Self) -> Option<u32>

Returns the logarithm of the number with respect to an arbitrary base, rounded down.

Returns `None` if the number is zero, or if the base is not at least 2.

This method might not be optimized owing to implementation details; `checked_ilog2` can produce results more efficiently for base 2, and `checked_ilog10` can produce results more efficiently for base 10.

##### Examples

    assert_eq!(5u8.checked_ilog(5), Some(1));

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1.67.0 (const: 1.67.0) · source

#### pub const fn checked_ilog2(self) -> Option<u32>

Returns the base 2 logarithm of the number, rounded down.

Returns `None` if the number is zero.

##### Examples

    assert_eq!(2u8.checked_ilog2(), Some(1));

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1.67.0 (const: 1.67.0) · source

#### pub const fn checked_ilog10(self) -> Option<u32>

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

Returns `None` if the number is zero.

##### Examples

    assert_eq!(10u8.checked_ilog10(), Some(1));

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1.7.0 (const: 1.47.0) · source

#### pub const fn checked_neg(self) -> Option<Self>

Checked negation. Computes `-self`, returning `None` unless `self == 0`.

Note that negating any positive integer will overflow.

##### Examples

Basic usage:

    assert_eq!(0u8.checked_neg(), Some(0));
    assert_eq!(1u8.checked_neg(), None);

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1.7.0 (const: 1.47.0) · source

#### pub const fn checked_shl(self, rhs: u32) -> Option<Self>

Checked shift left. Computes `self << rhs`, returning `None` if `rhs` is larger than or equal to the number of bits in `self`.

##### Examples

Basic usage:

    assert_eq!(0x1u8.checked_shl(4), Some(0x10));
    assert_eq!(0x10u8.checked_shl(129), None);

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const: unstable · source

#### pub unsafe fn unchecked_shl(self, rhs: u32) -> Self

🔬This is a nightly-only experimental API. (`unchecked_math` #85122)

Unchecked shift left. Computes `self << rhs`, assuming that `rhs` is less than the number of bits in `self`.

##### Safety

This results in undefined behavior if `rhs` is larger than or equal to the number of bits in `self`, i.e. when `checked_shl` would return `None`.

1.7.0 (const: 1.47.0) · source

#### pub const fn checked_shr(self, rhs: u32) -> Option<Self>

Checked shift right. Computes `self >> rhs`, returning `None` if `rhs` is larger than or equal to the number of bits in `self`.

##### Examples

Basic usage:

    assert_eq!(0x10u8.checked_shr(4), Some(0x1));
    assert_eq!(0x10u8.checked_shr(129), None);

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const: unstable · source

#### pub unsafe fn unchecked_shr(self, rhs: u32) -> Self

🔬This is a nightly-only experimental API. (`unchecked_math` #85122)

Unchecked shift right. Computes `self >> rhs`, assuming that `rhs` is less than the number of bits in `self`.

##### Safety

This results in undefined behavior if `rhs` is larger than or equal to the number of bits in `self`, i.e. when `checked_shr` would return `None`.

1.34.0 (const: 1.50.0) · source

#### pub const fn checked_pow(self, exp: u32) -> Option<Self>

Checked exponentiation. Computes `self.pow(exp)`, returning `None` if overflow occurred.

##### Examples

Basic usage:

    assert_eq!(2u8.checked_pow(5), Some(32));
    assert_eq!(u8::MAX.checked_pow(2), None);

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1.0.0 (const: 1.47.0) · source

#### pub const fn saturating_add(self, rhs: Self) -> Self

Saturating integer addition. Computes `self + rhs`, saturating at the numeric bounds instead of overflowing.

##### Examples

Basic usage:

    assert_eq!(100u8.saturating_add(1), 101);
    assert_eq!(u8::MAX.saturating_add(127), u8::MAX);

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1.66.0 (const: 1.66.0) · source

#### pub const fn saturating_add_signed(self, rhs: i8) -> Self

Saturating addition with a signed integer. Computes `self + rhs`, saturating at the numeric bounds instead of overflowing.

##### Examples

Basic usage:

    assert_eq!(1u8.saturating_add_signed(2), 3);
    assert_eq!(1u8.saturating_add_signed(-2), 0);
    assert_eq!((u8::MAX - 2).saturating_add_signed(4), u8::MAX);

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1.0.0 (const: 1.47.0) · source

#### pub const fn saturating_sub(self, rhs: Self) -> Self

Saturating integer subtraction. Computes `self - rhs`, saturating at the numeric bounds instead of overflowing.

##### Examples

Basic usage:

    assert_eq!(100u8.saturating_sub(27), 73);
    assert_eq!(13u8.saturating_sub(127), 0);

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1.7.0 (const: 1.47.0) · source

#### pub const fn saturating_mul(self, rhs: Self) -> Self

Saturating integer multiplication. Computes `self * rhs`, saturating at the numeric bounds instead of overflowing.

##### Examples

Basic usage:

    assert_eq!(2u8.saturating_mul(10), 20);
    assert_eq!((u8::MAX).saturating_mul(10), u8::MAX);

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1.58.0 (const: 1.58.0) · source

#### pub const fn saturating_div(self, rhs: Self) -> Self

Saturating integer division. Computes `self / rhs`, saturating at the numeric bounds instead of overflowing.

##### Examples

Basic usage:

    assert_eq!(5u8.saturating_div(2), 2);

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ⓘ

    let _ = 1u8.saturating_div(0);

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1.34.0 (const: 1.50.0) · source

#### pub const fn saturating_pow(self, exp: u32) -> Self

Saturating integer exponentiation. Computes `self.pow(exp)`, saturating at the numeric bounds instead of overflowing.

##### Examples

Basic usage:

    assert_eq!(4u8.saturating_pow(3), 64);
    assert_eq!(u8::MAX.saturating_pow(2), u8::MAX);

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1.0.0 (const: 1.32.0) · source

#### pub const fn wrapping_add(self, rhs: Self) -> Self

Wrapping (modular) addition. Computes `self + rhs`, wrapping around at the boundary of the type.

##### Examples

Basic usage:

    assert_eq!(200u8.wrapping_add(55), 255);
    assert_eq!(200u8.wrapping_add(u8::MAX), 199);

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1.66.0 (const: 1.66.0) · source

#### pub const fn wrapping_add_signed(self, rhs: i8) -> Self

Wrapping (modular) addition with a signed integer. Computes `self + rhs`, wrapping around at the boundary of the type.

##### Examples

Basic usage:

    assert_eq!(1u8.wrapping_add_signed(2), 3);
    assert_eq!(1u8.wrapping_add_signed(-2), u8::MAX);
    assert_eq!((u8::MAX - 2).wrapping_add_signed(4), 1);

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1.0.0 (const: 1.32.0) · source

#### pub const fn wrapping_sub(self, rhs: Self) -> Self

Wrapping (modular) subtraction. Computes `self - rhs`, wrapping around at the boundary of the type.

##### Examples

Basic usage:

    assert_eq!(100u8.wrapping_sub(100), 0);
    assert_eq!(100u8.wrapping_sub(u8::MAX), 101);

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1.0.0 (const: 1.32.0) · source

#### pub const fn wrapping_mul(self, rhs: Self) -> Self

Wrapping (modular) multiplication. Computes `self * rhs`, wrapping around at the boundary of the type.

##### Examples

Basic usage:

Please note that this example is shared between integer types. Which explains why `u8` is used here.

    assert_eq!(10u8.wrapping_mul(12), 120);
    assert_eq!(25u8.wrapping_mul(12), 44);

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1.2.0 (const: 1.52.0) · source

#### pub const fn wrapping_div(self, rhs: Self) -> Self

Wrapping (modular) division. Computes `self / rhs`. Wrapped division on unsigned types is just normal division. There’s no way wrapping could ever happen. This function exists, so that all operations are accounted for in the wrapping operations.

##### Panics

This function will panic if `rhs` is 0.

##### Examples

Basic usage:

    assert_eq!(100u8.wrapping_div(10), 10);

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1.38.0 (const: 1.52.0) · source

#### pub const fn wrapping_div_euclid(self, rhs: Self) -> Self

Wrapping Euclidean division. Computes `self.div_euclid(rhs)`. Wrapped division on unsigned types is just normal division. There’s no way wrapping could ever happen. This function exists, so that all operations are accounted for in the wrapping operations. Since, for the positive integers, all common definitions of division are equal, this is exactly equal to `self.wrapping_div(rhs)`.

##### Panics

This function will panic if `rhs` is 0.

##### Examples

Basic usage:

    assert_eq!(100u8.wrapping_div_euclid(10), 10);

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1.2.0 (const: 1.52.0) · source

#### pub const fn wrapping_rem(self, rhs: Self) -> Self

Wrapping (modular) remainder. Computes `self % rhs`. Wrapped remainder calculation on unsigned types is just the regular remainder calculation. There’s no way wrapping could ever happen. This function exists, so that all operations are accounted for in the wrapping operations.

##### Panics

This function will panic if `rhs` is 0.

##### Examples

Basic usage:

    assert_eq!(100u8.wrapping_rem(10), 0);

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1.38.0 (const: 1.52.0) · source

#### pub const fn wrapping_rem_euclid(self, rhs: Self) -> Self

Wrapping Euclidean modulo. Computes `self.rem_euclid(rhs)`. Wrapped modulo calculation on unsigned types is just the regular remainder calculation. There’s no way wrapping could ever happen. This function exists, so that all operations are accounted for in the wrapping operations. Since, for the positive integers, all common definitions of division are equal, this is exactly equal to `self.wrapping_rem(rhs)`.

##### Panics

This function will panic if `rhs` is 0.

##### Examples

Basic usage:

    assert_eq!(100u8.wrapping_rem_euclid(10), 0);

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1.2.0 (const: 1.32.0) · source

#### pub const fn wrapping_neg(self) -> Self

Wrapping (modular) negation. Computes `-self`, wrapping around at the boundary of the type.

Since unsigned types do not have negative equivalents all applications of this function will wrap (except for `-0`). For values smaller than the corresponding signed type’s maximum the result is the same as casting the corresponding signed value. Any larger values are equivalent to `MAX + 1 - (val - MAX - 1)` where `MAX` is the corresponding signed type’s maximum.

##### Examples

Basic usage:

    assert_eq!(0_u8.wrapping_neg(), 0);
    assert_eq!(u8::MAX.wrapping_neg(), 1);
    assert_eq!(13_u8.wrapping_neg(), (!13) + 1);
    assert_eq!(42_u8.wrapping_neg(), !(42 - 1));

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1.2.0 (const: 1.32.0) · source

#### pub const fn wrapping_shl(self, rhs: u32) -> Self

Panic-free bitwise shift-left; yields `self << mask(rhs)`, where `mask` removes any high-order bits of `rhs` that would cause the shift to exceed the bitwidth of the type.

Note that this is not the same as a rotate-left; the RHS of a wrapping shift-left is restricted to the range of the type, rather than the bits shifted out of the LHS being returned to the other end. The primitive integer types all implement a `rotate_left` function, which may be what you want instead.

##### Examples

Basic usage:

    assert_eq!(1u8.wrapping_shl(7), 128);
    assert_eq!(1u8.wrapping_shl(128), 1);

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1.2.0 (const: 1.32.0) · source

#### pub const fn wrapping_shr(self, rhs: u32) -> Self

Panic-free bitwise shift-right; yields `self >> mask(rhs)`, where `mask` removes any high-order bits of `rhs` that would cause the shift to exceed the bitwidth of the type.

Note that this is not the same as a rotate-right; the RHS of a wrapping shift-right is restricted to the range of the type, rather than the bits shifted out of the LHS being returned to the other end. The primitive integer types all implement a `rotate_right` function, which may be what you want instead.

##### Examples

Basic usage:

    assert_eq!(128u8.wrapping_shr(7), 1);
    assert_eq!(128u8.wrapping_shr(128), 128);

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1.34.0 (const: 1.50.0) · source

#### pub const fn wrapping_pow(self, exp: u32) -> Self

Wrapping (modular) exponentiation. Computes `self.pow(exp)`, wrapping around at the boundary of the type.

##### Examples

Basic usage:

    assert_eq!(3u8.wrapping_pow(5), 243);
    assert_eq!(3u8.wrapping_pow(6), 217);

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1.7.0 (const: 1.32.0) · source

#### pub const fn overflowing_add(self, rhs: Self) -> (Self, bool)

Calculates `self` + `rhs`

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.

##### Examples

Basic usage

    assert_eq!(5u8.overflowing_add(2), (7, false));
    assert_eq!(u8::MAX.overflowing_add(1), (0, true));

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const: unstable · source

#### pub fn carrying_add(self, rhs: Self, carry: bool) -> (Self, bool)

🔬This is a nightly-only experimental API. (`bigint_helper_methods` #85532)

Calculates `self` + `rhs` + `carry` and returns a tuple containing the sum and the output carry.

Performs “ternary addition” of two integer operands and a carry-in bit, and returns an output integer and a carry-out bit. This allows chaining together multiple additions to create a wider addition, and can be useful for bignum addition.

This can be thought of as a 8-bit “full adder”, in the electronics sense.

If the input carry is false, this method is equivalent to `overflowing_add`, and the output carry is equal to the overflow flag. Note that although carry and overflow flags are similar for unsigned integers, they are different for signed integers.

##### Examples

    #![feature(bigint_helper_methods)]

    //    3  MAX    (a = 3 × 2^8 + 2^8 - 1)
    // +  5    7    (b = 5 × 2^8 + 7)
    // ---------
    //    9    6    (sum = 9 × 2^8 + 6)

    let (a1, a0): (u8, u8) = (3, u8::MAX);
    let (b1, b0): (u8, u8) = (5, 7);
    let carry0 = false;

    let (sum0, carry1) = a0.carrying_add(b0, carry0);
    assert_eq!(carry1, true);
    let (sum1, carry2) = a1.carrying_add(b1, carry1);
    assert_eq!(carry2, false);

    assert_eq!((sum1, sum0), (9, 6));

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1.66.0 (const: 1.66.0) · source

#### pub const fn overflowing_add_signed(self, rhs: i8) -> (Self, bool)

Calculates `self` + `rhs` with a signed `rhs`

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.

##### Examples

Basic usage:

    assert_eq!(1u8.overflowing_add_signed(2), (3, false));
    assert_eq!(1u8.overflowing_add_signed(-2), (u8::MAX, true));
    assert_eq!((u8::MAX - 2).overflowing_add_signed(4), (1, true));

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1.7.0 (const: 1.32.0) · source

#### pub const fn overflowing_sub(self, rhs: Self) -> (Self, bool)

Calculates `self` - `rhs`

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.

##### Examples

Basic usage

    assert_eq!(5u8.overflowing_sub(2), (3, false));
    assert_eq!(0u8.overflowing_sub(1), (u8::MAX, true));

Run
const: unstable · source

#### pub fn borrowing_sub(self, rhs: Self, borrow: bool) -> (Self, bool)

🔬This is a nightly-only experimental API. (`bigint_helper_methods` #85532)

Calculates `self` − `rhs` − `borrow` and returns a tuple containing the difference and the output borrow.

Performs “ternary subtraction” by subtracting both an integer operand and a borrow-in bit from `self`, and returns an output integer and a borrow-out bit. This allows chaining together multiple subtractions to create a wider subtraction, and can be useful for bignum subtraction.

##### Examples

    #![feature(bigint_helper_methods)]

    //    9    6    (a = 9 × 2^8 + 6)
    // -  5    7    (b = 5 × 2^8 + 7)
    // ---------
    //    3  MAX    (diff = 3 × 2^8 + 2^8 - 1)

    let (a1, a0): (u8, u8) = (9, 6);
    let (b1, b0): (u8, u8) = (5, 7);
    let borrow0 = false;

    let (diff0, borrow1) = a0.borrowing_sub(b0, borrow0);
    assert_eq!(borrow1, true);
    let (diff1, borrow2) = a1.borrowing_sub(b1, borrow1);
    assert_eq!(borrow2, false);

    assert_eq!((diff1, diff0), (3, u8::MAX));

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1.60.0 (const: 1.60.0) · source

#### pub const fn abs_diff(self, other: Self) -> Self

Computes the absolute difference between `self` and `other`.

##### Examples

Basic usage:

    assert_eq!(100u8.abs_diff(80), 20u8);
    assert_eq!(100u8.abs_diff(110), 10u8);

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1.7.0 (const: 1.32.0) · source

#### pub const fn overflowing_mul(self, rhs: Self) -> (Self, 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

Basic usage:

Please note that this example is shared between integer types. Which explains why `u32` is used here.

    assert_eq!(5u32.overflowing_mul(2), (10, false));
    assert_eq!(1_000_000_000u32.overflowing_mul(10), (1410065408, true));

Run
1.7.0 (const: 1.52.0) · source

#### pub const fn overflowing_div(self, rhs: Self) -> (Self, bool)

Calculates the divisor when `self` is divided by `rhs`.

Returns a tuple of the divisor along with a boolean indicating whether an arithmetic overflow would occur. Note that for unsigned integers overflow never occurs, so the second value is always `false`.

##### Panics

This function will panic if `rhs` is 0.

##### Examples

Basic usage

    assert_eq!(5u8.overflowing_div(2), (2, false));

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1.38.0 (const: 1.52.0) · source

#### pub const fn overflowing_div_euclid(self, rhs: Self) -> (Self, bool)

Calculates the quotient of Euclidean division `self.div_euclid(rhs)`.

Returns a tuple of the divisor along with a boolean indicating whether an arithmetic overflow would occur. Note that for unsigned integers overflow never occurs, so the second value is always `false`. Since, for the positive integers, all common definitions of division are equal, this is exactly equal to `self.overflowing_div(rhs)`.

##### Panics

This function will panic if `rhs` is 0.

##### Examples

Basic usage

    assert_eq!(5u8.overflowing_div_euclid(2), (2, false));

Run
1.7.0 (const: 1.52.0) · source

#### pub const fn overflowing_rem(self, rhs: Self) -> (Self, bool)

Calculates the remainder when `self` is divided by `rhs`.

Returns a tuple of the remainder after dividing along with a boolean indicating whether an arithmetic overflow would occur. Note that for unsigned integers overflow never occurs, so the second value is always `false`.

##### Panics

This function will panic if `rhs` is 0.

##### Examples

Basic usage

    assert_eq!(5u8.overflowing_rem(2), (1, false));

Run
1.38.0 (const: 1.52.0) · source

#### pub const fn overflowing_rem_euclid(self, rhs: Self) -> (Self, bool)

Calculates the remainder `self.rem_euclid(rhs)` as if by Euclidean division.

Returns a tuple of the modulo after dividing along with a boolean indicating whether an arithmetic overflow would occur. Note that for unsigned integers overflow never occurs, so the second value is always `false`. Since, for the positive integers, all common definitions of division are equal, this operation is exactly equal to `self.overflowing_rem(rhs)`.

##### Panics

This function will panic if `rhs` is 0.

##### Examples

Basic usage

    assert_eq!(5u8.overflowing_rem_euclid(2), (1, false));

Run
1.7.0 (const: 1.32.0) · source

#### pub const fn overflowing_neg(self) -> (Self, bool)

Negates self in an overflowing fashion.

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.

##### Examples

Basic usage

    assert_eq!(0u8.overflowing_neg(), (0, false));
    assert_eq!(2u8.overflowing_neg(), (-2i32 as u8, true));

Run
1.7.0 (const: 1.32.0) · source

#### pub const fn overflowing_shl(self, rhs: u32) -> (Self, bool)

Shifts self left by `rhs` bits.

Returns a tuple of the shifted version of self along with a boolean indicating whether the shift value was larger than or equal to the number of bits. If the shift value is too large, then value is masked (N-1) where N is the number of bits, and this value is then used to perform the shift.

##### Examples

Basic usage

    assert_eq!(0x1u8.overflowing_shl(4), (0x10, false));
    assert_eq!(0x1u8.overflowing_shl(132), (0x10, true));

Run
1.7.0 (const: 1.32.0) · source

#### pub const fn overflowing_shr(self, rhs: u32) -> (Self, bool)

Shifts self right by `rhs` bits.

Returns a tuple of the shifted version of self along with a boolean indicating whether the shift value was larger than or equal to the number of bits. If the shift value is too large, then value is masked (N-1) where N is the number of bits, and this value is then used to perform the shift.

##### Examples

Basic usage

    assert_eq!(0x10u8.overflowing_shr(4), (0x1, false));
    assert_eq!(0x10u8.overflowing_shr(132), (0x1, true));

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1.34.0 (const: 1.50.0) · source

#### pub const fn overflowing_pow(self, exp: u32) -> (Self, bool)

Raises self to the power of `exp`, using exponentiation by squaring.

Returns a tuple of the exponentiation along with a bool indicating whether an overflow happened.

##### Examples

Basic usage:

    assert_eq!(3u8.overflowing_pow(5), (243, false));
    assert_eq!(3u8.overflowing_pow(6), (217, true));

Run
1.0.0 (const: 1.50.0) · source

#### pub const fn pow(self, exp: u32) -> Self

Raises self to the power of `exp`, using exponentiation by squaring.

##### Examples

Basic usage:

    assert_eq!(2u8.pow(5), 32);

Run
const: unstable · source

#### pub fn isqrt(self) -> Self

🔬This is a nightly-only experimental API. (`isqrt` #116226)

Returns the square root of the number, rounded down.

##### Examples

Basic usage:

    #![feature(isqrt)]
    assert_eq!(10u8.isqrt(), 3);

Run
1.38.0 (const: 1.52.0) · source

#### pub const fn div_euclid(self, rhs: Self) -> Self

Performs Euclidean division.

Since, for the positive integers, all common definitions of division are equal, this is exactly equal to `self / rhs`.

##### Panics

This function will panic if `rhs` is 0.

##### Examples

Basic usage:

    assert_eq!(7u8.div_euclid(4), 1); // or any other integer type

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1.38.0 (const: 1.52.0) · source

#### pub const fn rem_euclid(self, rhs: Self) -> Self

Calculates the least remainder of `self (mod rhs)`.

Since, for the positive integers, all common definitions of division are equal, this is exactly equal to `self % rhs`.

##### Panics

This function will panic if `rhs` is 0.

##### Examples

Basic usage:

    assert_eq!(7u8.rem_euclid(4), 3); // or any other integer type

Run
source

#### pub const fn div_floor(self, rhs: Self) -> Self

🔬This is a nightly-only experimental API. (`int_roundings` #88581)

Calculates the quotient of `self` and `rhs`, rounding the result towards negative infinity.

This is the same as performing `self / rhs` for all unsigned integers.

##### Panics

This function will panic if `rhs` is zero.

##### Examples

Basic usage:

    #![feature(int_roundings)]
    assert_eq!(7_u8.div_floor(4), 1);

Run
1.73.0 (const: 1.73.0) · source

#### pub const fn div_ceil(self, rhs: Self) -> Self

Calculates the quotient of `self` and `rhs`, rounding the result towards positive infinity.

##### Panics

This function will panic if `rhs` is zero.

###### Overflow behavior

On overflow, this function will panic if overflow checks are enabled (default in debug mode) and wrap if overflow checks are disabled (default in release mode).

##### Examples

Basic usage:

    assert_eq!(7_u8.div_ceil(4), 2);

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1.73.0 (const: 1.73.0) · source

#### pub const fn next_multiple_of(self, rhs: Self) -> Self

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

##### Panics

This function will panic if `rhs` is zero.

###### Overflow behavior

On overflow, this function will panic if overflow checks are enabled (default in debug mode) and wrap if overflow checks are disabled (default in release mode).

##### Examples

Basic usage:

    assert_eq!(16_u8.next_multiple_of(8), 16);
    assert_eq!(23_u8.next_multiple_of(8), 24);

Run
1.73.0 (const: 1.73.0) · source

#### pub const fn checked_next_multiple_of(self, rhs: Self) -> Option<Self>

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

##### Examples

Basic usage:

    assert_eq!(16_u8.checked_next_multiple_of(8), Some(16));
    assert_eq!(23_u8.checked_next_multiple_of(8), Some(24));
    assert_eq!(1_u8.checked_next_multiple_of(0), None);
    assert_eq!(u8::MAX.checked_next_multiple_of(2), None);

Run
1.0.0 (const: 1.32.0) · source

#### pub const fn is_power_of_two(self) -> bool

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

##### Examples

Basic usage:

    assert!(16u8.is_power_of_two());
    assert!(!10u8.is_power_of_two());

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1.0.0 (const: 1.50.0) · source

#### pub const fn next_power_of_two(self) -> Self

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

When return value overflows (i.e., `self > (1 << (N-1))` for type `uN`), it panics in debug mode and the return value is wrapped to 0 in release mode (the only situation in which method can return 0).

##### Examples

Basic usage:

    assert_eq!(2u8.next_power_of_two(), 2);
    assert_eq!(3u8.next_power_of_two(), 4);

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1.0.0 (const: 1.50.0) · source

#### pub const fn checked_next_power_of_two(self) -> Option<Self>

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

Basic usage:

    assert_eq!(2u8.checked_next_power_of_two(), Some(2));
    assert_eq!(3u8.checked_next_power_of_two(), Some(4));
    assert_eq!(u8::MAX.checked_next_power_of_two(), None);

Run
const: unstable · source

#### pub fn wrapping_next_power_of_two(self) -> Self

🔬This is a nightly-only experimental API. (`wrapping_next_power_of_two` #32463)

Returns the smallest power of two greater than or equal to `n`. If the next power of two is greater than the type’s maximum value, the return value is wrapped to `0`.

##### Examples

Basic usage:

    #![feature(wrapping_next_power_of_two)]

    assert_eq!(2u8.wrapping_next_power_of_two(), 2);
    assert_eq!(3u8.wrapping_next_power_of_two(), 4);
    assert_eq!(u8::MAX.wrapping_next_power_of_two(), 0);

Run
1.32.0 (const: 1.44.0) · source

#### pub const fn to_be_bytes(self) -> [u8; 1]

Return the memory representation of this integer as a byte array in big-endian (network) byte order.

##### Examples

    let bytes = 0x12u8.to_be_bytes();
    assert_eq!(bytes, [0x12]);

Run
1.32.0 (const: 1.44.0) · source

#### pub const fn to_le_bytes(self) -> [u8; 1]

Return the memory representation of this integer as a byte array in little-endian byte order.

##### Examples

    let bytes = 0x12u8.to_le_bytes();
    assert_eq!(bytes, [0x12]);

Run
1.32.0 (const: 1.44.0) · source

#### pub const fn to_ne_bytes(self) -> [u8; 1]

Return the memory representation of this integer as a byte array in native byte order.

As the target platform’s native endianness is used, portable code should use `to_be_bytes` or `to_le_bytes`, as appropriate, instead.

##### Examples

    let bytes = 0x12u8.to_ne_bytes();
    assert_eq!(
        bytes,
        if cfg!(target_endian = "big") {
            [0x12]
        } else {
            [0x12]
        }
    );

Run
1.32.0 (const: 1.44.0) · source

#### pub const fn from_be_bytes(bytes: [u8; 1]) -> Self

Create a native endian integer value from its representation as a byte array in big endian.

##### Examples

    let value = u8::from_be_bytes([0x12]);
    assert_eq!(value, 0x12);

Run

When starting from a slice rather than an array, fallible conversion APIs can be used:

    fn read_be_u8(input: &mut &[u8]) -> u8 {
        let (int_bytes, rest) = input.split_at(std::mem::size_of::<u8>());
        *input = rest;
        u8::from_be_bytes(int_bytes.try_into().unwrap())
    }

Run
1.32.0 (const: 1.44.0) · source

#### pub const fn from_le_bytes(bytes: [u8; 1]) -> Self

Create a native endian integer value from its representation as a byte array in little endian.

##### Examples

    let value = u8::from_le_bytes([0x12]);
    assert_eq!(value, 0x12);

Run

When starting from a slice rather than an array, fallible conversion APIs can be used:

    fn read_le_u8(input: &mut &[u8]) -> u8 {
        let (int_bytes, rest) = input.split_at(std::mem::size_of::<u8>());
        *input = rest;
        u8::from_le_bytes(int_bytes.try_into().unwrap())
    }

Run
1.32.0 (const: 1.44.0) · source

#### pub const fn from_ne_bytes(bytes: [u8; 1]) -> Self

Create a native endian integer value from its memory representation as a byte array in native endianness.

As the target platform’s native endianness is used, portable code likely wants to use `from_be_bytes` or `from_le_bytes`, as appropriate instead.

##### Examples

    let value = u8::from_ne_bytes(if cfg!(target_endian = "big") {
        [0x12]
    } else {
        [0x12]
    });
    assert_eq!(value, 0x12);

Run

When starting from a slice rather than an array, fallible conversion APIs can be used:

    fn read_ne_u8(input: &mut &[u8]) -> u8 {
        let (int_bytes, rest) = input.split_at(std::mem::size_of::<u8>());
        *input = rest;
        u8::from_ne_bytes(int_bytes.try_into().unwrap())
    }

Run
1.0.0 (const: 1.32.0) · source

#### pub const fn min_value() -> Self

👎Deprecating in a future Rust version: replaced by the `MIN` associated constant on this type

New code should prefer to use `u8::MIN` instead.

Returns the smallest value that can be represented by this integer type.

1.0.0 (const: 1.32.0) · source

#### pub const fn max_value() -> Self

👎Deprecating in a future Rust version: replaced by the `MAX` associated constant on this type

New code should prefer to use `u8::MAX` instead.

Returns the largest value that can be represented by this integer type.

const: unstable · source

#### pub fn widening_mul(self, rhs: Self) -> (Self, Self)

🔬This is a nightly-only experimental API. (`bigint_helper_methods` #85532)

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

This returns the low-order (wrapping) bits and the high-order (overflow) bits of the result as two separate values, in that order.

If you also need to add a carry to the wide result, then you want `Self::carrying_mul` instead.

##### Examples

Basic usage:

Please note that this example is shared between integer types. Which explains why `u32` is used here.

    #![feature(bigint_helper_methods)]
    assert_eq!(5u32.widening_mul(2), (10, 0));
    assert_eq!(1_000_000_000u32.widening_mul(10), (1410065408, 2));

Run
const: unstable · source

#### pub fn carrying_mul(self, rhs: Self, carry: Self) -> (Self, Self)

🔬This is a nightly-only experimental API. (`bigint_helper_methods` #85532)

Calculates the “full multiplication” `self * rhs + carry` without the possibility to overflow.

This returns the low-order (wrapping) bits and the high-order (overflow) bits of the result as two separate values, in that order.

Performs “long multiplication” which takes in an extra amount to add, and may return an additional amount of overflow. This allows for chaining together multiple multiplications to create “big integers” which represent larger values.

If you don’t need the `carry`, then you can use `Self::widening_mul` instead.

##### Examples

Basic usage:

Please note that this example is shared between integer types. Which explains why `u32` is used here.

    #![feature(bigint_helper_methods)]
    assert_eq!(5u32.carrying_mul(2, 0), (10, 0));
    assert_eq!(5u32.carrying_mul(2, 10), (20, 0));
    assert_eq!(1_000_000_000u32.carrying_mul(10, 0), (1410065408, 2));
    assert_eq!(1_000_000_000u32.carrying_mul(10, 10), (1410065418, 2));
    assert_eq!(u8::MAX.carrying_mul(u8::MAX, u8::MAX), (0, u8::MAX));

Run

This is the core operation needed for scalar multiplication when implementing it for wider-than-native types.

    #![feature(bigint_helper_methods)]
    fn scalar_mul_eq(little_endian_digits: &mut Vec<u16>, multiplicand: u16) {
        let mut carry = 0;
        for d in little_endian_digits.iter_mut() {
            (*d, carry) = d.carrying_mul(multiplicand, carry);
        }
        if carry != 0 {
            little_endian_digits.push(carry);
        }
    }

    let mut v = vec![10, 20];
    scalar_mul_eq(&mut v, 3);
    assert_eq!(v, [30, 60]);

    assert_eq!(0x87654321_u64 * 0xFEED, 0x86D3D159E38D);
    let mut v = vec![0x4321, 0x8765];
    scalar_mul_eq(&mut v, 0xFEED);
    assert_eq!(v, [0xE38D, 0xD159, 0x86D3]);

Run

If `carry` is zero, this is similar to `overflowing_mul`, except that it gives the value of the overflow instead of just whether one happened:

    #![feature(bigint_helper_methods)]
    let r = u8::carrying_mul(7, 13, 0);
    assert_eq!((r.0, r.1 != 0), u8::overflowing_mul(7, 13));
    let r = u8::carrying_mul(13, 42, 0);
    assert_eq!((r.0, r.1 != 0), u8::overflowing_mul(13, 42));

Run

The value of the first field in the returned tuple matches what you’d get by combining the `wrapping_mul` and `wrapping_add` methods:

    #![feature(bigint_helper_methods)]
    assert_eq!(
        789_u16.carrying_mul(456, 123).0,
        789_u16.wrapping_mul(456).wrapping_add(123),
    );

Run
const: unstable · source

#### pub fn midpoint(self, rhs: u8) -> u8

🔬This is a nightly-only experimental API. (`num_midpoint` #110840)

Calculates the middle point of `self` and `rhs`.

`midpoint(a, b)` is `(a + b) >> 1` as if it were performed in a sufficiently-large signed integral type. This implies that the result is always rounded towards negative infinity and that no overflow will ever occur.

##### Examples

    #![feature(num_midpoint)]
    assert_eq!(0u8.midpoint(4), 2);
    assert_eq!(1u8.midpoint(4), 2);

Run
1.23.0 (const: 1.43.0) · source

#### pub const fn is_ascii(&self) -> bool

Checks if the value is within the ASCII range.

##### Examples

    let ascii = 97u8;
    let non_ascii = 150u8;

    assert!(ascii.is_ascii());
    assert!(!non_ascii.is_ascii());

Run
source

#### pub const fn as_ascii(&self) -> Option<Char>

🔬This is a nightly-only experimental API. (`ascii_char` #110998)

If the value of this byte is within the ASCII range, returns it as an ASCII character. Otherwise, returns `None`.

1.23.0 (const: 1.52.0) · source

#### pub const fn to_ascii_uppercase(&self) -> u8

Makes a copy of the value in its ASCII upper case equivalent.

ASCII letters ‘a’ to ‘z’ are mapped to ‘A’ to ‘Z’, but non-ASCII letters are unchanged.

To uppercase the value in-place, use `make_ascii_uppercase`.

##### Examples

    let lowercase_a = 97u8;

    assert_eq!(65, lowercase_a.to_ascii_uppercase());

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1.23.0 (const: 1.52.0) · source

#### pub const fn to_ascii_lowercase(&self) -> u8

Makes a copy of the value in its ASCII lower case equivalent.

ASCII letters ‘A’ to ‘Z’ are mapped to ‘a’ to ‘z’, but non-ASCII letters are unchanged.

To lowercase the value in-place, use `make_ascii_lowercase`.

##### Examples

    let uppercase_a = 65u8;

    assert_eq!(97, uppercase_a.to_ascii_lowercase());

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1.23.0 (const: 1.52.0) · source

#### pub const fn eq_ignore_ascii_case(&self, other: &u8) -> bool

Checks that two values are an ASCII case-insensitive match.

This is equivalent to `to_ascii_lowercase(a) == to_ascii_lowercase(b)`.

##### Examples

    let lowercase_a = 97u8;
    let uppercase_a = 65u8;

    assert!(lowercase_a.eq_ignore_ascii_case(&uppercase_a));

Run
1.23.0 · source

#### pub fn make_ascii_uppercase(&mut self)

Converts this value to its ASCII upper case equivalent in-place.

ASCII letters ‘a’ to ‘z’ are mapped to ‘A’ to ‘Z’, but non-ASCII letters are unchanged.

To return a new uppercased value without modifying the existing one, use `to_ascii_uppercase`.

##### Examples

    let mut byte = b'a';

    byte.make_ascii_uppercase();

    assert_eq!(b'A', byte);

Run
1.23.0 · source

#### pub fn make_ascii_lowercase(&mut self)

Converts this value to its ASCII lower case equivalent in-place.

ASCII letters ‘A’ to ‘Z’ are mapped to ‘a’ to ‘z’, but non-ASCII letters are unchanged.

To return a new lowercased value without modifying the existing one, use `to_ascii_lowercase`.

##### Examples

    let mut byte = b'A';

    byte.make_ascii_lowercase();

    assert_eq!(b'a', byte);

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1.24.0 (const: 1.47.0) · source

#### pub const fn is_ascii_alphabetic(&self) -> bool

Checks if the value is an ASCII alphabetic character:

- U+0041 ‘A’ ..= U+005A ‘Z’, or
- U+0061 ‘a’ ..= U+007A ‘z’.

##### Examples

    let uppercase_a = b'A';
    let uppercase_g = b'G';
    let a = b'a';
    let g = b'g';
    let zero = b'0';
    let percent = b'%';
    let space = b' ';
    let lf = b'\n';
    let esc = b'\x1b';

    assert!(uppercase_a.is_ascii_alphabetic());
    assert!(uppercase_g.is_ascii_alphabetic());
    assert!(a.is_ascii_alphabetic());
    assert!(g.is_ascii_alphabetic());
    assert!(!zero.is_ascii_alphabetic());
    assert!(!percent.is_ascii_alphabetic());
    assert!(!space.is_ascii_alphabetic());
    assert!(!lf.is_ascii_alphabetic());
    assert!(!esc.is_ascii_alphabetic());

Run
1.24.0 (const: 1.47.0) · source

#### pub const fn is_ascii_uppercase(&self) -> bool

Checks if the value is an ASCII uppercase character: U+0041 ‘A’ ..= U+005A ‘Z’.

##### Examples

    let uppercase_a = b'A';
    let uppercase_g = b'G';
    let a = b'a';
    let g = b'g';
    let zero = b'0';
    let percent = b'%';
    let space = b' ';
    let lf = b'\n';
    let esc = b'\x1b';

    assert!(uppercase_a.is_ascii_uppercase());
    assert!(uppercase_g.is_ascii_uppercase());
    assert!(!a.is_ascii_uppercase());
    assert!(!g.is_ascii_uppercase());
    assert!(!zero.is_ascii_uppercase());
    assert!(!percent.is_ascii_uppercase());
    assert!(!space.is_ascii_uppercase());
    assert!(!lf.is_ascii_uppercase());
    assert!(!esc.is_ascii_uppercase());

Run
1.24.0 (const: 1.47.0) · source

#### pub const fn is_ascii_lowercase(&self) -> bool

Checks if the value is an ASCII lowercase character: U+0061 ‘a’ ..= U+007A ‘z’.

##### Examples

    let uppercase_a = b'A';
    let uppercase_g = b'G';
    let a = b'a';
    let g = b'g';
    let zero = b'0';
    let percent = b'%';
    let space = b' ';
    let lf = b'\n';
    let esc = b'\x1b';

    assert!(!uppercase_a.is_ascii_lowercase());
    assert!(!uppercase_g.is_ascii_lowercase());
    assert!(a.is_ascii_lowercase());
    assert!(g.is_ascii_lowercase());
    assert!(!zero.is_ascii_lowercase());
    assert!(!percent.is_ascii_lowercase());
    assert!(!space.is_ascii_lowercase());
    assert!(!lf.is_ascii_lowercase());
    assert!(!esc.is_ascii_lowercase());

Run
1.24.0 (const: 1.47.0) · source

#### pub const fn is_ascii_alphanumeric(&self) -> bool

Checks if the value is an ASCII alphanumeric character:

- U+0041 ‘A’ ..= U+005A ‘Z’, or
- U+0061 ‘a’ ..= U+007A ‘z’, or
- U+0030 ‘0’ ..= U+0039 ‘9’.

##### Examples

    let uppercase_a = b'A';
    let uppercase_g = b'G';
    let a = b'a';
    let g = b'g';
    let zero = b'0';
    let percent = b'%';
    let space = b' ';
    let lf = b'\n';
    let esc = b'\x1b';

    assert!(uppercase_a.is_ascii_alphanumeric());
    assert!(uppercase_g.is_ascii_alphanumeric());
    assert!(a.is_ascii_alphanumeric());
    assert!(g.is_ascii_alphanumeric());
    assert!(zero.is_ascii_alphanumeric());
    assert!(!percent.is_ascii_alphanumeric());
    assert!(!space.is_ascii_alphanumeric());
    assert!(!lf.is_ascii_alphanumeric());
    assert!(!esc.is_ascii_alphanumeric());

Run
1.24.0 (const: 1.47.0) · source

#### pub const fn is_ascii_digit(&self) -> bool

Checks if the value is an ASCII decimal digit: U+0030 ‘0’ ..= U+0039 ‘9’.

##### Examples

    let uppercase_a = b'A';
    let uppercase_g = b'G';
    let a = b'a';
    let g = b'g';
    let zero = b'0';
    let percent = b'%';
    let space = b' ';
    let lf = b'\n';
    let esc = b'\x1b';

    assert!(!uppercase_a.is_ascii_digit());
    assert!(!uppercase_g.is_ascii_digit());
    assert!(!a.is_ascii_digit());
    assert!(!g.is_ascii_digit());
    assert!(zero.is_ascii_digit());
    assert!(!percent.is_ascii_digit());
    assert!(!space.is_ascii_digit());
    assert!(!lf.is_ascii_digit());
    assert!(!esc.is_ascii_digit());

Run
const: unstable · source

#### pub fn is_ascii_octdigit(&self) -> bool

🔬This is a nightly-only experimental API. (`is_ascii_octdigit` #101288)

Checks if the value is an ASCII octal digit: U+0030 ‘0’ ..= U+0037 ‘7’.

##### Examples

    #![feature(is_ascii_octdigit)]

    let uppercase_a = b'A';
    let a = b'a';
    let zero = b'0';
    let seven = b'7';
    let nine = b'9';
    let percent = b'%';
    let lf = b'\n';

    assert!(!uppercase_a.is_ascii_octdigit());
    assert!(!a.is_ascii_octdigit());
    assert!(zero.is_ascii_octdigit());
    assert!(seven.is_ascii_octdigit());
    assert!(!nine.is_ascii_octdigit());
    assert!(!percent.is_ascii_octdigit());
    assert!(!lf.is_ascii_octdigit());

Run
1.24.0 (const: 1.47.0) · source

#### pub const fn is_ascii_hexdigit(&self) -> bool

Checks if the value is an ASCII hexadecimal digit:

- U+0030 ‘0’ ..= U+0039 ‘9’, or
- U+0041 ‘A’ ..= U+0046 ‘F’, or
- U+0061 ‘a’ ..= U+0066 ‘f’.

##### Examples

    let uppercase_a = b'A';
    let uppercase_g = b'G';
    let a = b'a';
    let g = b'g';
    let zero = b'0';
    let percent = b'%';
    let space = b' ';
    let lf = b'\n';
    let esc = b'\x1b';

    assert!(uppercase_a.is_ascii_hexdigit());
    assert!(!uppercase_g.is_ascii_hexdigit());
    assert!(a.is_ascii_hexdigit());
    assert!(!g.is_ascii_hexdigit());
    assert!(zero.is_ascii_hexdigit());
    assert!(!percent.is_ascii_hexdigit());
    assert!(!space.is_ascii_hexdigit());
    assert!(!lf.is_ascii_hexdigit());
    assert!(!esc.is_ascii_hexdigit());

Run
1.24.0 (const: 1.47.0) · source

#### pub const fn is_ascii_punctuation(&self) -> bool

Checks if the value is an ASCII punctuation character:

- U+0021 ..= U+002F `! " # $ % & ' ( ) * + , - . /`, or
- U+003A ..= U+0040 `: ; < = > ? @`, or
- U+005B ..= U+0060 `[ \ ] ^ _ ``, or
- U+007B ..= U+007E `{ | } ~`

##### Examples

    let uppercase_a = b'A';
    let uppercase_g = b'G';
    let a = b'a';
    let g = b'g';
    let zero = b'0';
    let percent = b'%';
    let space = b' ';
    let lf = b'\n';
    let esc = b'\x1b';

    assert!(!uppercase_a.is_ascii_punctuation());
    assert!(!uppercase_g.is_ascii_punctuation());
    assert!(!a.is_ascii_punctuation());
    assert!(!g.is_ascii_punctuation());
    assert!(!zero.is_ascii_punctuation());
    assert!(percent.is_ascii_punctuation());
    assert!(!space.is_ascii_punctuation());
    assert!(!lf.is_ascii_punctuation());
    assert!(!esc.is_ascii_punctuation());

Run
1.24.0 (const: 1.47.0) · source

#### pub const fn is_ascii_graphic(&self) -> bool

Checks if the value is an ASCII graphic character: U+0021 ‘!’ ..= U+007E ‘~’.

##### Examples

    let uppercase_a = b'A';
    let uppercase_g = b'G';
    let a = b'a';
    let g = b'g';
    let zero = b'0';
    let percent = b'%';
    let space = b' ';
    let lf = b'\n';
    let esc = b'\x1b';

    assert!(uppercase_a.is_ascii_graphic());
    assert!(uppercase_g.is_ascii_graphic());
    assert!(a.is_ascii_graphic());
    assert!(g.is_ascii_graphic());
    assert!(zero.is_ascii_graphic());
    assert!(percent.is_ascii_graphic());
    assert!(!space.is_ascii_graphic());
    assert!(!lf.is_ascii_graphic());
    assert!(!esc.is_ascii_graphic());

Run
1.24.0 (const: 1.47.0) · source

#### pub const fn is_ascii_whitespace(&self) -> bool

Checks if the value is an ASCII whitespace character: U+0020 SPACE, U+0009 HORIZONTAL TAB, U+000A LINE FEED, U+000C FORM FEED, or U+000D CARRIAGE RETURN.

Rust uses the WhatWG Infra Standard’s definition of ASCII whitespace. There are several other definitions in wide use. For instance, the POSIX locale includes U+000B VERTICAL TAB as well as all the above characters, but—from the very same specification—the default rule for “field splitting” in the Bourne shell considers only SPACE, HORIZONTAL TAB, and LINE FEED as whitespace.

If you are writing a program that will process an existing file format, check what that format’s definition of whitespace is before using this function.

##### Examples

    let uppercase_a = b'A';
    let uppercase_g = b'G';
    let a = b'a';
    let g = b'g';
    let zero = b'0';
    let percent = b'%';
    let space = b' ';
    let lf = b'\n';
    let esc = b'\x1b';

    assert!(!uppercase_a.is_ascii_whitespace());
    assert!(!uppercase_g.is_ascii_whitespace());
    assert!(!a.is_ascii_whitespace());
    assert!(!g.is_ascii_whitespace());
    assert!(!zero.is_ascii_whitespace());
    assert!(!percent.is_ascii_whitespace());
    assert!(space.is_ascii_whitespace());
    assert!(lf.is_ascii_whitespace());
    assert!(!esc.is_ascii_whitespace());

Run
1.24.0 (const: 1.47.0) · source

#### pub const fn is_ascii_control(&self) -> bool

Checks if the value is an ASCII control character: U+0000 NUL ..= U+001F UNIT SEPARATOR, or U+007F DELETE. Note that most ASCII whitespace characters are control characters, but SPACE is not.

##### Examples

    let uppercase_a = b'A';
    let uppercase_g = b'G';
    let a = b'a';
    let g = b'g';
    let zero = b'0';
    let percent = b'%';
    let space = b' ';
    let lf = b'\n';
    let esc = b'\x1b';

    assert!(!uppercase_a.is_ascii_control());
    assert!(!uppercase_g.is_ascii_control());
    assert!(!a.is_ascii_control());
    assert!(!g.is_ascii_control());
    assert!(!zero.is_ascii_control());
    assert!(!percent.is_ascii_control());
    assert!(!space.is_ascii_control());
    assert!(lf.is_ascii_control());
    assert!(esc.is_ascii_control());

Run
1.60.0 · source

#### pub fn escape_ascii(self) -> EscapeDefault ⓘ

Returns an iterator that produces an escaped version of a `u8`, treating it as an ASCII character.

The behavior is identical to `ascii::escape_default`.

##### Examples

    assert_eq!("0", b'0'.escape_ascii().to_string());
    assert_eq!("\\t", b'\t'.escape_ascii().to_string());
    assert_eq!("\\r", b'\r'.escape_ascii().to_string());
    assert_eq!("\\n", b'\n'.escape_ascii().to_string());
    assert_eq!("\\'", b'\''.escape_ascii().to_string());
    assert_eq!("\\\"", b'"'.escape_ascii().to_string());
    assert_eq!("\\\\", b'\\'.escape_ascii().to_string());
    assert_eq!("\\x9d", b'\x9d'.escape_ascii().to_string());

Run

## Trait Implementations§

1.0.0 · source§

### impl Add<&u8> for u8

§

#### type Output = <u8 as Add<u8>>::Output

The resulting type after applying the `+` operator.
source§

#### fn add(self, other: &u8) -> <u8 as Add<u8>>::Output

Performs the `+` operation. Read more
1.0.0 · source§

### impl Add<u8> for u8

§

#### type Output = u8

The resulting type after applying the `+` operator.
source§

#### fn add(self, other: u8) -> u8

Performs the `+` operation. Read more
1.22.0 · source§

### impl AddAssign<&u8> for u8

source§

#### fn add_assign(&mut self, other: &u8)

Performs the `+=` operation. Read more
1.8.0 · source§

### impl AddAssign<u8> for u8

source§

#### fn add_assign(&mut self, other: u8)

Performs the `+=` operation. Read more
1.0.0 · source§

### impl Binary for u8

source§

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

Formats the value using the given formatter.
1.0.0 · source§

### impl BitAnd<&u8> for u8

§

#### type Output = <u8 as BitAnd<u8>>::Output

The resulting type after applying the `&` operator.
source§

#### fn bitand(self, other: &u8) -> <u8 as BitAnd<u8>>::Output

Performs the `&` operation. Read more
1.0.0 · source§

### impl BitAnd<u8> for u8

§

#### type Output = u8

The resulting type after applying the `&` operator.
source§

#### fn bitand(self, rhs: u8) -> u8

Performs the `&` operation. Read more
1.22.0 · source§

### impl BitAndAssign<&u8> for u8

source§

#### fn bitand_assign(&mut self, other: &u8)

Performs the `&=` operation. Read more
1.8.0 · source§

### impl BitAndAssign<u8> for u8

source§

#### fn bitand_assign(&mut self, other: u8)

Performs the `&=` operation. Read more
1.0.0 · source§

### impl BitOr<&u8> for u8

§

#### type Output = <u8 as BitOr<u8>>::Output

The resulting type after applying the `|` operator.
source§

#### fn bitor(self, other: &u8) -> <u8 as BitOr<u8>>::Output

Performs the `|` operation. Read more
1.45.0 · source§

### impl BitOr<NonZeroU8> for u8

§

#### type Output = NonZeroU8

The resulting type after applying the `|` operator.
source§

#### fn bitor(self, rhs: NonZeroU8) -> Self::Output

Performs the `|` operation. Read more
1.0.0 · source§

### impl BitOr<u8> for u8

§

#### type Output = u8

The resulting type after applying the `|` operator.
source§

#### fn bitor(self, rhs: u8) -> u8

Performs the `|` operation. Read more
1.22.0 · source§

### impl BitOrAssign<&u8> for u8

source§

#### fn bitor_assign(&mut self, other: &u8)

Performs the `|=` operation. Read more
1.8.0 · source§

### impl BitOrAssign<u8> for u8

source§

#### fn bitor_assign(&mut self, other: u8)

Performs the `|=` operation. Read more
1.0.0 · source§

### impl BitXor<&u8> for u8

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#### type Output = <u8 as BitXor<u8>>::Output

The resulting type after applying the `^` operator.
source§

#### fn bitxor(self, other: &u8) -> <u8 as BitXor<u8>>::Output

Performs the `^` operation. Read more
1.0.0 · source§

### impl BitXor<u8> for u8

§

#### type Output = u8

The resulting type after applying the `^` operator.
source§

#### fn bitxor(self, other: u8) -> u8

Performs the `^` operation. Read more
1.22.0 · source§

### impl BitXorAssign<&u8> for u8

source§

#### fn bitxor_assign(&mut self, other: &u8)

Performs the `^=` operation. Read more
1.8.0 · source§

### impl BitXorAssign<u8> for u8

source§

#### fn bitxor_assign(&mut self, other: u8)

Performs the `^=` operation. Read more
1.0.0 · source§

### impl Clone for u8

source§

#### fn clone(&self) -> Self

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from `source`. Read more
1.0.0 · source§

### impl Debug for u8

source§

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

Formats the value using the given formatter. Read more
1.0.0 · source§

### impl Default for u8

source§

#### fn default() -> u8

Returns the default value of `0`

1.0.0 · source§

### impl Display for u8

source§

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

Formats the value using the given formatter. Read more
1.0.0 · source§

### impl Div<&u8> for u8

§

#### type Output = <u8 as Div<u8>>::Output

The resulting type after applying the `/` operator.
source§

#### fn div(self, other: &u8) -> <u8 as Div<u8>>::Output

Performs the `/` operation. Read more
1.51.0 · source§

### impl Div<NonZeroU8> for u8

source§

#### fn div(self, other: NonZeroU8) -> u8

This operation rounds towards zero, truncating any fractional part of the exact result, and cannot panic.

§

#### type Output = u8

The resulting type after applying the `/` operator.
1.0.0 · source§

### impl Div<u8> for u8

This operation rounds towards zero, truncating any fractional part of the exact result.

#### Panics

This operation will panic if `other == 0`.

§

#### type Output = u8

The resulting type after applying the `/` operator.
source§

#### fn div(self, other: u8) -> u8

Performs the `/` operation. Read more
1.22.0 · source§

### impl DivAssign<&u8> for u8

source§

#### fn div_assign(&mut self, other: &u8)

Performs the `/=` operation. Read more
1.8.0 · source§

### impl DivAssign<u8> for u8

source§

#### fn div_assign(&mut self, other: u8)

Performs the `/=` operation. Read more
1.31.0 · source§

### impl From<NonZeroU8> for u8

source§

#### fn from(nonzero: NonZeroU8) -> Self

Converts a `NonZeroU8` into an `u8`

1.28.0 · source§

### impl From<bool> for u8

source§

#### fn from(small: bool) -> Self

Converts a `bool` to a `u8`. The resulting value is `0` for `false` and `1` for `true` values.

##### Examples

    assert_eq!(u8::from(true), 1);
    assert_eq!(u8::from(false), 0);

Run
1.0.0 · source§

### impl FromStr for u8

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#### type Err = ParseIntError

The associated error which can be returned from parsing.
source§

#### fn from_str(src: &str) -> Result<Self, ParseIntError>

Parses a string `s` to return a value of this type. Read more
1.0.0 · source§

### impl Hash for u8

source§

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

Feeds this value into the given `Hasher`. Read more
source§

#### fn hash_slice<H: Hasher>(data: &[u8], state: &mut H)

Feeds a slice of this type into the given `Hasher`. Read more
1.42.0 · source§

### impl LowerExp for u8

source§

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

Formats the value using the given formatter.
1.0.0 · source§

### impl LowerHex for u8

source§

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

Formats the value using the given formatter.
1.0.0 · source§

### impl Mul<&u8> for u8

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#### type Output = <u8 as Mul<u8>>::Output

The resulting type after applying the `*` operator.
source§

#### fn mul(self, other: &u8) -> <u8 as Mul<u8>>::Output

Performs the `*` operation. Read more
1.0.0 · source§

### impl Mul<u8> for u8

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#### type Output = u8

The resulting type after applying the `*` operator.
source§

#### fn mul(self, other: u8) -> u8

Performs the `*` operation. Read more
1.22.0 · source§

### impl MulAssign<&u8> for u8

source§

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

Performs the `*=` operation. Read more
1.8.0 · source§

### impl MulAssign<u8> for u8

source§

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

Performs the `*=` operation. Read more
1.0.0 · source§

### impl Not for u8

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#### type Output = u8

The resulting type after applying the `!` operator.
source§

#### fn not(self) -> u8

Performs the unary `!` operation. Read more
1.0.0 · source§

### impl Octal for u8

source§

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

Formats the value using the given formatter.
1.0.0 · source§

### impl Ord for u8

source§

#### fn cmp(&self, other: &u8) -> Ordering

This method returns an `Ordering` between `self` and `other`. Read more
1.21.0 · source§

#### fn max(self, other: Self) -> Selfwhere Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

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

Compares and returns the minimum of two values. Read more
1.50.0 · source§

#### fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
1.0.0 · source§

### impl PartialEq<u8> for u8

source§

#### fn eq(&self, other: &u8) -> bool

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

#### fn ne(&self, other: &u8) -> bool

This method tests for `!=`. The default implementation is almost always sufficient, and should not be overridden without very good reason.
1.0.0 · source§

### impl PartialOrd<u8> for u8

source§

#### fn partial_cmp(&self, other: &u8) -> Option<Ordering>

This method returns an ordering between `self` and `other` values if one exists. Read more
source§

#### fn lt(&self, other: &u8) -> bool

This method tests less than (for `self` and `other`) and is used by the `<` operator. Read more
source§

#### fn le(&self, other: &u8) -> bool

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

#### fn ge(&self, other: &u8) -> bool

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

#### fn gt(&self, other: &u8) -> bool

This method tests greater than (for `self` and `other`) and is used by the `>` operator. Read more
1.12.0 · source§

### impl<'a> Product<&'a u8> for u8

source§

#### fn product<I: Iterator<Item = &'a Self>>(iter: I) -> Self

Method which takes an iterator and generates `Self` from the elements by multiplying the items.
1.12.0 · source§

### impl Product<u8> for u8

source§

#### fn product<I: Iterator<Item = Self>>(iter: I) -> Self

Method which takes an iterator and generates `Self` from the elements by multiplying the items.
1.0.0 · source§

### impl Rem<&u8> for u8

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#### type Output = <u8 as Rem<u8>>::Output

The resulting type after applying the `%` operator.
source§

#### fn rem(self, other: &u8) -> <u8 as Rem<u8>>::Output

Performs the `%` operation. Read more
1.51.0 · source§

### impl Rem<NonZeroU8> for u8

source§

#### fn rem(self, other: NonZeroU8) -> u8

This operation satisfies `n % d == n - (n / d) * d`, and cannot panic.

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#### type Output = u8

The resulting type after applying the `%` operator.
1.0.0 · source§

### impl Rem<u8> for u8

This operation satisfies `n % d == n - (n / d) * d`. The result has the same sign as the left operand.

#### Panics

This operation will panic if `other == 0`.

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#### type Output = u8

The resulting type after applying the `%` operator.
source§

#### fn rem(self, other: u8) -> u8

Performs the `%` operation. Read more
1.22.0 · source§

### impl RemAssign<&u8> for u8

source§

#### fn rem_assign(&mut self, other: &u8)

Performs the `%=` operation. Read more
1.8.0 · source§

### impl RemAssign<u8> for u8

source§

#### fn rem_assign(&mut self, other: u8)

Performs the `%=` operation. Read more
1.0.0 · source§

### impl Shl<&i128> for u8

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#### type Output = <u8 as Shl<i128>>::Output

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: &i128) -> <u8 as Shl<i128>>::Output

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<&i16> for u8

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#### type Output = <u8 as Shl<i16>>::Output

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: &i16) -> <u8 as Shl<i16>>::Output

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<&i32> for u8

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#### type Output = <u8 as Shl<i32>>::Output

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: &i32) -> <u8 as Shl<i32>>::Output

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<&i64> for u8

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#### type Output = <u8 as Shl<i64>>::Output

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: &i64) -> <u8 as Shl<i64>>::Output

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<&i8> for u8

§

#### type Output = <u8 as Shl<i8>>::Output

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: &i8) -> <u8 as Shl<i8>>::Output

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<&isize> for u8

§

#### type Output = <u8 as Shl<isize>>::Output

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: &isize) -> <u8 as Shl<isize>>::Output

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<&u128> for u8

§

#### type Output = <u8 as Shl<u128>>::Output

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: &u128) -> <u8 as Shl<u128>>::Output

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<&u16> for u8

§

#### type Output = <u8 as Shl<u16>>::Output

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: &u16) -> <u8 as Shl<u16>>::Output

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<&u32> for u8

§

#### type Output = <u8 as Shl<u32>>::Output

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: &u32) -> <u8 as Shl<u32>>::Output

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<&u64> for u8

§

#### type Output = <u8 as Shl<u64>>::Output

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: &u64) -> <u8 as Shl<u64>>::Output

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<&u8> for u8

§

#### type Output = <u8 as Shl<u8>>::Output

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: &u8) -> <u8 as Shl<u8>>::Output

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<&usize> for u8

§

#### type Output = <u8 as Shl<usize>>::Output

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: &usize) -> <u8 as Shl<usize>>::Output

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<i128> for u8

§

#### type Output = u8

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: i128) -> u8

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<i16> for u8

§

#### type Output = u8

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: i16) -> u8

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<i32> for u8

§

#### type Output = u8

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: i32) -> u8

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<i64> for u8

§

#### type Output = u8

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: i64) -> u8

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<i8> for u8

§

#### type Output = u8

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: i8) -> u8

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<isize> for u8

§

#### type Output = u8

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: isize) -> u8

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<u128> for u8

§

#### type Output = u8

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: u128) -> u8

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<u16> for u8

§

#### type Output = u8

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: u16) -> u8

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<u32> for u8

§

#### type Output = u8

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: u32) -> u8

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<u64> for u8

§

#### type Output = u8

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: u64) -> u8

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<u8> for u8

§

#### type Output = u8

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: u8) -> u8

Performs the `<<` operation. Read more
1.0.0 · source§

### impl Shl<usize> for u8

§

#### type Output = u8

The resulting type after applying the `<<` operator.
source§

#### fn shl(self, other: usize) -> u8

Performs the `<<` operation. Read more
1.22.0 · source§

### impl ShlAssign<&i128> for u8

source§

#### fn shl_assign(&mut self, other: &i128)

Performs the `<<=` operation. Read more
1.22.0 · source§

### impl ShlAssign<&i16> for u8

source§

#### fn shl_assign(&mut self, other: &i16)

Performs the `<<=` operation. Read more
1.22.0 · source§

### impl ShlAssign<&i32> for u8

source§

#### fn shl_assign(&mut self, other: &i32)

Performs the `<<=` operation. Read more
1.22.0 · source§

### impl ShlAssign<&i64> for u8

source§

#### fn shl_assign(&mut self, other: &i64)

Performs the `<<=` operation. Read more
1.22.0 · source§

### impl ShlAssign<&i8> for u8

source§

#### fn shl_assign(&mut self, other: &i8)

Performs the `<<=` operation. Read more
1.22.0 · source§

### impl ShlAssign<&isize> for u8

source§

#### fn shl_assign(&mut self, other: &isize)

Performs the `<<=` operation. Read more
1.22.0 · source§

### impl ShlAssign<&u128> for u8

source§

#### fn shl_assign(&mut self, other: &u128)

Performs the `<<=` operation. Read more
1.22.0 · source§

### impl ShlAssign<&u16> for u8

source§

#### fn shl_assign(&mut self, other: &u16)

Performs the `<<=` operation. Read more
1.22.0 · source§

### impl ShlAssign<&u32> for u8

source§

#### fn shl_assign(&mut self, other: &u32)

Performs the `<<=` operation. Read more
1.22.0 · source§

### impl ShlAssign<&u64> for u8

source§

#### fn shl_assign(&mut self, other: &u64)

Performs the `<<=` operation. Read more
1.22.0 · source§

### impl ShlAssign<&u8> for u8

source§

#### fn shl_assign(&mut self, other: &u8)

Performs the `<<=` operation. Read more
1.22.0 · source§

### impl ShlAssign<&usize> for u8

source§

#### fn shl_assign(&mut self, other: &usize)

Performs the `<<=` operation. Read more
1.8.0 · source§

### impl ShlAssign<i128> for u8

source§

#### fn shl_assign(&mut self, other: i128)

Performs the `<<=` operation. Read more
1.8.0 · source§

### impl ShlAssign<i16> for u8

source§

#### fn shl_assign(&mut self, other: i16)

Performs the `<<=` operation. Read more
1.8.0 · source§

### impl ShlAssign<i32> for u8

source§

#### fn shl_assign(&mut self, other: i32)

Performs the `<<=` operation. Read more
1.8.0 · source§

### impl ShlAssign<i64> for u8

source§

#### fn shl_assign(&mut self, other: i64)

Performs the `<<=` operation. Read more
1.8.0 · source§

### impl ShlAssign<i8> for u8

source§

#### fn shl_assign(&mut self, other: i8)

Performs the `<<=` operation. Read more
1.8.0 · source§

### impl ShlAssign<isize> for u8

source§

#### fn shl_assign(&mut self, other: isize)

Performs the `<<=` operation. Read more
1.8.0 · source§

### impl ShlAssign<u128> for u8

source§

#### fn shl_assign(&mut self, other: u128)

Performs the `<<=` operation. Read more
1.8.0 · source§

### impl ShlAssign<u16> for u8

source§

#### fn shl_assign(&mut self, other: u16)

Performs the `<<=` operation. Read more
1.8.0 · source§

### impl ShlAssign<u32> for u8

source§

#### fn shl_assign(&mut self, other: u32)

Performs the `<<=` operation. Read more
1.8.0 · source§

### impl ShlAssign<u64> for u8

source§

#### fn shl_assign(&mut self, other: u64)

Performs the `<<=` operation. Read more
1.8.0 · source§

### impl ShlAssign<u8> for u8

source§

#### fn shl_assign(&mut self, other: u8)

Performs the `<<=` operation. Read more
1.8.0 · source§

### impl ShlAssign<usize> for u8

source§

#### fn shl_assign(&mut self, other: usize)

Performs the `<<=` operation. Read more
1.0.0 · source§

### impl Shr<&i128> for u8

§

#### type Output = <u8 as Shr<i128>>::Output

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: &i128) -> <u8 as Shr<i128>>::Output

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<&i16> for u8

§

#### type Output = <u8 as Shr<i16>>::Output

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: &i16) -> <u8 as Shr<i16>>::Output

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<&i32> for u8

§

#### type Output = <u8 as Shr<i32>>::Output

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: &i32) -> <u8 as Shr<i32>>::Output

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<&i64> for u8

§

#### type Output = <u8 as Shr<i64>>::Output

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: &i64) -> <u8 as Shr<i64>>::Output

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<&i8> for u8

§

#### type Output = <u8 as Shr<i8>>::Output

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: &i8) -> <u8 as Shr<i8>>::Output

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<&isize> for u8

§

#### type Output = <u8 as Shr<isize>>::Output

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: &isize) -> <u8 as Shr<isize>>::Output

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<&u128> for u8

§

#### type Output = <u8 as Shr<u128>>::Output

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: &u128) -> <u8 as Shr<u128>>::Output

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<&u16> for u8

§

#### type Output = <u8 as Shr<u16>>::Output

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: &u16) -> <u8 as Shr<u16>>::Output

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<&u32> for u8

§

#### type Output = <u8 as Shr<u32>>::Output

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: &u32) -> <u8 as Shr<u32>>::Output

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<&u64> for u8

§

#### type Output = <u8 as Shr<u64>>::Output

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: &u64) -> <u8 as Shr<u64>>::Output

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<&u8> for u8

§

#### type Output = <u8 as Shr<u8>>::Output

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: &u8) -> <u8 as Shr<u8>>::Output

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<&usize> for u8

§

#### type Output = <u8 as Shr<usize>>::Output

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: &usize) -> <u8 as Shr<usize>>::Output

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<i128> for u8

§

#### type Output = u8

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: i128) -> u8

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<i16> for u8

§

#### type Output = u8

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: i16) -> u8

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<i32> for u8

§

#### type Output = u8

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: i32) -> u8

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<i64> for u8

§

#### type Output = u8

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: i64) -> u8

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<i8> for u8

§

#### type Output = u8

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: i8) -> u8

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<isize> for u8

§

#### type Output = u8

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: isize) -> u8

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<u128> for u8

§

#### type Output = u8

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: u128) -> u8

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<u16> for u8

§

#### type Output = u8

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: u16) -> u8

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<u32> for u8

§

#### type Output = u8

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: u32) -> u8

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<u64> for u8

§

#### type Output = u8

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: u64) -> u8

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<u8> for u8

§

#### type Output = u8

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: u8) -> u8

Performs the `>>` operation. Read more
1.0.0 · source§

### impl Shr<usize> for u8

§

#### type Output = u8

The resulting type after applying the `>>` operator.
source§

#### fn shr(self, other: usize) -> u8

Performs the `>>` operation. Read more
1.22.0 · source§

### impl ShrAssign<&i128> for u8

source§

#### fn shr_assign(&mut self, other: &i128)

Performs the `>>=` operation. Read more
1.22.0 · source§

### impl ShrAssign<&i16> for u8

source§

#### fn shr_assign(&mut self, other: &i16)

Performs the `>>=` operation. Read more
1.22.0 · source§

### impl ShrAssign<&i32> for u8

source§

#### fn shr_assign(&mut self, other: &i32)

Performs the `>>=` operation. Read more
1.22.0 · source§

### impl ShrAssign<&i64> for u8

source§

#### fn shr_assign(&mut self, other: &i64)

Performs the `>>=` operation. Read more
1.22.0 · source§

### impl ShrAssign<&i8> for u8

source§

#### fn shr_assign(&mut self, other: &i8)

Performs the `>>=` operation. Read more
1.22.0 · source§

### impl ShrAssign<&isize> for u8

source§

#### fn shr_assign(&mut self, other: &isize)

Performs the `>>=` operation. Read more
1.22.0 · source§

### impl ShrAssign<&u128> for u8

source§

#### fn shr_assign(&mut self, other: &u128)

Performs the `>>=` operation. Read more
1.22.0 · source§

### impl ShrAssign<&u16> for u8

source§

#### fn shr_assign(&mut self, other: &u16)

Performs the `>>=` operation. Read more
1.22.0 · source§

### impl ShrAssign<&u32> for u8

source§

#### fn shr_assign(&mut self, other: &u32)

Performs the `>>=` operation. Read more
1.22.0 · source§

### impl ShrAssign<&u64> for u8

source§

#### fn shr_assign(&mut self, other: &u64)

Performs the `>>=` operation. Read more
1.22.0 · source§

### impl ShrAssign<&u8> for u8

source§

#### fn shr_assign(&mut self, other: &u8)

Performs the `>>=` operation. Read more
1.22.0 · source§

### impl ShrAssign<&usize> for u8

source§

#### fn shr_assign(&mut self, other: &usize)

Performs the `>>=` operation. Read more
1.8.0 · source§

### impl ShrAssign<i128> for u8

source§

#### fn shr_assign(&mut self, other: i128)

Performs the `>>=` operation. Read more
1.8.0 · source§

### impl ShrAssign<i16> for u8

source§

#### fn shr_assign(&mut self, other: i16)

Performs the `>>=` operation. Read more
1.8.0 · source§

### impl ShrAssign<i32> for u8

source§

#### fn shr_assign(&mut self, other: i32)

Performs the `>>=` operation. Read more
1.8.0 · source§

### impl ShrAssign<i64> for u8

source§

#### fn shr_assign(&mut self, other: i64)

Performs the `>>=` operation. Read more
1.8.0 · source§

### impl ShrAssign<i8> for u8

source§

#### fn shr_assign(&mut self, other: i8)

Performs the `>>=` operation. Read more
1.8.0 · source§

### impl ShrAssign<isize> for u8

source§

#### fn shr_assign(&mut self, other: isize)

Performs the `>>=` operation. Read more
1.8.0 · source§

### impl ShrAssign<u128> for u8

source§

#### fn shr_assign(&mut self, other: u128)

Performs the `>>=` operation. Read more
1.8.0 · source§

### impl ShrAssign<u16> for u8

source§

#### fn shr_assign(&mut self, other: u16)

Performs the `>>=` operation. Read more
1.8.0 · source§

### impl ShrAssign<u32> for u8

source§

#### fn shr_assign(&mut self, other: u32)

Performs the `>>=` operation. Read more
1.8.0 · source§

### impl ShrAssign<u64> for u8

source§

#### fn shr_assign(&mut self, other: u64)

Performs the `>>=` operation. Read more
1.8.0 · source§

### impl ShrAssign<u8> for u8

source§

#### fn shr_assign(&mut self, other: u8)

Performs the `>>=` operation. Read more
1.8.0 · source§

### impl ShrAssign<usize> for u8

source§

#### fn shr_assign(&mut self, other: usize)

Performs the `>>=` operation. Read more
source§

### impl SimdElement for u8

§

#### type Mask = i8

🔬This is a nightly-only experimental API. (`portable_simd` #86656)
The mask element type corresponding to this element type.
source§

### impl Step for u8

source§

#### unsafe fn forward_unchecked(start: Self, n: usize) -> Self

🔬This is a nightly-only experimental API. (`step_trait` #42168)
Returns the value that would be obtained by taking the successor of `self` `count` times. Read more
source§

#### unsafe fn backward_unchecked(start: Self, n: usize) -> Self

🔬This is a nightly-only experimental API. (`step_trait` #42168)
Returns the value that would be obtained by taking the predecessor of `self` `count` times. Read more
source§

#### fn forward(start: Self, n: usize) -> Self

🔬This is a nightly-only experimental API. (`step_trait` #42168)
Returns the value that would be obtained by taking the successor of `self` `count` times. Read more
source§

#### fn backward(start: Self, n: usize) -> Self

🔬This is a nightly-only experimental API. (`step_trait` #42168)
Returns the value that would be obtained by taking the predecessor of `self` `count` times. Read more
source§

#### fn steps_between(start: &Self, end: &Self) -> Option<usize>

🔬This is a nightly-only experimental API. (`step_trait` #42168)
Returns the number of successor steps required to get from `start` to `end`. Read more
source§

#### fn forward_checked(start: Self, n: usize) -> Option<Self>

🔬This is a nightly-only experimental API. (`step_trait` #42168)
Returns the value that would be obtained by taking the successor of `self` `count` times. Read more
source§

#### fn backward_checked(start: Self, n: usize) -> Option<Self>

🔬This is a nightly-only experimental API. (`step_trait` #42168)
Returns the value that would be obtained by taking the predecessor of `self` `count` times. Read more
1.0.0 · source§

### impl Sub<&u8> for u8

§

#### type Output = <u8 as Sub<u8>>::Output

The resulting type after applying the `-` operator.
source§

#### fn sub(self, other: &u8) -> <u8 as Sub<u8>>::Output

Performs the `-` operation. Read more
1.0.0 · source§

### impl Sub<u8> for u8

§

#### type Output = u8

The resulting type after applying the `-` operator.
source§

#### fn sub(self, other: u8) -> u8

Performs the `-` operation. Read more
1.22.0 · source§

### impl SubAssign<&u8> for u8

source§

#### fn sub_assign(&mut self, other: &u8)

Performs the `-=` operation. Read more
1.8.0 · source§

### impl SubAssign<u8> for u8

source§

#### fn sub_assign(&mut self, other: u8)

Performs the `-=` operation. Read more
1.12.0 · source§

### impl<'a> Sum<&'a u8> for u8

source§

#### fn sum<I: Iterator<Item = &'a Self>>(iter: I) -> Self

Method which takes an iterator and generates `Self` from the elements by “summing up” the items.
1.12.0 · source§

### impl Sum<u8> for u8

source§

#### fn sum<I: Iterator<Item = Self>>(iter: I) -> Self

Method which takes an iterator and generates `Self` from the elements by “summing up” the items.
1.59.0 · source§

### impl TryFrom<char> for u8

Maps a `char` with code point in U+0000..=U+00FF to a byte in 0x00..=0xFF with same value, failing if the code point is greater than U+00FF.

See `impl From<u8> for char` for details on the encoding.

source§

#### fn try_from(c: char) -> Result<u8, Self::Error>

Tries to convert a `char` into a `u8`.

##### Examples

    let a = 'ÿ'; // U+00FF
    let b = 'Ā'; // U+0100
    assert_eq!(u8::try_from(a), Ok(0xFF_u8));
    assert!(u8::try_from(b).is_err());

Run
§

#### type Error = TryFromCharError

The type returned in the event of a conversion error.
1.34.0 · source§

### impl TryFrom<i128> for u8

source§

#### fn try_from(u: i128) -> Result<Self, Self::Error>

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

§

#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.34.0 · source§

### impl TryFrom<i16> for u8

source§

#### fn try_from(u: i16) -> Result<Self, Self::Error>

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.34.0 · source§

### impl TryFrom<i32> for u8

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#### fn try_from(u: i32) -> Result<Self, Self::Error>

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.34.0 · source§

### impl TryFrom<i64> for u8

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#### fn try_from(u: i64) -> Result<Self, Self::Error>

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.34.0 · source§

### impl TryFrom<i8> for u8

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#### fn try_from(u: i8) -> Result<Self, Self::Error>

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.34.0 · source§

### impl TryFrom<isize> for u8

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#### fn try_from(u: isize) -> Result<Self, Self::Error>

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.34.0 · source§

### impl TryFrom<u128> for u8

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#### fn try_from(u: u128) -> Result<Self, Self::Error>

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.34.0 · source§

### impl TryFrom<u16> for u8

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#### fn try_from(u: u16) -> Result<Self, Self::Error>

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.34.0 · source§

### impl TryFrom<u32> for u8

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#### fn try_from(u: u32) -> Result<Self, Self::Error>

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.34.0 · source§

### impl TryFrom<u64> for u8

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#### fn try_from(u: u64) -> Result<Self, Self::Error>

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.34.0 · source§

### impl TryFrom<usize> for u8

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#### fn try_from(u: usize) -> Result<Self, Self::Error>

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.42.0 · source§

### impl UpperExp for u8

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

Formats the value using the given formatter.
1.0.0 · source§

### impl UpperHex for u8

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

Formats the value using the given formatter.
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### impl ConstParamTy for u8

1.0.0 · source§

### impl Copy for u8

1.0.0 · source§

### impl Eq for u8

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### impl SimdCast for u8

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### impl StructuralEq for u8

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### impl StructuralPartialEq for u8

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### impl TrustedStep for u8