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Primitive Type usize

The pointer-sized unsigned integer type.

The size of this primitive is how many bytes it takes to reference any location in memory. For example, on a 32 bit target, this is 4 bytes and on a 64 bit target, this is 8 bytes.

Implementations

impl usize[src]

pub const MIN: usize[src]1.43.0

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

Examples

Basic usage:

assert_eq!(usize::MIN, 0);

pub const MAX: usize[src]1.43.0

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

Examples

Basic usage:

assert_eq!(usize::MAX, 18446744073709551615);

pub fn from_str_radix(src: &str, radix: u32) -> Result<usize, ParseIntError>[src]

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

pub const fn count_ones(self) -> u32[src]

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

Examples

Basic usage:

let n = 0b01001100usize;

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

pub const fn count_zeros(self) -> u32[src]

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

Examples

Basic usage:

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

pub const fn leading_zeros(self) -> u32[src]

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

Examples

Basic usage:

let n = usize::MAX >> 2;

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

pub const fn trailing_zeros(self) -> u32[src]

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

Examples

Basic usage:

let n = 0b0101000usize;

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

pub const fn leading_ones(self) -> u32[src]1.46.0

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

Examples

Basic usage:

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

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

pub const fn trailing_ones(self) -> u32[src]1.46.0

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

Examples

Basic usage:

let n = 0b1010111usize;

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn rotate_left(self, n: u32) -> usize[src]

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 = 0xaa00000000006e1usize;
let m = 0x6e10aa;

assert_eq!(n.rotate_left(12), m);

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn rotate_right(self, n: u32) -> usize[src]

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 = 0x6e10aausize;
let m = 0xaa00000000006e1;

assert_eq!(n.rotate_right(12), m);

pub const fn swap_bytes(self) -> usize[src]

Reverses the byte order of the integer.

Examples

Basic usage:

let n = 0x1234567890123456usize;
let m = n.swap_bytes();

assert_eq!(m, 0x5634129078563412);

pub const fn reverse_bits(self) -> usize[src]1.37.0

Reverses the bit pattern of the integer.

Examples

Basic usage:

let n = 0x1234567890123456usize;
let m = n.reverse_bits();

assert_eq!(m, 0x6a2c48091e6a2c48);

pub const fn from_be(x: usize) -> usize[src]

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 = 0x1Ausize;

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

pub const fn from_le(x: usize) -> usize[src]

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 = 0x1Ausize;

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

pub const fn to_be(self) -> usize[src]

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 = 0x1Ausize;

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

pub const fn to_le(self) -> usize[src]

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 = 0x1Ausize;

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn checked_add(self, rhs: usize) -> Option<usize>[src]

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

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub unsafe fn unchecked_add(self, rhs: usize) -> usize[src]

🔬 This is a nightly-only experimental API. (unchecked_math)niche optimization path

Unchecked integer addition. Computes self + rhs, assuming overflow cannot occur. This results in undefined behavior when self + rhs > usize::MAX or self + rhs < usize::MIN.

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn checked_sub(self, rhs: usize) -> Option<usize>[src]

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

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub unsafe fn unchecked_sub(self, rhs: usize) -> usize[src]

🔬 This is a nightly-only experimental API. (unchecked_math)niche optimization path

Unchecked integer subtraction. Computes self - rhs, assuming overflow cannot occur. This results in undefined behavior when self - rhs > usize::MAX or self - rhs < usize::MIN.

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn checked_mul(self, rhs: usize) -> Option<usize>[src]

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

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub unsafe fn unchecked_mul(self, rhs: usize) -> usize[src]

🔬 This is a nightly-only experimental API. (unchecked_math)niche optimization path

Unchecked integer multiplication. Computes self * rhs, assuming overflow cannot occur. This results in undefined behavior when self * rhs > usize::MAX or self * rhs < usize::MIN.

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn checked_div(self, rhs: usize) -> Option<usize>[src]

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

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn checked_div_euclid(self, rhs: usize) -> Option<usize>[src]1.38.0

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

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn checked_rem(self, rhs: usize) -> Option<usize>[src]1.7.0

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

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn checked_rem_euclid(self, rhs: usize) -> Option<usize>[src]1.38.0

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

Examples

Basic usage:

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

pub const fn checked_neg(self) -> Option<usize>[src]1.7.0

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

Note that negating any positive integer will overflow.

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn checked_shl(self, rhs: u32) -> Option<usize>[src]1.7.0

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!(0x1usize.checked_shl(4), Some(0x10));
assert_eq!(0x10usize.checked_shl(129), None);

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn checked_shr(self, rhs: u32) -> Option<usize>[src]1.7.0

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!(0x10usize.checked_shr(4), Some(0x1));
assert_eq!(0x10usize.checked_shr(129), None);

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn checked_pow(self, exp: u32) -> Option<usize>[src]1.34.0

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

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn saturating_add(self, rhs: usize) -> usize[src]

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

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn saturating_sub(self, rhs: usize) -> usize[src]

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

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn saturating_mul(self, rhs: usize) -> usize[src]1.7.0

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

Examples

Basic usage:


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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn saturating_pow(self, exp: u32) -> usize[src]1.34.0

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

Examples

Basic usage:


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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn wrapping_add(self, rhs: usize) -> usize[src]

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

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn wrapping_sub(self, rhs: usize) -> usize[src]

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

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn wrapping_mul(self, rhs: usize) -> usize[src]

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);

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn wrapping_div(self, rhs: usize) -> usize[src]1.2.0

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.

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn wrapping_div_euclid(self, rhs: usize) -> usize[src]1.38.0

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).

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn wrapping_rem(self, rhs: usize) -> usize[src]1.2.0

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.

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn wrapping_rem_euclid(self, rhs: usize) -> usize[src]1.38.0

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).

Examples

Basic usage:

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

pub const fn wrapping_neg(self) -> usize[src]1.2.0

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:

Please note that this example is shared between integer types. Which explains why i8 is used here.

assert_eq!(100i8.wrapping_neg(), -100);
assert_eq!((-128i8).wrapping_neg(), -128);

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn wrapping_shl(self, rhs: u32) -> usize[src]1.2.0

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn wrapping_shr(self, rhs: u32) -> usize[src]1.2.0

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn wrapping_pow(self, exp: u32) -> usize[src]1.34.0

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

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn overflowing_add(self, rhs: usize) -> (usize, bool)[src]1.7.0

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn overflowing_sub(self, rhs: usize) -> (usize, bool)[src]1.7.0

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn overflowing_mul(self, rhs: usize) -> (usize, bool)[src]1.7.0

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));

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn overflowing_div(self, rhs: usize) -> (usize, bool)[src]1.7.0

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!(5usize.overflowing_div(2), (2, false));

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn overflowing_div_euclid(self, rhs: usize) -> (usize, bool)[src]1.38.0

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!(5usize.overflowing_div_euclid(2), (2, false));

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn overflowing_rem(self, rhs: usize) -> (usize, bool)[src]1.7.0

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!(5usize.overflowing_rem(2), (1, false));

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn overflowing_rem_euclid(self, rhs: usize) -> (usize, bool)[src]1.38.0

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!(5usize.overflowing_rem_euclid(2), (1, false));

pub const fn overflowing_neg(self) -> (usize, bool)[src]1.7.0

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn overflowing_shl(self, rhs: u32) -> (usize, bool)[src]1.7.0

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!(0x1usize.overflowing_shl(4), (0x10, false));
assert_eq!(0x1usize.overflowing_shl(132), (0x10, true));

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub const fn overflowing_shr(self, rhs: u32) -> (usize, bool)[src]1.7.0

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!(0x10usize.overflowing_shr(4), (0x1, false));
assert_eq!(0x10usize.overflowing_shr(132), (0x1, true));

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn overflowing_pow(self, exp: u32) -> (usize, bool)[src]1.34.0

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn pow(self, exp: u32) -> usize[src]

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

Examples

Basic usage:

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn div_euclid(self, rhs: usize) -> usize[src]1.38.0

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

#[must_use = "this returns the result of the operation, \ without modifying the original"]pub fn rem_euclid(self, rhs: usize) -> usize[src]1.38.0

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

pub const fn is_power_of_two(self) -> bool[src]

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

Examples

Basic usage:

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

pub fn next_power_of_two(self) -> usize[src]

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 return value is wrapped to 0 in release mode (the only situation in which method can return 0).

Examples

Basic usage:

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

pub fn checked_next_power_of_two(self) -> Option<usize>[src]

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

pub fn wrapping_next_power_of_two(self) -> usize[src]

🔬 This is a nightly-only experimental API. (wrapping_next_power_of_two #32463)needs decision on wrapping behaviour

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

pub const fn to_be_bytes(self) -> [u8; 8][src]1.32.0

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

Note: This function returns an array of length 2, 4 or 8 bytes depending on the target pointer size.

Examples

let bytes = 0x1234567890123456usize.to_be_bytes();
assert_eq!(bytes, [0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]);

pub const fn to_le_bytes(self) -> [u8; 8][src]1.32.0

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

Note: This function returns an array of length 2, 4 or 8 bytes depending on the target pointer size.

Examples

let bytes = 0x1234567890123456usize.to_le_bytes();
assert_eq!(bytes, [0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]);

pub const fn to_ne_bytes(self) -> [u8; 8][src]1.32.0

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.

Note: This function returns an array of length 2, 4 or 8 bytes depending on the target pointer size.

Examples

let bytes = 0x1234567890123456usize.to_ne_bytes();
assert_eq!(
    bytes,
    if cfg!(target_endian = "big") {
        [0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]
    } else {
        [0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]
    }
);

pub const fn from_be_bytes(bytes: [u8; 8]) -> usize[src]1.32.0

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

Note: This function takes an array of length 2, 4 or 8 bytes depending on the target pointer size.

Examples

let value = usize::from_be_bytes([0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]);
assert_eq!(value, 0x1234567890123456);

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

use std::convert::TryInto;

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

pub const fn from_le_bytes(bytes: [u8; 8]) -> usize[src]1.32.0

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

Note: This function takes an array of length 2, 4 or 8 bytes depending on the target pointer size.

Examples

let value = usize::from_le_bytes([0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]);
assert_eq!(value, 0x1234567890123456);

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

use std::convert::TryInto;

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

pub const fn from_ne_bytes(bytes: [u8; 8]) -> usize[src]1.32.0

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.

Note: This function takes an array of length 2, 4 or 8 bytes depending on the target pointer size.

Examples

let value = usize::from_ne_bytes(if cfg!(target_endian = "big") {
    [0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]
} else {
    [0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]
});
assert_eq!(value, 0x1234567890123456);

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

use std::convert::TryInto;

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

pub const fn min_value() -> usize[src]

This method is soft-deprecated.

Although using it won’t cause compilation warning, new code should use usize::MIN instead.

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

pub const fn max_value() -> usize[src]

This method is soft-deprecated.

Although using it won’t cause compilation warning, new code should use usize::MAX instead.

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

Trait Implementations

impl<'_, '_> Add<&'_ usize> for &'_ usize[src]

type Output = <usize as Add<usize>>::Output

The resulting type after applying the + operator.

impl<'_> Add<&'_ usize> for usize[src]

type Output = <usize as Add<usize>>::Output

The resulting type after applying the + operator.

impl<'a> Add<usize> for &'a usize[src]

type Output = <usize as Add<usize>>::Output

The resulting type after applying the + operator.

impl Add<usize> for usize[src]

type Output = usize

The resulting type after applying the + operator.

impl<'_> AddAssign<&'_ usize> for usize[src]1.22.0

impl AddAssign<usize> for usize[src]1.8.0

impl Binary for usize[src]

impl<'_, '_> BitAnd<&'_ usize> for &'_ usize[src]

type Output = <usize as BitAnd<usize>>::Output

The resulting type after applying the & operator.

impl<'_> BitAnd<&'_ usize> for usize[src]

type Output = <usize as BitAnd<usize>>::Output

The resulting type after applying the & operator.

impl BitAnd<usize> for usize[src]

type Output = usize

The resulting type after applying the & operator.

impl<'a> BitAnd<usize> for &'a usize[src]

type Output = <usize as BitAnd<usize>>::Output

The resulting type after applying the & operator.

impl<'_> BitAndAssign<&'_ usize> for usize[src]1.22.0

impl BitAndAssign<usize> for usize[src]1.8.0

impl<'_, '_> BitOr<&'_ usize> for &'_ usize[src]

type Output = <usize as BitOr<usize>>::Output

The resulting type after applying the | operator.

impl<'_> BitOr<&'_ usize> for usize[src]

type Output = <usize as BitOr<usize>>::Output

The resulting type after applying the | operator.

impl BitOr<NonZeroUsize> for usize[src]1.45.0

type Output = NonZeroUsize

The resulting type after applying the | operator.

impl<'a> BitOr<usize> for &'a usize[src]

type Output = <usize as BitOr<usize>>::Output

The resulting type after applying the | operator.

impl BitOr<usize> for usize[src]

type Output = usize

The resulting type after applying the | operator.

impl<'_> BitOrAssign<&'_ usize> for usize[src]1.22.0

impl BitOrAssign<usize> for usize[src]1.8.0

impl<'_, '_> BitXor<&'_ usize> for &'_ usize[src]

type Output = <usize as BitXor<usize>>::Output

The resulting type after applying the ^ operator.

impl<'_> BitXor<&'_ usize> for usize[src]

type Output = <usize as BitXor<usize>>::Output

The resulting type after applying the ^ operator.

impl<'a> BitXor<usize> for &'a usize[src]

type Output = <usize as BitXor<usize>>::Output

The resulting type after applying the ^ operator.

impl BitXor<usize> for usize[src]

type Output = usize

The resulting type after applying the ^ operator.

impl<'_> BitXorAssign<&'_ usize> for usize[src]1.22.0

impl BitXorAssign<usize> for usize[src]1.8.0

impl Clone for usize[src]

impl Copy for usize[src]

impl Debug for usize[src]

impl Default for usize[src]

fn default() -> usize[src]

Returns the default value of 0

impl Display for usize[src]

impl<'_, '_> Div<&'_ usize> for &'_ usize[src]

type Output = <usize as Div<usize>>::Output

The resulting type after applying the / operator.

impl<'_> Div<&'_ usize> for usize[src]

type Output = <usize as Div<usize>>::Output

The resulting type after applying the / operator.

impl<'a> Div<usize> for &'a usize[src]

type Output = <usize as Div<usize>>::Output

The resulting type after applying the / operator.

impl Div<usize> for usize[src]

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

type Output = usize

The resulting type after applying the / operator.

impl<'_> DivAssign<&'_ usize> for usize[src]1.22.0

impl DivAssign<usize> for usize[src]1.8.0

impl Eq for usize[src]

impl From<NonZeroUsize> for usize[src]1.31.0

fn from(nonzero: NonZeroUsize) -> usize[src]

Converts a NonZeroUsize into an usize

impl From<bool> for usize[src]1.28.0

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

Examples

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

impl From<u16> for usize[src]1.26.0

Converts u16 to usize losslessly.

impl From<u8> for usize[src]1.5.0

Converts u8 to usize losslessly.

impl FromStr for usize[src]

type Err = ParseIntError

The associated error which can be returned from parsing.

impl Hash for usize[src]

impl LowerExp for usize[src]1.42.0

impl LowerHex for usize[src]

impl<'_, '_> Mul<&'_ usize> for &'_ usize[src]

type Output = <usize as Mul<usize>>::Output

The resulting type after applying the * operator.

impl<'_> Mul<&'_ usize> for usize[src]

type Output = <usize as Mul<usize>>::Output

The resulting type after applying the * operator.

impl<'a> Mul<usize> for &'a usize[src]

type Output = <usize as Mul<usize>>::Output

The resulting type after applying the * operator.

impl Mul<usize> for usize[src]

type Output = usize

The resulting type after applying the * operator.

impl<'_> MulAssign<&'_ usize> for usize[src]1.22.0

impl MulAssign<usize> for usize[src]1.8.0

impl<'_> Not for &'_ usize[src]

type Output = <usize as Not>::Output

The resulting type after applying the ! operator.

impl Not for usize[src]

type Output = usize

The resulting type after applying the ! operator.

impl Octal for usize[src]

impl Ord for usize[src]

impl PartialEq<usize> for usize[src]

impl PartialOrd<usize> for usize[src]

impl<'a> Product<&'a usize> for usize[src]1.12.0

impl Product<usize> for usize[src]1.12.0

impl<'_, '_> Rem<&'_ usize> for &'_ usize[src]

type Output = <usize as Rem<usize>>::Output

The resulting type after applying the % operator.

impl<'_> Rem<&'_ usize> for usize[src]

type Output = <usize as Rem<usize>>::Output

The resulting type after applying the % operator.

impl<'a> Rem<usize> for &'a usize[src]

type Output = <usize as Rem<usize>>::Output

The resulting type after applying the % operator.

impl Rem<usize> for usize[src]

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

type Output = usize

The resulting type after applying the % operator.

impl<'_> RemAssign<&'_ usize> for usize[src]1.22.0

impl RemAssign<usize> for usize[src]1.8.0

impl<'_, '_> Shl<&'_ i128> for &'_ usize[src]

type Output = <usize as Shl<i128>>::Output

The resulting type after applying the << operator.

impl<'_> Shl<&'_ i128> for usize[src]

type Output = <usize as Shl<i128>>::Output

The resulting type after applying the << operator.

impl<'_> Shl<&'_ i16> for usize[src]

type Output = <usize as Shl<i16>>::Output

The resulting type after applying the << operator.

impl<'_, '_> Shl<&'_ i16> for &'_ usize[src]

type Output = <usize as Shl<i16>>::Output

The resulting type after applying the << operator.

impl<'_, '_> Shl<&'_ i32> for &'_ usize[src]

type Output = <usize as Shl<i32>>::Output

The resulting type after applying the << operator.

impl<'_> Shl<&'_ i32> for usize[src]

type Output = <usize as Shl<i32>>::Output

The resulting type after applying the << operator.

impl<'_, '_> Shl<&'_ i64> for &'_ usize[src]

type Output = <usize as Shl<i64>>::Output

The resulting type after applying the << operator.

impl<'_> Shl<&'_ i64> for usize[src]

type Output = <usize as Shl<i64>>::Output

The resulting type after applying the << operator.

impl<'_> Shl<&'_ i8> for usize[src]

type Output = <usize as Shl<i8>>::Output

The resulting type after applying the << operator.

impl<'_, '_> Shl<&'_ i8> for &'_ usize[src]

type Output = <usize as Shl<i8>>::Output

The resulting type after applying the << operator.

impl<'_, '_> Shl<&'_ isize> for &'_ usize[src]

type Output = <usize as Shl<isize>>::Output

The resulting type after applying the << operator.

impl<'_> Shl<&'_ isize> for usize[src]

type Output = <usize as Shl<isize>>::Output

The resulting type after applying the << operator.

impl<'_, '_> Shl<&'_ u128> for &'_ usize[src]

type Output = <usize as Shl<u128>>::Output

The resulting type after applying the << operator.

impl<'_> Shl<&'_ u128> for usize[src]

type Output = <usize as Shl<u128>>::Output

The resulting type after applying the << operator.

impl<'_, '_> Shl<&'_ u16> for &'_ usize[src]

type Output = <usize as Shl<u16>>::Output

The resulting type after applying the << operator.

impl<'_> Shl<&'_ u16> for usize[src]

type Output = <usize as Shl<u16>>::Output

The resulting type after applying the << operator.

impl<'_> Shl<&'_ u32> for usize[src]

type Output = <usize as Shl<u32>>::Output

The resulting type after applying the << operator.

impl<'_, '_> Shl<&'_ u32> for &'_ usize[src]

type Output = <usize as Shl<u32>>::Output

The resulting type after applying the << operator.

impl<'_> Shl<&'_ u64> for usize[src]

type Output = <usize as Shl<u64>>::Output

The resulting type after applying the << operator.

impl<'_, '_> Shl<&'_ u64> for &'_ usize[src]

type Output = <usize as Shl<u64>>::Output

The resulting type after applying the << operator.

impl<'_> Shl<&'_ u8> for usize[src]

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

The resulting type after applying the << operator.

impl<'_, '_> Shl<&'_ u8> for &'_ usize[src]

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

The resulting type after applying the << operator.

impl<'_, '_> Shl<&'_ usize> for &'_ usize[src]

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

The resulting type after applying the << operator.

impl<'_> Shl<&'_ usize> for usize[src]

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

The resulting type after applying the << operator.

impl Shl<i128> for usize[src]

type Output = usize

The resulting type after applying the << operator.

impl<'a> Shl<i128> for &'a usize[src]

type Output = <usize as Shl<i128>>::Output

The resulting type after applying the << operator.

impl Shl<i16> for usize[src]

type Output = usize

The resulting type after applying the << operator.

impl<'a> Shl<i16> for &'a usize[src]

type Output = <usize as Shl<i16>>::Output

The resulting type after applying the << operator.

impl Shl<i32> for usize[src]

type Output = usize

The resulting type after applying the << operator.

impl<'a> Shl<i32> for &'a usize[src]

type Output = <usize as Shl<i32>>::Output

The resulting type after applying the << operator.

impl Shl<i64> for usize[src]

type Output = usize

The resulting type after applying the << operator.

impl<'a> Shl<i64> for &'a usize[src]

type Output = <usize as Shl<i64>>::Output

The resulting type after applying the << operator.

impl<'a> Shl<i8> for &'a usize[src]

type Output = <usize as Shl<i8>>::Output

The resulting type after applying the << operator.

impl Shl<i8> for usize[src]

type Output = usize

The resulting type after applying the << operator.

impl Shl<isize> for usize[src]

type Output = usize

The resulting type after applying the << operator.

impl<'a> Shl<isize> for &'a usize[src]

type Output = <usize as Shl<isize>>::Output

The resulting type after applying the << operator.

impl<'a> Shl<u128> for &'a usize[src]

type Output = <usize as Shl<u128>>::Output

The resulting type after applying the << operator.

impl Shl<u128> for usize[src]

type Output = usize

The resulting type after applying the << operator.

impl Shl<u16> for usize[src]

type Output = usize

The resulting type after applying the << operator.

impl<'a> Shl<u16> for &'a usize[src]

type Output = <usize as Shl<u16>>::Output

The resulting type after applying the << operator.

impl<'a> Shl<u32> for &'a usize[src]

type Output = <usize as Shl<u32>>::Output

The resulting type after applying the << operator.

impl Shl<u32> for usize[src]

type Output = usize

The resulting type after applying the << operator.

impl Shl<u64> for usize[src]

type Output = usize

The resulting type after applying the << operator.

impl<'a> Shl<u64> for &'a usize[src]

type Output = <usize as Shl<u64>>::Output

The resulting type after applying the << operator.

impl<'a> Shl<u8> for &'a usize[src]

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

The resulting type after applying the << operator.

impl Shl<u8> for usize[src]

type Output = usize

The resulting type after applying the << operator.

impl<'a> Shl<usize> for &'a usize[src]

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

The resulting type after applying the << operator.

impl Shl<usize> for usize[src]

type Output = usize

The resulting type after applying the << operator.

impl<'_> ShlAssign<&'_ i128> for usize[src]1.22.0

impl<'_> ShlAssign<&'_ i16> for usize[src]1.22.0

impl<'_> ShlAssign<&'_ i32> for usize[src]1.22.0

impl<'_> ShlAssign<&'_ i64> for usize[src]1.22.0

impl<'_> ShlAssign<&'_ i8> for usize[src]1.22.0

impl<'_> ShlAssign<&'_ isize> for usize[src]1.22.0

impl<'_> ShlAssign<&'_ u128> for usize[src]1.22.0

impl<'_> ShlAssign<&'_ u16> for usize[src]1.22.0

impl<'_> ShlAssign<&'_ u32> for usize[src]1.22.0

impl<'_> ShlAssign<&'_ u64> for usize[src]1.22.0

impl<'_> ShlAssign<&'_ u8> for usize[src]1.22.0

impl<'_> ShlAssign<&'_ usize> for usize[src]1.22.0

impl ShlAssign<i128> for usize[src]1.8.0

impl ShlAssign<i16> for usize[src]1.8.0

impl ShlAssign<i32> for usize[src]1.8.0

impl ShlAssign<i64> for usize[src]1.8.0

impl ShlAssign<i8> for usize[src]1.8.0

impl ShlAssign<isize> for usize[src]1.8.0

impl ShlAssign<u128> for usize[src]1.8.0

impl ShlAssign<u16> for usize[src]1.8.0

impl ShlAssign<u32> for usize[src]1.8.0

impl ShlAssign<u64> for usize[src]1.8.0

impl ShlAssign<u8> for usize[src]1.8.0

impl ShlAssign<usize> for usize[src]1.8.0

impl<'_> Shr<&'_ i128> for usize[src]

type Output = <usize as Shr<i128>>::Output

The resulting type after applying the >> operator.

impl<'_, '_> Shr<&'_ i128> for &'_ usize[src]

type Output = <usize as Shr<i128>>::Output

The resulting type after applying the >> operator.

impl<'_, '_> Shr<&'_ i16> for &'_ usize[src]

type Output = <usize as Shr<i16>>::Output

The resulting type after applying the >> operator.

impl<'_> Shr<&'_ i16> for usize[src]

type Output = <usize as Shr<i16>>::Output

The resulting type after applying the >> operator.

impl<'_> Shr<&'_ i32> for usize[src]

type Output = <usize as Shr<i32>>::Output

The resulting type after applying the >> operator.

impl<'_, '_> Shr<&'_ i32> for &'_ usize[src]

type Output = <usize as Shr<i32>>::Output

The resulting type after applying the >> operator.

impl<'_> Shr<&'_ i64> for usize[src]

type Output = <usize as Shr<i64>>::Output

The resulting type after applying the >> operator.

impl<'_, '_> Shr<&'_ i64> for &'_ usize[src]

type Output = <usize as Shr<i64>>::Output

The resulting type after applying the >> operator.

impl<'_> Shr<&'_ i8> for usize[src]

type Output = <usize as Shr<i8>>::Output

The resulting type after applying the >> operator.

impl<'_, '_> Shr<&'_ i8> for &'_ usize[src]

type Output = <usize as Shr<i8>>::Output

The resulting type after applying the >> operator.

impl<'_, '_> Shr<&'_ isize> for &'_ usize[src]

type Output = <usize as Shr<isize>>::Output

The resulting type after applying the >> operator.

impl<'_> Shr<&'_ isize> for usize[src]

type Output = <usize as Shr<isize>>::Output

The resulting type after applying the >> operator.

impl<'_> Shr<&'_ u128> for usize[src]

type Output = <usize as Shr<u128>>::Output

The resulting type after applying the >> operator.

impl<'_, '_> Shr<&'_ u128> for &'_ usize[src]

type Output = <usize as Shr<u128>>::Output

The resulting type after applying the >> operator.

impl<'_> Shr<&'_ u16> for usize[src]

type Output = <usize as Shr<u16>>::Output

The resulting type after applying the >> operator.

impl<'_, '_> Shr<&'_ u16> for &'_ usize[src]

type Output = <usize as Shr<u16>>::Output

The resulting type after applying the >> operator.

impl<'_, '_> Shr<&'_ u32> for &'_ usize[src]

type Output = <usize as Shr<u32>>::Output

The resulting type after applying the >> operator.

impl<'_> Shr<&'_ u32> for usize[src]

type Output = <usize as Shr<u32>>::Output

The resulting type after applying the >> operator.

impl<'_> Shr<&'_ u64> for usize[src]

type Output = <usize as Shr<u64>>::Output

The resulting type after applying the >> operator.

impl<'_, '_> Shr<&'_ u64> for &'_ usize[src]

type Output = <usize as Shr<u64>>::Output

The resulting type after applying the >> operator.

impl<'_> Shr<&'_ u8> for usize[src]

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

The resulting type after applying the >> operator.

impl<'_, '_> Shr<&'_ u8> for &'_ usize[src]

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

The resulting type after applying the >> operator.

impl<'_> Shr<&'_ usize> for usize[src]

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

The resulting type after applying the >> operator.

impl<'_, '_> Shr<&'_ usize> for &'_ usize[src]

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

The resulting type after applying the >> operator.

impl Shr<i128> for usize[src]

type Output = usize

The resulting type after applying the >> operator.

impl<'a> Shr<i128> for &'a usize[src]

type Output = <usize as Shr<i128>>::Output

The resulting type after applying the >> operator.

impl<'a> Shr<i16> for &'a usize[src]

type Output = <usize as Shr<i16>>::Output

The resulting type after applying the >> operator.

impl Shr<i16> for usize[src]

type Output = usize

The resulting type after applying the >> operator.

impl Shr<i32> for usize[src]

type Output = usize

The resulting type after applying the >> operator.

impl<'a> Shr<i32> for &'a usize[src]

type Output = <usize as Shr<i32>>::Output

The resulting type after applying the >> operator.

impl<'a> Shr<i64> for &'a usize[src]

type Output = <usize as Shr<i64>>::Output

The resulting type after applying the >> operator.

impl Shr<i64> for usize[src]

type Output = usize

The resulting type after applying the >> operator.

impl Shr<i8> for usize[src]

type Output = usize

The resulting type after applying the >> operator.

impl<'a> Shr<i8> for &'a usize[src]

type Output = <usize as Shr<i8>>::Output

The resulting type after applying the >> operator.

impl Shr<isize> for usize[src]

type Output = usize

The resulting type after applying the >> operator.

impl<'a> Shr<isize> for &'a usize[src]

type Output = <usize as Shr<isize>>::Output

The resulting type after applying the >> operator.

impl Shr<u128> for usize[src]

type Output = usize

The resulting type after applying the >> operator.

impl<'a> Shr<u128> for &'a usize[src]

type Output = <usize as Shr<u128>>::Output

The resulting type after applying the >> operator.

impl Shr<u16> for usize[src]

type Output = usize

The resulting type after applying the >> operator.

impl<'a> Shr<u16> for &'a usize[src]

type Output = <usize as Shr<u16>>::Output

The resulting type after applying the >> operator.

impl Shr<u32> for usize[src]

type Output = usize

The resulting type after applying the >> operator.

impl<'a> Shr<u32> for &'a usize[src]

type Output = <usize as Shr<u32>>::Output

The resulting type after applying the >> operator.

impl Shr<u64> for usize[src]

type Output = usize

The resulting type after applying the >> operator.

impl<'a> Shr<u64> for &'a usize[src]

type Output = <usize as Shr<u64>>::Output

The resulting type after applying the >> operator.

impl Shr<u8> for usize[src]

type Output = usize

The resulting type after applying the >> operator.

impl<'a> Shr<u8> for &'a usize[src]

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

The resulting type after applying the >> operator.

impl Shr<usize> for usize[src]

type Output = usize

The resulting type after applying the >> operator.

impl<'a> Shr<usize> for &'a usize[src]

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

The resulting type after applying the >> operator.

impl<'_> ShrAssign<&'_ i128> for usize[src]1.22.0

impl<'_> ShrAssign<&'_ i16> for usize[src]1.22.0

impl<'_> ShrAssign<&'_ i32> for usize[src]1.22.0

impl<'_> ShrAssign<&'_ i64> for usize[src]1.22.0

impl<'_> ShrAssign<&'_ i8> for usize[src]1.22.0

impl<'_> ShrAssign<&'_ isize> for usize[src]1.22.0

impl<'_> ShrAssign<&'_ u128> for usize[src]1.22.0

impl<'_> ShrAssign<&'_ u16> for usize[src]1.22.0

impl<'_> ShrAssign<&'_ u32> for usize[src]1.22.0

impl<'_> ShrAssign<&'_ u64> for usize[src]1.22.0

impl<'_> ShrAssign<&'_ u8> for usize[src]1.22.0

impl<'_> ShrAssign<&'_ usize> for usize[src]1.22.0

impl ShrAssign<i128> for usize[src]1.8.0

impl ShrAssign<i16> for usize[src]1.8.0

impl ShrAssign<i32> for usize[src]1.8.0

impl ShrAssign<i64> for usize[src]1.8.0

impl ShrAssign<i8> for usize[src]1.8.0

impl ShrAssign<isize> for usize[src]1.8.0

impl ShrAssign<u128> for usize[src]1.8.0

impl ShrAssign<u16> for usize[src]1.8.0

impl ShrAssign<u32> for usize[src]1.8.0

impl ShrAssign<u64> for usize[src]1.8.0

impl ShrAssign<u8> for usize[src]1.8.0

impl ShrAssign<usize> for usize[src]1.8.0

impl<T> SliceIndex<[T]> for usize[src]1.15.0

type Output = T

The output type returned by methods.

impl Step for usize[src]

impl<'_> Sub<&'_ usize> for usize[src]

type Output = <usize as Sub<usize>>::Output

The resulting type after applying the - operator.

impl<'_, '_> Sub<&'_ usize> for &'_ usize[src]

type Output = <usize as Sub<usize>>::Output

The resulting type after applying the - operator.

impl Sub<usize> for usize[src]

type Output = usize

The resulting type after applying the - operator.

impl<'a> Sub<usize> for &'a usize[src]

type Output = <usize as Sub<usize>>::Output

The resulting type after applying the - operator.

impl<'_> SubAssign<&'_ usize> for usize[src]1.22.0

impl SubAssign<usize> for usize[src]1.8.0

impl<'a> Sum<&'a usize> for usize[src]1.12.0

impl Sum<usize> for usize[src]1.12.0

impl TryFrom<i128> for usize[src]1.34.0

type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(u: i128) -> Result<usize, <usize as TryFrom<i128>>::Error>[src]

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.

impl TryFrom<i16> for usize[src]1.34.0

type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(u: i16) -> Result<usize, <usize as TryFrom<i16>>::Error>[src]

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.

impl TryFrom<i32> for usize[src]1.34.0

type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(u: i32) -> Result<usize, <usize as TryFrom<i32>>::Error>[src]

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.

impl TryFrom<i64> for usize[src]1.34.0

type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(u: i64) -> Result<usize, <usize as TryFrom<i64>>::Error>[src]

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.

impl TryFrom<i8> for usize[src]1.34.0

type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(u: i8) -> Result<usize, <usize as TryFrom<i8>>::Error>[src]

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.

impl TryFrom<isize> for usize[src]1.34.0

type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(u: isize) -> Result<usize, <usize as TryFrom<isize>>::Error>[src]

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.

impl TryFrom<u128> for usize[src]1.34.0

type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(u: u128) -> Result<usize, <usize as TryFrom<u128>>::Error>[src]

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.

impl TryFrom<u32> for usize[src]1.34.0

type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(value: u32) -> Result<usize, <usize as TryFrom<u32>>::Error>[src]

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.

impl TryFrom<u64> for usize[src]1.34.0

type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(value: u64) -> Result<usize, <usize as TryFrom<u64>>::Error>[src]

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.

impl UpperExp for usize[src]1.42.0

impl UpperHex for usize[src]

Auto Trait Implementations

impl RefUnwindSafe for usize

impl Send for usize

impl Sync for usize

impl Unpin for usize

impl UnwindSafe for usize

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized, 
[src]

impl<T> Borrow<T> for T where
    T: ?Sized, 
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized, 
[src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T> ToOwned for T where
    T: Clone, 
[src]

type Owned = T

The resulting type after obtaining ownership.

impl<T> ToString for T where
    T: Display + ?Sized, 
[src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

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

The type returned in the event of a conversion error.

© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/primitive.usize.html