# 1.0.0[−]Primitive Type usize

The pointer-sized unsigned integer type.

*See also the std::usize module.*

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.

## Methods

`impl usize`

[src]

`pub const fn min_value() -> usize`

[src]

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

# Examples

Basic usage:

assert_eq!(usize::min_value(), 0);Run

`pub const fn max_value() -> usize`

[src]

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

# Examples

Basic usage:

assert_eq!(usize::max_value(), 18446744073709551615);Run

`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));Run

`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);Run

`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_value().count_zeros(), 0);Run

`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_value() >> 2; assert_eq!(n.leading_zeros(), 2);Run

`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);Run

`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);Run

`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);Run

`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);Run

`pub fn reverse_bits(self) -> usize`

[src]

Reverses the bit pattern of the integer.

# Examples

Basic usage:

#![feature(reverse_bits)] let n = 0x1234567890123456usize; let m = n.reverse_bits(); assert_eq!(m, 0x6a2c48091e6a2c48);Run

`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()) }Run

`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()) }Run

`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()) }Run

`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()) }Run

`pub 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_value() - 2).checked_add(1), Some(usize::max_value() - 1)); assert_eq!((usize::max_value() - 2).checked_add(3), None);Run

`pub 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);Run

`pub 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_value().checked_mul(2), None);Run

`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);Run

`pub fn checked_div_euclid(self, rhs: usize) -> Option<usize>`

[src]

Checked Euclidean division. Computes `self.div_euclid(rhs)`

, returning `None`

if `rhs == 0`

.

# Examples

Basic usage:

#![feature(euclidean_division)] assert_eq!(128usize.checked_div_euclid(2), Some(64)); assert_eq!(1usize.checked_div_euclid(0), None);Run

`pub fn checked_rem(self, rhs: usize) -> Option<usize>`

1.7.0[src]

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);Run

`pub fn checked_rem_euclid(self, rhs: usize) -> Option<usize>`

[src]

Checked Euclidean modulo. Computes `self.rem_euclid(rhs)`

, returning `None`

if `rhs == 0`

.

# Examples

Basic usage:

#![feature(euclidean_division)] assert_eq!(5usize.checked_rem_euclid(2), Some(1)); assert_eq!(5usize.checked_rem_euclid(0), None);Run

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

1.7.0[src]

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);Run

`pub fn checked_shl(self, rhs: u32) -> Option<usize>`

1.7.0[src]

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);Run

`pub fn checked_shr(self, rhs: u32) -> Option<usize>`

1.7.0[src]

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);Run

`pub fn checked_pow(self, exp: u32) -> Option<usize>`

1.34.0[src]

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_value().checked_pow(2), None);Run

`pub 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!(200u8.saturating_add(127), 255);Run

`pub 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);Run

`pub fn saturating_mul(self, rhs: usize) -> usize`

1.7.0[src]

Saturating integer multiplication. Computes `self * rhs`

,
saturating at the numeric bounds instead of overflowing.

# Examples

Basic usage:

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

`pub fn saturating_pow(self, exp: u32) -> usize`

1.34.0[src]

Saturating integer exponentiation. Computes `self.pow(exp)`

,
saturating at the numeric bounds instead of overflowing.

# Examples

Basic usage:

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

`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_value()), 199);Run

`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_value()), 101);Run

`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);Run

`pub fn wrapping_div(self, rhs: usize) -> usize`

1.2.0[src]

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);Run

`pub fn wrapping_div_euclid(self, rhs: usize) -> usize`

[src]

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:

#![feature(euclidean_division)] assert_eq!(100usize.wrapping_div_euclid(10), 10);Run

`pub fn wrapping_rem(self, rhs: usize) -> usize`

1.2.0[src]

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);Run

`pub fn wrapping_rem_euclid(self, rhs: usize) -> usize`

[src]

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:

#![feature(euclidean_division)] assert_eq!(100usize.wrapping_rem_euclid(10), 0);Run

`pub const fn wrapping_neg(self) -> usize`

1.2.0[src]

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);Run

`pub const fn wrapping_shl(self, rhs: u32) -> usize`

1.2.0[src]

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);Run

`pub const fn wrapping_shr(self, rhs: u32) -> usize`

1.2.0[src]

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);Run

`pub fn wrapping_pow(self, exp: u32) -> usize`

1.34.0[src]

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);Run

`pub const fn overflowing_add(self, rhs: usize) -> (usize, bool)`

1.7.0[src]

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

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

`pub const fn overflowing_sub(self, rhs: usize) -> (usize, bool)`

1.7.0[src]

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

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

`pub const fn overflowing_mul(self, rhs: usize) -> (usize, bool)`

1.7.0[src]

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

`pub fn overflowing_div(self, rhs: usize) -> (usize, bool)`

1.7.0[src]

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));Run

`pub fn overflowing_div_euclid(self, rhs: usize) -> (usize, bool)`

[src]

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

#![feature(euclidean_division)] assert_eq!(5usize.overflowing_div_euclid(2), (2, false));Run

`pub fn overflowing_rem(self, rhs: usize) -> (usize, bool)`

1.7.0[src]

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));Run

`pub fn overflowing_rem_euclid(self, rhs: usize) -> (usize, bool)`

[src]

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

#![feature(euclidean_division)] assert_eq!(5usize.overflowing_rem_euclid(2), (1, false));Run

`pub const fn overflowing_neg(self) -> (usize, bool)`

1.7.0[src]

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));Run

`pub const fn overflowing_shl(self, rhs: u32) -> (usize, bool)`

1.7.0[src]

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));Run

`pub const fn overflowing_shr(self, rhs: u32) -> (usize, bool)`

1.7.0[src]

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));Run

`pub fn overflowing_pow(self, exp: u32) -> (usize, bool)`

1.34.0[src]

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));Run

`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);Run

`pub fn div_euclid(self, rhs: usize) -> usize`

[src]

Performs Euclidean division.

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

.

# Examples

Basic usage:

#![feature(euclidean_division)] assert_eq!(7usize.div_euclid(4), 1); // or any other integer typeRun

`pub fn rem_euclid(self, rhs: usize) -> usize`

[src]

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`

.

# Examples

Basic usage:

#![feature(euclidean_division)] assert_eq!(7usize.rem_euclid(4), 3); // or any other integer typeRun

`pub 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());Run

`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);Run

`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_value().checked_next_power_of_two(), None);Run

`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_value().wrapping_next_power_of_two(), 0);Run

`pub fn to_be_bytes(self) -> [u8; 8]`

1.32.0[src]

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

# Examples

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

`pub fn to_le_bytes(self) -> [u8; 8]`

1.32.0[src]

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

# Examples

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

`pub fn to_ne_bytes(self) -> [u8; 8]`

1.32.0[src]

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 = 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] });Run

`pub fn from_be_bytes(bytes: [u8; 8]) -> usize`

1.32.0[src]

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

# Examples

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

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()) }Run

`pub fn from_le_bytes(bytes: [u8; 8]) -> usize`

1.32.0[src]

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

# Examples

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

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()) }Run

`pub fn from_ne_bytes(bytes: [u8; 8]) -> usize`

1.32.0[src]

Create an 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 = 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);Run

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()) }Run

## Trait Implementations

`impl TryFrom<i128> for usize`

1.34.0[src]

`type Error = TryFromIntError`

The type returned in the event of a conversion error.

`fn try_from(u: i128) -> Result<usize, TryFromIntError>`

[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`

1.34.0[src]

`type Error = TryFromIntError`

The type returned in the event of a conversion error.

`fn try_from(u: i64) -> Result<usize, TryFromIntError>`

[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`

1.34.0[src]

`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<i32> for usize`

1.34.0[src]

`type Error = TryFromIntError`

The type returned in the event of a conversion error.

`fn try_from(u: i32) -> Result<usize, TryFromIntError>`

[src]

`impl TryFrom<isize> for usize`

1.34.0[src]

`type Error = TryFromIntError`

The type returned in the event of a conversion error.

`fn try_from(u: isize) -> Result<usize, TryFromIntError>`

[src]

`impl TryFrom<i8> for usize`

1.34.0[src]

`type Error = TryFromIntError`

The type returned in the event of a conversion error.

`fn try_from(u: i8) -> Result<usize, TryFromIntError>`

[src]

`impl TryFrom<i16> for usize`

1.34.0[src]

`type Error = TryFromIntError`

The type returned in the event of a conversion error.

`fn try_from(u: i16) -> Result<usize, TryFromIntError>`

[src]

`impl TryFrom<u128> for usize`

1.34.0[src]

`type Error = TryFromIntError`

The type returned in the event of a conversion error.

`fn try_from(u: u128) -> Result<usize, TryFromIntError>`

[src]

`impl TryFrom<u64> for usize`

1.34.0[src]

`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]

`impl<'_, '_> Shl<&'_ u128> for &'_ usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'_, '_> Shl<&'_ u16> for &'_ usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'a> Shl<i64> for &'a usize`

[src]

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

The resulting type after applying the `<<`

operator.

`fn shl(self, other: i64) -> <usize as Shl<i64>>::Output`

[src]

`impl<'_, '_> Shl<&'_ i64> for &'_ usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'_, '_> Shl<&'_ i128> for &'_ usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'_> Shl<&'_ u64> for usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'a> Shl<u64> for &'a usize`

[src]

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

The resulting type after applying the `<<`

operator.

`fn shl(self, other: u64) -> <usize as Shl<u64>>::Output`

[src]

`impl<'a> Shl<isize> for &'a usize`

[src]

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

The resulting type after applying the `<<`

operator.

`fn shl(self, other: isize) -> <usize as Shl<isize>>::Output`

[src]

`impl<'_, '_> Shl<&'_ i8> for &'_ usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'a> Shl<u8> for &'a usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'_> Shl<&'_ isize> for usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl Shl<u16> for usize`

[src]

`type Output = usize`

The resulting type after applying the `<<`

operator.

`fn shl(self, other: u16) -> usize`

[src]

`impl<'a> Shl<i128> for &'a usize`

[src]

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

The resulting type after applying the `<<`

operator.

`fn shl(self, other: i128) -> <usize as Shl<i128>>::Output`

[src]

`impl<'_, '_> Shl<&'_ u8> for &'_ usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl Shl<i64> for usize`

[src]

`type Output = usize`

The resulting type after applying the `<<`

operator.

`fn shl(self, other: i64) -> usize`

[src]

`impl<'_> Shl<&'_ u128> for usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'a> Shl<usize> for &'a usize`

[src]

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

The resulting type after applying the `<<`

operator.

`fn shl(self, other: usize) -> <usize as Shl<usize>>::Output`

[src]

`impl<'_, '_> Shl<&'_ isize> for &'_ usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'_> Shl<&'_ u32> for usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'a> Shl<u16> for &'a usize`

[src]

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

The resulting type after applying the `<<`

operator.

`fn shl(self, other: u16) -> <usize as Shl<u16>>::Output`

[src]

`impl<'a> Shl<u32> for &'a usize`

[src]

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

The resulting type after applying the `<<`

operator.

`fn shl(self, other: u32) -> <usize as Shl<u32>>::Output`

[src]

`impl<'a> Shl<i32> for &'a usize`

[src]

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

The resulting type after applying the `<<`

operator.

`fn shl(self, other: i32) -> <usize as Shl<i32>>::Output`

[src]

`impl<'_, '_> Shl<&'_ i16> for &'_ usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl Shl<i128> for usize`

[src]

`type Output = usize`

The resulting type after applying the `<<`

operator.

`fn shl(self, other: i128) -> usize`

[src]

`impl<'_, '_> Shl<&'_ i32> for &'_ usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl Shl<usize> for usize`

[src]

`type Output = usize`

The resulting type after applying the `<<`

operator.

`fn shl(self, other: usize) -> usize`

[src]

`impl Shl<u8> for usize`

[src]

`type Output = usize`

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'_> Shl<&'_ i16> for usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl Shl<i32> for usize`

[src]

`type Output = usize`

The resulting type after applying the `<<`

operator.

`fn shl(self, other: i32) -> usize`

[src]

`impl<'_> Shl<&'_ usize> for usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'_> Shl<&'_ u8> for usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'_> Shl<&'_ i32> for usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl Shl<u128> for usize`

[src]

`type Output = usize`

The resulting type after applying the `<<`

operator.

`fn shl(self, other: u128) -> usize`

[src]

`impl Shl<u64> for usize`

[src]

`type Output = usize`

The resulting type after applying the `<<`

operator.

`fn shl(self, other: u64) -> usize`

[src]

`impl Shl<i8> for usize`

[src]

`type Output = usize`

The resulting type after applying the `<<`

operator.

`fn shl(self, other: i8) -> usize`

[src]

`impl<'a> Shl<u128> for &'a usize`

[src]

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

The resulting type after applying the `<<`

operator.

`fn shl(self, other: u128) -> <usize as Shl<u128>>::Output`

[src]

`impl<'_> Shl<&'_ u16> for usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'_> Shl<&'_ i8> for usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl Shl<u32> for usize`

[src]

`type Output = usize`

The resulting type after applying the `<<`

operator.

`fn shl(self, other: u32) -> usize`

[src]

`impl<'_> Shl<&'_ i128> for usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'_, '_> Shl<&'_ u64> for &'_ usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl<'a> Shl<i8> for &'a usize`

[src]

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

The resulting type after applying the `<<`

operator.

`fn shl(self, other: i8) -> <usize as Shl<i8>>::Output`

[src]

`impl<'_> Shl<&'_ i64> for usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl Shl<isize> for usize`

[src]

`type Output = usize`

The resulting type after applying the `<<`

operator.

`fn shl(self, other: isize) -> usize`

[src]

`impl<'_, '_> Shl<&'_ u32> for &'_ usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl Shl<i16> for usize`

[src]

`type Output = usize`

The resulting type after applying the `<<`

operator.

`fn shl(self, other: i16) -> usize`

[src]

`impl<'a> Shl<i16> for &'a usize`

[src]

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

The resulting type after applying the `<<`

operator.

`fn shl(self, other: i16) -> <usize as Shl<i16>>::Output`

[src]

`impl<'_, '_> Shl<&'_ usize> for &'_ usize`

[src]

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

The resulting type after applying the `<<`

operator.

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

[src]

`impl Hash for usize`

[src]

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

H: Hasher,

[src]

H: Hasher,

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

H: Hasher,

[src]

H: Hasher,

`impl FromStr for usize`

[src]

`type Err = ParseIntError`

The associated error which can be returned from parsing.

`fn from_str(src: &str) -> Result<usize, ParseIntError>`

[src]

`impl<'_> BitAnd<&'_ usize> for usize`

[src]

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

The resulting type after applying the `&`

operator.

`fn bitand(self, other: &usize) -> <usize as BitAnd<usize>>::Output`

[src]

`impl<'_, '_> BitAnd<&'_ usize> for &'_ usize`

[src]

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

The resulting type after applying the `&`

operator.

`fn bitand(self, other: &usize) -> <usize as BitAnd<usize>>::Output`

[src]

`impl<'a> BitAnd<usize> for &'a usize`

[src]

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

The resulting type after applying the `&`

operator.

`fn bitand(self, other: usize) -> <usize as BitAnd<usize>>::Output`

[src]

`impl BitAnd<usize> for usize`

[src]

`type Output = usize`

The resulting type after applying the `&`

operator.

`fn bitand(self, rhs: usize) -> usize`

[src]

`impl<T> SliceIndex<[T]> for usize`

1.15.0[src]

`type Output = T`

The output type returned by methods.

`fn get(self, slice: &[T]) -> Option<&T>`

[src]

`fn get_mut(self, slice: &mut [T]) -> Option<&mut T>`

[src]

#### ⓘImportant traits for &'_ mut I`unsafe fn get_unchecked(self, slice: &[T]) -> &T`

[src]

#### ⓘImportant traits for &'_ mut I`unsafe fn get_unchecked_mut(self, slice: &mut [T]) -> &mut T`

[src]

#### ⓘImportant traits for &'_ mut I`fn index(self, slice: &[T]) -> &T`

[src]

#### ⓘImportant traits for &'_ mut I`fn index_mut(self, slice: &mut [T]) -> &mut T`

[src]

`impl Binary for usize`

[src]

`impl Debug for usize`

[src]

`impl ShlAssign<i16> for usize`

1.8.0[src]

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

[src]

`impl ShlAssign<u16> for usize`

1.8.0[src]

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

[src]

`impl<'_> ShlAssign<&'_ i8> for usize`

1.22.0[src]

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

[src]

`impl ShlAssign<usize> for usize`

1.8.0[src]

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

[src]

`impl<'_> ShlAssign<&'_ u128> for usize`

1.22.0[src]

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

[src]

`impl<'_> ShlAssign<&'_ isize> for usize`

1.22.0[src]

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

[src]

`impl ShlAssign<u64> for usize`

1.8.0[src]

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

[src]

`impl ShlAssign<i32> for usize`

1.8.0[src]

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

[src]

`impl<'_> ShlAssign<&'_ i16> for usize`

1.22.0[src]

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

[src]

`impl<'_> ShlAssign<&'_ i32> for usize`

1.22.0[src]

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

[src]

`impl<'_> ShlAssign<&'_ i64> for usize`

1.22.0[src]

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

[src]

`impl<'_> ShlAssign<&'_ usize> for usize`

1.22.0[src]

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

[src]

`impl ShlAssign<isize> for usize`

1.8.0[src]

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

[src]

`impl ShlAssign<u32> for usize`

1.8.0[src]

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

[src]

`impl ShlAssign<i8> for usize`

1.8.0[src]

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

[src]

`impl<'_> ShlAssign<&'_ u8> for usize`

1.22.0[src]

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

[src]

`impl<'_> ShlAssign<&'_ u16> for usize`

1.22.0[src]

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

[src]

`impl<'_> ShlAssign<&'_ u32> for usize`

1.22.0[src]

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

[src]

`impl ShlAssign<i128> for usize`

1.8.0[src]

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

[src]

`impl ShlAssign<i64> for usize`

1.8.0[src]

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

[src]

`impl<'_> ShlAssign<&'_ i128> for usize`

1.22.0[src]

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

[src]

`impl<'_> ShlAssign<&'_ u64> for usize`

1.22.0[src]

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

[src]

`impl ShlAssign<u8> for usize`

1.8.0[src]

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

[src]

`impl ShlAssign<u128> for usize`

1.8.0[src]

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

[src]

`impl BitXorAssign<usize> for usize`

1.8.0[src]

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

[src]

`impl<'_> BitXorAssign<&'_ usize> for usize`

1.22.0[src]

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

[src]

`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.

`fn div(self, other: usize) -> usize`

[src]

`impl<'_> Div<&'_ usize> for usize`

[src]

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

The resulting type after applying the `/`

operator.

`fn div(self, other: &usize) -> <usize as Div<usize>>::Output`

[src]

`impl<'a> Div<usize> for &'a usize`

[src]

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

The resulting type after applying the `/`

operator.

`fn div(self, other: usize) -> <usize as Div<usize>>::Output`

[src]

`impl<'_, '_> Div<&'_ usize> for &'_ usize`

[src]

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

The resulting type after applying the `/`

operator.

`fn div(self, other: &usize) -> <usize as Div<usize>>::Output`

[src]

`impl BitOrAssign<usize> for usize`

1.8.0[src]

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

[src]

`impl<'_> BitOrAssign<&'_ usize> for usize`

1.22.0[src]

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

[src]

`impl BitAndAssign<usize> for usize`

1.8.0[src]

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

[src]

`impl<'_> BitAndAssign<&'_ usize> for usize`

1.22.0[src]

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

[src]

`impl<'_, '_> Add<&'_ usize> for &'_ usize`

[src]

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

The resulting type after applying the `+`

operator.

`fn add(self, other: &usize) -> <usize as Add<usize>>::Output`

[src]

`impl<'_> Add<&'_ usize> for usize`

[src]

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

The resulting type after applying the `+`

operator.

`fn add(self, other: &usize) -> <usize as Add<usize>>::Output`

[src]

`impl<'a> Add<usize> for &'a usize`

[src]

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

The resulting type after applying the `+`

operator.

`fn add(self, other: usize) -> <usize as Add<usize>>::Output`

[src]

`impl Add<usize> for usize`

[src]

`type Output = usize`

The resulting type after applying the `+`

operator.

`fn add(self, other: usize) -> usize`

[src]

`impl From<bool> for usize`

1.28.0[src]

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);Run

`impl From<NonZeroUsize> for usize`

1.31.0[src]

`fn from(nonzero: NonZeroUsize) -> usize`

[src]

`impl From<u16> for usize`

1.26.0[src]

Converts `u16`

to `usize`

losslessly.

`impl From<u8> for usize`

1.5.0[src]

Converts `u8`

to `usize`

losslessly.

`impl<'a> BitOr<usize> for &'a usize`

[src]

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

The resulting type after applying the `|`

operator.

`fn bitor(self, other: usize) -> <usize as BitOr<usize>>::Output`

[src]

`impl<'_, '_> BitOr<&'_ usize> for &'_ usize`

[src]

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

The resulting type after applying the `|`

operator.

`fn bitor(self, other: &usize) -> <usize as BitOr<usize>>::Output`

[src]

`impl<'_> BitOr<&'_ usize> for usize`

[src]

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

The resulting type after applying the `|`

operator.

`fn bitor(self, other: &usize) -> <usize as BitOr<usize>>::Output`

[src]

`impl BitOr<usize> for usize`

[src]

`type Output = usize`

The resulting type after applying the `|`

operator.

`fn bitor(self, rhs: usize) -> usize`

[src]

`impl Default for usize`

[src]

`impl Product<usize> for usize`

1.12.0[src]

`impl<'a> Product<&'a usize> for usize`

1.12.0[src]

`impl<'_> RemAssign<&'_ usize> for usize`

1.22.0[src]

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

[src]

`impl RemAssign<usize> for usize`

1.8.0[src]

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

[src]

`impl DivAssign<usize> for usize`

1.8.0[src]

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

[src]

`impl<'_> DivAssign<&'_ usize> for usize`

1.22.0[src]

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

[src]

`impl<'_> MulAssign<&'_ usize> for usize`

1.22.0[src]

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

[src]

`impl MulAssign<usize> for usize`

1.8.0[src]

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

[src]

`impl Step for usize`

[src]

`fn steps_between(start: &usize, end: &usize) -> Option<usize>`

[src]

`fn add_usize(&self, n: usize) -> Option<usize>`

[src]

`fn replace_one(&mut self) -> usize`

[src]

`fn replace_zero(&mut self) -> usize`

[src]

`fn add_one(&self) -> usize`

[src]

`fn sub_one(&self) -> usize`

[src]

`impl<'_> SubAssign<&'_ usize> for usize`

1.22.0[src]

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

[src]

`impl SubAssign<usize> for usize`

1.8.0[src]

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

[src]

`impl<'_> AddAssign<&'_ usize> for usize`

1.22.0[src]

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

[src]

`impl AddAssign<usize> for usize`

1.8.0[src]

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

[src]

`impl UpperHex for usize`

[src]

`impl ShrAssign<u32> for usize`

1.8.0[src]

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

[src]

`impl<'_> ShrAssign<&'_ i16> for usize`

1.22.0[src]

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

[src]

`impl<'_> ShrAssign<&'_ u16> for usize`

1.22.0[src]

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

[src]

`impl<'_> ShrAssign<&'_ u32> for usize`

1.22.0[src]

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

[src]

`impl<'_> ShrAssign<&'_ u8> for usize`

1.22.0[src]

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

[src]

`impl ShrAssign<i8> for usize`

1.8.0[src]

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

[src]

`impl<'_> ShrAssign<&'_ usize> for usize`

1.22.0[src]

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

[src]

`impl ShrAssign<i128> for usize`

1.8.0[src]

`fn shr_assign(&mut self, other: i128)`

[src]

`impl<'_> ShrAssign<&'_ i32> for usize`

1.22.0[src]

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

[src]

`impl<'_> ShrAssign<&'_ u128> for usize`

1.22.0[src]

`fn shr_assign(&mut self, other: &u128)`

[src]

`impl ShrAssign<i64> for usize`

1.8.0[src]

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

[src]

`impl<'_> ShrAssign<&'_ isize> for usize`

1.22.0[src]

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

[src]

`impl ShrAssign<u64> for usize`

1.8.0[src]

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

[src]

`impl ShrAssign<u8> for usize`

1.8.0[src]

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

[src]

`impl<'_> ShrAssign<&'_ i128> for usize`

1.22.0[src]

`fn shr_assign(&mut self, other: &i128)`

[src]

`impl ShrAssign<isize> for usize`

1.8.0[src]

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

[src]

`impl<'_> ShrAssign<&'_ u64> for usize`

1.22.0[src]

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

[src]

`impl ShrAssign<usize> for usize`

1.8.0[src]

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

[src]

`impl ShrAssign<i16> for usize`

1.8.0[src]

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

[src]

`impl ShrAssign<u16> for usize`

1.8.0[src]

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

[src]

`impl ShrAssign<i32> for usize`

1.8.0[src]

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

[src]

`impl<'_> ShrAssign<&'_ i8> for usize`

1.22.0[src]

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

[src]

`impl ShrAssign<u128> for usize`

1.8.0[src]

`fn shr_assign(&mut self, other: u128)`

[src]

`impl<'_> ShrAssign<&'_ i64> for usize`

1.22.0[src]

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

[src]

`impl Octal for usize`

[src]

`impl Ord for usize`

[src]

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

[src]

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

1.21.0[src]

Compares and returns the maximum of two values. Read more

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

1.21.0[src]

Compares and returns the minimum of two values. Read more

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

[src]

Restrict a value to a certain interval. Read more

`impl<'_, '_> Sub<&'_ usize> for &'_ usize`

[src]

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

The resulting type after applying the `-`

operator.

`fn sub(self, other: &usize) -> <usize as Sub<usize>>::Output`

[src]

`impl<'_> Sub<&'_ usize> for usize`

[src]

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

The resulting type after applying the `-`

operator.

`fn sub(self, other: &usize) -> <usize as Sub<usize>>::Output`

[src]

`impl<'a> Sub<usize> for &'a usize`

[src]

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

The resulting type after applying the `-`

operator.

`fn sub(self, other: usize) -> <usize as Sub<usize>>::Output`

[src]

`impl Sub<usize> for usize`

[src]

`type Output = usize`

The resulting type after applying the `-`

operator.

`fn sub(self, other: usize) -> usize`

[src]

`impl Eq for usize`

[src]

`impl<'_, '_> Shr<&'_ isize> for &'_ usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'_, '_> Shr<&'_ u128> for &'_ usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'_, '_> Shr<&'_ u16> for &'_ usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'_, '_> Shr<&'_ i16> for &'_ usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'_, '_> Shr<&'_ u64> for &'_ usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'a> Shr<i16> for &'a usize`

[src]

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

The resulting type after applying the `>>`

operator.

`fn shr(self, other: i16) -> <usize as Shr<i16>>::Output`

[src]

`impl<'_, '_> Shr<&'_ i32> for &'_ usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl Shr<isize> for usize`

[src]

`type Output = usize`

The resulting type after applying the `>>`

operator.

`fn shr(self, other: isize) -> usize`

[src]

`impl Shr<u64> for usize`

[src]

`type Output = usize`

The resulting type after applying the `>>`

operator.

`fn shr(self, other: u64) -> usize`

[src]

`impl Shr<u8> for usize`

[src]

`type Output = usize`

The resulting type after applying the `>>`

operator.

`fn shr(self, other: u8) -> usize`

[src]

`impl<'a> Shr<usize> for &'a usize`

[src]

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

The resulting type after applying the `>>`

operator.

`fn shr(self, other: usize) -> <usize as Shr<usize>>::Output`

[src]

`impl Shr<u16> for usize`

[src]

`type Output = usize`

The resulting type after applying the `>>`

operator.

`fn shr(self, other: u16) -> usize`

[src]

`impl<'a> Shr<u32> for &'a usize`

[src]

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

The resulting type after applying the `>>`

operator.

`fn shr(self, other: u32) -> <usize as Shr<u32>>::Output`

[src]

`impl Shr<u128> for usize`

[src]

`type Output = usize`

The resulting type after applying the `>>`

operator.

`fn shr(self, other: u128) -> usize`

[src]

`impl Shr<i128> for usize`

[src]

`type Output = usize`

The resulting type after applying the `>>`

operator.

`fn shr(self, other: i128) -> usize`

[src]

`impl<'_, '_> Shr<&'_ i128> for &'_ usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'_> Shr<&'_ usize> for usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'_, '_> Shr<&'_ u8> for &'_ usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'_> Shr<&'_ i128> for usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'_> Shr<&'_ u8> for usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'_> Shr<&'_ u128> for usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'a> Shr<u64> for &'a usize`

[src]

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

The resulting type after applying the `>>`

operator.

`fn shr(self, other: u64) -> <usize as Shr<u64>>::Output`

[src]

`impl<'a> Shr<i128> for &'a usize`

[src]

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

The resulting type after applying the `>>`

operator.

`fn shr(self, other: i128) -> <usize as Shr<i128>>::Output`

[src]

`impl<'a> Shr<isize> for &'a usize`

[src]

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

The resulting type after applying the `>>`

operator.

`fn shr(self, other: isize) -> <usize as Shr<isize>>::Output`

[src]

`impl Shr<usize> for usize`

[src]

`type Output = usize`

The resulting type after applying the `>>`

operator.

`fn shr(self, other: usize) -> usize`

[src]

`impl Shr<i8> for usize`

[src]

`type Output = usize`

The resulting type after applying the `>>`

operator.

`fn shr(self, other: i8) -> usize`

[src]

`impl<'_, '_> Shr<&'_ u32> for &'_ usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'_> Shr<&'_ i16> for usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl Shr<i32> for usize`

[src]

`type Output = usize`

The resulting type after applying the `>>`

operator.

`fn shr(self, other: i32) -> usize`

[src]

`impl Shr<i16> for usize`

[src]

`type Output = usize`

The resulting type after applying the `>>`

operator.

`fn shr(self, other: i16) -> usize`

[src]

`impl<'_, '_> Shr<&'_ usize> for &'_ usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'a> Shr<i8> for &'a usize`

[src]

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

The resulting type after applying the `>>`

operator.

`fn shr(self, other: i8) -> <usize as Shr<i8>>::Output`

[src]

`impl<'_> Shr<&'_ u16> for usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'a> Shr<i32> for &'a usize`

[src]

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

The resulting type after applying the `>>`

operator.

`fn shr(self, other: i32) -> <usize as Shr<i32>>::Output`

[src]

`impl<'_> Shr<&'_ i64> for usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'_> Shr<&'_ isize> for usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'_, '_> Shr<&'_ i8> for &'_ usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl Shr<u32> for usize`

[src]

`type Output = usize`

The resulting type after applying the `>>`

operator.

`fn shr(self, other: u32) -> usize`

[src]

`impl Shr<i64> for usize`

[src]

`type Output = usize`

The resulting type after applying the `>>`

operator.

`fn shr(self, other: i64) -> usize`

[src]

`impl<'a> Shr<u8> for &'a usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'a> Shr<u128> for &'a usize`

[src]

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

The resulting type after applying the `>>`

operator.

`fn shr(self, other: u128) -> <usize as Shr<u128>>::Output`

[src]

`impl<'_, '_> Shr<&'_ i64> for &'_ usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'a> Shr<i64> for &'a usize`

[src]

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

The resulting type after applying the `>>`

operator.

`fn shr(self, other: i64) -> <usize as Shr<i64>>::Output`

[src]

`impl<'_> Shr<&'_ u64> for usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'_> Shr<&'_ i8> for usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'a> Shr<u16> for &'a usize`

[src]

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

The resulting type after applying the `>>`

operator.

`fn shr(self, other: u16) -> <usize as Shr<u16>>::Output`

[src]

`impl<'_> Shr<&'_ u32> for usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl<'_> Shr<&'_ i32> for usize`

[src]

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

The resulting type after applying the `>>`

operator.

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

[src]

`impl PartialEq<usize> for usize`

[src]

`impl<'_> BitXor<&'_ usize> for usize`

[src]

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

The resulting type after applying the `^`

operator.

`fn bitxor(self, other: &usize) -> <usize as BitXor<usize>>::Output`

[src]

`impl<'a> BitXor<usize> for &'a usize`

[src]

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

The resulting type after applying the `^`

operator.

`fn bitxor(self, other: usize) -> <usize as BitXor<usize>>::Output`

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`impl<'_, '_> BitXor<&'_ usize> for &'_ usize`

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

The resulting type after applying the `^`

operator.

`fn bitxor(self, other: &usize) -> <usize as BitXor<usize>>::Output`

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`impl BitXor<usize> for usize`

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`type Output = usize`

The resulting type after applying the `^`

operator.

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

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`impl<'_> Not for &'_ usize`

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`type Output = <usize as Not>::Output`

The resulting type after applying the `!`

operator.

`fn not(self) -> <usize as Not>::Output`

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`impl Not for usize`

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`impl<'a> Sum<&'a usize> for usize`

1.12.0[src]

`impl Sum<usize> for usize`

1.12.0[src]

`impl Copy for usize`

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`impl Clone for usize`

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`fn clone(&self) -> usize`

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

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Performs copy-assignment from `source`

. Read more

`impl PartialOrd<usize> for usize`

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

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`fn lt(&self, other: &usize) -> bool`

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`fn le(&self, other: &usize) -> bool`

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`fn ge(&self, other: &usize) -> bool`

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`fn gt(&self, other: &usize) -> bool`

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`impl LowerHex for usize`

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`impl Rem<usize> for usize`

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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.

`fn rem(self, other: usize) -> usize`

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`impl<'_, '_> Rem<&'_ usize> for &'_ usize`

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

The resulting type after applying the `%`

operator.

`fn rem(self, other: &usize) -> <usize as Rem<usize>>::Output`

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`impl<'_> Rem<&'_ usize> for usize`

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

The resulting type after applying the `%`

operator.

`fn rem(self, other: &usize) -> <usize as Rem<usize>>::Output`

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`impl<'a> Rem<usize> for &'a usize`

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

The resulting type after applying the `%`

operator.

`fn rem(self, other: usize) -> <usize as Rem<usize>>::Output`

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`impl Display for usize`

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`impl<'_> Mul<&'_ usize> for usize`

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

The resulting type after applying the `*`

operator.

`fn mul(self, other: &usize) -> <usize as Mul<usize>>::Output`

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`impl Mul<usize> for usize`

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`type Output = usize`

The resulting type after applying the `*`

operator.

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

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`impl<'_, '_> Mul<&'_ usize> for &'_ usize`

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

The resulting type after applying the `*`

operator.

`fn mul(self, other: &usize) -> <usize as Mul<usize>>::Output`

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

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## Auto Trait Implementations

## Blanket Implementations

`impl<T> From for T`

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

U: Into<T>,

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U: Into<T>,

`type Error = Infallible`

The type returned in the event of a conversion error.

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

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

U: TryFrom<T>,

[src]

U: TryFrom<T>,

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

The type returned in the event of a conversion error.

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

[src]

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

U: From<T>,

[src]

U: From<T>,

`impl<T> Borrow for T where`

T: ?Sized,

[src]

T: ?Sized,

`impl<T> BorrowMut for T where`

T: ?Sized,

[src]

T: ?Sized,

#### ⓘImportant traits for &'_ mut I`fn borrow_mut(&mut self) -> &mut T`

[src]

`impl<T> Any for T where`

T: 'static + ?Sized,

[src]

T: 'static + ?Sized,

`impl<T> ToOwned for T where`

T: Clone,

[src]

T: Clone,

`impl<T> ToString for T where`

T: Display + ?Sized,

[src]

T: Display + ?Sized,