Primitive Type isize

The pointer-sized signed integer type.

See also the std::isize 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 isize

pub const fn min_value() -> isize

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

Examples

Basic usage:

assert_eq!(isize::min_value(), -9223372036854775808);

pub const fn max_value() -> isize

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

Examples

Basic usage:

assert_eq!(isize::max_value(), 9223372036854775807);

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

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

The string is expected to be an optional + or - 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!(isize::from_str_radix("A", 16), Ok(10));

pub const fn count_ones(self) -> u32

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

Examples

Basic usage:

let n = 0b100_0000isize;

assert_eq!(n.count_ones(), 1);

pub const fn count_zeros(self) -> u32

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

Examples

Basic usage:

assert_eq!(isize::max_value().count_zeros(), 1);

pub const fn leading_zeros(self) -> u32

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

Examples

Basic usage:

let n = -1isize;

assert_eq!(n.leading_zeros(), 0);

pub const fn trailing_zeros(self) -> u32

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

Examples

Basic usage:

let n = -4isize;

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

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

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 = 0xaa00000000006e1isize;
let m = 0x6e10aa;

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

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

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 = 0x6e10aaisize;
let m = 0xaa00000000006e1;

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

pub const fn swap_bytes(self) -> isize

Reverses the byte order of the integer.

Examples

Basic usage:

let n = 0x1234567890123456isize;

let m = n.swap_bytes();

assert_eq!(m, 0x5634129078563412);

pub fn reverse_bits(self) -> isize

🔬 This is a nightly-only experimental API. (reverse_bits #48763)

Reverses the bit pattern of the integer.

Examples

Basic usage:

#![feature(reverse_bits)]

let n = 0x1234567890123456isize;
let m = n.reverse_bits();

assert_eq!(m, 0x6a2c48091e6a2c48);

pub const fn from_be(x: isize) -> isize

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 = 0x1Aisize;

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

pub const fn from_le(x: isize) -> isize

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 = 0x1Aisize;

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

pub const fn to_be(self) -> isize

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 = 0x1Aisize;

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) -> isize

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 = 0x1Aisize;

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

pub fn checked_add(self, rhs: isize) -> Option<isize>

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

Examples

Basic usage:

assert_eq!((isize::max_value() - 2).checked_add(1), Some(isize::max_value() - 1));
assert_eq!((isize::max_value() - 2).checked_add(3), None);

pub fn checked_sub(self, rhs: isize) -> Option<isize>

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

Examples

Basic usage:

assert_eq!((isize::min_value() + 2).checked_sub(1), Some(isize::min_value() + 1));
assert_eq!((isize::min_value() + 2).checked_sub(3), None);

pub fn checked_mul(self, rhs: isize) -> Option<isize>

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

Examples

Basic usage:

assert_eq!(isize::max_value().checked_mul(1), Some(isize::max_value()));
assert_eq!(isize::max_value().checked_mul(2), None);

pub fn checked_div(self, rhs: isize) -> Option<isize>

Checked integer division. Computes self / rhs, returning None if rhs == 0 or the division results in overflow.

Examples

Basic usage:

assert_eq!((isize::min_value() + 1).checked_div(-1), Some(9223372036854775807));
assert_eq!(isize::min_value().checked_div(-1), None);
assert_eq!((1isize).checked_div(0), None);

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

🔬 This is a nightly-only experimental API. (euclidean_division #49048)

Checked Euclidean division. Computes self.div_euclid(rhs), returning None if rhs == 0 or the division results in overflow.

Examples

Basic usage:

#![feature(euclidean_division)]
assert_eq!((isize::min_value() + 1).checked_div_euclid(-1), Some(9223372036854775807));
assert_eq!(isize::min_value().checked_div_euclid(-1), None);
assert_eq!((1isize).checked_div_euclid(0), None);

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

Checked integer remainder. Computes self % rhs, returning None if rhs == 0 or the division results in overflow.

Examples

Basic usage:

use std::isize;

assert_eq!(5isize.checked_rem(2), Some(1));
assert_eq!(5isize.checked_rem(0), None);
assert_eq!(isize::MIN.checked_rem(-1), None);

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

🔬 This is a nightly-only experimental API. (euclidean_division #49048)

Checked Euclidean remainder. Computes self.rem_euclid(rhs), returning None if rhs == 0 or the division results in overflow.

Examples

Basic usage:

#![feature(euclidean_division)]
use std::isize;

assert_eq!(5isize.checked_rem_euclid(2), Some(1));
assert_eq!(5isize.checked_rem_euclid(0), None);
assert_eq!(isize::MIN.checked_rem_euclid(-1), None);

pub fn checked_neg(self) -> Option<isize>

Checked negation. Computes -self, returning None if self == MIN.

Examples

Basic usage:

use std::isize;

assert_eq!(5isize.checked_neg(), Some(-5));
assert_eq!(isize::MIN.checked_neg(), None);

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

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!(0x1isize.checked_shl(4), Some(0x10));
assert_eq!(0x1isize.checked_shl(129), None);

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

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!(0x10isize.checked_shr(4), Some(0x1));
assert_eq!(0x10isize.checked_shr(128), None);

pub fn checked_abs(self) -> Option<isize>

Checked absolute value. Computes self.abs(), returning None if self == MIN.

Examples

Basic usage:

use std::isize;

assert_eq!((-5isize).checked_abs(), Some(5));
assert_eq!(isize::MIN.checked_abs(), None);

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

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

Examples

Basic usage:

assert_eq!(8isize.checked_pow(2), Some(64));
assert_eq!(isize::max_value().checked_pow(2), None);

pub fn saturating_add(self, rhs: isize) -> isize

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

Examples

Basic usage:

assert_eq!(100isize.saturating_add(1), 101);
assert_eq!(isize::max_value().saturating_add(100), isize::max_value());

pub fn saturating_sub(self, rhs: isize) -> isize

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

Examples

Basic usage:

assert_eq!(100isize.saturating_sub(127), -27);
assert_eq!(isize::min_value().saturating_sub(100), isize::min_value());

pub fn saturating_mul(self, rhs: isize) -> isize

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

Examples

Basic usage:

use std::isize;

assert_eq!(10isize.saturating_mul(12), 120);
assert_eq!(isize::MAX.saturating_mul(10), isize::MAX);
assert_eq!(isize::MIN.saturating_mul(10), isize::MIN);

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

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

Examples

Basic usage:

use std::isize;

assert_eq!((-4isize).saturating_pow(3), -64);
assert_eq!(isize::MIN.saturating_pow(2), isize::MAX);
assert_eq!(isize::MIN.saturating_pow(3), isize::MIN);

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

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

Examples

Basic usage:

assert_eq!(100isize.wrapping_add(27), 127);
assert_eq!(isize::max_value().wrapping_add(2), isize::min_value() + 1);

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

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

Examples

Basic usage:

assert_eq!(0isize.wrapping_sub(127), -127);
assert_eq!((-2isize).wrapping_sub(isize::max_value()), isize::max_value());

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

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

Examples

Basic usage:

assert_eq!(10isize.wrapping_mul(12), 120);
assert_eq!(11i8.wrapping_mul(12), -124);

pub fn wrapping_div(self, rhs: isize) -> isize

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

The only case where such wrapping can occur is when one divides MIN / -1 on a signed type (where MIN is the negative minimal value for the type); this is equivalent to -MIN, a positive value that is too large to represent in the type. In such a case, this function returns MIN itself.

Panics

This function will panic if rhs is 0.

Examples

Basic usage:

assert_eq!(100isize.wrapping_div(10), 10);
assert_eq!((-128i8).wrapping_div(-1), -128);

pub fn wrapping_div_euclid(self, rhs: isize) -> isize

🔬 This is a nightly-only experimental API. (euclidean_division #49048)

Wrapping Euclidean division. Computes self.div_euclid(rhs), wrapping around at the boundary of the type.

Wrapping will only occur in MIN / -1 on a signed type (where MIN is the negative minimal value for the type). This is equivalent to -MIN, a positive value that is too large to represent in the type. In this case, this method returns MIN itself.

Panics

This function will panic if rhs is 0.

Examples

Basic usage:

#![feature(euclidean_division)]
assert_eq!(100isize.wrapping_div_euclid(10), 10);
assert_eq!((-128i8).wrapping_div_euclid(-1), -128);

pub fn wrapping_rem(self, rhs: isize) -> isize

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

Such wrap-around never actually occurs mathematically; implementation artifacts make x % y invalid for MIN / -1 on a signed type (where MIN is the negative minimal value). In such a case, this function returns 0.

Panics

This function will panic if rhs is 0.

Examples

Basic usage:

assert_eq!(100isize.wrapping_rem(10), 0);
assert_eq!((-128i8).wrapping_rem(-1), 0);

pub fn wrapping_rem_euclid(self, rhs: isize) -> isize

🔬 This is a nightly-only experimental API. (euclidean_division #49048)

Wrapping Euclidean remainder. Computes self.rem_euclid(rhs), wrapping around at the boundary of the type.

Wrapping will only occur in MIN % -1 on a signed type (where MIN is the negative minimal value for the type). In this case, this method returns 0.

Panics

This function will panic if rhs is 0.

Examples

Basic usage:

#![feature(euclidean_division)]
assert_eq!(100isize.wrapping_rem_euclid(10), 0);
assert_eq!((-128i8).wrapping_rem_euclid(-1), 0);

pub const fn wrapping_neg(self) -> isize

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

The only case where such wrapping can occur is when one negates MIN on a signed type (where MIN is the negative minimal value for the type); this is a positive value that is too large to represent in the type. In such a case, this function returns MIN itself.

Examples

Basic usage:

assert_eq!(100isize.wrapping_neg(), -100);
assert_eq!(isize::min_value().wrapping_neg(), isize::min_value());

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

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!((-1isize).wrapping_shl(7), -128);
assert_eq!((-1isize).wrapping_shl(128), -1);

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

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!((-128isize).wrapping_shr(7), -1);
assert_eq!((-128i16).wrapping_shr(64), -128);

pub fn wrapping_abs(self) -> isize

Wrapping (modular) absolute value. Computes self.abs(), wrapping around at the boundary of the type.

The only case where such wrapping can occur is when one takes the absolute value of the negative minimal value for the type this is a positive value that is too large to represent in the type. In such a case, this function returns MIN itself.

Examples

Basic usage:

assert_eq!(100isize.wrapping_abs(), 100);
assert_eq!((-100isize).wrapping_abs(), 100);
assert_eq!(isize::min_value().wrapping_abs(), isize::min_value());
assert_eq!((-128i8).wrapping_abs() as u8, 128);

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

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

Examples

Basic usage:

assert_eq!(3isize.wrapping_pow(4), 81);
assert_eq!(3i8.wrapping_pow(5), -13);
assert_eq!(3i8.wrapping_pow(6), -39);

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

Calculates self + rhs

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

Examples

Basic usage:

use std::isize;

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

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

Calculates self - rhs

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

Examples

Basic usage:

use std::isize;

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

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

Calculates the multiplication of self and rhs.

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

Examples

Basic usage:

assert_eq!(5isize.overflowing_mul(2), (10, false));
assert_eq!(1_000_000_000i32.overflowing_mul(10), (1410065408, true));

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

Calculates the divisor when self is divided by rhs.

Returns a tuple of the divisor along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would occur then self is returned.

Panics

This function will panic if rhs is 0.

Examples

Basic usage:

use std::isize;

assert_eq!(5isize.overflowing_div(2), (2, false));
assert_eq!(isize::MIN.overflowing_div(-1), (isize::MIN, true));

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

🔬 This is a nightly-only experimental API. (euclidean_division #49048)

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. If an overflow would occur then self is returned.

Panics

This function will panic if rhs is 0.

Examples

Basic usage:

#![feature(euclidean_division)]
use std::isize;

assert_eq!(5isize.overflowing_div_euclid(2), (2, false));
assert_eq!(isize::MIN.overflowing_div_euclid(-1), (isize::MIN, true));

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

Calculates the remainder when self is divided by rhs.

Returns a tuple of the remainder after dividing along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would occur then 0 is returned.

Panics

This function will panic if rhs is 0.

Examples

Basic usage:

use std::isize;

assert_eq!(5isize.overflowing_rem(2), (1, false));
assert_eq!(isize::MIN.overflowing_rem(-1), (0, true));

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

🔬 This is a nightly-only experimental API. (euclidean_division #49048)

Overflowing Euclidean remainder. Calculates self.rem_euclid(rhs).

Returns a tuple of the remainder after dividing along with a boolean indicating whether an arithmetic overflow would occur. If an overflow would occur then 0 is returned.

Panics

This function will panic if rhs is 0.

Examples

Basic usage:

#![feature(euclidean_division)]
use std::isize;

assert_eq!(5isize.overflowing_rem_euclid(2), (1, false));
assert_eq!(isize::MIN.overflowing_rem_euclid(-1), (0, true));

pub const fn overflowing_neg(self) -> (isize, bool)

Negates self, overflowing if this is equal to the minimum value.

Returns a tuple of the negated version of self along with a boolean indicating whether an overflow happened. If self is the minimum value (e.g., i32::MIN for values of type i32), then the minimum value will be returned again and true will be returned for an overflow happening.

Examples

Basic usage:

use std::isize;

assert_eq!(2isize.overflowing_neg(), (-2, false));
assert_eq!(isize::MIN.overflowing_neg(), (isize::MIN, true));

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

Shifts self left by rhs bits.

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

Examples

Basic usage:

assert_eq!(0x1isize.overflowing_shl(4), (0x10, false));
assert_eq!(0x1i32.overflowing_shl(36), (0x10, true));

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

Shifts self right by rhs bits.

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

Examples

Basic usage:

assert_eq!(0x10isize.overflowing_shr(4), (0x1, false));
assert_eq!(0x10i32.overflowing_shr(36), (0x1, true));

pub fn overflowing_abs(self) -> (isize, bool)

Computes the absolute value of self.

Returns a tuple of the absolute version of self along with a boolean indicating whether an overflow happened. If self is the minimum value (e.g., isize::MIN for values of type isize), then the minimum value will be returned again and true will be returned for an overflow happening.

Examples

Basic usage:

assert_eq!(10isize.overflowing_abs(), (10, false));
assert_eq!((-10isize).overflowing_abs(), (10, false));
assert_eq!((isize::min_value()).overflowing_abs(), (isize::min_value(), true));

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

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

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

Examples

Basic usage:

assert_eq!(3isize.overflowing_pow(4), (81, false));
assert_eq!(3i8.overflowing_pow(5), (-13, true));

pub fn pow(self, exp: u32) -> isize

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

Examples

Basic usage:

let x: isize = 2; // or any other integer type

assert_eq!(x.pow(5), 32);

pub fn div_euclid(self, rhs: isize) -> isize

🔬 This is a nightly-only experimental API. (euclidean_division #49048)

Calculates the quotient of Euclidean division of self by rhs.

This computes the integer n such that self = n * rhs + self.rem_euclid(rhs), with 0 <= self.rem_euclid(rhs) < rhs.

In other words, the result is self / rhs rounded to the integer n such that self >= n * rhs. If self > 0, this is equal to round towards zero (the default in Rust); if self < 0, this is equal to round towards +/- infinity.

Panics

This function will panic if rhs is 0.

Examples

Basic usage:

#![feature(euclidean_division)]
let a: isize = 7; // or any other integer type
let b = 4;

assert_eq!(a.div_euclid(b), 1); // 7 >= 4 * 1
assert_eq!(a.div_euclid(-b), -1); // 7 >= -4 * -1
assert_eq!((-a).div_euclid(b), -2); // -7 >= 4 * -2
assert_eq!((-a).div_euclid(-b), 2); // -7 >= -4 * 2

pub fn rem_euclid(self, rhs: isize) -> isize

🔬 This is a nightly-only experimental API. (euclidean_division #49048)

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

This is done as if by the Euclidean division algorithm -- given r = self.rem_euclid(rhs), self = rhs * self.div_euclid(rhs) + r, and 0 <= r < abs(rhs).

Panics

This function will panic if rhs is 0.

Examples

Basic usage:

#![feature(euclidean_division)]
let a: isize = 7; // or any other integer type
let b = 4;

assert_eq!(a.rem_euclid(b), 3);
assert_eq!((-a).rem_euclid(b), 1);
assert_eq!(a.rem_euclid(-b), 3);
assert_eq!((-a).rem_euclid(-b), 1);

pub fn abs(self) -> isize

Computes the absolute value of self.

Overflow behavior

The absolute value of isize::min_value() cannot be represented as an isize, and attempting to calculate it will cause an overflow. This means that code in debug mode will trigger a panic on this case and optimized code will return isize::min_value() without a panic.

Examples

Basic usage:

assert_eq!(10isize.abs(), 10);
assert_eq!((-10isize).abs(), 10);

pub fn signum(self) -> isize

Returns a number representing sign of self.

• 0 if the number is zero
• 1 if the number is positive
• -1 if the number is negative

Examples

Basic usage:

assert_eq!(10isize.signum(), 1);
assert_eq!(0isize.signum(), 0);
assert_eq!((-10isize).signum(), -1);

pub const fn is_positive(self) -> bool

Returns true if self is positive and false if the number is zero or negative.

Examples

Basic usage:

assert!(10isize.is_positive());
assert!(!(-10isize).is_positive());

pub const fn is_negative(self) -> bool

Returns true if self is negative and false if the number is zero or positive.

Examples

Basic usage:

assert!((-10isize).is_negative());
assert!(!10isize.is_negative());

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

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

Examples

let bytes = 0x1234567890123456isize.to_be_bytes();
assert_eq!(bytes, [0x12, 0x34, 0x56, 0x78, 0x90, 0x12, 0x34, 0x56]);

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

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

Examples

let bytes = 0x1234567890123456isize.to_le_bytes();
assert_eq!(bytes, [0x56, 0x34, 0x12, 0x90, 0x78, 0x56, 0x34, 0x12]);

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

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 = 0x1234567890123456isize.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 fn from_be_bytes(bytes: [u8; 8]) -> isize

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

Examples

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

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

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

Examples

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

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

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

Trait Implementations

impl BitXorAssign<isize> for isize

fn bitxor_assign(&mut self, other: isize)

Performs the ^= operation.

impl<'_> BitXorAssign<&'_ isize> for isize

fn bitxor_assign(&mut self, other: &isize)

Performs the ^= operation.

impl<'_> BitOrAssign<&'_ isize> for isize

fn bitor_assign(&mut self, other: &isize)

Performs the |= operation.

impl BitOrAssign<isize> for isize

fn bitor_assign(&mut self, other: isize)

Performs the |= operation.

impl<'_> BitAndAssign<&'_ isize> for isize

fn bitand_assign(&mut self, other: &isize)

Performs the &= operation.

impl BitAndAssign<isize> for isize

fn bitand_assign(&mut self, other: isize)

Performs the &= operation.

impl<'a> Add<isize> for &'a isize

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

The resulting type after applying the + operator.

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

Performs the + operation.

impl<'_> Add<&'_ isize> for isize

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

The resulting type after applying the + operator.

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

Performs the + operation.

impl Add<isize> for isize

type Output = isize

The resulting type after applying the + operator.

fn add(self, other: isize) -> isize

Performs the + operation.

impl<'_, '_> Add<&'_ isize> for &'_ isize

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

The resulting type after applying the + operator.

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

Performs the + operation.

impl From<i16> for isize

Converts i16 to isize losslessly.

fn from(small: i16) -> isize

Performs the conversion.

impl From<bool> for isize

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

Examples

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

fn from(small: bool) -> isize

Performs the conversion.

impl From<NonZeroIsize> for isize

fn from(nonzero: NonZeroIsize) -> isize

Performs the conversion.

impl From<u8> for isize

Converts u8 to isize losslessly.

fn from(small: u8) -> isize

Performs the conversion.

impl From<i8> for isize

Converts i8 to isize losslessly.

fn from(small: i8) -> isize

Performs the conversion.

impl<'_> BitOr<&'_ isize> for isize

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

The resulting type after applying the | operator.

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

Performs the | operation.

impl BitOr<isize> for isize

type Output = isize

The resulting type after applying the | operator.

fn bitor(self, rhs: isize) -> isize

Performs the | operation.

impl<'a> BitOr<isize> for &'a isize

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

The resulting type after applying the | operator.

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

Performs the | operation.

impl<'_, '_> BitOr<&'_ isize> for &'_ isize

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

The resulting type after applying the | operator.

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

Performs the | operation.

impl Default for isize

fn default() -> isize

Returns the default value of 0

impl RemAssign<isize> for isize

fn rem_assign(&mut self, other: isize)

Performs the %= operation.

impl<'_> RemAssign<&'_ isize> for isize

fn rem_assign(&mut self, other: &isize)

Performs the %= operation.

impl DivAssign<isize> for isize

fn div_assign(&mut self, other: isize)

Performs the /= operation.

impl<'_> DivAssign<&'_ isize> for isize

fn div_assign(&mut self, other: &isize)

Performs the /= operation.

impl<'_> MulAssign<&'_ isize> for isize

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

Performs the *= operation.

impl MulAssign<isize> for isize

fn mul_assign(&mut self, other: isize)

Performs the *= operation.

impl UpperHex for isize

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

Formats the value using the given formatter.

impl SubAssign<isize> for isize

fn sub_assign(&mut self, other: isize)

Performs the -= operation.

impl<'_> SubAssign<&'_ isize> for isize

fn sub_assign(&mut self, other: &isize)

Performs the -= operation.

impl AddAssign<isize> for isize

fn add_assign(&mut self, other: isize)

Performs the += operation.

impl<'_> AddAssign<&'_ isize> for isize

fn add_assign(&mut self, other: &isize)

Performs the += operation.

impl Octal for isize

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

Formats the value using the given formatter.

impl<'_> Neg for &'_ isize

type Output = <isize as Neg>::Output

The resulting type after applying the - operator.

fn neg(self) -> <isize as Neg>::Output

Performs the unary - operation.

impl Neg for isize

type Output = isize

The resulting type after applying the - operator.

fn neg(self) -> isize

Performs the unary - operation.

impl Ord for isize

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

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

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

🔬 This is a nightly-only experimental API. (clamp #44095)

Restrict a value to a certain interval.

impl ShrAssign<u128> for isize

fn shr_assign(&mut self, other: u128)

Performs the >>= operation.

impl ShrAssign<i8> for isize

fn shr_assign(&mut self, other: i8)

Performs the >>= operation.

impl<'_> ShrAssign<&'_ u32> for isize

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

Performs the >>= operation.

impl<'_> ShrAssign<&'_ i8> for isize

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

Performs the >>= operation.

impl<'_> ShrAssign<&'_ i16> for isize

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

Performs the >>= operation.

impl ShrAssign<u16> for isize

fn shr_assign(&mut self, other: u16)

Performs the >>= operation.

impl<'_> ShrAssign<&'_ u128> for isize

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

Performs the >>= operation.

impl ShrAssign<i64> for isize

fn shr_assign(&mut self, other: i64)

Performs the >>= operation.

impl<'_> ShrAssign<&'_ u64> for isize

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

Performs the >>= operation.

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

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

Performs the >>= operation.

impl ShrAssign<usize> for isize

fn shr_assign(&mut self, other: usize)

Performs the >>= operation.

impl ShrAssign<i16> for isize

fn shr_assign(&mut self, other: i16)

Performs the >>= operation.

impl ShrAssign<i32> for isize

fn shr_assign(&mut self, other: i32)

Performs the >>= operation.

impl ShrAssign<u64> for isize

fn shr_assign(&mut self, other: u64)

Performs the >>= operation.

impl<'_> ShrAssign<&'_ i64> for isize

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

Performs the >>= operation.

impl ShrAssign<i128> for isize

fn shr_assign(&mut self, other: i128)

Performs the >>= operation.

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

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

Performs the >>= operation.

impl ShrAssign<u32> for isize

fn shr_assign(&mut self, other: u32)

Performs the >>= operation.

impl<'_> ShrAssign<&'_ u16> for isize

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

Performs the >>= operation.

impl ShrAssign<u8> for isize

fn shr_assign(&mut self, other: u8)

Performs the >>= operation.

impl<'_> ShrAssign<&'_ u8> for isize

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

Performs the >>= operation.

impl<'_> ShrAssign<&'_ i32> for isize

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

Performs the >>= operation.

impl<'_> ShrAssign<&'_ i128> for isize

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

Performs the >>= operation.

impl ShrAssign<isize> for isize

fn shr_assign(&mut self, other: isize)

Performs the >>= operation.

impl<'_, '_> Sub<&'_ isize> for &'_ isize

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

The resulting type after applying the - operator.

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

Performs the - operation.

impl<'a> Sub<isize> for &'a isize

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

The resulting type after applying the - operator.

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

Performs the - operation.

impl<'_> Sub<&'_ isize> for isize

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

The resulting type after applying the - operator.

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

Performs the - operation.

impl Sub<isize> for isize

type Output = isize

The resulting type after applying the - operator.

fn sub(self, other: isize) -> isize

Performs the - operation.

impl Eq for isize

impl PartialEq<isize> for isize

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

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

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

This method tests for !=.

impl<'_> Shr<&'_ i8> for isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl Shr<isize> for isize

type Output = isize

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl Shr<u16> for isize

type Output = isize

The resulting type after applying the >> operator.

fn shr(self, other: u16) -> isize

Performs the >> operation.

impl<'_, '_> Shr<&'_ u8> for &'_ isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_, '_> Shr<&'_ u64> for &'_ isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

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

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_, '_> Shr<&'_ u16> for &'_ isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'a> Shr<u64> for &'a isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_, '_> Shr<&'_ i32> for &'_ isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

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

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl Shr<usize> for isize

type Output = isize

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_, '_> Shr<&'_ i128> for &'_ isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl Shr<i32> for isize

type Output = isize

The resulting type after applying the >> operator.

fn shr(self, other: i32) -> isize

Performs the >> operation.

impl<'a> Shr<i32> for &'a isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_> Shr<&'_ i64> for isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_> Shr<&'_ u8> for isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

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

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'a> Shr<u128> for &'a isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'a> Shr<i64> for &'a isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_, '_> Shr<&'_ i16> for &'_ isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_> Shr<&'_ u128> for isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl Shr<i128> for isize

type Output = isize

The resulting type after applying the >> operator.

fn shr(self, other: i128) -> isize

Performs the >> operation.

impl<'a> Shr<u32> for &'a isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl Shr<i16> for isize

type Output = isize

The resulting type after applying the >> operator.

fn shr(self, other: i16) -> isize

Performs the >> operation.

impl Shr<i64> for isize

type Output = isize

The resulting type after applying the >> operator.

fn shr(self, other: i64) -> isize

Performs the >> operation.

impl<'_> Shr<&'_ i128> for isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'a> Shr<u8> for &'a isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl Shr<u64> for isize

type Output = isize

The resulting type after applying the >> operator.

fn shr(self, other: u64) -> isize

Performs the >> operation.

impl<'_, '_> Shr<&'_ u128> for &'_ isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_> Shr<&'_ u64> for isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_> Shr<&'_ u16> for isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'a> Shr<i8> for &'a isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl Shr<u128> for isize

type Output = isize

The resulting type after applying the >> operator.

fn shr(self, other: u128) -> isize

Performs the >> operation.

impl Shr<i8> for isize

type Output = isize

The resulting type after applying the >> operator.

fn shr(self, other: i8) -> isize

Performs the >> operation.

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

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'a> Shr<i128> for &'a isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_, '_> Shr<&'_ u32> for &'_ isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_> Shr<&'_ i16> for isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

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

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_> Shr<&'_ u32> for isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_> Shr<&'_ i32> for isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_, '_> Shr<&'_ i8> for &'_ isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

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

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'a> Shr<u16> for &'a isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'a> Shr<i16> for &'a isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl<'_, '_> Shr<&'_ i64> for &'_ isize

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

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl Shr<u32> for isize

type Output = isize

The resulting type after applying the >> operator.

fn shr(self, other: u32) -> isize

Performs the >> operation.

impl Shr<u8> for isize

type Output = isize

The resulting type after applying the >> operator.

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

Performs the >> operation.

impl BitXor<isize> for isize

type Output = isize

The resulting type after applying the ^ operator.

fn bitxor(self, other: isize) -> isize

Performs the ^ operation.

impl<'a> BitXor<isize> for &'a isize

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

The resulting type after applying the ^ operator.

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

Performs the ^ operation.

impl<'_, '_> BitXor<&'_ isize> for &'_ isize

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

The resulting type after applying the ^ operator.

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

Performs the ^ operation.

impl<'_> BitXor<&'_ isize> for isize

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

The resulting type after applying the ^ operator.

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

Performs the ^ operation.

impl Product<isize> for isize

fn product<I>(iter: I) -> isize where
    I: Iterator<Item = isize>, 

Method which takes an iterator and generates Self from the elements by multiplying the items.

impl<'a> Product<&'a isize> for isize

fn product<I>(iter: I) -> isize where
    I: Iterator<Item = &'a isize>, 

Method which takes an iterator and generates Self from the elements by multiplying the items.

impl<'_> Not for &'_ isize

type Output = <isize as Not>::Output

The resulting type after applying the ! operator.

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

Performs the unary ! operation.

impl Not for isize

type Output = isize

The resulting type after applying the ! operator.

fn not(self) -> isize

Performs the unary ! operation.

impl Copy for isize

impl Step for isize

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

🔬 This is a nightly-only experimental API. (step_trait #42168)

likely to be replaced by finer-grained traits

Returns the number of steps between two step objects. The count is inclusive of start and exclusive of end.

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

🔬 This is a nightly-only experimental API. (step_trait #42168)

likely to be replaced by finer-grained traits

Adds a usize, returning None on overflow.

fn replace_one(&mut self) -> isize

🔬 This is a nightly-only experimental API. (step_trait #42168)

likely to be replaced by finer-grained traits

Replaces this step with 1, returning itself.

fn replace_zero(&mut self) -> isize

🔬 This is a nightly-only experimental API. (step_trait #42168)

likely to be replaced by finer-grained traits

Replaces this step with 0, returning itself.

fn add_one(&self) -> isize

🔬 This is a nightly-only experimental API. (step_trait #42168)

likely to be replaced by finer-grained traits

Adds one to this step, returning the result.

fn sub_one(&self) -> isize

🔬 This is a nightly-only experimental API. (step_trait #42168)

likely to be replaced by finer-grained traits

Subtracts one to this step, returning the result.

impl Clone for isize

fn clone(&self) -> isize

Returns a copy of the value.

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

Performs copy-assignment from source.

impl LowerHex for isize

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

Formats the value using the given formatter.

impl PartialOrd<isize> for isize

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

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

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

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

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

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

This method tests greater than (for self and other) and is used by the > operator.

impl Display for isize

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

Formats the value using the given formatter.

impl<'_, '_> Rem<&'_ isize> for &'_ isize

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

The resulting type after applying the % operator.

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

Performs the % operation.

impl<'a> Rem<isize> for &'a isize

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

The resulting type after applying the % operator.

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

Performs the % operation.

impl<'_> Rem<&'_ isize> for isize

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

The resulting type after applying the % operator.

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

Performs the % operation.

impl Rem<isize> for isize

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

type Output = isize

The resulting type after applying the % operator.

fn rem(self, other: isize) -> isize

Performs the % operation.

impl<'_, '_> Mul<&'_ isize> for &'_ isize

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

The resulting type after applying the * operator.

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

Performs the * operation.

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

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

The resulting type after applying the * operator.

fn mul(self, other: isize) -> <isize as Mul<isize>>::Output

Performs the * operation.

impl<'_> Mul<&'_ isize> for isize

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

The resulting type after applying the * operator.

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

Performs the * operation.

impl Mul<isize> for isize

type Output = isize

The resulting type after applying the * operator.

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

Performs the * operation.

impl TryFrom<u32> for isize

type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(value: u32) -> Result<isize, <isize as TryFrom<u32>>::Error>

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

impl TryFrom<i64> for isize

type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(value: i64) -> Result<isize, <isize as TryFrom<i64>>::Error>

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

impl TryFrom<u128> for isize

type Error = TryFromIntError

The type returned in the event of a conversion error.

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

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 isize

type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(u: u64) -> Result<isize, TryFromIntError>

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<usize> for isize

type Error = TryFromIntError

The type returned in the event of a conversion error.

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

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 isize

type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(value: i32) -> Result<isize, <isize as TryFrom<i32>>::Error>

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

impl TryFrom<i128> for isize

type Error = TryFromIntError

The type returned in the event of a conversion error.

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

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<u16> for isize

type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(value: u16) -> Result<isize, <isize as TryFrom<u16>>::Error>

Try to create the target number type from a source number type. This returns an error if the source value is outside of the range of the target type.

impl Hash for isize

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

Feeds this value into the given [Hasher].

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

Feeds a slice of this type into the given [Hasher].

impl FromStr for isize

type Err = ParseIntError

The associated error which can be returned from parsing.

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

Parses a string s to return a value of this type.

impl<'_, '_> Shl<&'_ i64> for &'_ isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'_, '_> Shl<&'_ i16> for &'_ isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'_> Shl<&'_ u128> for isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'a> Shl<i8> for &'a isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'_> Shl<&'_ i16> for isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

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

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

The resulting type after applying the << operator.

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

Performs the << operation.

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

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'a> Shl<u128> for &'a isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

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

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl Shl<u128> for isize

type Output = isize

The resulting type after applying the << operator.

fn shl(self, other: u128) -> isize

Performs the << operation.

impl<'_> Shl<&'_ i32> for isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'_> Shl<&'_ i64> for isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'_, '_> Shl<&'_ i128> for &'_ isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'_, '_> Shl<&'_ u128> for &'_ isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'_, '_> Shl<&'_ u64> for &'_ isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl Shl<u8> for isize

type Output = isize

The resulting type after applying the << operator.

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

Performs the << operation.

impl Shl<isize> for isize

type Output = isize

The resulting type after applying the << operator.

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

Performs the << operation.

impl Shl<u32> for isize

type Output = isize

The resulting type after applying the << operator.

fn shl(self, other: u32) -> isize

Performs the << operation.

impl<'_, '_> Shl<&'_ u16> for &'_ isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'_> Shl<&'_ i128> for isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'a> Shl<u64> for &'a isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'a> Shl<u8> for &'a isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'_, '_> Shl<&'_ i32> for &'_ isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl Shl<usize> for isize

type Output = isize

The resulting type after applying the << operator.

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

Performs the << operation.

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

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl Shl<i64> for isize

type Output = isize

The resulting type after applying the << operator.

fn shl(self, other: i64) -> isize

Performs the << operation.

impl<'_> Shl<&'_ u8> for isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl Shl<i32> for isize

type Output = isize

The resulting type after applying the << operator.

fn shl(self, other: i32) -> isize

Performs the << operation.

impl<'_, '_> Shl<&'_ i8> for &'_ isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl Shl<u16> for isize

type Output = isize

The resulting type after applying the << operator.

fn shl(self, other: u16) -> isize

Performs the << operation.

impl Shl<i128> for isize

type Output = isize

The resulting type after applying the << operator.

fn shl(self, other: i128) -> isize

Performs the << operation.

impl<'a> Shl<i16> for &'a isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'_> Shl<&'_ u64> for isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl Shl<i16> for isize

type Output = isize

The resulting type after applying the << operator.

fn shl(self, other: i16) -> isize

Performs the << operation.

impl<'_, '_> Shl<&'_ u32> for &'_ isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'a> Shl<u32> for &'a isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'a> Shl<u16> for &'a isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'_> Shl<&'_ u32> for isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'_> Shl<&'_ u16> for isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl Shl<u64> for isize

type Output = isize

The resulting type after applying the << operator.

fn shl(self, other: u64) -> isize

Performs the << operation.

impl Shl<i8> for isize

type Output = isize

The resulting type after applying the << operator.

fn shl(self, other: i8) -> isize

Performs the << operation.

impl<'_> Shl<&'_ i8> for isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

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

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'a> Shl<i128> for &'a isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'a> Shl<i64> for &'a isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'_, '_> Shl<&'_ u8> for &'_ isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

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

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'a> Shl<i32> for &'a isize

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

The resulting type after applying the << operator.

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

Performs the << operation.

impl<'_> BitAnd<&'_ isize> for isize

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

The resulting type after applying the & operator.

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

Performs the & operation.

impl<'a> BitAnd<isize> for &'a isize

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

The resulting type after applying the & operator.

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

Performs the & operation.

impl BitAnd<isize> for isize

type Output = isize

The resulting type after applying the & operator.

fn bitand(self, rhs: isize) -> isize

Performs the & operation.

impl<'_, '_> BitAnd<&'_ isize> for &'_ isize

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

The resulting type after applying the & operator.

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

Performs the & operation.

impl Sum<isize> for isize

fn sum<I>(iter: I) -> isize where
    I: Iterator<Item = isize>, 

Method which takes an iterator and generates Self from the elements by "summing up" the items.

impl<'a> Sum<&'a isize> for isize

fn sum<I>(iter: I) -> isize where
    I: Iterator<Item = &'a isize>, 

Method which takes an iterator and generates Self from the elements by "summing up" the items.

impl Binary for isize

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

Formats the value using the given formatter.

impl Debug for isize

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

Formats the value using the given formatter.

impl<'_> ShlAssign<&'_ u64> for isize

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

Performs the <<= operation.

impl ShlAssign<i8> for isize

fn shl_assign(&mut self, other: i8)

Performs the <<= operation.

impl<'_> ShlAssign<&'_ u16> for isize

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

Performs the <<= operation.

impl<'_> ShlAssign<&'_ i128> for isize

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

Performs the <<= operation.

impl ShlAssign<i64> for isize

fn shl_assign(&mut self, other: i64)

Performs the <<= operation.

impl<'_> ShlAssign<&'_ u8> for isize

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

Performs the <<= operation.

impl ShlAssign<i32> for isize

fn shl_assign(&mut self, other: i32)

Performs the <<= operation.

impl ShlAssign<i128> for isize

fn shl_assign(&mut self, other: i128)

Performs the <<= operation.

impl<'_> ShlAssign<&'_ i8> for isize

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

Performs the <<= operation.

impl ShlAssign<u16> for isize

fn shl_assign(&mut self, other: u16)

Performs the <<= operation.

impl<'_> ShlAssign<&'_ i16> for isize

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

Performs the <<= operation.

impl ShlAssign<usize> for isize

fn shl_assign(&mut self, other: usize)

Performs the <<= operation.

impl ShlAssign<isize> for isize

fn shl_assign(&mut self, other: isize)

Performs the <<= operation.

impl<'_> ShlAssign<&'_ u128> for isize

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

Performs the <<= operation.

impl ShlAssign<u8> for isize

fn shl_assign(&mut self, other: u8)

Performs the <<= operation.

impl ShlAssign<u64> for isize

fn shl_assign(&mut self, other: u64)

Performs the <<= operation.

impl ShlAssign<u32> for isize

fn shl_assign(&mut self, other: u32)

Performs the <<= operation.

impl<'_> ShlAssign<&'_ i32> for isize

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

Performs the <<= operation.

impl ShlAssign<i16> for isize

fn shl_assign(&mut self, other: i16)

Performs the <<= operation.

impl<'_> ShlAssign<&'_ i64> for isize

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

Performs the <<= operation.

impl<'_> ShlAssign<&'_ u32> for isize

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

Performs the <<= operation.

impl ShlAssign<u128> for isize

fn shl_assign(&mut self, other: u128)

Performs the <<= operation.

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

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

Performs the <<= operation.

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

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

Performs the <<= operation.

impl<'a> Div<isize> for &'a isize

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

The resulting type after applying the / operator.

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

Performs the / operation.

impl<'_> Div<&'_ isize> for isize

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

The resulting type after applying the / operator.

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

Performs the / operation.

impl Div<isize> for isize

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

type Output = isize

The resulting type after applying the / operator.

fn div(self, other: isize) -> isize

Performs the / operation.

impl<'_, '_> Div<&'_ isize> for &'_ isize

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

The resulting type after applying the / operator.

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

Performs the / operation.