Struct NonZero

pub struct NonZero<T: ZeroablePrimitive>(/* private fields */);

A value that is known not to equal zero.

This enables some memory layout optimization. For example, Option<NonZero<u32>> is the same size as u32:

use core::{mem::size_of, num::NonZero};

assert_eq!(size_of::<Option<NonZero<u32>>>(), size_of::<u32>());

Implementations

impl<T> NonZero<T>

where T: ZeroablePrimitive,

pub const fn new(n: T) -> Option<Self>

Creates a non-zero if the given value is not zero.

pub const unsafe fn new_unchecked(n: T) -> Self

Creates a non-zero without checking whether the value is non-zero. This results in undefined behavior if the value is zero.

Safety

The value must not be zero.

pub fn from_mut(n: &mut T) -> Option<&mut Self>

🔬This is a nightly-only experimental API. (nonzero_from_mut #106290)

Converts a reference to a non-zero mutable reference if the referenced value is not zero.

pub unsafe fn from_mut_unchecked(n: &mut T) -> &mut Self

🔬This is a nightly-only experimental API. (nonzero_from_mut #106290)

Converts a mutable reference to a non-zero mutable reference without checking whether the referenced value is non-zero. This results in undefined behavior if the referenced value is zero.

Safety

The referenced value must not be zero.

pub const fn get(self) -> T

Returns the contained value as a primitive type.

impl NonZero<u8>

pub const BITS: u32 = 8u32

The size of this non-zero integer type in bits.

This value is equal to u8::BITS.

Examples

assert_eq!(NonZero::<u8>::BITS, u8::BITS);

pub const MIN: Self

The smallest value that can be represented by this non-zero integer type, 1.

Examples

assert_eq!(NonZero::<u8>::MIN.get(), 1u8);

pub const MAX: Self

The largest value that can be represented by this non-zero integer type, equal to u8::MAX.

Examples

assert_eq!(NonZero::<u8>::MAX.get(), u8::MAX);

pub const fn leading_zeros(self) -> u32

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

On many architectures, this function can perform better than leading_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<u8>::new(u8::MAX)?;

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.

On many architectures, this function can perform better than trailing_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<u8>::new(0b0101000)?;

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

pub const fn count_ones(self) -> NonZero<u32>

🔬This is a nightly-only experimental API. (non_zero_count_ones #120287)

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

Examples

Basic usage:

#![feature(non_zero_count_ones)]

let a = NonZero::<u8>::new(0b100_0000)?;
let b = NonZero::<u8>::new(0b100_0011)?;

assert_eq!(a.count_ones(), NonZero::new(1)?);
assert_eq!(b.count_ones(), NonZero::new(3)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x82u8)?;
let m = NonZero::new(0xa)?;

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

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0xau8)?;
let m = NonZero::new(0x82)?;

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

pub const fn swap_bytes(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

Reverses the byte order of the integer.

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x12u8)?;
let m = n.swap_bytes();

assert_eq!(m, NonZero::new(0x12)?);

pub const fn reverse_bits(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x12u8)?;
let m = n.reverse_bits();

assert_eq!(m, NonZero::new(0x48)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroU8;
let n = NonZero::new(0x1Au8)?;

if cfg!(target_endian = "big") {
    assert_eq!(NonZeroU8::from_be(n), n)
} else {
    assert_eq!(NonZeroU8::from_be(n), n.swap_bytes())
}

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroU8;
let n = NonZero::new(0x1Au8)?;

if cfg!(target_endian = "little") {
    assert_eq!(NonZeroU8::from_le(n), n)
} else {
    assert_eq!(NonZeroU8::from_le(n), n.swap_bytes())
}

pub const fn to_be(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Au8)?;

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) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Au8)?;

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

pub const fn checked_add(self, other: u8) -> Option<Self>

Adds an unsigned integer to a non-zero value. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let one = NonZero::new(1u8)?;
let two = NonZero::new(2u8)?;
let max = NonZero::new(u8::MAX)?;

assert_eq!(Some(two), one.checked_add(1));
assert_eq!(None, max.checked_add(1));

pub const fn saturating_add(self, other: u8) -> Self

Adds an unsigned integer to a non-zero value. Return NonZero::<u8>::MAX on overflow.

Examples

let one = NonZero::new(1u8)?;
let two = NonZero::new(2u8)?;
let max = NonZero::new(u8::MAX)?;

assert_eq!(two, one.saturating_add(1));
assert_eq!(max, max.saturating_add(1));

pub const unsafe fn unchecked_add(self, other: u8) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Adds an unsigned integer to a non-zero value, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self + rhs > u8::MAX.

Examples

#![feature(nonzero_ops)]

let one = NonZero::new(1u8)?;
let two = NonZero::new(2u8)?;

assert_eq!(two, unsafe { one.unchecked_add(1) });

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

Returns the smallest power of two greater than or equal to self. Checks for overflow and returns None if the next power of two is greater than the type’s maximum value. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2u8)?;
let three = NonZero::new(3u8)?;
let four = NonZero::new(4u8)?;
let max = NonZero::new(u8::MAX)?;

assert_eq!(Some(two), two.checked_next_power_of_two() );
assert_eq!(Some(four), three.checked_next_power_of_two() );
assert_eq!(None, max.checked_next_power_of_two() );

pub const fn ilog2(self) -> u32

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

This is the same operation as u8::ilog2, except that it has no failure cases to worry about since this value can never be zero.

Examples

assert_eq!(NonZero::new(7u8)?.ilog2(), 2);
assert_eq!(NonZero::new(8u8)?.ilog2(), 3);
assert_eq!(NonZero::new(9u8)?.ilog2(), 3);

pub const fn ilog10(self) -> u32

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

This is the same operation as u8::ilog10, except that it has no failure cases to worry about since this value can never be zero.

Examples

assert_eq!(NonZero::new(99u8)?.ilog10(), 1);
assert_eq!(NonZero::new(100u8)?.ilog10(), 2);
assert_eq!(NonZero::new(101u8)?.ilog10(), 2);

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

Calculates the middle point of self and rhs.

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

Examples

let one = NonZero::new(1u8)?;
let two = NonZero::new(2u8)?;
let four = NonZero::new(4u8)?;

assert_eq!(one.midpoint(four), two);
assert_eq!(four.midpoint(one), two);

pub const fn is_power_of_two(self) -> bool

Returns true if and only if self == (1 << k) for some k.

On many architectures, this function can perform better than is_power_of_two() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let eight = NonZero::new(8u8)?;
assert!(eight.is_power_of_two());
let ten = NonZero::new(10u8)?;
assert!(!ten.is_power_of_two());

pub const fn isqrt(self) -> Self

Returns the square root of the number, rounded down.

Examples

Basic usage:

let ten = NonZero::new(10u8)?;
let three = NonZero::new(3u8)?;

assert_eq!(ten.isqrt(), three);

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

Multiplies two non-zero integers together. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2u8)?;
let four = NonZero::new(4u8)?;
let max = NonZero::new(u8::MAX)?;

assert_eq!(Some(four), two.checked_mul(two));
assert_eq!(None, max.checked_mul(two));

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

Multiplies two non-zero integers together. Return NonZero::<u8>::MAX on overflow.

Examples

let two = NonZero::new(2u8)?;
let four = NonZero::new(4u8)?;
let max = NonZero::new(u8::MAX)?;

assert_eq!(four, two.saturating_mul(two));
assert_eq!(max, four.saturating_mul(max));

pub const unsafe fn unchecked_mul(self, other: Self) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Multiplies two non-zero integers together, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self * rhs > u8::MAX.

Examples

#![feature(nonzero_ops)]

let two = NonZero::new(2u8)?;
let four = NonZero::new(4u8)?;

assert_eq!(four, unsafe { two.unchecked_mul(two) });

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

Raises non-zero value to an integer power. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let three = NonZero::new(3u8)?;
let twenty_seven = NonZero::new(27u8)?;
let half_max = NonZero::new(u8::MAX / 2)?;

assert_eq!(Some(twenty_seven), three.checked_pow(3));
assert_eq!(None, half_max.checked_pow(3));

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

Raise non-zero value to an integer power. Return NonZero::<u8>::MAX on overflow.

Examples

let three = NonZero::new(3u8)?;
let twenty_seven = NonZero::new(27u8)?;
let max = NonZero::new(u8::MAX)?;

assert_eq!(twenty_seven, three.saturating_pow(3));
assert_eq!(max, max.saturating_pow(3));

impl NonZero<u8>

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

🔬This is a nightly-only experimental API. (unsigned_nonzero_div_ceil #132968)

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

The result is guaranteed to be non-zero.

Examples

let one = NonZero::new(1u8).unwrap();
let max = NonZero::new(u8::MAX).unwrap();
assert_eq!(one.div_ceil(max), one);

let two = NonZero::new(2u8).unwrap();
let three = NonZero::new(3u8).unwrap();
assert_eq!(three.div_ceil(two), two);

impl NonZero<u16>

pub const BITS: u32 = 16u32

The size of this non-zero integer type in bits.

This value is equal to u16::BITS.

Examples

assert_eq!(NonZero::<u16>::BITS, u16::BITS);

pub const MIN: Self

The smallest value that can be represented by this non-zero integer type, 1.

Examples

assert_eq!(NonZero::<u16>::MIN.get(), 1u16);

pub const MAX: Self

The largest value that can be represented by this non-zero integer type, equal to u16::MAX.

Examples

assert_eq!(NonZero::<u16>::MAX.get(), u16::MAX);

pub const fn leading_zeros(self) -> u32

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

On many architectures, this function can perform better than leading_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<u16>::new(u16::MAX)?;

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.

On many architectures, this function can perform better than trailing_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<u16>::new(0b0101000)?;

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

pub const fn count_ones(self) -> NonZero<u32>

🔬This is a nightly-only experimental API. (non_zero_count_ones #120287)

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

Examples

Basic usage:

#![feature(non_zero_count_ones)]

let a = NonZero::<u16>::new(0b100_0000)?;
let b = NonZero::<u16>::new(0b100_0011)?;

assert_eq!(a.count_ones(), NonZero::new(1)?);
assert_eq!(b.count_ones(), NonZero::new(3)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0xa003u16)?;
let m = NonZero::new(0x3a)?;

assert_eq!(n.rotate_left(4), m);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x3au16)?;
let m = NonZero::new(0xa003)?;

assert_eq!(n.rotate_right(4), m);

pub const fn swap_bytes(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

Reverses the byte order of the integer.

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1234u16)?;
let m = n.swap_bytes();

assert_eq!(m, NonZero::new(0x3412)?);

pub const fn reverse_bits(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1234u16)?;
let m = n.reverse_bits();

assert_eq!(m, NonZero::new(0x2c48)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroU16;
let n = NonZero::new(0x1Au16)?;

if cfg!(target_endian = "big") {
    assert_eq!(NonZeroU16::from_be(n), n)
} else {
    assert_eq!(NonZeroU16::from_be(n), n.swap_bytes())
}

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroU16;
let n = NonZero::new(0x1Au16)?;

if cfg!(target_endian = "little") {
    assert_eq!(NonZeroU16::from_le(n), n)
} else {
    assert_eq!(NonZeroU16::from_le(n), n.swap_bytes())
}

pub const fn to_be(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Au16)?;

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) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Au16)?;

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

pub const fn checked_add(self, other: u16) -> Option<Self>

Adds an unsigned integer to a non-zero value. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let one = NonZero::new(1u16)?;
let two = NonZero::new(2u16)?;
let max = NonZero::new(u16::MAX)?;

assert_eq!(Some(two), one.checked_add(1));
assert_eq!(None, max.checked_add(1));

pub const fn saturating_add(self, other: u16) -> Self

Adds an unsigned integer to a non-zero value. Return NonZero::<u16>::MAX on overflow.

Examples

let one = NonZero::new(1u16)?;
let two = NonZero::new(2u16)?;
let max = NonZero::new(u16::MAX)?;

assert_eq!(two, one.saturating_add(1));
assert_eq!(max, max.saturating_add(1));

pub const unsafe fn unchecked_add(self, other: u16) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Adds an unsigned integer to a non-zero value, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self + rhs > u16::MAX.

Examples

#![feature(nonzero_ops)]

let one = NonZero::new(1u16)?;
let two = NonZero::new(2u16)?;

assert_eq!(two, unsafe { one.unchecked_add(1) });

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

Returns the smallest power of two greater than or equal to self. Checks for overflow and returns None if the next power of two is greater than the type’s maximum value. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2u16)?;
let three = NonZero::new(3u16)?;
let four = NonZero::new(4u16)?;
let max = NonZero::new(u16::MAX)?;

assert_eq!(Some(two), two.checked_next_power_of_two() );
assert_eq!(Some(four), three.checked_next_power_of_two() );
assert_eq!(None, max.checked_next_power_of_two() );

pub const fn ilog2(self) -> u32

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

This is the same operation as u16::ilog2, except that it has no failure cases to worry about since this value can never be zero.

Examples

assert_eq!(NonZero::new(7u16)?.ilog2(), 2);
assert_eq!(NonZero::new(8u16)?.ilog2(), 3);
assert_eq!(NonZero::new(9u16)?.ilog2(), 3);

pub const fn ilog10(self) -> u32

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

This is the same operation as u16::ilog10, except that it has no failure cases to worry about since this value can never be zero.

Examples

assert_eq!(NonZero::new(99u16)?.ilog10(), 1);
assert_eq!(NonZero::new(100u16)?.ilog10(), 2);
assert_eq!(NonZero::new(101u16)?.ilog10(), 2);

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

Calculates the middle point of self and rhs.

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

Examples

let one = NonZero::new(1u16)?;
let two = NonZero::new(2u16)?;
let four = NonZero::new(4u16)?;

assert_eq!(one.midpoint(four), two);
assert_eq!(four.midpoint(one), two);

pub const fn is_power_of_two(self) -> bool

Returns true if and only if self == (1 << k) for some k.

On many architectures, this function can perform better than is_power_of_two() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let eight = NonZero::new(8u16)?;
assert!(eight.is_power_of_two());
let ten = NonZero::new(10u16)?;
assert!(!ten.is_power_of_two());

pub const fn isqrt(self) -> Self

Returns the square root of the number, rounded down.

Examples

Basic usage:

let ten = NonZero::new(10u16)?;
let three = NonZero::new(3u16)?;

assert_eq!(ten.isqrt(), three);

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

Multiplies two non-zero integers together. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2u16)?;
let four = NonZero::new(4u16)?;
let max = NonZero::new(u16::MAX)?;

assert_eq!(Some(four), two.checked_mul(two));
assert_eq!(None, max.checked_mul(two));

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

Multiplies two non-zero integers together. Return NonZero::<u16>::MAX on overflow.

Examples

let two = NonZero::new(2u16)?;
let four = NonZero::new(4u16)?;
let max = NonZero::new(u16::MAX)?;

assert_eq!(four, two.saturating_mul(two));
assert_eq!(max, four.saturating_mul(max));

pub const unsafe fn unchecked_mul(self, other: Self) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Multiplies two non-zero integers together, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self * rhs > u16::MAX.

Examples

#![feature(nonzero_ops)]

let two = NonZero::new(2u16)?;
let four = NonZero::new(4u16)?;

assert_eq!(four, unsafe { two.unchecked_mul(two) });

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

Raises non-zero value to an integer power. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let three = NonZero::new(3u16)?;
let twenty_seven = NonZero::new(27u16)?;
let half_max = NonZero::new(u16::MAX / 2)?;

assert_eq!(Some(twenty_seven), three.checked_pow(3));
assert_eq!(None, half_max.checked_pow(3));

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

Raise non-zero value to an integer power. Return NonZero::<u16>::MAX on overflow.

Examples

let three = NonZero::new(3u16)?;
let twenty_seven = NonZero::new(27u16)?;
let max = NonZero::new(u16::MAX)?;

assert_eq!(twenty_seven, three.saturating_pow(3));
assert_eq!(max, max.saturating_pow(3));

impl NonZero<u16>

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

🔬This is a nightly-only experimental API. (unsigned_nonzero_div_ceil #132968)

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

The result is guaranteed to be non-zero.

Examples

let one = NonZero::new(1u16).unwrap();
let max = NonZero::new(u16::MAX).unwrap();
assert_eq!(one.div_ceil(max), one);

let two = NonZero::new(2u16).unwrap();
let three = NonZero::new(3u16).unwrap();
assert_eq!(three.div_ceil(two), two);

impl NonZero<u32>

pub const BITS: u32 = 32u32

The size of this non-zero integer type in bits.

This value is equal to u32::BITS.

Examples

assert_eq!(NonZero::<u32>::BITS, u32::BITS);

pub const MIN: Self

The smallest value that can be represented by this non-zero integer type, 1.

Examples

assert_eq!(NonZero::<u32>::MIN.get(), 1u32);

pub const MAX: Self

The largest value that can be represented by this non-zero integer type, equal to u32::MAX.

Examples

assert_eq!(NonZero::<u32>::MAX.get(), u32::MAX);

pub const fn leading_zeros(self) -> u32

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

On many architectures, this function can perform better than leading_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<u32>::new(u32::MAX)?;

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.

On many architectures, this function can perform better than trailing_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<u32>::new(0b0101000)?;

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

pub const fn count_ones(self) -> NonZero<u32>

🔬This is a nightly-only experimental API. (non_zero_count_ones #120287)

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

Examples

Basic usage:

#![feature(non_zero_count_ones)]

let a = NonZero::<u32>::new(0b100_0000)?;
let b = NonZero::<u32>::new(0b100_0011)?;

assert_eq!(a.count_ones(), NonZero::new(1)?);
assert_eq!(b.count_ones(), NonZero::new(3)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x10000b3u32)?;
let m = NonZero::new(0xb301)?;

assert_eq!(n.rotate_left(8), m);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0xb301u32)?;
let m = NonZero::new(0x10000b3)?;

assert_eq!(n.rotate_right(8), m);

pub const fn swap_bytes(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

Reverses the byte order of the integer.

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x12345678u32)?;
let m = n.swap_bytes();

assert_eq!(m, NonZero::new(0x78563412)?);

pub const fn reverse_bits(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x12345678u32)?;
let m = n.reverse_bits();

assert_eq!(m, NonZero::new(0x1e6a2c48)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroU32;
let n = NonZero::new(0x1Au32)?;

if cfg!(target_endian = "big") {
    assert_eq!(NonZeroU32::from_be(n), n)
} else {
    assert_eq!(NonZeroU32::from_be(n), n.swap_bytes())
}

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroU32;
let n = NonZero::new(0x1Au32)?;

if cfg!(target_endian = "little") {
    assert_eq!(NonZeroU32::from_le(n), n)
} else {
    assert_eq!(NonZeroU32::from_le(n), n.swap_bytes())
}

pub const fn to_be(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Au32)?;

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) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Au32)?;

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

pub const fn checked_add(self, other: u32) -> Option<Self>

Adds an unsigned integer to a non-zero value. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let one = NonZero::new(1u32)?;
let two = NonZero::new(2u32)?;
let max = NonZero::new(u32::MAX)?;

assert_eq!(Some(two), one.checked_add(1));
assert_eq!(None, max.checked_add(1));

pub const fn saturating_add(self, other: u32) -> Self

Adds an unsigned integer to a non-zero value. Return NonZero::<u32>::MAX on overflow.

Examples

let one = NonZero::new(1u32)?;
let two = NonZero::new(2u32)?;
let max = NonZero::new(u32::MAX)?;

assert_eq!(two, one.saturating_add(1));
assert_eq!(max, max.saturating_add(1));

pub const unsafe fn unchecked_add(self, other: u32) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Adds an unsigned integer to a non-zero value, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self + rhs > u32::MAX.

Examples

#![feature(nonzero_ops)]

let one = NonZero::new(1u32)?;
let two = NonZero::new(2u32)?;

assert_eq!(two, unsafe { one.unchecked_add(1) });

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

Returns the smallest power of two greater than or equal to self. Checks for overflow and returns None if the next power of two is greater than the type’s maximum value. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2u32)?;
let three = NonZero::new(3u32)?;
let four = NonZero::new(4u32)?;
let max = NonZero::new(u32::MAX)?;

assert_eq!(Some(two), two.checked_next_power_of_two() );
assert_eq!(Some(four), three.checked_next_power_of_two() );
assert_eq!(None, max.checked_next_power_of_two() );

pub const fn ilog2(self) -> u32

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

This is the same operation as u32::ilog2, except that it has no failure cases to worry about since this value can never be zero.

Examples

assert_eq!(NonZero::new(7u32)?.ilog2(), 2);
assert_eq!(NonZero::new(8u32)?.ilog2(), 3);
assert_eq!(NonZero::new(9u32)?.ilog2(), 3);

pub const fn ilog10(self) -> u32

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

This is the same operation as u32::ilog10, except that it has no failure cases to worry about since this value can never be zero.

Examples

assert_eq!(NonZero::new(99u32)?.ilog10(), 1);
assert_eq!(NonZero::new(100u32)?.ilog10(), 2);
assert_eq!(NonZero::new(101u32)?.ilog10(), 2);

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

Calculates the middle point of self and rhs.

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

Examples

let one = NonZero::new(1u32)?;
let two = NonZero::new(2u32)?;
let four = NonZero::new(4u32)?;

assert_eq!(one.midpoint(four), two);
assert_eq!(four.midpoint(one), two);

pub const fn is_power_of_two(self) -> bool

Returns true if and only if self == (1 << k) for some k.

On many architectures, this function can perform better than is_power_of_two() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let eight = NonZero::new(8u32)?;
assert!(eight.is_power_of_two());
let ten = NonZero::new(10u32)?;
assert!(!ten.is_power_of_two());

pub const fn isqrt(self) -> Self

Returns the square root of the number, rounded down.

Examples

Basic usage:

let ten = NonZero::new(10u32)?;
let three = NonZero::new(3u32)?;

assert_eq!(ten.isqrt(), three);

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

Multiplies two non-zero integers together. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2u32)?;
let four = NonZero::new(4u32)?;
let max = NonZero::new(u32::MAX)?;

assert_eq!(Some(four), two.checked_mul(two));
assert_eq!(None, max.checked_mul(two));

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

Multiplies two non-zero integers together. Return NonZero::<u32>::MAX on overflow.

Examples

let two = NonZero::new(2u32)?;
let four = NonZero::new(4u32)?;
let max = NonZero::new(u32::MAX)?;

assert_eq!(four, two.saturating_mul(two));
assert_eq!(max, four.saturating_mul(max));

pub const unsafe fn unchecked_mul(self, other: Self) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Multiplies two non-zero integers together, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self * rhs > u32::MAX.

Examples

#![feature(nonzero_ops)]

let two = NonZero::new(2u32)?;
let four = NonZero::new(4u32)?;

assert_eq!(four, unsafe { two.unchecked_mul(two) });

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

Raises non-zero value to an integer power. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let three = NonZero::new(3u32)?;
let twenty_seven = NonZero::new(27u32)?;
let half_max = NonZero::new(u32::MAX / 2)?;

assert_eq!(Some(twenty_seven), three.checked_pow(3));
assert_eq!(None, half_max.checked_pow(3));

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

Raise non-zero value to an integer power. Return NonZero::<u32>::MAX on overflow.

Examples

let three = NonZero::new(3u32)?;
let twenty_seven = NonZero::new(27u32)?;
let max = NonZero::new(u32::MAX)?;

assert_eq!(twenty_seven, three.saturating_pow(3));
assert_eq!(max, max.saturating_pow(3));

impl NonZero<u32>

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

🔬This is a nightly-only experimental API. (unsigned_nonzero_div_ceil #132968)

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

The result is guaranteed to be non-zero.

Examples

let one = NonZero::new(1u32).unwrap();
let max = NonZero::new(u32::MAX).unwrap();
assert_eq!(one.div_ceil(max), one);

let two = NonZero::new(2u32).unwrap();
let three = NonZero::new(3u32).unwrap();
assert_eq!(three.div_ceil(two), two);

impl NonZero<u64>

pub const BITS: u32 = 64u32

The size of this non-zero integer type in bits.

This value is equal to u64::BITS.

Examples

assert_eq!(NonZero::<u64>::BITS, u64::BITS);

pub const MIN: Self

The smallest value that can be represented by this non-zero integer type, 1.

Examples

assert_eq!(NonZero::<u64>::MIN.get(), 1u64);

pub const MAX: Self

The largest value that can be represented by this non-zero integer type, equal to u64::MAX.

Examples

assert_eq!(NonZero::<u64>::MAX.get(), u64::MAX);

pub const fn leading_zeros(self) -> u32

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

On many architectures, this function can perform better than leading_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<u64>::new(u64::MAX)?;

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.

On many architectures, this function can perform better than trailing_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<u64>::new(0b0101000)?;

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

pub const fn count_ones(self) -> NonZero<u32>

🔬This is a nightly-only experimental API. (non_zero_count_ones #120287)

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

Examples

Basic usage:

#![feature(non_zero_count_ones)]

let a = NonZero::<u64>::new(0b100_0000)?;
let b = NonZero::<u64>::new(0b100_0011)?;

assert_eq!(a.count_ones(), NonZero::new(1)?);
assert_eq!(b.count_ones(), NonZero::new(3)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0xaa00000000006e1u64)?;
let m = NonZero::new(0x6e10aa)?;

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

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x6e10aau64)?;
let m = NonZero::new(0xaa00000000006e1)?;

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

pub const fn swap_bytes(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

Reverses the byte order of the integer.

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1234567890123456u64)?;
let m = n.swap_bytes();

assert_eq!(m, NonZero::new(0x5634129078563412)?);

pub const fn reverse_bits(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1234567890123456u64)?;
let m = n.reverse_bits();

assert_eq!(m, NonZero::new(0x6a2c48091e6a2c48)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroU64;
let n = NonZero::new(0x1Au64)?;

if cfg!(target_endian = "big") {
    assert_eq!(NonZeroU64::from_be(n), n)
} else {
    assert_eq!(NonZeroU64::from_be(n), n.swap_bytes())
}

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroU64;
let n = NonZero::new(0x1Au64)?;

if cfg!(target_endian = "little") {
    assert_eq!(NonZeroU64::from_le(n), n)
} else {
    assert_eq!(NonZeroU64::from_le(n), n.swap_bytes())
}

pub const fn to_be(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Au64)?;

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) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Au64)?;

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

pub const fn checked_add(self, other: u64) -> Option<Self>

Adds an unsigned integer to a non-zero value. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let one = NonZero::new(1u64)?;
let two = NonZero::new(2u64)?;
let max = NonZero::new(u64::MAX)?;

assert_eq!(Some(two), one.checked_add(1));
assert_eq!(None, max.checked_add(1));

pub const fn saturating_add(self, other: u64) -> Self

Adds an unsigned integer to a non-zero value. Return NonZero::<u64>::MAX on overflow.

Examples

let one = NonZero::new(1u64)?;
let two = NonZero::new(2u64)?;
let max = NonZero::new(u64::MAX)?;

assert_eq!(two, one.saturating_add(1));
assert_eq!(max, max.saturating_add(1));

pub const unsafe fn unchecked_add(self, other: u64) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Adds an unsigned integer to a non-zero value, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self + rhs > u64::MAX.

Examples

#![feature(nonzero_ops)]

let one = NonZero::new(1u64)?;
let two = NonZero::new(2u64)?;

assert_eq!(two, unsafe { one.unchecked_add(1) });

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

Returns the smallest power of two greater than or equal to self. Checks for overflow and returns None if the next power of two is greater than the type’s maximum value. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2u64)?;
let three = NonZero::new(3u64)?;
let four = NonZero::new(4u64)?;
let max = NonZero::new(u64::MAX)?;

assert_eq!(Some(two), two.checked_next_power_of_two() );
assert_eq!(Some(four), three.checked_next_power_of_two() );
assert_eq!(None, max.checked_next_power_of_two() );

pub const fn ilog2(self) -> u32

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

This is the same operation as u64::ilog2, except that it has no failure cases to worry about since this value can never be zero.

Examples

assert_eq!(NonZero::new(7u64)?.ilog2(), 2);
assert_eq!(NonZero::new(8u64)?.ilog2(), 3);
assert_eq!(NonZero::new(9u64)?.ilog2(), 3);

pub const fn ilog10(self) -> u32

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

This is the same operation as u64::ilog10, except that it has no failure cases to worry about since this value can never be zero.

Examples

assert_eq!(NonZero::new(99u64)?.ilog10(), 1);
assert_eq!(NonZero::new(100u64)?.ilog10(), 2);
assert_eq!(NonZero::new(101u64)?.ilog10(), 2);

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

Calculates the middle point of self and rhs.

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

Examples

let one = NonZero::new(1u64)?;
let two = NonZero::new(2u64)?;
let four = NonZero::new(4u64)?;

assert_eq!(one.midpoint(four), two);
assert_eq!(four.midpoint(one), two);

pub const fn is_power_of_two(self) -> bool

Returns true if and only if self == (1 << k) for some k.

On many architectures, this function can perform better than is_power_of_two() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let eight = NonZero::new(8u64)?;
assert!(eight.is_power_of_two());
let ten = NonZero::new(10u64)?;
assert!(!ten.is_power_of_two());

pub const fn isqrt(self) -> Self

Returns the square root of the number, rounded down.

Examples

Basic usage:

let ten = NonZero::new(10u64)?;
let three = NonZero::new(3u64)?;

assert_eq!(ten.isqrt(), three);

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

Multiplies two non-zero integers together. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2u64)?;
let four = NonZero::new(4u64)?;
let max = NonZero::new(u64::MAX)?;

assert_eq!(Some(four), two.checked_mul(two));
assert_eq!(None, max.checked_mul(two));

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

Multiplies two non-zero integers together. Return NonZero::<u64>::MAX on overflow.

Examples

let two = NonZero::new(2u64)?;
let four = NonZero::new(4u64)?;
let max = NonZero::new(u64::MAX)?;

assert_eq!(four, two.saturating_mul(two));
assert_eq!(max, four.saturating_mul(max));

pub const unsafe fn unchecked_mul(self, other: Self) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Multiplies two non-zero integers together, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self * rhs > u64::MAX.

Examples

#![feature(nonzero_ops)]

let two = NonZero::new(2u64)?;
let four = NonZero::new(4u64)?;

assert_eq!(four, unsafe { two.unchecked_mul(two) });

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

Raises non-zero value to an integer power. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let three = NonZero::new(3u64)?;
let twenty_seven = NonZero::new(27u64)?;
let half_max = NonZero::new(u64::MAX / 2)?;

assert_eq!(Some(twenty_seven), three.checked_pow(3));
assert_eq!(None, half_max.checked_pow(3));

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

Raise non-zero value to an integer power. Return NonZero::<u64>::MAX on overflow.

Examples

let three = NonZero::new(3u64)?;
let twenty_seven = NonZero::new(27u64)?;
let max = NonZero::new(u64::MAX)?;

assert_eq!(twenty_seven, three.saturating_pow(3));
assert_eq!(max, max.saturating_pow(3));

impl NonZero<u64>

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

🔬This is a nightly-only experimental API. (unsigned_nonzero_div_ceil #132968)

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

The result is guaranteed to be non-zero.

Examples

let one = NonZero::new(1u64).unwrap();
let max = NonZero::new(u64::MAX).unwrap();
assert_eq!(one.div_ceil(max), one);

let two = NonZero::new(2u64).unwrap();
let three = NonZero::new(3u64).unwrap();
assert_eq!(three.div_ceil(two), two);

impl NonZero<u128>

pub const BITS: u32 = 128u32

The size of this non-zero integer type in bits.

This value is equal to u128::BITS.

Examples

assert_eq!(NonZero::<u128>::BITS, u128::BITS);

pub const MIN: Self

The smallest value that can be represented by this non-zero integer type, 1.

Examples

assert_eq!(NonZero::<u128>::MIN.get(), 1u128);

pub const MAX: Self

The largest value that can be represented by this non-zero integer type, equal to u128::MAX.

Examples

assert_eq!(NonZero::<u128>::MAX.get(), u128::MAX);

pub const fn leading_zeros(self) -> u32

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

On many architectures, this function can perform better than leading_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<u128>::new(u128::MAX)?;

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.

On many architectures, this function can perform better than trailing_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<u128>::new(0b0101000)?;

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

pub const fn count_ones(self) -> NonZero<u32>

🔬This is a nightly-only experimental API. (non_zero_count_ones #120287)

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

Examples

Basic usage:

#![feature(non_zero_count_ones)]

let a = NonZero::<u128>::new(0b100_0000)?;
let b = NonZero::<u128>::new(0b100_0011)?;

assert_eq!(a.count_ones(), NonZero::new(1)?);
assert_eq!(b.count_ones(), NonZero::new(3)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x13f40000000000000000000000004f76u128)?;
let m = NonZero::new(0x4f7613f4)?;

assert_eq!(n.rotate_left(16), m);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x4f7613f4u128)?;
let m = NonZero::new(0x13f40000000000000000000000004f76)?;

assert_eq!(n.rotate_right(16), m);

pub const fn swap_bytes(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

Reverses the byte order of the integer.

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x12345678901234567890123456789012u128)?;
let m = n.swap_bytes();

assert_eq!(m, NonZero::new(0x12907856341290785634129078563412)?);

pub const fn reverse_bits(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x12345678901234567890123456789012u128)?;
let m = n.reverse_bits();

assert_eq!(m, NonZero::new(0x48091e6a2c48091e6a2c48091e6a2c48)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroU128;
let n = NonZero::new(0x1Au128)?;

if cfg!(target_endian = "big") {
    assert_eq!(NonZeroU128::from_be(n), n)
} else {
    assert_eq!(NonZeroU128::from_be(n), n.swap_bytes())
}

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroU128;
let n = NonZero::new(0x1Au128)?;

if cfg!(target_endian = "little") {
    assert_eq!(NonZeroU128::from_le(n), n)
} else {
    assert_eq!(NonZeroU128::from_le(n), n.swap_bytes())
}

pub const fn to_be(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Au128)?;

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) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Au128)?;

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

pub const fn checked_add(self, other: u128) -> Option<Self>

Adds an unsigned integer to a non-zero value. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let one = NonZero::new(1u128)?;
let two = NonZero::new(2u128)?;
let max = NonZero::new(u128::MAX)?;

assert_eq!(Some(two), one.checked_add(1));
assert_eq!(None, max.checked_add(1));

pub const fn saturating_add(self, other: u128) -> Self

Adds an unsigned integer to a non-zero value. Return NonZero::<u128>::MAX on overflow.

Examples

let one = NonZero::new(1u128)?;
let two = NonZero::new(2u128)?;
let max = NonZero::new(u128::MAX)?;

assert_eq!(two, one.saturating_add(1));
assert_eq!(max, max.saturating_add(1));

pub const unsafe fn unchecked_add(self, other: u128) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Adds an unsigned integer to a non-zero value, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self + rhs > u128::MAX.

Examples

#![feature(nonzero_ops)]

let one = NonZero::new(1u128)?;
let two = NonZero::new(2u128)?;

assert_eq!(two, unsafe { one.unchecked_add(1) });

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

Returns the smallest power of two greater than or equal to self. Checks for overflow and returns None if the next power of two is greater than the type’s maximum value. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2u128)?;
let three = NonZero::new(3u128)?;
let four = NonZero::new(4u128)?;
let max = NonZero::new(u128::MAX)?;

assert_eq!(Some(two), two.checked_next_power_of_two() );
assert_eq!(Some(four), three.checked_next_power_of_two() );
assert_eq!(None, max.checked_next_power_of_two() );

pub const fn ilog2(self) -> u32

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

This is the same operation as u128::ilog2, except that it has no failure cases to worry about since this value can never be zero.

Examples

assert_eq!(NonZero::new(7u128)?.ilog2(), 2);
assert_eq!(NonZero::new(8u128)?.ilog2(), 3);
assert_eq!(NonZero::new(9u128)?.ilog2(), 3);

pub const fn ilog10(self) -> u32

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

This is the same operation as u128::ilog10, except that it has no failure cases to worry about since this value can never be zero.

Examples

assert_eq!(NonZero::new(99u128)?.ilog10(), 1);
assert_eq!(NonZero::new(100u128)?.ilog10(), 2);
assert_eq!(NonZero::new(101u128)?.ilog10(), 2);

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

Calculates the middle point of self and rhs.

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

Examples

let one = NonZero::new(1u128)?;
let two = NonZero::new(2u128)?;
let four = NonZero::new(4u128)?;

assert_eq!(one.midpoint(four), two);
assert_eq!(four.midpoint(one), two);

pub const fn is_power_of_two(self) -> bool

Returns true if and only if self == (1 << k) for some k.

On many architectures, this function can perform better than is_power_of_two() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let eight = NonZero::new(8u128)?;
assert!(eight.is_power_of_two());
let ten = NonZero::new(10u128)?;
assert!(!ten.is_power_of_two());

pub const fn isqrt(self) -> Self

Returns the square root of the number, rounded down.

Examples

Basic usage:

let ten = NonZero::new(10u128)?;
let three = NonZero::new(3u128)?;

assert_eq!(ten.isqrt(), three);

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

Multiplies two non-zero integers together. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2u128)?;
let four = NonZero::new(4u128)?;
let max = NonZero::new(u128::MAX)?;

assert_eq!(Some(four), two.checked_mul(two));
assert_eq!(None, max.checked_mul(two));

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

Multiplies two non-zero integers together. Return NonZero::<u128>::MAX on overflow.

Examples

let two = NonZero::new(2u128)?;
let four = NonZero::new(4u128)?;
let max = NonZero::new(u128::MAX)?;

assert_eq!(four, two.saturating_mul(two));
assert_eq!(max, four.saturating_mul(max));

pub const unsafe fn unchecked_mul(self, other: Self) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Multiplies two non-zero integers together, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self * rhs > u128::MAX.

Examples

#![feature(nonzero_ops)]

let two = NonZero::new(2u128)?;
let four = NonZero::new(4u128)?;

assert_eq!(four, unsafe { two.unchecked_mul(two) });

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

Raises non-zero value to an integer power. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let three = NonZero::new(3u128)?;
let twenty_seven = NonZero::new(27u128)?;
let half_max = NonZero::new(u128::MAX / 2)?;

assert_eq!(Some(twenty_seven), three.checked_pow(3));
assert_eq!(None, half_max.checked_pow(3));

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

Raise non-zero value to an integer power. Return NonZero::<u128>::MAX on overflow.

Examples

let three = NonZero::new(3u128)?;
let twenty_seven = NonZero::new(27u128)?;
let max = NonZero::new(u128::MAX)?;

assert_eq!(twenty_seven, three.saturating_pow(3));
assert_eq!(max, max.saturating_pow(3));

impl NonZero<u128>

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

🔬This is a nightly-only experimental API. (unsigned_nonzero_div_ceil #132968)

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

The result is guaranteed to be non-zero.

Examples

let one = NonZero::new(1u128).unwrap();
let max = NonZero::new(u128::MAX).unwrap();
assert_eq!(one.div_ceil(max), one);

let two = NonZero::new(2u128).unwrap();
let three = NonZero::new(3u128).unwrap();
assert_eq!(three.div_ceil(two), two);

impl NonZero<usize>

pub const BITS: u32 = 64u32

The size of this non-zero integer type in bits.

This value is equal to usize::BITS.

Examples

assert_eq!(NonZero::<usize>::BITS, usize::BITS);

pub const MIN: Self

The smallest value that can be represented by this non-zero integer type, 1.

Examples

assert_eq!(NonZero::<usize>::MIN.get(), 1usize);

pub const MAX: Self

The largest value that can be represented by this non-zero integer type, equal to usize::MAX.

Examples

assert_eq!(NonZero::<usize>::MAX.get(), usize::MAX);

pub const fn leading_zeros(self) -> u32

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

On many architectures, this function can perform better than leading_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<usize>::new(usize::MAX)?;

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.

On many architectures, this function can perform better than trailing_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<usize>::new(0b0101000)?;

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

pub const fn count_ones(self) -> NonZero<u32>

🔬This is a nightly-only experimental API. (non_zero_count_ones #120287)

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

Examples

Basic usage:

#![feature(non_zero_count_ones)]

let a = NonZero::<usize>::new(0b100_0000)?;
let b = NonZero::<usize>::new(0b100_0011)?;

assert_eq!(a.count_ones(), NonZero::new(1)?);
assert_eq!(b.count_ones(), NonZero::new(3)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0xaa00000000006e1usize)?;
let m = NonZero::new(0x6e10aa)?;

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

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x6e10aausize)?;
let m = NonZero::new(0xaa00000000006e1)?;

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

pub const fn swap_bytes(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

Reverses the byte order of the integer.

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1234567890123456usize)?;
let m = n.swap_bytes();

assert_eq!(m, NonZero::new(0x5634129078563412)?);

pub const fn reverse_bits(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1234567890123456usize)?;
let m = n.reverse_bits();

assert_eq!(m, NonZero::new(0x6a2c48091e6a2c48)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroUsize;
let n = NonZero::new(0x1Ausize)?;

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

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroUsize;
let n = NonZero::new(0x1Ausize)?;

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

pub const fn to_be(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Ausize)?;

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

pub const fn to_le(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Ausize)?;

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

pub const fn checked_add(self, other: usize) -> Option<Self>

Adds an unsigned integer to a non-zero value. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let one = NonZero::new(1usize)?;
let two = NonZero::new(2usize)?;
let max = NonZero::new(usize::MAX)?;

assert_eq!(Some(two), one.checked_add(1));
assert_eq!(None, max.checked_add(1));

pub const fn saturating_add(self, other: usize) -> Self

Adds an unsigned integer to a non-zero value. Return NonZero::<usize>::MAX on overflow.

Examples

let one = NonZero::new(1usize)?;
let two = NonZero::new(2usize)?;
let max = NonZero::new(usize::MAX)?;

assert_eq!(two, one.saturating_add(1));
assert_eq!(max, max.saturating_add(1));

pub const unsafe fn unchecked_add(self, other: usize) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Adds an unsigned integer to a non-zero value, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self + rhs > usize::MAX.

Examples

#![feature(nonzero_ops)]

let one = NonZero::new(1usize)?;
let two = NonZero::new(2usize)?;

assert_eq!(two, unsafe { one.unchecked_add(1) });

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

Returns the smallest power of two greater than or equal to self. Checks for overflow and returns None if the next power of two is greater than the type’s maximum value. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2usize)?;
let three = NonZero::new(3usize)?;
let four = NonZero::new(4usize)?;
let max = NonZero::new(usize::MAX)?;

assert_eq!(Some(two), two.checked_next_power_of_two() );
assert_eq!(Some(four), three.checked_next_power_of_two() );
assert_eq!(None, max.checked_next_power_of_two() );

pub const fn ilog2(self) -> u32

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

This is the same operation as usize::ilog2, except that it has no failure cases to worry about since this value can never be zero.

Examples

assert_eq!(NonZero::new(7usize)?.ilog2(), 2);
assert_eq!(NonZero::new(8usize)?.ilog2(), 3);
assert_eq!(NonZero::new(9usize)?.ilog2(), 3);

pub const fn ilog10(self) -> u32

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

This is the same operation as usize::ilog10, except that it has no failure cases to worry about since this value can never be zero.

Examples

assert_eq!(NonZero::new(99usize)?.ilog10(), 1);
assert_eq!(NonZero::new(100usize)?.ilog10(), 2);
assert_eq!(NonZero::new(101usize)?.ilog10(), 2);

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

Calculates the middle point of self and rhs.

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

Examples

let one = NonZero::new(1usize)?;
let two = NonZero::new(2usize)?;
let four = NonZero::new(4usize)?;

assert_eq!(one.midpoint(four), two);
assert_eq!(four.midpoint(one), two);

pub const fn is_power_of_two(self) -> bool

Returns true if and only if self == (1 << k) for some k.

On many architectures, this function can perform better than is_power_of_two() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let eight = NonZero::new(8usize)?;
assert!(eight.is_power_of_two());
let ten = NonZero::new(10usize)?;
assert!(!ten.is_power_of_two());

pub const fn isqrt(self) -> Self

Returns the square root of the number, rounded down.

Examples

Basic usage:

let ten = NonZero::new(10usize)?;
let three = NonZero::new(3usize)?;

assert_eq!(ten.isqrt(), three);

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

Multiplies two non-zero integers together. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2usize)?;
let four = NonZero::new(4usize)?;
let max = NonZero::new(usize::MAX)?;

assert_eq!(Some(four), two.checked_mul(two));
assert_eq!(None, max.checked_mul(two));

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

Multiplies two non-zero integers together. Return NonZero::<usize>::MAX on overflow.

Examples

let two = NonZero::new(2usize)?;
let four = NonZero::new(4usize)?;
let max = NonZero::new(usize::MAX)?;

assert_eq!(four, two.saturating_mul(two));
assert_eq!(max, four.saturating_mul(max));

pub const unsafe fn unchecked_mul(self, other: Self) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Multiplies two non-zero integers together, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self * rhs > usize::MAX.

Examples

#![feature(nonzero_ops)]

let two = NonZero::new(2usize)?;
let four = NonZero::new(4usize)?;

assert_eq!(four, unsafe { two.unchecked_mul(two) });

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

Raises non-zero value to an integer power. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let three = NonZero::new(3usize)?;
let twenty_seven = NonZero::new(27usize)?;
let half_max = NonZero::new(usize::MAX / 2)?;

assert_eq!(Some(twenty_seven), three.checked_pow(3));
assert_eq!(None, half_max.checked_pow(3));

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

Raise non-zero value to an integer power. Return NonZero::<usize>::MAX on overflow.

Examples

let three = NonZero::new(3usize)?;
let twenty_seven = NonZero::new(27usize)?;
let max = NonZero::new(usize::MAX)?;

assert_eq!(twenty_seven, three.saturating_pow(3));
assert_eq!(max, max.saturating_pow(3));

impl NonZero<usize>

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

🔬This is a nightly-only experimental API. (unsigned_nonzero_div_ceil #132968)

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

The result is guaranteed to be non-zero.

Examples

let one = NonZero::new(1usize).unwrap();
let max = NonZero::new(usize::MAX).unwrap();
assert_eq!(one.div_ceil(max), one);

let two = NonZero::new(2usize).unwrap();
let three = NonZero::new(3usize).unwrap();
assert_eq!(three.div_ceil(two), two);

impl NonZero<i8>

pub const BITS: u32 = 8u32

The size of this non-zero integer type in bits.

This value is equal to i8::BITS.

Examples

assert_eq!(NonZero::<i8>::BITS, i8::BITS);

pub const MIN: Self

The smallest value that can be represented by this non-zero integer type, equal to i8::MIN.

Note: While most integer types are defined for every whole number between MIN and MAX, signed non-zero integers are a special case. They have a “gap” at 0.

Examples

assert_eq!(NonZero::<i8>::MIN.get(), i8::MIN);

pub const MAX: Self

The largest value that can be represented by this non-zero integer type, equal to i8::MAX.

Note: While most integer types are defined for every whole number between MIN and MAX, signed non-zero integers are a special case. They have a “gap” at 0.

Examples

assert_eq!(NonZero::<i8>::MAX.get(), i8::MAX);

pub const fn leading_zeros(self) -> u32

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

On many architectures, this function can perform better than leading_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<i8>::new(-1i8)?;

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.

On many architectures, this function can perform better than trailing_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<i8>::new(0b0101000)?;

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

pub const fn count_ones(self) -> NonZero<u32>

🔬This is a nightly-only experimental API. (non_zero_count_ones #120287)

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

Examples

Basic usage:

#![feature(non_zero_count_ones)]

let a = NonZero::<i8>::new(0b100_0000)?;
let b = NonZero::<i8>::new(0b100_0011)?;

assert_eq!(a.count_ones(), NonZero::new(1)?);
assert_eq!(b.count_ones(), NonZero::new(3)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(-0x7ei8)?;
let m = NonZero::new(0xa)?;

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

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0xai8)?;
let m = NonZero::new(-0x7e)?;

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

pub const fn swap_bytes(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

Reverses the byte order of the integer.

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x12i8)?;
let m = n.swap_bytes();

assert_eq!(m, NonZero::new(0x12)?);

pub const fn reverse_bits(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x12i8)?;
let m = n.reverse_bits();

assert_eq!(m, NonZero::new(0x48)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroI8;
let n = NonZero::new(0x1Ai8)?;

if cfg!(target_endian = "big") {
    assert_eq!(NonZeroI8::from_be(n), n)
} else {
    assert_eq!(NonZeroI8::from_be(n), n.swap_bytes())
}

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroI8;
let n = NonZero::new(0x1Ai8)?;

if cfg!(target_endian = "little") {
    assert_eq!(NonZeroI8::from_le(n), n)
} else {
    assert_eq!(NonZeroI8::from_le(n), n.swap_bytes())
}

pub const fn to_be(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Ai8)?;

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) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Ai8)?;

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

pub const fn abs(self) -> Self

Computes the absolute value of self. See i8::abs for documentation on overflow behavior.

Example

let pos = NonZero::new(1i8)?;
let neg = NonZero::new(-1i8)?;

assert_eq!(pos, pos.abs());
assert_eq!(pos, neg.abs());

pub const fn checked_abs(self) -> Option<Self>

Checked absolute value. Checks for overflow and returns None if self == NonZero::<i8>::MIN. The result cannot be zero.

Example

let pos = NonZero::new(1i8)?;
let neg = NonZero::new(-1i8)?;
let min = NonZero::new(i8::MIN)?;

assert_eq!(Some(pos), neg.checked_abs());
assert_eq!(None, min.checked_abs());

pub const fn overflowing_abs(self) -> (Self, bool)

Computes the absolute value of self, with overflow information, see i8::overflowing_abs.

Example

let pos = NonZero::new(1i8)?;
let neg = NonZero::new(-1i8)?;
let min = NonZero::new(i8::MIN)?;

assert_eq!((pos, false), pos.overflowing_abs());
assert_eq!((pos, false), neg.overflowing_abs());
assert_eq!((min, true), min.overflowing_abs());

pub const fn saturating_abs(self) -> Self

Saturating absolute value, see i8::saturating_abs.

Example

let pos = NonZero::new(1i8)?;
let neg = NonZero::new(-1i8)?;
let min = NonZero::new(i8::MIN)?;
let min_plus = NonZero::new(i8::MIN + 1)?;
let max = NonZero::new(i8::MAX)?;

assert_eq!(pos, pos.saturating_abs());
assert_eq!(pos, neg.saturating_abs());
assert_eq!(max, min.saturating_abs());
assert_eq!(max, min_plus.saturating_abs());

pub const fn wrapping_abs(self) -> Self

Wrapping absolute value, see i8::wrapping_abs.

Example

let pos = NonZero::new(1i8)?;
let neg = NonZero::new(-1i8)?;
let min = NonZero::new(i8::MIN)?;

assert_eq!(pos, pos.wrapping_abs());
assert_eq!(pos, neg.wrapping_abs());
assert_eq!(min, min.wrapping_abs());
assert_eq!(max, (-max).wrapping_abs());

pub const fn unsigned_abs(self) -> NonZero<u8>

Computes the absolute value of self without any wrapping or panicking.

Example

let u_pos = NonZero::new(1u8)?;
let i_pos = NonZero::new(1i8)?;
let i_neg = NonZero::new(-1i8)?;
let i_min = NonZero::new(i8::MIN)?;
let u_max = NonZero::new(u8::MAX / 2 + 1)?;

assert_eq!(u_pos, i_pos.unsigned_abs());
assert_eq!(u_pos, i_neg.unsigned_abs());
assert_eq!(u_max, i_min.unsigned_abs());

pub const fn is_positive(self) -> bool

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

Example

let pos_five = NonZero::new(5i8)?;
let neg_five = NonZero::new(-5i8)?;

assert!(pos_five.is_positive());
assert!(!neg_five.is_positive());

pub const fn is_negative(self) -> bool

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

Example

let pos_five = NonZero::new(5i8)?;
let neg_five = NonZero::new(-5i8)?;

assert!(neg_five.is_negative());
assert!(!pos_five.is_negative());

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

Checked negation. Computes -self, returning None if self == NonZero::<i8>::MIN.

Example

let pos_five = NonZero::new(5i8)?;
let neg_five = NonZero::new(-5i8)?;
let min = NonZero::new(i8::MIN)?;

assert_eq!(pos_five.checked_neg(), Some(neg_five));
assert_eq!(min.checked_neg(), None);

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

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

See i8::overflowing_neg for documentation on overflow behavior.

Example

let pos_five = NonZero::new(5i8)?;
let neg_five = NonZero::new(-5i8)?;
let min = NonZero::new(i8::MIN)?;

assert_eq!(pos_five.overflowing_neg(), (neg_five, false));
assert_eq!(min.overflowing_neg(), (min, true));

pub const fn saturating_neg(self) -> Self

Saturating negation. Computes -self, returning NonZero::<i8>::MAX if self == NonZero::<i8>::MIN instead of overflowing.

Example

let pos_five = NonZero::new(5i8)?;
let neg_five = NonZero::new(-5i8)?;
let min = NonZero::new(i8::MIN)?;
let min_plus_one = NonZero::new(i8::MIN + 1)?;
let max = NonZero::new(i8::MAX)?;

assert_eq!(pos_five.saturating_neg(), neg_five);
assert_eq!(min.saturating_neg(), max);
assert_eq!(max.saturating_neg(), min_plus_one);

pub const fn wrapping_neg(self) -> Self

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

See i8::wrapping_neg for documentation on overflow behavior.

Example

let pos_five = NonZero::new(5i8)?;
let neg_five = NonZero::new(-5i8)?;
let min = NonZero::new(i8::MIN)?;

assert_eq!(pos_five.wrapping_neg(), neg_five);
assert_eq!(min.wrapping_neg(), min);

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

Multiplies two non-zero integers together. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2i8)?;
let four = NonZero::new(4i8)?;
let max = NonZero::new(i8::MAX)?;

assert_eq!(Some(four), two.checked_mul(two));
assert_eq!(None, max.checked_mul(two));

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

Multiplies two non-zero integers together. Return NonZero::<i8>::MAX on overflow.

Examples

let two = NonZero::new(2i8)?;
let four = NonZero::new(4i8)?;
let max = NonZero::new(i8::MAX)?;

assert_eq!(four, two.saturating_mul(two));
assert_eq!(max, four.saturating_mul(max));

pub const unsafe fn unchecked_mul(self, other: Self) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Multiplies two non-zero integers together, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self * rhs > i8::MAX, or self * rhs < i8::MIN.

Examples

#![feature(nonzero_ops)]

let two = NonZero::new(2i8)?;
let four = NonZero::new(4i8)?;

assert_eq!(four, unsafe { two.unchecked_mul(two) });

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

Raises non-zero value to an integer power. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let three = NonZero::new(3i8)?;
let twenty_seven = NonZero::new(27i8)?;
let half_max = NonZero::new(i8::MAX / 2)?;

assert_eq!(Some(twenty_seven), three.checked_pow(3));
assert_eq!(None, half_max.checked_pow(3));

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

Raise non-zero value to an integer power. Return NonZero::<i8>::MIN or NonZero::<i8>::MAX on overflow.

Examples

let three = NonZero::new(3i8)?;
let twenty_seven = NonZero::new(27i8)?;
let max = NonZero::new(i8::MAX)?;

assert_eq!(twenty_seven, three.saturating_pow(3));
assert_eq!(max, max.saturating_pow(3));

impl NonZero<i16>

pub const BITS: u32 = 16u32

The size of this non-zero integer type in bits.

This value is equal to i16::BITS.

Examples

assert_eq!(NonZero::<i16>::BITS, i16::BITS);

pub const MIN: Self

The smallest value that can be represented by this non-zero integer type, equal to i16::MIN.

Note: While most integer types are defined for every whole number between MIN and MAX, signed non-zero integers are a special case. They have a “gap” at 0.

Examples

assert_eq!(NonZero::<i16>::MIN.get(), i16::MIN);

pub const MAX: Self

The largest value that can be represented by this non-zero integer type, equal to i16::MAX.

Note: While most integer types are defined for every whole number between MIN and MAX, signed non-zero integers are a special case. They have a “gap” at 0.

Examples

assert_eq!(NonZero::<i16>::MAX.get(), i16::MAX);

pub const fn leading_zeros(self) -> u32

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

On many architectures, this function can perform better than leading_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<i16>::new(-1i16)?;

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.

On many architectures, this function can perform better than trailing_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<i16>::new(0b0101000)?;

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

pub const fn count_ones(self) -> NonZero<u32>

🔬This is a nightly-only experimental API. (non_zero_count_ones #120287)

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

Examples

Basic usage:

#![feature(non_zero_count_ones)]

let a = NonZero::<i16>::new(0b100_0000)?;
let b = NonZero::<i16>::new(0b100_0011)?;

assert_eq!(a.count_ones(), NonZero::new(1)?);
assert_eq!(b.count_ones(), NonZero::new(3)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(-0x5ffdi16)?;
let m = NonZero::new(0x3a)?;

assert_eq!(n.rotate_left(4), m);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x3ai16)?;
let m = NonZero::new(-0x5ffd)?;

assert_eq!(n.rotate_right(4), m);

pub const fn swap_bytes(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

Reverses the byte order of the integer.

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1234i16)?;
let m = n.swap_bytes();

assert_eq!(m, NonZero::new(0x3412)?);

pub const fn reverse_bits(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1234i16)?;
let m = n.reverse_bits();

assert_eq!(m, NonZero::new(0x2c48)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroI16;
let n = NonZero::new(0x1Ai16)?;

if cfg!(target_endian = "big") {
    assert_eq!(NonZeroI16::from_be(n), n)
} else {
    assert_eq!(NonZeroI16::from_be(n), n.swap_bytes())
}

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroI16;
let n = NonZero::new(0x1Ai16)?;

if cfg!(target_endian = "little") {
    assert_eq!(NonZeroI16::from_le(n), n)
} else {
    assert_eq!(NonZeroI16::from_le(n), n.swap_bytes())
}

pub const fn to_be(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Ai16)?;

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) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Ai16)?;

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

pub const fn abs(self) -> Self

Computes the absolute value of self. See i16::abs for documentation on overflow behavior.

Example

let pos = NonZero::new(1i16)?;
let neg = NonZero::new(-1i16)?;

assert_eq!(pos, pos.abs());
assert_eq!(pos, neg.abs());

pub const fn checked_abs(self) -> Option<Self>

Checked absolute value. Checks for overflow and returns None if self == NonZero::<i16>::MIN. The result cannot be zero.

Example

let pos = NonZero::new(1i16)?;
let neg = NonZero::new(-1i16)?;
let min = NonZero::new(i16::MIN)?;

assert_eq!(Some(pos), neg.checked_abs());
assert_eq!(None, min.checked_abs());

pub const fn overflowing_abs(self) -> (Self, bool)

Computes the absolute value of self, with overflow information, see i16::overflowing_abs.

Example

let pos = NonZero::new(1i16)?;
let neg = NonZero::new(-1i16)?;
let min = NonZero::new(i16::MIN)?;

assert_eq!((pos, false), pos.overflowing_abs());
assert_eq!((pos, false), neg.overflowing_abs());
assert_eq!((min, true), min.overflowing_abs());

pub const fn saturating_abs(self) -> Self

Saturating absolute value, see i16::saturating_abs.

Example

let pos = NonZero::new(1i16)?;
let neg = NonZero::new(-1i16)?;
let min = NonZero::new(i16::MIN)?;
let min_plus = NonZero::new(i16::MIN + 1)?;
let max = NonZero::new(i16::MAX)?;

assert_eq!(pos, pos.saturating_abs());
assert_eq!(pos, neg.saturating_abs());
assert_eq!(max, min.saturating_abs());
assert_eq!(max, min_plus.saturating_abs());

pub const fn wrapping_abs(self) -> Self

Wrapping absolute value, see i16::wrapping_abs.

Example

let pos = NonZero::new(1i16)?;
let neg = NonZero::new(-1i16)?;
let min = NonZero::new(i16::MIN)?;

assert_eq!(pos, pos.wrapping_abs());
assert_eq!(pos, neg.wrapping_abs());
assert_eq!(min, min.wrapping_abs());
assert_eq!(max, (-max).wrapping_abs());

pub const fn unsigned_abs(self) -> NonZero<u16>

Computes the absolute value of self without any wrapping or panicking.

Example

let u_pos = NonZero::new(1u16)?;
let i_pos = NonZero::new(1i16)?;
let i_neg = NonZero::new(-1i16)?;
let i_min = NonZero::new(i16::MIN)?;
let u_max = NonZero::new(u16::MAX / 2 + 1)?;

assert_eq!(u_pos, i_pos.unsigned_abs());
assert_eq!(u_pos, i_neg.unsigned_abs());
assert_eq!(u_max, i_min.unsigned_abs());

pub const fn is_positive(self) -> bool

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

Example

let pos_five = NonZero::new(5i16)?;
let neg_five = NonZero::new(-5i16)?;

assert!(pos_five.is_positive());
assert!(!neg_five.is_positive());

pub const fn is_negative(self) -> bool

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

Example

let pos_five = NonZero::new(5i16)?;
let neg_five = NonZero::new(-5i16)?;

assert!(neg_five.is_negative());
assert!(!pos_five.is_negative());

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

Checked negation. Computes -self, returning None if self == NonZero::<i16>::MIN.

Example

let pos_five = NonZero::new(5i16)?;
let neg_five = NonZero::new(-5i16)?;
let min = NonZero::new(i16::MIN)?;

assert_eq!(pos_five.checked_neg(), Some(neg_five));
assert_eq!(min.checked_neg(), None);

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

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

See i16::overflowing_neg for documentation on overflow behavior.

Example

let pos_five = NonZero::new(5i16)?;
let neg_five = NonZero::new(-5i16)?;
let min = NonZero::new(i16::MIN)?;

assert_eq!(pos_five.overflowing_neg(), (neg_five, false));
assert_eq!(min.overflowing_neg(), (min, true));

pub const fn saturating_neg(self) -> Self

Saturating negation. Computes -self, returning NonZero::<i16>::MAX if self == NonZero::<i16>::MIN instead of overflowing.

Example

let pos_five = NonZero::new(5i16)?;
let neg_five = NonZero::new(-5i16)?;
let min = NonZero::new(i16::MIN)?;
let min_plus_one = NonZero::new(i16::MIN + 1)?;
let max = NonZero::new(i16::MAX)?;

assert_eq!(pos_five.saturating_neg(), neg_five);
assert_eq!(min.saturating_neg(), max);
assert_eq!(max.saturating_neg(), min_plus_one);

pub const fn wrapping_neg(self) -> Self

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

See i16::wrapping_neg for documentation on overflow behavior.

Example

let pos_five = NonZero::new(5i16)?;
let neg_five = NonZero::new(-5i16)?;
let min = NonZero::new(i16::MIN)?;

assert_eq!(pos_five.wrapping_neg(), neg_five);
assert_eq!(min.wrapping_neg(), min);

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

Multiplies two non-zero integers together. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2i16)?;
let four = NonZero::new(4i16)?;
let max = NonZero::new(i16::MAX)?;

assert_eq!(Some(four), two.checked_mul(two));
assert_eq!(None, max.checked_mul(two));

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

Multiplies two non-zero integers together. Return NonZero::<i16>::MAX on overflow.

Examples

let two = NonZero::new(2i16)?;
let four = NonZero::new(4i16)?;
let max = NonZero::new(i16::MAX)?;

assert_eq!(four, two.saturating_mul(two));
assert_eq!(max, four.saturating_mul(max));

pub const unsafe fn unchecked_mul(self, other: Self) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Multiplies two non-zero integers together, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self * rhs > i16::MAX, or self * rhs < i16::MIN.

Examples

#![feature(nonzero_ops)]

let two = NonZero::new(2i16)?;
let four = NonZero::new(4i16)?;

assert_eq!(four, unsafe { two.unchecked_mul(two) });

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

Raises non-zero value to an integer power. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let three = NonZero::new(3i16)?;
let twenty_seven = NonZero::new(27i16)?;
let half_max = NonZero::new(i16::MAX / 2)?;

assert_eq!(Some(twenty_seven), three.checked_pow(3));
assert_eq!(None, half_max.checked_pow(3));

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

Raise non-zero value to an integer power. Return NonZero::<i16>::MIN or NonZero::<i16>::MAX on overflow.

Examples

let three = NonZero::new(3i16)?;
let twenty_seven = NonZero::new(27i16)?;
let max = NonZero::new(i16::MAX)?;

assert_eq!(twenty_seven, three.saturating_pow(3));
assert_eq!(max, max.saturating_pow(3));

impl NonZero<i32>

pub const BITS: u32 = 32u32

The size of this non-zero integer type in bits.

This value is equal to i32::BITS.

Examples

assert_eq!(NonZero::<i32>::BITS, i32::BITS);

pub const MIN: Self

The smallest value that can be represented by this non-zero integer type, equal to i32::MIN.

Note: While most integer types are defined for every whole number between MIN and MAX, signed non-zero integers are a special case. They have a “gap” at 0.

Examples

assert_eq!(NonZero::<i32>::MIN.get(), i32::MIN);

pub const MAX: Self

The largest value that can be represented by this non-zero integer type, equal to i32::MAX.

Note: While most integer types are defined for every whole number between MIN and MAX, signed non-zero integers are a special case. They have a “gap” at 0.

Examples

assert_eq!(NonZero::<i32>::MAX.get(), i32::MAX);

pub const fn leading_zeros(self) -> u32

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

On many architectures, this function can perform better than leading_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<i32>::new(-1i32)?;

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.

On many architectures, this function can perform better than trailing_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<i32>::new(0b0101000)?;

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

pub const fn count_ones(self) -> NonZero<u32>

🔬This is a nightly-only experimental API. (non_zero_count_ones #120287)

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

Examples

Basic usage:

#![feature(non_zero_count_ones)]

let a = NonZero::<i32>::new(0b100_0000)?;
let b = NonZero::<i32>::new(0b100_0011)?;

assert_eq!(a.count_ones(), NonZero::new(1)?);
assert_eq!(b.count_ones(), NonZero::new(3)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x10000b3i32)?;
let m = NonZero::new(0xb301)?;

assert_eq!(n.rotate_left(8), m);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0xb301i32)?;
let m = NonZero::new(0x10000b3)?;

assert_eq!(n.rotate_right(8), m);

pub const fn swap_bytes(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

Reverses the byte order of the integer.

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x12345678i32)?;
let m = n.swap_bytes();

assert_eq!(m, NonZero::new(0x78563412)?);

pub const fn reverse_bits(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x12345678i32)?;
let m = n.reverse_bits();

assert_eq!(m, NonZero::new(0x1e6a2c48)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroI32;
let n = NonZero::new(0x1Ai32)?;

if cfg!(target_endian = "big") {
    assert_eq!(NonZeroI32::from_be(n), n)
} else {
    assert_eq!(NonZeroI32::from_be(n), n.swap_bytes())
}

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroI32;
let n = NonZero::new(0x1Ai32)?;

if cfg!(target_endian = "little") {
    assert_eq!(NonZeroI32::from_le(n), n)
} else {
    assert_eq!(NonZeroI32::from_le(n), n.swap_bytes())
}

pub const fn to_be(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Ai32)?;

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) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Ai32)?;

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

pub const fn abs(self) -> Self

Computes the absolute value of self. See i32::abs for documentation on overflow behavior.

Example

let pos = NonZero::new(1i32)?;
let neg = NonZero::new(-1i32)?;

assert_eq!(pos, pos.abs());
assert_eq!(pos, neg.abs());

pub const fn checked_abs(self) -> Option<Self>

Checked absolute value. Checks for overflow and returns None if self == NonZero::<i32>::MIN. The result cannot be zero.

Example

let pos = NonZero::new(1i32)?;
let neg = NonZero::new(-1i32)?;
let min = NonZero::new(i32::MIN)?;

assert_eq!(Some(pos), neg.checked_abs());
assert_eq!(None, min.checked_abs());

pub const fn overflowing_abs(self) -> (Self, bool)

Computes the absolute value of self, with overflow information, see i32::overflowing_abs.

Example

let pos = NonZero::new(1i32)?;
let neg = NonZero::new(-1i32)?;
let min = NonZero::new(i32::MIN)?;

assert_eq!((pos, false), pos.overflowing_abs());
assert_eq!((pos, false), neg.overflowing_abs());
assert_eq!((min, true), min.overflowing_abs());

pub const fn saturating_abs(self) -> Self

Saturating absolute value, see i32::saturating_abs.

Example

let pos = NonZero::new(1i32)?;
let neg = NonZero::new(-1i32)?;
let min = NonZero::new(i32::MIN)?;
let min_plus = NonZero::new(i32::MIN + 1)?;
let max = NonZero::new(i32::MAX)?;

assert_eq!(pos, pos.saturating_abs());
assert_eq!(pos, neg.saturating_abs());
assert_eq!(max, min.saturating_abs());
assert_eq!(max, min_plus.saturating_abs());

pub const fn wrapping_abs(self) -> Self

Wrapping absolute value, see i32::wrapping_abs.

Example

let pos = NonZero::new(1i32)?;
let neg = NonZero::new(-1i32)?;
let min = NonZero::new(i32::MIN)?;

assert_eq!(pos, pos.wrapping_abs());
assert_eq!(pos, neg.wrapping_abs());
assert_eq!(min, min.wrapping_abs());
assert_eq!(max, (-max).wrapping_abs());

pub const fn unsigned_abs(self) -> NonZero<u32>

Computes the absolute value of self without any wrapping or panicking.

Example

let u_pos = NonZero::new(1u32)?;
let i_pos = NonZero::new(1i32)?;
let i_neg = NonZero::new(-1i32)?;
let i_min = NonZero::new(i32::MIN)?;
let u_max = NonZero::new(u32::MAX / 2 + 1)?;

assert_eq!(u_pos, i_pos.unsigned_abs());
assert_eq!(u_pos, i_neg.unsigned_abs());
assert_eq!(u_max, i_min.unsigned_abs());

pub const fn is_positive(self) -> bool

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

Example

let pos_five = NonZero::new(5i32)?;
let neg_five = NonZero::new(-5i32)?;

assert!(pos_five.is_positive());
assert!(!neg_five.is_positive());

pub const fn is_negative(self) -> bool

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

Example

let pos_five = NonZero::new(5i32)?;
let neg_five = NonZero::new(-5i32)?;

assert!(neg_five.is_negative());
assert!(!pos_five.is_negative());

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

Checked negation. Computes -self, returning None if self == NonZero::<i32>::MIN.

Example

let pos_five = NonZero::new(5i32)?;
let neg_five = NonZero::new(-5i32)?;
let min = NonZero::new(i32::MIN)?;

assert_eq!(pos_five.checked_neg(), Some(neg_five));
assert_eq!(min.checked_neg(), None);

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

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

See i32::overflowing_neg for documentation on overflow behavior.

Example

let pos_five = NonZero::new(5i32)?;
let neg_five = NonZero::new(-5i32)?;
let min = NonZero::new(i32::MIN)?;

assert_eq!(pos_five.overflowing_neg(), (neg_five, false));
assert_eq!(min.overflowing_neg(), (min, true));

pub const fn saturating_neg(self) -> Self

Saturating negation. Computes -self, returning NonZero::<i32>::MAX if self == NonZero::<i32>::MIN instead of overflowing.

Example

let pos_five = NonZero::new(5i32)?;
let neg_five = NonZero::new(-5i32)?;
let min = NonZero::new(i32::MIN)?;
let min_plus_one = NonZero::new(i32::MIN + 1)?;
let max = NonZero::new(i32::MAX)?;

assert_eq!(pos_five.saturating_neg(), neg_five);
assert_eq!(min.saturating_neg(), max);
assert_eq!(max.saturating_neg(), min_plus_one);

pub const fn wrapping_neg(self) -> Self

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

See i32::wrapping_neg for documentation on overflow behavior.

Example

let pos_five = NonZero::new(5i32)?;
let neg_five = NonZero::new(-5i32)?;
let min = NonZero::new(i32::MIN)?;

assert_eq!(pos_five.wrapping_neg(), neg_five);
assert_eq!(min.wrapping_neg(), min);

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

Multiplies two non-zero integers together. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2i32)?;
let four = NonZero::new(4i32)?;
let max = NonZero::new(i32::MAX)?;

assert_eq!(Some(four), two.checked_mul(two));
assert_eq!(None, max.checked_mul(two));

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

Multiplies two non-zero integers together. Return NonZero::<i32>::MAX on overflow.

Examples

let two = NonZero::new(2i32)?;
let four = NonZero::new(4i32)?;
let max = NonZero::new(i32::MAX)?;

assert_eq!(four, two.saturating_mul(two));
assert_eq!(max, four.saturating_mul(max));

pub const unsafe fn unchecked_mul(self, other: Self) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Multiplies two non-zero integers together, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self * rhs > i32::MAX, or self * rhs < i32::MIN.

Examples

#![feature(nonzero_ops)]

let two = NonZero::new(2i32)?;
let four = NonZero::new(4i32)?;

assert_eq!(four, unsafe { two.unchecked_mul(two) });

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

Raises non-zero value to an integer power. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let three = NonZero::new(3i32)?;
let twenty_seven = NonZero::new(27i32)?;
let half_max = NonZero::new(i32::MAX / 2)?;

assert_eq!(Some(twenty_seven), three.checked_pow(3));
assert_eq!(None, half_max.checked_pow(3));

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

Raise non-zero value to an integer power. Return NonZero::<i32>::MIN or NonZero::<i32>::MAX on overflow.

Examples

let three = NonZero::new(3i32)?;
let twenty_seven = NonZero::new(27i32)?;
let max = NonZero::new(i32::MAX)?;

assert_eq!(twenty_seven, three.saturating_pow(3));
assert_eq!(max, max.saturating_pow(3));

impl NonZero<i64>

pub const BITS: u32 = 64u32

The size of this non-zero integer type in bits.

This value is equal to i64::BITS.

Examples

assert_eq!(NonZero::<i64>::BITS, i64::BITS);

pub const MIN: Self

The smallest value that can be represented by this non-zero integer type, equal to i64::MIN.

Note: While most integer types are defined for every whole number between MIN and MAX, signed non-zero integers are a special case. They have a “gap” at 0.

Examples

assert_eq!(NonZero::<i64>::MIN.get(), i64::MIN);

pub const MAX: Self

The largest value that can be represented by this non-zero integer type, equal to i64::MAX.

Note: While most integer types are defined for every whole number between MIN and MAX, signed non-zero integers are a special case. They have a “gap” at 0.

Examples

assert_eq!(NonZero::<i64>::MAX.get(), i64::MAX);

pub const fn leading_zeros(self) -> u32

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

On many architectures, this function can perform better than leading_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<i64>::new(-1i64)?;

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.

On many architectures, this function can perform better than trailing_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<i64>::new(0b0101000)?;

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

pub const fn count_ones(self) -> NonZero<u32>

🔬This is a nightly-only experimental API. (non_zero_count_ones #120287)

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

Examples

Basic usage:

#![feature(non_zero_count_ones)]

let a = NonZero::<i64>::new(0b100_0000)?;
let b = NonZero::<i64>::new(0b100_0011)?;

assert_eq!(a.count_ones(), NonZero::new(1)?);
assert_eq!(b.count_ones(), NonZero::new(3)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0xaa00000000006e1i64)?;
let m = NonZero::new(0x6e10aa)?;

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

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x6e10aai64)?;
let m = NonZero::new(0xaa00000000006e1)?;

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

pub const fn swap_bytes(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

Reverses the byte order of the integer.

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1234567890123456i64)?;
let m = n.swap_bytes();

assert_eq!(m, NonZero::new(0x5634129078563412)?);

pub const fn reverse_bits(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1234567890123456i64)?;
let m = n.reverse_bits();

assert_eq!(m, NonZero::new(0x6a2c48091e6a2c48)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroI64;
let n = NonZero::new(0x1Ai64)?;

if cfg!(target_endian = "big") {
    assert_eq!(NonZeroI64::from_be(n), n)
} else {
    assert_eq!(NonZeroI64::from_be(n), n.swap_bytes())
}

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroI64;
let n = NonZero::new(0x1Ai64)?;

if cfg!(target_endian = "little") {
    assert_eq!(NonZeroI64::from_le(n), n)
} else {
    assert_eq!(NonZeroI64::from_le(n), n.swap_bytes())
}

pub const fn to_be(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Ai64)?;

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) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Ai64)?;

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

pub const fn abs(self) -> Self

Computes the absolute value of self. See i64::abs for documentation on overflow behavior.

Example

let pos = NonZero::new(1i64)?;
let neg = NonZero::new(-1i64)?;

assert_eq!(pos, pos.abs());
assert_eq!(pos, neg.abs());

pub const fn checked_abs(self) -> Option<Self>

Checked absolute value. Checks for overflow and returns None if self == NonZero::<i64>::MIN. The result cannot be zero.

Example

let pos = NonZero::new(1i64)?;
let neg = NonZero::new(-1i64)?;
let min = NonZero::new(i64::MIN)?;

assert_eq!(Some(pos), neg.checked_abs());
assert_eq!(None, min.checked_abs());

pub const fn overflowing_abs(self) -> (Self, bool)

Computes the absolute value of self, with overflow information, see i64::overflowing_abs.

Example

let pos = NonZero::new(1i64)?;
let neg = NonZero::new(-1i64)?;
let min = NonZero::new(i64::MIN)?;

assert_eq!((pos, false), pos.overflowing_abs());
assert_eq!((pos, false), neg.overflowing_abs());
assert_eq!((min, true), min.overflowing_abs());

pub const fn saturating_abs(self) -> Self

Saturating absolute value, see i64::saturating_abs.

Example

let pos = NonZero::new(1i64)?;
let neg = NonZero::new(-1i64)?;
let min = NonZero::new(i64::MIN)?;
let min_plus = NonZero::new(i64::MIN + 1)?;
let max = NonZero::new(i64::MAX)?;

assert_eq!(pos, pos.saturating_abs());
assert_eq!(pos, neg.saturating_abs());
assert_eq!(max, min.saturating_abs());
assert_eq!(max, min_plus.saturating_abs());

pub const fn wrapping_abs(self) -> Self

Wrapping absolute value, see i64::wrapping_abs.

Example

let pos = NonZero::new(1i64)?;
let neg = NonZero::new(-1i64)?;
let min = NonZero::new(i64::MIN)?;

assert_eq!(pos, pos.wrapping_abs());
assert_eq!(pos, neg.wrapping_abs());
assert_eq!(min, min.wrapping_abs());
assert_eq!(max, (-max).wrapping_abs());

pub const fn unsigned_abs(self) -> NonZero<u64>

Computes the absolute value of self without any wrapping or panicking.

Example

let u_pos = NonZero::new(1u64)?;
let i_pos = NonZero::new(1i64)?;
let i_neg = NonZero::new(-1i64)?;
let i_min = NonZero::new(i64::MIN)?;
let u_max = NonZero::new(u64::MAX / 2 + 1)?;

assert_eq!(u_pos, i_pos.unsigned_abs());
assert_eq!(u_pos, i_neg.unsigned_abs());
assert_eq!(u_max, i_min.unsigned_abs());

pub const fn is_positive(self) -> bool

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

Example

let pos_five = NonZero::new(5i64)?;
let neg_five = NonZero::new(-5i64)?;

assert!(pos_five.is_positive());
assert!(!neg_five.is_positive());

pub const fn is_negative(self) -> bool

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

Example

let pos_five = NonZero::new(5i64)?;
let neg_five = NonZero::new(-5i64)?;

assert!(neg_five.is_negative());
assert!(!pos_five.is_negative());

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

Checked negation. Computes -self, returning None if self == NonZero::<i64>::MIN.

Example

let pos_five = NonZero::new(5i64)?;
let neg_five = NonZero::new(-5i64)?;
let min = NonZero::new(i64::MIN)?;

assert_eq!(pos_five.checked_neg(), Some(neg_five));
assert_eq!(min.checked_neg(), None);

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

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

See i64::overflowing_neg for documentation on overflow behavior.

Example

let pos_five = NonZero::new(5i64)?;
let neg_five = NonZero::new(-5i64)?;
let min = NonZero::new(i64::MIN)?;

assert_eq!(pos_five.overflowing_neg(), (neg_five, false));
assert_eq!(min.overflowing_neg(), (min, true));

pub const fn saturating_neg(self) -> Self

Saturating negation. Computes -self, returning NonZero::<i64>::MAX if self == NonZero::<i64>::MIN instead of overflowing.

Example

let pos_five = NonZero::new(5i64)?;
let neg_five = NonZero::new(-5i64)?;
let min = NonZero::new(i64::MIN)?;
let min_plus_one = NonZero::new(i64::MIN + 1)?;
let max = NonZero::new(i64::MAX)?;

assert_eq!(pos_five.saturating_neg(), neg_five);
assert_eq!(min.saturating_neg(), max);
assert_eq!(max.saturating_neg(), min_plus_one);

pub const fn wrapping_neg(self) -> Self

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

See i64::wrapping_neg for documentation on overflow behavior.

Example

let pos_five = NonZero::new(5i64)?;
let neg_five = NonZero::new(-5i64)?;
let min = NonZero::new(i64::MIN)?;

assert_eq!(pos_five.wrapping_neg(), neg_five);
assert_eq!(min.wrapping_neg(), min);

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

Multiplies two non-zero integers together. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2i64)?;
let four = NonZero::new(4i64)?;
let max = NonZero::new(i64::MAX)?;

assert_eq!(Some(four), two.checked_mul(two));
assert_eq!(None, max.checked_mul(two));

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

Multiplies two non-zero integers together. Return NonZero::<i64>::MAX on overflow.

Examples

let two = NonZero::new(2i64)?;
let four = NonZero::new(4i64)?;
let max = NonZero::new(i64::MAX)?;

assert_eq!(four, two.saturating_mul(two));
assert_eq!(max, four.saturating_mul(max));

pub const unsafe fn unchecked_mul(self, other: Self) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Multiplies two non-zero integers together, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self * rhs > i64::MAX, or self * rhs < i64::MIN.

Examples

#![feature(nonzero_ops)]

let two = NonZero::new(2i64)?;
let four = NonZero::new(4i64)?;

assert_eq!(four, unsafe { two.unchecked_mul(two) });

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

Raises non-zero value to an integer power. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let three = NonZero::new(3i64)?;
let twenty_seven = NonZero::new(27i64)?;
let half_max = NonZero::new(i64::MAX / 2)?;

assert_eq!(Some(twenty_seven), three.checked_pow(3));
assert_eq!(None, half_max.checked_pow(3));

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

Raise non-zero value to an integer power. Return NonZero::<i64>::MIN or NonZero::<i64>::MAX on overflow.

Examples

let three = NonZero::new(3i64)?;
let twenty_seven = NonZero::new(27i64)?;
let max = NonZero::new(i64::MAX)?;

assert_eq!(twenty_seven, three.saturating_pow(3));
assert_eq!(max, max.saturating_pow(3));

impl NonZero<i128>

pub const BITS: u32 = 128u32

The size of this non-zero integer type in bits.

This value is equal to i128::BITS.

Examples

assert_eq!(NonZero::<i128>::BITS, i128::BITS);

pub const MIN: Self

The smallest value that can be represented by this non-zero integer type, equal to i128::MIN.

Note: While most integer types are defined for every whole number between MIN and MAX, signed non-zero integers are a special case. They have a “gap” at 0.

Examples

assert_eq!(NonZero::<i128>::MIN.get(), i128::MIN);

pub const MAX: Self

The largest value that can be represented by this non-zero integer type, equal to i128::MAX.

Note: While most integer types are defined for every whole number between MIN and MAX, signed non-zero integers are a special case. They have a “gap” at 0.

Examples

assert_eq!(NonZero::<i128>::MAX.get(), i128::MAX);

pub const fn leading_zeros(self) -> u32

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

On many architectures, this function can perform better than leading_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<i128>::new(-1i128)?;

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.

On many architectures, this function can perform better than trailing_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<i128>::new(0b0101000)?;

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

pub const fn count_ones(self) -> NonZero<u32>

🔬This is a nightly-only experimental API. (non_zero_count_ones #120287)

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

Examples

Basic usage:

#![feature(non_zero_count_ones)]

let a = NonZero::<i128>::new(0b100_0000)?;
let b = NonZero::<i128>::new(0b100_0011)?;

assert_eq!(a.count_ones(), NonZero::new(1)?);
assert_eq!(b.count_ones(), NonZero::new(3)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x13f40000000000000000000000004f76i128)?;
let m = NonZero::new(0x4f7613f4)?;

assert_eq!(n.rotate_left(16), m);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x4f7613f4i128)?;
let m = NonZero::new(0x13f40000000000000000000000004f76)?;

assert_eq!(n.rotate_right(16), m);

pub const fn swap_bytes(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

Reverses the byte order of the integer.

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x12345678901234567890123456789012i128)?;
let m = n.swap_bytes();

assert_eq!(m, NonZero::new(0x12907856341290785634129078563412)?);

pub const fn reverse_bits(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x12345678901234567890123456789012i128)?;
let m = n.reverse_bits();

assert_eq!(m, NonZero::new(0x48091e6a2c48091e6a2c48091e6a2c48)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroI128;
let n = NonZero::new(0x1Ai128)?;

if cfg!(target_endian = "big") {
    assert_eq!(NonZeroI128::from_be(n), n)
} else {
    assert_eq!(NonZeroI128::from_be(n), n.swap_bytes())
}

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroI128;
let n = NonZero::new(0x1Ai128)?;

if cfg!(target_endian = "little") {
    assert_eq!(NonZeroI128::from_le(n), n)
} else {
    assert_eq!(NonZeroI128::from_le(n), n.swap_bytes())
}

pub const fn to_be(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Ai128)?;

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) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Ai128)?;

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

pub const fn abs(self) -> Self

Computes the absolute value of self. See i128::abs for documentation on overflow behavior.

Example

let pos = NonZero::new(1i128)?;
let neg = NonZero::new(-1i128)?;

assert_eq!(pos, pos.abs());
assert_eq!(pos, neg.abs());

pub const fn checked_abs(self) -> Option<Self>

Checked absolute value. Checks for overflow and returns None if self == NonZero::<i128>::MIN. The result cannot be zero.

Example

let pos = NonZero::new(1i128)?;
let neg = NonZero::new(-1i128)?;
let min = NonZero::new(i128::MIN)?;

assert_eq!(Some(pos), neg.checked_abs());
assert_eq!(None, min.checked_abs());

pub const fn overflowing_abs(self) -> (Self, bool)

Computes the absolute value of self, with overflow information, see i128::overflowing_abs.

Example

let pos = NonZero::new(1i128)?;
let neg = NonZero::new(-1i128)?;
let min = NonZero::new(i128::MIN)?;

assert_eq!((pos, false), pos.overflowing_abs());
assert_eq!((pos, false), neg.overflowing_abs());
assert_eq!((min, true), min.overflowing_abs());

pub const fn saturating_abs(self) -> Self

Saturating absolute value, see i128::saturating_abs.

Example

let pos = NonZero::new(1i128)?;
let neg = NonZero::new(-1i128)?;
let min = NonZero::new(i128::MIN)?;
let min_plus = NonZero::new(i128::MIN + 1)?;
let max = NonZero::new(i128::MAX)?;

assert_eq!(pos, pos.saturating_abs());
assert_eq!(pos, neg.saturating_abs());
assert_eq!(max, min.saturating_abs());
assert_eq!(max, min_plus.saturating_abs());

pub const fn wrapping_abs(self) -> Self

Wrapping absolute value, see i128::wrapping_abs.

Example

let pos = NonZero::new(1i128)?;
let neg = NonZero::new(-1i128)?;
let min = NonZero::new(i128::MIN)?;

assert_eq!(pos, pos.wrapping_abs());
assert_eq!(pos, neg.wrapping_abs());
assert_eq!(min, min.wrapping_abs());
assert_eq!(max, (-max).wrapping_abs());

pub const fn unsigned_abs(self) -> NonZero<u128>

Computes the absolute value of self without any wrapping or panicking.

Example

let u_pos = NonZero::new(1u128)?;
let i_pos = NonZero::new(1i128)?;
let i_neg = NonZero::new(-1i128)?;
let i_min = NonZero::new(i128::MIN)?;
let u_max = NonZero::new(u128::MAX / 2 + 1)?;

assert_eq!(u_pos, i_pos.unsigned_abs());
assert_eq!(u_pos, i_neg.unsigned_abs());
assert_eq!(u_max, i_min.unsigned_abs());

pub const fn is_positive(self) -> bool

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

Example

let pos_five = NonZero::new(5i128)?;
let neg_five = NonZero::new(-5i128)?;

assert!(pos_five.is_positive());
assert!(!neg_five.is_positive());

pub const fn is_negative(self) -> bool

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

Example

let pos_five = NonZero::new(5i128)?;
let neg_five = NonZero::new(-5i128)?;

assert!(neg_five.is_negative());
assert!(!pos_five.is_negative());

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

Checked negation. Computes -self, returning None if self == NonZero::<i128>::MIN.

Example

let pos_five = NonZero::new(5i128)?;
let neg_five = NonZero::new(-5i128)?;
let min = NonZero::new(i128::MIN)?;

assert_eq!(pos_five.checked_neg(), Some(neg_five));
assert_eq!(min.checked_neg(), None);

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

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

See i128::overflowing_neg for documentation on overflow behavior.

Example

let pos_five = NonZero::new(5i128)?;
let neg_five = NonZero::new(-5i128)?;
let min = NonZero::new(i128::MIN)?;

assert_eq!(pos_five.overflowing_neg(), (neg_five, false));
assert_eq!(min.overflowing_neg(), (min, true));

pub const fn saturating_neg(self) -> Self

Saturating negation. Computes -self, returning NonZero::<i128>::MAX if self == NonZero::<i128>::MIN instead of overflowing.

Example

let pos_five = NonZero::new(5i128)?;
let neg_five = NonZero::new(-5i128)?;
let min = NonZero::new(i128::MIN)?;
let min_plus_one = NonZero::new(i128::MIN + 1)?;
let max = NonZero::new(i128::MAX)?;

assert_eq!(pos_five.saturating_neg(), neg_five);
assert_eq!(min.saturating_neg(), max);
assert_eq!(max.saturating_neg(), min_plus_one);

pub const fn wrapping_neg(self) -> Self

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

See i128::wrapping_neg for documentation on overflow behavior.

Example

let pos_five = NonZero::new(5i128)?;
let neg_five = NonZero::new(-5i128)?;
let min = NonZero::new(i128::MIN)?;

assert_eq!(pos_five.wrapping_neg(), neg_five);
assert_eq!(min.wrapping_neg(), min);

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

Multiplies two non-zero integers together. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2i128)?;
let four = NonZero::new(4i128)?;
let max = NonZero::new(i128::MAX)?;

assert_eq!(Some(four), two.checked_mul(two));
assert_eq!(None, max.checked_mul(two));

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

Multiplies two non-zero integers together. Return NonZero::<i128>::MAX on overflow.

Examples

let two = NonZero::new(2i128)?;
let four = NonZero::new(4i128)?;
let max = NonZero::new(i128::MAX)?;

assert_eq!(four, two.saturating_mul(two));
assert_eq!(max, four.saturating_mul(max));

pub const unsafe fn unchecked_mul(self, other: Self) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Multiplies two non-zero integers together, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self * rhs > i128::MAX, or self * rhs < i128::MIN.

Examples

#![feature(nonzero_ops)]

let two = NonZero::new(2i128)?;
let four = NonZero::new(4i128)?;

assert_eq!(four, unsafe { two.unchecked_mul(two) });

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

Raises non-zero value to an integer power. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let three = NonZero::new(3i128)?;
let twenty_seven = NonZero::new(27i128)?;
let half_max = NonZero::new(i128::MAX / 2)?;

assert_eq!(Some(twenty_seven), three.checked_pow(3));
assert_eq!(None, half_max.checked_pow(3));

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

Raise non-zero value to an integer power. Return NonZero::<i128>::MIN or NonZero::<i128>::MAX on overflow.

Examples

let three = NonZero::new(3i128)?;
let twenty_seven = NonZero::new(27i128)?;
let max = NonZero::new(i128::MAX)?;

assert_eq!(twenty_seven, three.saturating_pow(3));
assert_eq!(max, max.saturating_pow(3));

impl NonZero<isize>

pub const BITS: u32 = 64u32

The size of this non-zero integer type in bits.

This value is equal to isize::BITS.

Examples

assert_eq!(NonZero::<isize>::BITS, isize::BITS);

pub const MIN: Self

The smallest value that can be represented by this non-zero integer type, equal to isize::MIN.

Note: While most integer types are defined for every whole number between MIN and MAX, signed non-zero integers are a special case. They have a “gap” at 0.

Examples

assert_eq!(NonZero::<isize>::MIN.get(), isize::MIN);

pub const MAX: Self

The largest value that can be represented by this non-zero integer type, equal to isize::MAX.

Note: While most integer types are defined for every whole number between MIN and MAX, signed non-zero integers are a special case. They have a “gap” at 0.

Examples

assert_eq!(NonZero::<isize>::MAX.get(), isize::MAX);

pub const fn leading_zeros(self) -> u32

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

On many architectures, this function can perform better than leading_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<isize>::new(-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.

On many architectures, this function can perform better than trailing_zeros() on the underlying integer type, as special handling of zero can be avoided.

Examples

Basic usage:

let n = NonZero::<isize>::new(0b0101000)?;

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

pub const fn count_ones(self) -> NonZero<u32>

🔬This is a nightly-only experimental API. (non_zero_count_ones #120287)

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

Examples

Basic usage:

#![feature(non_zero_count_ones)]

let a = NonZero::<isize>::new(0b100_0000)?;
let b = NonZero::<isize>::new(0b100_0011)?;

assert_eq!(a.count_ones(), NonZero::new(1)?);
assert_eq!(b.count_ones(), NonZero::new(3)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0xaa00000000006e1isize)?;
let m = NonZero::new(0x6e10aa)?;

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

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x6e10aaisize)?;
let m = NonZero::new(0xaa00000000006e1)?;

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

pub const fn swap_bytes(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

Reverses the byte order of the integer.

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1234567890123456isize)?;
let m = n.swap_bytes();

assert_eq!(m, NonZero::new(0x5634129078563412)?);

pub const fn reverse_bits(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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

Examples

Basic usage:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1234567890123456isize)?;
let m = n.reverse_bits();

assert_eq!(m, NonZero::new(0x6a2c48091e6a2c48)?);

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroIsize;
let n = NonZero::new(0x1Aisize)?;

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

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

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
use std::num::NonZeroIsize;
let n = NonZero::new(0x1Aisize)?;

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

pub const fn to_be(self) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(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) -> Self

🔬This is a nightly-only experimental API. (nonzero_bitwise #128281)

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:

#![feature(nonzero_bitwise)]
let n = NonZero::new(0x1Aisize)?;

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

pub const fn abs(self) -> Self

Computes the absolute value of self. See isize::abs for documentation on overflow behavior.

Example

let pos = NonZero::new(1isize)?;
let neg = NonZero::new(-1isize)?;

assert_eq!(pos, pos.abs());
assert_eq!(pos, neg.abs());

pub const fn checked_abs(self) -> Option<Self>

Checked absolute value. Checks for overflow and returns None if self == NonZero::<isize>::MIN. The result cannot be zero.

Example

let pos = NonZero::new(1isize)?;
let neg = NonZero::new(-1isize)?;
let min = NonZero::new(isize::MIN)?;

assert_eq!(Some(pos), neg.checked_abs());
assert_eq!(None, min.checked_abs());

pub const fn overflowing_abs(self) -> (Self, bool)

Computes the absolute value of self, with overflow information, see isize::overflowing_abs.

Example

let pos = NonZero::new(1isize)?;
let neg = NonZero::new(-1isize)?;
let min = NonZero::new(isize::MIN)?;

assert_eq!((pos, false), pos.overflowing_abs());
assert_eq!((pos, false), neg.overflowing_abs());
assert_eq!((min, true), min.overflowing_abs());

pub const fn saturating_abs(self) -> Self

Saturating absolute value, see isize::saturating_abs.

Example

let pos = NonZero::new(1isize)?;
let neg = NonZero::new(-1isize)?;
let min = NonZero::new(isize::MIN)?;
let min_plus = NonZero::new(isize::MIN + 1)?;
let max = NonZero::new(isize::MAX)?;

assert_eq!(pos, pos.saturating_abs());
assert_eq!(pos, neg.saturating_abs());
assert_eq!(max, min.saturating_abs());
assert_eq!(max, min_plus.saturating_abs());

pub const fn wrapping_abs(self) -> Self

Wrapping absolute value, see isize::wrapping_abs.

Example

let pos = NonZero::new(1isize)?;
let neg = NonZero::new(-1isize)?;
let min = NonZero::new(isize::MIN)?;

assert_eq!(pos, pos.wrapping_abs());
assert_eq!(pos, neg.wrapping_abs());
assert_eq!(min, min.wrapping_abs());
assert_eq!(max, (-max).wrapping_abs());

pub const fn unsigned_abs(self) -> NonZero<usize>

Computes the absolute value of self without any wrapping or panicking.

Example

let u_pos = NonZero::new(1usize)?;
let i_pos = NonZero::new(1isize)?;
let i_neg = NonZero::new(-1isize)?;
let i_min = NonZero::new(isize::MIN)?;
let u_max = NonZero::new(usize::MAX / 2 + 1)?;

assert_eq!(u_pos, i_pos.unsigned_abs());
assert_eq!(u_pos, i_neg.unsigned_abs());
assert_eq!(u_max, i_min.unsigned_abs());

pub const fn is_positive(self) -> bool

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

Example

let pos_five = NonZero::new(5isize)?;
let neg_five = NonZero::new(-5isize)?;

assert!(pos_five.is_positive());
assert!(!neg_five.is_positive());

pub const fn is_negative(self) -> bool

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

Example

let pos_five = NonZero::new(5isize)?;
let neg_five = NonZero::new(-5isize)?;

assert!(neg_five.is_negative());
assert!(!pos_five.is_negative());

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

Checked negation. Computes -self, returning None if self == NonZero::<isize>::MIN.

Example

let pos_five = NonZero::new(5isize)?;
let neg_five = NonZero::new(-5isize)?;
let min = NonZero::new(isize::MIN)?;

assert_eq!(pos_five.checked_neg(), Some(neg_five));
assert_eq!(min.checked_neg(), None);

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

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

See isize::overflowing_neg for documentation on overflow behavior.

Example

let pos_five = NonZero::new(5isize)?;
let neg_five = NonZero::new(-5isize)?;
let min = NonZero::new(isize::MIN)?;

assert_eq!(pos_five.overflowing_neg(), (neg_five, false));
assert_eq!(min.overflowing_neg(), (min, true));

pub const fn saturating_neg(self) -> Self

Saturating negation. Computes -self, returning NonZero::<isize>::MAX if self == NonZero::<isize>::MIN instead of overflowing.

Example

let pos_five = NonZero::new(5isize)?;
let neg_five = NonZero::new(-5isize)?;
let min = NonZero::new(isize::MIN)?;
let min_plus_one = NonZero::new(isize::MIN + 1)?;
let max = NonZero::new(isize::MAX)?;

assert_eq!(pos_five.saturating_neg(), neg_five);
assert_eq!(min.saturating_neg(), max);
assert_eq!(max.saturating_neg(), min_plus_one);

pub const fn wrapping_neg(self) -> Self

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

See isize::wrapping_neg for documentation on overflow behavior.

Example

let pos_five = NonZero::new(5isize)?;
let neg_five = NonZero::new(-5isize)?;
let min = NonZero::new(isize::MIN)?;

assert_eq!(pos_five.wrapping_neg(), neg_five);
assert_eq!(min.wrapping_neg(), min);

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

Multiplies two non-zero integers together. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let two = NonZero::new(2isize)?;
let four = NonZero::new(4isize)?;
let max = NonZero::new(isize::MAX)?;

assert_eq!(Some(four), two.checked_mul(two));
assert_eq!(None, max.checked_mul(two));

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

Multiplies two non-zero integers together. Return NonZero::<isize>::MAX on overflow.

Examples

let two = NonZero::new(2isize)?;
let four = NonZero::new(4isize)?;
let max = NonZero::new(isize::MAX)?;

assert_eq!(four, two.saturating_mul(two));
assert_eq!(max, four.saturating_mul(max));

pub const unsafe fn unchecked_mul(self, other: Self) -> Self

🔬This is a nightly-only experimental API. (nonzero_ops #84186)

Multiplies two non-zero integers together, assuming overflow cannot occur. Overflow is unchecked, and it is undefined behavior to overflow even if the result would wrap to a non-zero value. The behavior is undefined as soon as self * rhs > isize::MAX, or self * rhs < isize::MIN.

Examples

#![feature(nonzero_ops)]

let two = NonZero::new(2isize)?;
let four = NonZero::new(4isize)?;

assert_eq!(four, unsafe { two.unchecked_mul(two) });

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

Raises non-zero value to an integer power. Checks for overflow and returns None on overflow. As a consequence, the result cannot wrap to zero.

Examples

let three = NonZero::new(3isize)?;
let twenty_seven = NonZero::new(27isize)?;
let half_max = NonZero::new(isize::MAX / 2)?;

assert_eq!(Some(twenty_seven), three.checked_pow(3));
assert_eq!(None, half_max.checked_pow(3));

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

Raise non-zero value to an integer power. Return NonZero::<isize>::MIN or NonZero::<isize>::MAX on overflow.

Examples

let three = NonZero::new(3isize)?;
let twenty_seven = NonZero::new(27isize)?;
let max = NonZero::new(isize::MAX)?;

assert_eq!(twenty_seven, three.saturating_pow(3));
assert_eq!(max, max.saturating_pow(3));

Trait Implementations

impl<T> Binary for NonZero<T>

where T: ZeroablePrimitive + Binary,

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

Formats the value using the given formatter.

impl<T> BitOr<T> for NonZero<T>

where T: ZeroablePrimitive + BitOr<Output = T>,

type Output = NonZero<T>

The resulting type after applying the | operator.

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

Performs the | operation.

impl<T> BitOr for NonZero<T>

where T: ZeroablePrimitive + BitOr<Output = T>,

type Output = NonZero<T>

The resulting type after applying the | operator.

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

Performs the | operation.

impl<T> BitOrAssign<T> for NonZero<T>

where T: ZeroablePrimitive, Self: BitOr<T, Output = Self>,

fn bitor_assign(&mut self, rhs: T)

Performs the |= operation.

impl<T> BitOrAssign for NonZero<T>

where T: ZeroablePrimitive, Self: BitOr<Output = Self>,

fn bitor_assign(&mut self, rhs: Self)

Performs the |= operation.

impl<T> Clone for NonZero<T>

where T: ZeroablePrimitive,

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T> Debug for NonZero<T>

where T: ZeroablePrimitive + Debug,

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

Formats the value using the given formatter.

impl<T> Display for NonZero<T>

where T: ZeroablePrimitive + Display,

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

Formats the value using the given formatter.

impl Div<NonZero<u128>> for u128

fn div(self, other: NonZero<u128>) -> u128

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

type Output = u128

The resulting type after applying the / operator.

impl Div<NonZero<u16>> for u16

fn div(self, other: NonZero<u16>) -> u16

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

type Output = u16

The resulting type after applying the / operator.

impl Div<NonZero<u32>> for u32

fn div(self, other: NonZero<u32>) -> u32

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

type Output = u32

The resulting type after applying the / operator.

impl Div<NonZero<u64>> for u64

fn div(self, other: NonZero<u64>) -> u64

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

type Output = u64

The resulting type after applying the / operator.

impl Div<NonZero<u8>> for u8

fn div(self, other: NonZero<u8>) -> u8

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

type Output = u8

The resulting type after applying the / operator.

impl Div<NonZero<usize>> for usize

fn div(self, other: NonZero<usize>) -> usize

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

type Output = usize

The resulting type after applying the / operator.

impl DivAssign<NonZero<u128>> for u128

fn div_assign(&mut self, other: NonZero<u128>)

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

impl DivAssign<NonZero<u16>> for u16

fn div_assign(&mut self, other: NonZero<u16>)

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

impl DivAssign<NonZero<u32>> for u32

fn div_assign(&mut self, other: NonZero<u32>)

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

impl DivAssign<NonZero<u64>> for u64

fn div_assign(&mut self, other: NonZero<u64>)

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

impl DivAssign<NonZero<u8>> for u8

fn div_assign(&mut self, other: NonZero<u8>)

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

impl DivAssign<NonZero<usize>> for usize

fn div_assign(&mut self, other: NonZero<usize>)

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

impl From<Alignment> for NonZero<usize>

fn from(align: Alignment) -> NonZero<usize>

Converts to this type from the input type.

impl From<NonZero<i16>> for NonZero<i128>

fn from(small: NonZero<i16>) -> Self

Converts NonZero<i16> to NonZero<i128> losslessly.

impl From<NonZero<i16>> for NonZero<i32>

fn from(small: NonZero<i16>) -> Self

Converts NonZero<i16> to NonZero<i32> losslessly.

impl From<NonZero<i16>> for NonZero<i64>

fn from(small: NonZero<i16>) -> Self

Converts NonZero<i16> to NonZero<i64> losslessly.

impl From<NonZero<i16>> for NonZero<isize>

fn from(small: NonZero<i16>) -> Self

Converts NonZero<i16> to NonZero<isize> losslessly.

impl From<NonZero<i32>> for NonZero<i128>

fn from(small: NonZero<i32>) -> Self

Converts NonZero<i32> to NonZero<i128> losslessly.

impl From<NonZero<i32>> for NonZero<i64>

fn from(small: NonZero<i32>) -> Self

Converts NonZero<i32> to NonZero<i64> losslessly.

impl From<NonZero<i64>> for NonZero<i128>

fn from(small: NonZero<i64>) -> Self

Converts NonZero<i64> to NonZero<i128> losslessly.

impl From<NonZero<i8>> for NonZero<i128>

fn from(small: NonZero<i8>) -> Self

Converts NonZero<i8> to NonZero<i128> losslessly.

impl From<NonZero<i8>> for NonZero<i16>

fn from(small: NonZero<i8>) -> Self

Converts NonZero<i8> to NonZero<i16> losslessly.

impl From<NonZero<i8>> for NonZero<i32>

fn from(small: NonZero<i8>) -> Self

Converts NonZero<i8> to NonZero<i32> losslessly.

impl From<NonZero<i8>> for NonZero<i64>

fn from(small: NonZero<i8>) -> Self

Converts NonZero<i8> to NonZero<i64> losslessly.

impl From<NonZero<i8>> for NonZero<isize>

fn from(small: NonZero<i8>) -> Self

Converts NonZero<i8> to NonZero<isize> losslessly.

impl From<NonZero<u16>> for NonZero<i128>

fn from(small: NonZero<u16>) -> Self

Converts NonZero<u16> to NonZero<i128> losslessly.

impl From<NonZero<u16>> for NonZero<i32>

fn from(small: NonZero<u16>) -> Self

Converts NonZero<u16> to NonZero<i32> losslessly.

impl From<NonZero<u16>> for NonZero<i64>

fn from(small: NonZero<u16>) -> Self

Converts NonZero<u16> to NonZero<i64> losslessly.

impl From<NonZero<u16>> for NonZero<u128>

fn from(small: NonZero<u16>) -> Self

Converts NonZero<u16> to NonZero<u128> losslessly.

impl From<NonZero<u16>> for NonZero<u32>

fn from(small: NonZero<u16>) -> Self

Converts NonZero<u16> to NonZero<u32> losslessly.

impl From<NonZero<u16>> for NonZero<u64>

fn from(small: NonZero<u16>) -> Self

Converts NonZero<u16> to NonZero<u64> losslessly.

impl From<NonZero<u16>> for NonZero<usize>

fn from(small: NonZero<u16>) -> Self

Converts NonZero<u16> to NonZero<usize> losslessly.

impl From<NonZero<u32>> for NonZero<i128>

fn from(small: NonZero<u32>) -> Self

Converts NonZero<u32> to NonZero<i128> losslessly.

impl From<NonZero<u32>> for NonZero<i64>

fn from(small: NonZero<u32>) -> Self

Converts NonZero<u32> to NonZero<i64> losslessly.

impl From<NonZero<u32>> for NonZero<u128>

fn from(small: NonZero<u32>) -> Self

Converts NonZero<u32> to NonZero<u128> losslessly.

impl From<NonZero<u32>> for NonZero<u64>

fn from(small: NonZero<u32>) -> Self

Converts NonZero<u32> to NonZero<u64> losslessly.

impl From<NonZero<u64>> for NonZero<i128>

fn from(small: NonZero<u64>) -> Self

Converts NonZero<u64> to NonZero<i128> losslessly.

impl From<NonZero<u64>> for NonZero<u128>

fn from(small: NonZero<u64>) -> Self

Converts NonZero<u64> to NonZero<u128> losslessly.

impl From<NonZero<u8>> for NonZero<i128>

fn from(small: NonZero<u8>) -> Self

Converts NonZero<u8> to NonZero<i128> losslessly.

impl From<NonZero<u8>> for NonZero<i16>

fn from(small: NonZero<u8>) -> Self

Converts NonZero<u8> to NonZero<i16> losslessly.

impl From<NonZero<u8>> for NonZero<i32>

fn from(small: NonZero<u8>) -> Self

Converts NonZero<u8> to NonZero<i32> losslessly.

impl From<NonZero<u8>> for NonZero<i64>

fn from(small: NonZero<u8>) -> Self

Converts NonZero<u8> to NonZero<i64> losslessly.

impl From<NonZero<u8>> for NonZero<isize>

fn from(small: NonZero<u8>) -> Self

Converts NonZero<u8> to NonZero<isize> losslessly.

impl From<NonZero<u8>> for NonZero<u128>

fn from(small: NonZero<u8>) -> Self

Converts NonZero<u8> to NonZero<u128> losslessly.

impl From<NonZero<u8>> for NonZero<u16>

fn from(small: NonZero<u8>) -> Self

Converts NonZero<u8> to NonZero<u16> losslessly.

impl From<NonZero<u8>> for NonZero<u32>

fn from(small: NonZero<u8>) -> Self

Converts NonZero<u8> to NonZero<u32> losslessly.

impl From<NonZero<u8>> for NonZero<u64>

fn from(small: NonZero<u8>) -> Self

Converts NonZero<u8> to NonZero<u64> losslessly.

impl From<NonZero<u8>> for NonZero<usize>

fn from(small: NonZero<u8>) -> Self

Converts NonZero<u8> to NonZero<usize> losslessly.

impl FromStr for NonZero<i128>

type Err = ParseIntError

The associated error which can be returned from parsing.

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

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

impl FromStr for NonZero<i16>

type Err = ParseIntError

The associated error which can be returned from parsing.

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

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

impl FromStr for NonZero<i32>

type Err = ParseIntError

The associated error which can be returned from parsing.

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

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

impl FromStr for NonZero<i64>

type Err = ParseIntError

The associated error which can be returned from parsing.

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

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

impl FromStr for NonZero<i8>

type Err = ParseIntError

The associated error which can be returned from parsing.

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

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

impl FromStr for NonZero<isize>

type Err = ParseIntError

The associated error which can be returned from parsing.

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

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

impl FromStr for NonZero<u128>

type Err = ParseIntError

The associated error which can be returned from parsing.

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

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

impl FromStr for NonZero<u16>

type Err = ParseIntError

The associated error which can be returned from parsing.

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

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

impl FromStr for NonZero<u32>

type Err = ParseIntError

The associated error which can be returned from parsing.

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

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

impl FromStr for NonZero<u64>

type Err = ParseIntError

The associated error which can be returned from parsing.

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

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

impl FromStr for NonZero<u8>

type Err = ParseIntError

The associated error which can be returned from parsing.

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

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

impl FromStr for NonZero<usize>

type Err = ParseIntError

The associated error which can be returned from parsing.

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

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

impl<T> Hash for NonZero<T>

where T: ZeroablePrimitive + Hash,

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

where H: Hasher,

Feeds this value into the given Hasher.

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

where Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T> LowerExp for NonZero<T>

where T: ZeroablePrimitive + LowerExp,

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

Formats the value using the given formatter.

impl<T> LowerHex for NonZero<T>

where T: ZeroablePrimitive + LowerHex,

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

Formats the value using the given formatter.

impl Neg for &NonZero<i128>

type Output = <NonZero<i128> as Neg>::Output

The resulting type after applying the - operator.

fn neg(self) -> <NonZero<i128> as Neg>::Output

Performs the unary - operation.

impl Neg for &NonZero<i16>

type Output = <NonZero<i16> as Neg>::Output

The resulting type after applying the - operator.

fn neg(self) -> <NonZero<i16> as Neg>::Output

Performs the unary - operation.

impl Neg for &NonZero<i32>

type Output = <NonZero<i32> as Neg>::Output

The resulting type after applying the - operator.

fn neg(self) -> <NonZero<i32> as Neg>::Output

Performs the unary - operation.

impl Neg for &NonZero<i64>

type Output = <NonZero<i64> as Neg>::Output

The resulting type after applying the - operator.

fn neg(self) -> <NonZero<i64> as Neg>::Output

Performs the unary - operation.

impl Neg for &NonZero<i8>

type Output = <NonZero<i8> as Neg>::Output

The resulting type after applying the - operator.

fn neg(self) -> <NonZero<i8> as Neg>::Output

Performs the unary - operation.

impl Neg for &NonZero<isize>

type Output = <NonZero<isize> as Neg>::Output

The resulting type after applying the - operator.

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

Performs the unary - operation.

impl Neg for NonZero<i128>

type Output = NonZero<i128>

The resulting type after applying the - operator.

fn neg(self) -> Self

Performs the unary - operation.

impl Neg for NonZero<i16>

type Output = NonZero<i16>

The resulting type after applying the - operator.

fn neg(self) -> Self

Performs the unary - operation.

impl Neg for NonZero<i32>

type Output = NonZero<i32>

The resulting type after applying the - operator.

fn neg(self) -> Self

Performs the unary - operation.

impl Neg for NonZero<i64>

type Output = NonZero<i64>

The resulting type after applying the - operator.

fn neg(self) -> Self

Performs the unary - operation.

impl Neg for NonZero<i8>

type Output = NonZero<i8>

The resulting type after applying the - operator.

fn neg(self) -> Self

Performs the unary - operation.

impl Neg for NonZero<isize>

type Output = NonZero<isize>

The resulting type after applying the - operator.

fn neg(self) -> Self

Performs the unary - operation.

impl<T> Octal for NonZero<T>

where T: ZeroablePrimitive + Octal,

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

Formats the value using the given formatter.

impl<T> Ord for NonZero<T>

where T: ZeroablePrimitive + Ord,

fn cmp(&self, other: &Self) -> 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

Restrict a value to a certain interval.

impl<T> PartialEq for NonZero<T>

where T: ZeroablePrimitive + PartialEq,

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

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

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

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

impl<T> PartialOrd for NonZero<T>

where T: ZeroablePrimitive + PartialOrd,

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

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

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

Tests less than (for self and other) and is used by the < operator.

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

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

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

Tests greater than (for self and other) and is used by the > operator.

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

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

impl Rem<NonZero<u128>> for u128

fn rem(self, other: NonZero<u128>) -> u128

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

type Output = u128

The resulting type after applying the % operator.

impl Rem<NonZero<u16>> for u16

fn rem(self, other: NonZero<u16>) -> u16

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

type Output = u16

The resulting type after applying the % operator.

impl Rem<NonZero<u32>> for u32

fn rem(self, other: NonZero<u32>) -> u32

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

type Output = u32

The resulting type after applying the % operator.

impl Rem<NonZero<u64>> for u64

fn rem(self, other: NonZero<u64>) -> u64

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

type Output = u64

The resulting type after applying the % operator.

impl Rem<NonZero<u8>> for u8

fn rem(self, other: NonZero<u8>) -> u8

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

type Output = u8

The resulting type after applying the % operator.

impl Rem<NonZero<usize>> for usize

fn rem(self, other: NonZero<usize>) -> usize

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

type Output = usize

The resulting type after applying the % operator.

impl RemAssign<NonZero<u128>> for u128

fn rem_assign(&mut self, other: NonZero<u128>)

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

impl RemAssign<NonZero<u16>> for u16

fn rem_assign(&mut self, other: NonZero<u16>)

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

impl RemAssign<NonZero<u32>> for u32

fn rem_assign(&mut self, other: NonZero<u32>)

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

impl RemAssign<NonZero<u64>> for u64

fn rem_assign(&mut self, other: NonZero<u64>)

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

impl RemAssign<NonZero<u8>> for u8

fn rem_assign(&mut self, other: NonZero<u8>)

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

impl RemAssign<NonZero<usize>> for usize

fn rem_assign(&mut self, other: NonZero<usize>)

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

impl TryFrom<NonZero<i128>> for NonZero<i16>

fn try_from(value: NonZero<i128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i128> to NonZero<i16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i128>> for NonZero<i32>

fn try_from(value: NonZero<i128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i128> to NonZero<i32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i128>> for NonZero<i64>

fn try_from(value: NonZero<i128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i128> to NonZero<i64>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i128>> for NonZero<i8>

fn try_from(value: NonZero<i128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i128> to NonZero<i8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i128>> for NonZero<isize>

fn try_from(value: NonZero<i128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i128> to NonZero<isize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i128>> for NonZero<u128>

fn try_from(value: NonZero<i128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i128> to NonZero<u128>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i128>> for NonZero<u16>

fn try_from(value: NonZero<i128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i128> to NonZero<u16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i128>> for NonZero<u32>

fn try_from(value: NonZero<i128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i128> to NonZero<u32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i128>> for NonZero<u64>

fn try_from(value: NonZero<i128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i128> to NonZero<u64>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i128>> for NonZero<u8>

fn try_from(value: NonZero<i128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i128> to NonZero<u8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i128>> for NonZero<usize>

fn try_from(value: NonZero<i128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i128> to NonZero<usize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i16>> for NonZero<i8>

fn try_from(value: NonZero<i16>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i16> to NonZero<i8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i16>> for NonZero<u128>

fn try_from(value: NonZero<i16>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i16> to NonZero<u128>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i16>> for NonZero<u16>

fn try_from(value: NonZero<i16>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i16> to NonZero<u16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i16>> for NonZero<u32>

fn try_from(value: NonZero<i16>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i16> to NonZero<u32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i16>> for NonZero<u64>

fn try_from(value: NonZero<i16>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i16> to NonZero<u64>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i16>> for NonZero<u8>

fn try_from(value: NonZero<i16>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i16> to NonZero<u8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i16>> for NonZero<usize>

fn try_from(value: NonZero<i16>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i16> to NonZero<usize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i32>> for NonZero<i16>

fn try_from(value: NonZero<i32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i32> to NonZero<i16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i32>> for NonZero<i8>

fn try_from(value: NonZero<i32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i32> to NonZero<i8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i32>> for NonZero<isize>

fn try_from(value: NonZero<i32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i32> to NonZero<isize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i32>> for NonZero<u128>

fn try_from(value: NonZero<i32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i32> to NonZero<u128>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i32>> for NonZero<u16>

fn try_from(value: NonZero<i32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i32> to NonZero<u16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i32>> for NonZero<u32>

fn try_from(value: NonZero<i32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i32> to NonZero<u32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i32>> for NonZero<u64>

fn try_from(value: NonZero<i32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i32> to NonZero<u64>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i32>> for NonZero<u8>

fn try_from(value: NonZero<i32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i32> to NonZero<u8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i32>> for NonZero<usize>

fn try_from(value: NonZero<i32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i32> to NonZero<usize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i64>> for NonZero<i16>

fn try_from(value: NonZero<i64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i64> to NonZero<i16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i64>> for NonZero<i32>

fn try_from(value: NonZero<i64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i64> to NonZero<i32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i64>> for NonZero<i8>

fn try_from(value: NonZero<i64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i64> to NonZero<i8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i64>> for NonZero<isize>

fn try_from(value: NonZero<i64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i64> to NonZero<isize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i64>> for NonZero<u128>

fn try_from(value: NonZero<i64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i64> to NonZero<u128>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i64>> for NonZero<u16>

fn try_from(value: NonZero<i64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i64> to NonZero<u16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i64>> for NonZero<u32>

fn try_from(value: NonZero<i64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i64> to NonZero<u32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i64>> for NonZero<u64>

fn try_from(value: NonZero<i64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i64> to NonZero<u64>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i64>> for NonZero<u8>

fn try_from(value: NonZero<i64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i64> to NonZero<u8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i64>> for NonZero<usize>

fn try_from(value: NonZero<i64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i64> to NonZero<usize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i8>> for NonZero<u128>

fn try_from(value: NonZero<i8>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i8> to NonZero<u128>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i8>> for NonZero<u16>

fn try_from(value: NonZero<i8>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i8> to NonZero<u16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i8>> for NonZero<u32>

fn try_from(value: NonZero<i8>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i8> to NonZero<u32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i8>> for NonZero<u64>

fn try_from(value: NonZero<i8>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i8> to NonZero<u64>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i8>> for NonZero<u8>

fn try_from(value: NonZero<i8>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i8> to NonZero<u8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<i8>> for NonZero<usize>

fn try_from(value: NonZero<i8>) -> Result<Self, Self::Error>

Attempts to convert NonZero<i8> to NonZero<usize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<isize>> for NonZero<i128>

fn try_from(value: NonZero<isize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<isize> to NonZero<i128>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<isize>> for NonZero<i16>

fn try_from(value: NonZero<isize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<isize> to NonZero<i16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<isize>> for NonZero<i32>

fn try_from(value: NonZero<isize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<isize> to NonZero<i32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<isize>> for NonZero<i64>

fn try_from(value: NonZero<isize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<isize> to NonZero<i64>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<isize>> for NonZero<i8>

fn try_from(value: NonZero<isize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<isize> to NonZero<i8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<isize>> for NonZero<u128>

fn try_from(value: NonZero<isize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<isize> to NonZero<u128>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<isize>> for NonZero<u16>

fn try_from(value: NonZero<isize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<isize> to NonZero<u16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<isize>> for NonZero<u32>

fn try_from(value: NonZero<isize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<isize> to NonZero<u32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<isize>> for NonZero<u64>

fn try_from(value: NonZero<isize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<isize> to NonZero<u64>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<isize>> for NonZero<u8>

fn try_from(value: NonZero<isize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<isize> to NonZero<u8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<isize>> for NonZero<usize>

fn try_from(value: NonZero<isize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<isize> to NonZero<usize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u128>> for NonZero<i128>

fn try_from(value: NonZero<u128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u128> to NonZero<i128>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u128>> for NonZero<i16>

fn try_from(value: NonZero<u128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u128> to NonZero<i16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u128>> for NonZero<i32>

fn try_from(value: NonZero<u128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u128> to NonZero<i32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u128>> for NonZero<i64>

fn try_from(value: NonZero<u128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u128> to NonZero<i64>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u128>> for NonZero<i8>

fn try_from(value: NonZero<u128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u128> to NonZero<i8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u128>> for NonZero<isize>

fn try_from(value: NonZero<u128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u128> to NonZero<isize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u128>> for NonZero<u16>

fn try_from(value: NonZero<u128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u128> to NonZero<u16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u128>> for NonZero<u32>

fn try_from(value: NonZero<u128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u128> to NonZero<u32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u128>> for NonZero<u64>

fn try_from(value: NonZero<u128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u128> to NonZero<u64>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u128>> for NonZero<u8>

fn try_from(value: NonZero<u128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u128> to NonZero<u8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u128>> for NonZero<usize>

fn try_from(value: NonZero<u128>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u128> to NonZero<usize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u16>> for NonZero<i16>

fn try_from(value: NonZero<u16>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u16> to NonZero<i16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u16>> for NonZero<i8>

fn try_from(value: NonZero<u16>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u16> to NonZero<i8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u16>> for NonZero<isize>

fn try_from(value: NonZero<u16>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u16> to NonZero<isize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u16>> for NonZero<u8>

fn try_from(value: NonZero<u16>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u16> to NonZero<u8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u32>> for NonZero<i16>

fn try_from(value: NonZero<u32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u32> to NonZero<i16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u32>> for NonZero<i32>

fn try_from(value: NonZero<u32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u32> to NonZero<i32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u32>> for NonZero<i8>

fn try_from(value: NonZero<u32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u32> to NonZero<i8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u32>> for NonZero<isize>

fn try_from(value: NonZero<u32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u32> to NonZero<isize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u32>> for NonZero<u16>

fn try_from(value: NonZero<u32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u32> to NonZero<u16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u32>> for NonZero<u8>

fn try_from(value: NonZero<u32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u32> to NonZero<u8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u32>> for NonZero<usize>

fn try_from(value: NonZero<u32>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u32> to NonZero<usize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u64>> for NonZero<i16>

fn try_from(value: NonZero<u64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u64> to NonZero<i16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u64>> for NonZero<i32>

fn try_from(value: NonZero<u64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u64> to NonZero<i32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u64>> for NonZero<i64>

fn try_from(value: NonZero<u64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u64> to NonZero<i64>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u64>> for NonZero<i8>

fn try_from(value: NonZero<u64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u64> to NonZero<i8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u64>> for NonZero<isize>

fn try_from(value: NonZero<u64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u64> to NonZero<isize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u64>> for NonZero<u16>

fn try_from(value: NonZero<u64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u64> to NonZero<u16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u64>> for NonZero<u32>

fn try_from(value: NonZero<u64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u64> to NonZero<u32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u64>> for NonZero<u8>

fn try_from(value: NonZero<u64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u64> to NonZero<u8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u64>> for NonZero<usize>

fn try_from(value: NonZero<u64>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u64> to NonZero<usize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<u8>> for NonZero<i8>

fn try_from(value: NonZero<u8>) -> Result<Self, Self::Error>

Attempts to convert NonZero<u8> to NonZero<i8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<usize>> for Alignment

type Error = TryFromIntError

The type returned in the event of a conversion error.

fn try_from(align: NonZero<usize>) -> Result<Alignment, Self::Error>

Performs the conversion.

impl TryFrom<NonZero<usize>> for NonZero<i128>

fn try_from(value: NonZero<usize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<usize> to NonZero<i128>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<usize>> for NonZero<i16>

fn try_from(value: NonZero<usize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<usize> to NonZero<i16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<usize>> for NonZero<i32>

fn try_from(value: NonZero<usize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<usize> to NonZero<i32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<usize>> for NonZero<i64>

fn try_from(value: NonZero<usize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<usize> to NonZero<i64>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<usize>> for NonZero<i8>

fn try_from(value: NonZero<usize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<usize> to NonZero<i8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<usize>> for NonZero<isize>

fn try_from(value: NonZero<usize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<usize> to NonZero<isize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<usize>> for NonZero<u128>

fn try_from(value: NonZero<usize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<usize> to NonZero<u128>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<usize>> for NonZero<u16>

fn try_from(value: NonZero<usize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<usize> to NonZero<u16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<usize>> for NonZero<u32>

fn try_from(value: NonZero<usize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<usize> to NonZero<u32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<usize>> for NonZero<u64>

fn try_from(value: NonZero<usize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<usize> to NonZero<u64>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<NonZero<usize>> for NonZero<u8>

fn try_from(value: NonZero<usize>) -> Result<Self, Self::Error>

Attempts to convert NonZero<usize> to NonZero<u8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<i128> for NonZero<i128>

fn try_from(value: i128) -> Result<Self, Self::Error>

Attempts to convert i128 to NonZero<i128>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<i16> for NonZero<i16>

fn try_from(value: i16) -> Result<Self, Self::Error>

Attempts to convert i16 to NonZero<i16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<i32> for NonZero<i32>

fn try_from(value: i32) -> Result<Self, Self::Error>

Attempts to convert i32 to NonZero<i32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<i64> for NonZero<i64>

fn try_from(value: i64) -> Result<Self, Self::Error>

Attempts to convert i64 to NonZero<i64>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<i8> for NonZero<i8>

fn try_from(value: i8) -> Result<Self, Self::Error>

Attempts to convert i8 to NonZero<i8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<isize> for NonZero<isize>

fn try_from(value: isize) -> Result<Self, Self::Error>

Attempts to convert isize to NonZero<isize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<u128> for NonZero<u128>

fn try_from(value: u128) -> Result<Self, Self::Error>

Attempts to convert u128 to NonZero<u128>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<u16> for NonZero<u16>

fn try_from(value: u16) -> Result<Self, Self::Error>

Attempts to convert u16 to NonZero<u16>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<u32> for NonZero<u32>

fn try_from(value: u32) -> Result<Self, Self::Error>

Attempts to convert u32 to NonZero<u32>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<u64> for NonZero<u64>

fn try_from(value: u64) -> Result<Self, Self::Error>

Attempts to convert u64 to NonZero<u64>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<u8> for NonZero<u8>

fn try_from(value: u8) -> Result<Self, Self::Error>

Attempts to convert u8 to NonZero<u8>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl TryFrom<usize> for NonZero<usize>

fn try_from(value: usize) -> Result<Self, Self::Error>

Attempts to convert usize to NonZero<usize>.

type Error = TryFromIntError

The type returned in the event of a conversion error.

impl<T> UpperExp for NonZero<T>

where T: ZeroablePrimitive + UpperExp,

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

Formats the value using the given formatter.

impl<T> UpperHex for NonZero<T>

where T: ZeroablePrimitive + UpperHex,

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

Formats the value using the given formatter.

impl<T> Copy for NonZero<T>

where T: ZeroablePrimitive,

impl<T> Eq for NonZero<T>

where T: ZeroablePrimitive + Eq,

impl<T> Freeze for NonZero<T>

where T: ZeroablePrimitive + Freeze,

impl<T> RefUnwindSafe for NonZero<T>

where T: ZeroablePrimitive + RefUnwindSafe,

impl<T> Send for NonZero<T>

where T: ZeroablePrimitive + Send,

impl<T> StructuralPartialEq for NonZero<T>

where T: ZeroablePrimitive + StructuralPartialEq,

impl<T> Sync for NonZero<T>

where T: ZeroablePrimitive + Sync,

impl<T> Unpin for NonZero<T>

where T: ZeroablePrimitive + Unpin,

impl<T> UnwindSafe for NonZero<T>

where T: ZeroablePrimitive + UnwindSafe,