# Struct std::num::NonZeroI32

1.34.0 · source ·

    pub struct NonZeroI32(/* private fields */);

Expand description

An integer that is known not to equal zero.

This enables some memory layout optimization. For example, `Option<NonZeroI32>` is the same size as `i32`:

    use std::mem::size_of;
    assert_eq!(size_of::<Option<core::num::NonZeroI32>>(), size_of::<i32>());

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## Layout

`NonZeroI32` is guaranteed to have the same layout and bit validity as `i32` with the exception that `0` is not a valid instance. `Option<NonZeroI32>` is guaranteed to be compatible with `i32`, including in FFI.

Thanks to the null pointer optimization, `NonZeroI32` and `Option<NonZeroI32>` are guaranteed to have the same size and alignment:

    use std::num::NonZeroI32;

    assert_eq!(size_of::<NonZeroI32>(), size_of::<Option<NonZeroI32>>());
    assert_eq!(align_of::<NonZeroI32>(), align_of::<Option<NonZeroI32>>());

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## Implementations§

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### impl NonZeroI32

const: 1.34.0 · source

#### pub const unsafe fn new_unchecked(n: i32) -> NonZeroI32

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

##### Safety

The value must not be zero.

const: 1.47.0 · source

#### pub const fn new(n: i32) -> Option<NonZeroI32>

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

const: 1.34.0 · source

#### pub const fn get(self) -> i32

Returns the value as a primitive type.

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### impl NonZeroI32

1.53.0 (const: 1.53.0) · source

#### 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 = std::num::NonZeroI32::new(-1i32).unwrap();

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

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1.53.0 (const: 1.53.0) · source

#### 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 = std::num::NonZeroI32::new(0b0101000).unwrap();

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

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### impl NonZeroI32

1.64.0 (const: 1.64.0) · source

#### pub const fn abs(self) -> NonZeroI32

Computes the absolute value of self. See `i32::abs` for documentation on overflow behaviour.

##### Example

    let pos = NonZeroI32::new(1)?;
    let neg = NonZeroI32::new(-1)?;

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

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1.64.0 (const: 1.64.0) · source

#### pub const fn checked_abs(self) -> Option<NonZeroI32>

Checked absolute value. Checks for overflow and returns `None` if `self == NonZeroI32::MIN`. The result cannot be zero.

##### Example

    let pos = NonZeroI32::new(1)?;
    let neg = NonZeroI32::new(-1)?;
    let min = NonZeroI32::new(i32::MIN)?;

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

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1.64.0 (const: 1.64.0) · source

#### pub const fn overflowing_abs(self) -> (NonZeroI32, bool)

Computes the absolute value of self, with overflow information, see `i32::overflowing_abs`.

##### Example

    let pos = NonZeroI32::new(1)?;
    let neg = NonZeroI32::new(-1)?;
    let min = NonZeroI32::new(i32::MIN)?;

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

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1.64.0 (const: 1.64.0) · source

#### pub const fn saturating_abs(self) -> NonZeroI32

Saturating absolute value, see `i32::saturating_abs`.

##### Example

    let pos = NonZeroI32::new(1)?;
    let neg = NonZeroI32::new(-1)?;
    let min = NonZeroI32::new(i32::MIN)?;
    let min_plus = NonZeroI32::new(i32::MIN + 1)?;
    let max = NonZeroI32::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());

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1.64.0 (const: 1.64.0) · source

#### pub const fn wrapping_abs(self) -> NonZeroI32

Wrapping absolute value, see `i32::wrapping_abs`.

##### Example

    let pos = NonZeroI32::new(1)?;
    let neg = NonZeroI32::new(-1)?;
    let min = NonZeroI32::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());

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1.64.0 (const: 1.64.0) · source

#### pub const fn unsigned_abs(self) -> NonZeroU32

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

##### Example

    let u_pos = NonZeroU32::new(1)?;
    let i_pos = NonZeroI32::new(1)?;
    let i_neg = NonZeroI32::new(-1)?;
    let i_min = NonZeroI32::new(i32::MIN)?;
    let u_max = NonZeroU32::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());

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1.71.0 (const: 1.71.0) · source

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

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

##### Example

    let pos_five = NonZeroI32::new(5)?;
    let neg_five = NonZeroI32::new(-5)?;

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

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1.71.0 (const: 1.71.0) · source

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

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

##### Example

    let pos_five = NonZeroI32::new(5)?;
    let neg_five = NonZeroI32::new(-5)?;

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

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1.71.0 (const: 1.71.0) · source

#### pub const fn checked_neg(self) -> Option<NonZeroI32>

Checked negation. Computes `-self`, returning `None` if `self == NonZeroI32::MIN`.

##### Example

    let pos_five = NonZeroI32::new(5)?;
    let neg_five = NonZeroI32::new(-5)?;
    let min = NonZeroI32::new(i32::MIN)?;

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

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1.71.0 (const: 1.71.0) · source

#### pub const fn overflowing_neg(self) -> (NonZeroI32, bool)

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

See `i32::overflowing_neg` for documentation on overflow behaviour.

##### Example

    let pos_five = NonZeroI32::new(5)?;
    let neg_five = NonZeroI32::new(-5)?;
    let min = NonZeroI32::new(i32::MIN)?;

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

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1.71.0 (const: 1.71.0) · source

#### pub const fn saturating_neg(self) -> NonZeroI32

Saturating negation. Computes `-self`, returning `NonZeroI32::MAX` if `self == NonZeroI32::MIN` instead of overflowing.

##### Example

    let pos_five = NonZeroI32::new(5)?;
    let neg_five = NonZeroI32::new(-5)?;
    let min = NonZeroI32::new(i32::MIN)?;
    let min_plus_one = NonZeroI32::new(i32::MIN + 1)?;
    let max = NonZeroI32::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);

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1.71.0 (const: 1.71.0) · source

#### pub const fn wrapping_neg(self) -> NonZeroI32

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

See `i32::wrapping_neg` for documentation on overflow behaviour.

##### Example

    let pos_five = NonZeroI32::new(5)?;
    let neg_five = NonZeroI32::new(-5)?;
    let min = NonZeroI32::new(i32::MIN)?;

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

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### impl NonZeroI32

1.64.0 (const: 1.64.0) · source

#### pub const fn checked_mul(self, other: NonZeroI32) -> Option<NonZeroI32>

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 = NonZeroI32::new(2)?;
    let four = NonZeroI32::new(4)?;
    let max = NonZeroI32::new(i32::MAX)?;

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

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1.64.0 (const: 1.64.0) · source

#### pub const fn saturating_mul(self, other: NonZeroI32) -> NonZeroI32

Multiplies two non-zero integers together. Return `NonZeroI32::MAX` on overflow.

##### Examples

    let two = NonZeroI32::new(2)?;
    let four = NonZeroI32::new(4)?;
    let max = NonZeroI32::new(i32::MAX)?;

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

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source

#### pub const unsafe fn unchecked_mul(self, other: NonZeroI32) -> NonZeroI32

🔬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 behaviour to overflow even if the result would wrap to a non-zero value. The behaviour is undefined as soon as `self * rhs > i32::MAX`, or `self * rhs < i32::MIN`.

##### Examples

    #![feature(nonzero_ops)]

    let two = NonZeroI32::new(2)?;
    let four = NonZeroI32::new(4)?;

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

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1.64.0 (const: 1.64.0) · source

#### pub const fn checked_pow(self, other: u32) -> Option<NonZeroI32>

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 = NonZeroI32::new(3)?;
    let twenty_seven = NonZeroI32::new(27)?;
    let half_max = NonZeroI32::new(i32::MAX / 2)?;

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

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1.64.0 (const: 1.64.0) · source

#### pub const fn saturating_pow(self, other: u32) -> NonZeroI32

Raise non-zero value to an integer power. Return `NonZeroI32::MIN` or `NonZeroI32::MAX` on overflow.

##### Examples

    let three = NonZeroI32::new(3)?;
    let twenty_seven = NonZeroI32::new(27)?;
    let max = NonZeroI32::new(i32::MAX)?;

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

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source§

### impl NonZeroI32

1.70.0 · source

#### pub const MIN: NonZeroI32 = _

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!(NonZeroI32::MIN.get(), i32::MIN);

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1.70.0 · source

#### pub const MAX: NonZeroI32 = _

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!(NonZeroI32::MAX.get(), i32::MAX);

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### impl NonZeroI32

1.67.0 · source

#### 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!(NonZeroI32::BITS, i32::BITS);

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## Trait Implementations§

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### impl Binary for NonZeroI32

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

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

### impl BitOr<NonZeroI32> for i32

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#### type Output = NonZeroI32

The resulting type after applying the `|` operator.
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#### fn bitor(self, rhs: NonZeroI32) -> <i32 as BitOr<NonZeroI32>>::Output

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

### impl BitOr<i32> for NonZeroI32

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#### type Output = NonZeroI32

The resulting type after applying the `|` operator.
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#### fn bitor(self, rhs: i32) -> <NonZeroI32 as BitOr<i32>>::Output

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

### impl BitOr for NonZeroI32

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#### type Output = NonZeroI32

The resulting type after applying the `|` operator.
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#### fn bitor(self, rhs: NonZeroI32) -> <NonZeroI32 as BitOr>::Output

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

### impl BitOrAssign<i32> for NonZeroI32

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#### fn bitor_assign(&mut self, rhs: i32)

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

### impl BitOrAssign for NonZeroI32

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#### fn bitor_assign(&mut self, rhs: NonZeroI32)

Performs the `|=` operation. Read more
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### impl Clone for NonZeroI32

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#### fn clone(&self) -> NonZeroI32

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

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

Performs copy-assignment from `source`. Read more
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### impl Debug for NonZeroI32

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

Formats the value using the given formatter. Read more
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### impl Display for NonZeroI32

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

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

### impl From<NonZeroI16> for NonZeroI32

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#### fn from(small: NonZeroI16) -> NonZeroI32

Converts `NonZeroI16` to `NonZeroI32` losslessly.

1.41.0 · source§

### impl From<NonZeroI32> for NonZeroI128

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#### fn from(small: NonZeroI32) -> NonZeroI128

Converts `NonZeroI32` to `NonZeroI128` losslessly.

1.41.0 · source§

### impl From<NonZeroI32> for NonZeroI64

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#### fn from(small: NonZeroI32) -> NonZeroI64

Converts `NonZeroI32` to `NonZeroI64` losslessly.

1.31.0 · source§

### impl From<NonZeroI32> for i32

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#### fn from(nonzero: NonZeroI32) -> i32

Converts a `NonZeroI32` into an `i32`

1.41.0 · source§

### impl From<NonZeroI8> for NonZeroI32

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#### fn from(small: NonZeroI8) -> NonZeroI32

Converts `NonZeroI8` to `NonZeroI32` losslessly.

1.41.0 · source§

### impl From<NonZeroU16> for NonZeroI32

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#### fn from(small: NonZeroU16) -> NonZeroI32

Converts `NonZeroU16` to `NonZeroI32` losslessly.

1.41.0 · source§

### impl From<NonZeroU8> for NonZeroI32

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#### fn from(small: NonZeroU8) -> NonZeroI32

Converts `NonZeroU8` to `NonZeroI32` losslessly.

1.35.0 · source§

### impl FromStr for NonZeroI32

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#### type Err = ParseIntError

The associated error which can be returned from parsing.
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#### fn from_str(src: &str) -> Result<NonZeroI32, <NonZeroI32 as FromStr>::Err>

Parses a string `s` to return a value of this type. Read more
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### impl Hash for NonZeroI32

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

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

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

Feeds a slice of this type into the given `Hasher`. Read more
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### impl LowerHex for NonZeroI32

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

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

### impl Neg for &NonZeroI32

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#### type Output = <NonZeroI32 as Neg>::Output

The resulting type after applying the `-` operator.
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#### fn neg(self) -> <NonZeroI32 as Neg>::Output

Performs the unary `-` operation. Read more
1.71.0 · source§

### impl Neg for NonZeroI32

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#### type Output = NonZeroI32

The resulting type after applying the `-` operator.
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#### fn neg(self) -> NonZeroI32

Performs the unary `-` operation. Read more
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### impl Octal for NonZeroI32

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

Formats the value using the given formatter.
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### impl Ord for NonZeroI32

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#### fn cmp(&self, other: &NonZeroI32) -> Ordering

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

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

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

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

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

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

Restrict a value to a certain interval. Read more
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### impl PartialEq for NonZeroI32

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#### fn eq(&self, other: &NonZeroI32) -> bool

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

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

This method tests for `!=`. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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### impl PartialOrd for NonZeroI32

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#### fn partial_cmp(&self, other: &NonZeroI32) -> Option<Ordering>

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

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

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

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

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

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

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

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

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

### impl TryFrom<NonZeroI128> for NonZeroI32

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#### fn try_from( value: NonZeroI128 ) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroI128>>::Error>

Attempts to convert `NonZeroI128` to `NonZeroI32`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.49.0 · source§

### impl TryFrom<NonZeroI32> for NonZeroI16

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#### fn try_from( value: NonZeroI32 ) -> Result<NonZeroI16, <NonZeroI16 as TryFrom<NonZeroI32>>::Error>

Attempts to convert `NonZeroI32` to `NonZeroI16`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.49.0 · source§

### impl TryFrom<NonZeroI32> for NonZeroI8

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#### fn try_from( value: NonZeroI32 ) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroI32>>::Error>

Attempts to convert `NonZeroI32` to `NonZeroI8`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.49.0 · source§

### impl TryFrom<NonZeroI32> for NonZeroIsize

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#### fn try_from( value: NonZeroI32 ) -> Result<NonZeroIsize, <NonZeroIsize as TryFrom<NonZeroI32>>::Error>

Attempts to convert `NonZeroI32` to `NonZeroIsize`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.49.0 · source§

### impl TryFrom<NonZeroI32> for NonZeroU128

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#### fn try_from( value: NonZeroI32 ) -> Result<NonZeroU128, <NonZeroU128 as TryFrom<NonZeroI32>>::Error>

Attempts to convert `NonZeroI32` to `NonZeroU128`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.49.0 · source§

### impl TryFrom<NonZeroI32> for NonZeroU16

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#### fn try_from( value: NonZeroI32 ) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroI32>>::Error>

Attempts to convert `NonZeroI32` to `NonZeroU16`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.49.0 · source§

### impl TryFrom<NonZeroI32> for NonZeroU32

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#### fn try_from( value: NonZeroI32 ) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroI32>>::Error>

Attempts to convert `NonZeroI32` to `NonZeroU32`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.49.0 · source§

### impl TryFrom<NonZeroI32> for NonZeroU64

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#### fn try_from( value: NonZeroI32 ) -> Result<NonZeroU64, <NonZeroU64 as TryFrom<NonZeroI32>>::Error>

Attempts to convert `NonZeroI32` to `NonZeroU64`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.49.0 · source§

### impl TryFrom<NonZeroI32> for NonZeroU8

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#### fn try_from( value: NonZeroI32 ) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI32>>::Error>

Attempts to convert `NonZeroI32` to `NonZeroU8`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.49.0 · source§

### impl TryFrom<NonZeroI32> for NonZeroUsize

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#### fn try_from( value: NonZeroI32 ) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<NonZeroI32>>::Error>

Attempts to convert `NonZeroI32` to `NonZeroUsize`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.49.0 · source§

### impl TryFrom<NonZeroI64> for NonZeroI32

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#### fn try_from( value: NonZeroI64 ) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroI64>>::Error>

Attempts to convert `NonZeroI64` to `NonZeroI32`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.49.0 · source§

### impl TryFrom<NonZeroIsize> for NonZeroI32

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#### fn try_from( value: NonZeroIsize ) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroIsize>>::Error>

Attempts to convert `NonZeroIsize` to `NonZeroI32`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.49.0 · source§

### impl TryFrom<NonZeroU128> for NonZeroI32

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#### fn try_from( value: NonZeroU128 ) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroU128>>::Error>

Attempts to convert `NonZeroU128` to `NonZeroI32`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.49.0 · source§

### impl TryFrom<NonZeroU32> for NonZeroI32

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#### fn try_from( value: NonZeroU32 ) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroU32>>::Error>

Attempts to convert `NonZeroU32` to `NonZeroI32`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.49.0 · source§

### impl TryFrom<NonZeroU64> for NonZeroI32

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#### fn try_from( value: NonZeroU64 ) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroU64>>::Error>

Attempts to convert `NonZeroU64` to `NonZeroI32`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
1.49.0 · source§

### impl TryFrom<NonZeroUsize> for NonZeroI32

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#### fn try_from( value: NonZeroUsize ) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroUsize>>::Error>

Attempts to convert `NonZeroUsize` to `NonZeroI32`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
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### impl TryFrom<i32> for NonZeroI32

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#### fn try_from( value: i32 ) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<i32>>::Error>

Attempts to convert `i32` to `NonZeroI32`.

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#### type Error = TryFromIntError

The type returned in the event of a conversion error.
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### impl UpperHex for NonZeroI32

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

Formats the value using the given formatter.
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### impl Copy for NonZeroI32

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### impl Eq for NonZeroI32

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### impl StructuralEq for NonZeroI32

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### impl StructuralPartialEq for NonZeroI32

## Auto Trait Implementations§

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### impl RefUnwindSafe for NonZeroI32

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### impl Send for NonZeroI32

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### impl Sync for NonZeroI32

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### impl Unpin for NonZeroI32

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### impl UnwindSafe for NonZeroI32

## Blanket Implementations§

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### impl<T> Any for Twhere T: 'static + ?Sized,

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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### impl<T> Borrow<T> for Twhere T: ?Sized,

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#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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### impl<T> BorrowMut<T> for Twhere T: ?Sized,

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#### fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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### impl<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T, U> Into<U> for Twhere U: From<T>,

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#### fn into(self) -> U

Calls `U::from(self)`.

That is, this conversion is whatever the implementation of `From<T> for U` chooses to do.

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### impl<T> ToOwned for Twhere T: Clone,

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#### type Owned = T

The resulting type after obtaining ownership.
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#### fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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#### fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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### impl<T> ToString for Twhere T: Display + ?Sized,

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#### default fn to_string(&self) -> String

Converts the given value to a `String`. Read more
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### impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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### impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.