Struct std::num::NonZeroI128
1.34.0 · source · #[repr(transparent)]pub struct NonZeroI128(_);
Expand description
已知不等于零的整数。
这样可以进行一些内存布局优化。
For example, Option<NonZeroI128>
is the same size as i128
:
use std::mem::size_of;
assert_eq!(size_of::<Option<core::num::NonZeroI128>>(), size_of::<i128>());
RunLayout
NonZeroI128
is guaranteed to have the same layout and bit validity as i128
除了 0
不是有效实例。
Option<NonZeroI128>
is guaranteed to be compatible with i128
,
包括在 FFI 中。
Implementations§
source§impl NonZeroI128
impl NonZeroI128
const: 1.34.0 · sourcepub const unsafe fn new_unchecked(n: i128) -> NonZeroI128
pub const unsafe fn new_unchecked(n: i128) -> NonZeroI128
const: 1.47.0 · sourcepub const fn new(n: i128) -> Option<NonZeroI128>
pub const fn new(n: i128) -> Option<NonZeroI128>
如果给定值不为零,则创建一个非零值。
source§impl NonZeroI128
impl NonZeroI128
1.53.0 (const: 1.53.0) · sourcepub const fn leading_zeros(self) -> u32
pub const fn leading_zeros(self) -> u32
1.53.0 (const: 1.53.0) · sourcepub const fn trailing_zeros(self) -> u32
pub const fn trailing_zeros(self) -> u32
source§impl NonZeroI128
impl NonZeroI128
1.64.0 (const: 1.64.0) · sourcepub const fn abs(self) -> NonZeroI128
pub const fn abs(self) -> NonZeroI128
1.64.0 (const: 1.64.0) · sourcepub const fn checked_abs(self) -> Option<NonZeroI128>
pub const fn checked_abs(self) -> Option<NonZeroI128>
1.64.0 (const: 1.64.0) · sourcepub const fn overflowing_abs(self) -> (NonZeroI128, bool)
pub const fn overflowing_abs(self) -> (NonZeroI128, bool)
1.64.0 (const: 1.64.0) · sourcepub const fn saturating_abs(self) -> NonZeroI128
pub const fn saturating_abs(self) -> NonZeroI128
饱和绝对值,请参见
i128::saturating_abs
.
Example
let pos = NonZeroI128::new(1)?;
let neg = NonZeroI128::new(-1)?;
let min = NonZeroI128::new(i128::MIN)?;
let min_plus = NonZeroI128::new(i128::MIN + 1)?;
let max = NonZeroI128::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());
Run1.64.0 (const: 1.64.0) · sourcepub const fn wrapping_abs(self) -> NonZeroI128
pub const fn wrapping_abs(self) -> NonZeroI128
包装绝对值,请参见
i128::wrapping_abs
.
Example
let pos = NonZeroI128::new(1)?;
let neg = NonZeroI128::new(-1)?;
let min = NonZeroI128::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());
Run1.64.0 (const: 1.64.0) · sourcepub const fn unsigned_abs(self) -> NonZeroU128
pub const fn unsigned_abs(self) -> NonZeroU128
在没有任何包装或 panicking 的情况下计算 self 的绝对值。
Example
let u_pos = NonZeroU128::new(1)?;
let i_pos = NonZeroI128::new(1)?;
let i_neg = NonZeroI128::new(-1)?;
let i_min = NonZeroI128::new(i128::MIN)?;
let u_max = NonZeroU128::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());
Run1.71.0 (const: 1.71.0) · sourcepub const fn is_positive(self) -> bool
pub const fn is_positive(self) -> bool
1.71.0 (const: 1.71.0) · sourcepub const fn is_negative(self) -> bool
pub const fn is_negative(self) -> bool
1.71.0 (const: 1.71.0) · sourcepub const fn checked_neg(self) -> Option<NonZeroI128>
pub const fn checked_neg(self) -> Option<NonZeroI128>
1.71.0 (const: 1.71.0) · sourcepub const fn overflowing_neg(self) -> (NonZeroI128, bool)
pub const fn overflowing_neg(self) -> (NonZeroI128, bool)
否定 self,如果等于最小值,则溢出。
See i128::overflowing_neg
有关溢出行为的文档。
Example
let pos_five = NonZeroI128::new(5)?;
let neg_five = NonZeroI128::new(-5)?;
let min = NonZeroI128::new(i128::MIN)?;
assert_eq!(pos_five.overflowing_neg(), (neg_five, false));
assert_eq!(min.overflowing_neg(), (min, true));
Run1.71.0 (const: 1.71.0) · sourcepub const fn saturating_neg(self) -> NonZeroI128
pub const fn saturating_neg(self) -> NonZeroI128
饱和否定。计算 -self
,如果 self == i32::MIN
而不是溢出则返回 MAX
。
Example
let pos_five = NonZeroI128::new(5)?;
let neg_five = NonZeroI128::new(-5)?;
let min = NonZeroI128::new(i128::MIN)?;
let min_plus_one = NonZeroI128::new(i128::MIN + 1)?;
let max = NonZeroI128::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);
Run1.71.0 (const: 1.71.0) · sourcepub const fn wrapping_neg(self) -> NonZeroI128
pub const fn wrapping_neg(self) -> NonZeroI128
包装 (modular) 取反。
计算 -self
,在类型的边界处回绕。
See i128::wrapping_neg
有关溢出行为的文档。
Example
let pos_five = NonZeroI128::new(5)?;
let neg_five = NonZeroI128::new(-5)?;
let min = NonZeroI128::new(i128::MIN)?;
assert_eq!(pos_five.wrapping_neg(), neg_five);
assert_eq!(min.wrapping_neg(), min);
Runsource§impl NonZeroI128
impl NonZeroI128
1.64.0 (const: 1.64.0) · sourcepub const fn checked_mul(self, other: NonZeroI128) -> Option<NonZeroI128>
pub const fn checked_mul(self, other: NonZeroI128) -> Option<NonZeroI128>
1.64.0 (const: 1.64.0) · sourcepub const fn saturating_mul(self, other: NonZeroI128) -> NonZeroI128
pub const fn saturating_mul(self, other: NonZeroI128) -> NonZeroI128
sourcepub const unsafe fn unchecked_mul(self, other: NonZeroI128) -> NonZeroI128
🔬This is a nightly-only experimental API. (nonzero_ops
#84186)
pub const unsafe fn unchecked_mul(self, other: NonZeroI128) -> NonZeroI128
nonzero_ops
#84186)1.64.0 (const: 1.64.0) · sourcepub const fn checked_pow(self, other: u32) -> Option<NonZeroI128>
pub const fn checked_pow(self, other: u32) -> Option<NonZeroI128>
1.64.0 (const: 1.64.0) · sourcepub const fn saturating_pow(self, other: u32) -> NonZeroI128
pub const fn saturating_pow(self, other: u32) -> NonZeroI128
source§impl NonZeroI128
impl NonZeroI128
1.70.0 · sourcepub const MIN: NonZeroI128 = Self::new(i128::MIN).unwrap()
pub const MIN: NonZeroI128 = Self::new(i128::MIN).unwrap()
source§impl NonZeroI128
impl NonZeroI128
Trait Implementations§
source§impl Binary for NonZeroI128
impl Binary for NonZeroI128
1.45.0 · source§impl BitOr<NonZeroI128> for NonZeroI128
impl BitOr<NonZeroI128> for NonZeroI128
§type Output = NonZeroI128
type Output = NonZeroI128
|
运算符后的结果类型。source§fn bitor(self, rhs: NonZeroI128) -> <NonZeroI128 as BitOr<NonZeroI128>>::Output
fn bitor(self, rhs: NonZeroI128) -> <NonZeroI128 as BitOr<NonZeroI128>>::Output
|
操作。 Read more1.45.0 · source§impl BitOr<NonZeroI128> for i128
impl BitOr<NonZeroI128> for i128
§type Output = NonZeroI128
type Output = NonZeroI128
|
运算符后的结果类型。source§fn bitor(self, rhs: NonZeroI128) -> <i128 as BitOr<NonZeroI128>>::Output
fn bitor(self, rhs: NonZeroI128) -> <i128 as BitOr<NonZeroI128>>::Output
|
操作。 Read more1.45.0 · source§impl BitOr<i128> for NonZeroI128
impl BitOr<i128> for NonZeroI128
1.45.0 · source§impl BitOrAssign<NonZeroI128> for NonZeroI128
impl BitOrAssign<NonZeroI128> for NonZeroI128
source§fn bitor_assign(&mut self, rhs: NonZeroI128)
fn bitor_assign(&mut self, rhs: NonZeroI128)
|=
操作。 Read more1.45.0 · source§impl BitOrAssign<i128> for NonZeroI128
impl BitOrAssign<i128> for NonZeroI128
source§fn bitor_assign(&mut self, rhs: i128)
fn bitor_assign(&mut self, rhs: i128)
|=
操作。 Read moresource§impl Clone for NonZeroI128
impl Clone for NonZeroI128
source§fn clone(&self) -> NonZeroI128
fn clone(&self) -> NonZeroI128
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
执行复制分配。 Read moresource§impl Debug for NonZeroI128
impl Debug for NonZeroI128
source§impl Display for NonZeroI128
impl Display for NonZeroI128
1.31.0 · source§impl From<NonZeroI128> for i128
impl From<NonZeroI128> for i128
source§fn from(nonzero: NonZeroI128) -> i128
fn from(nonzero: NonZeroI128) -> i128
Converts a NonZeroI128
into an i128
1.41.0 · source§impl From<NonZeroI16> for NonZeroI128
impl From<NonZeroI16> for NonZeroI128
source§fn from(small: NonZeroI16) -> NonZeroI128
fn from(small: NonZeroI16) -> NonZeroI128
Converts NonZeroI16
to NonZeroI128
losslessly.
1.41.0 · source§impl From<NonZeroI32> for NonZeroI128
impl From<NonZeroI32> for NonZeroI128
source§fn from(small: NonZeroI32) -> NonZeroI128
fn from(small: NonZeroI32) -> NonZeroI128
Converts NonZeroI32
to NonZeroI128
losslessly.
1.41.0 · source§impl From<NonZeroI64> for NonZeroI128
impl From<NonZeroI64> for NonZeroI128
source§fn from(small: NonZeroI64) -> NonZeroI128
fn from(small: NonZeroI64) -> NonZeroI128
Converts NonZeroI64
to NonZeroI128
losslessly.
1.41.0 · source§impl From<NonZeroI8> for NonZeroI128
impl From<NonZeroI8> for NonZeroI128
source§fn from(small: NonZeroI8) -> NonZeroI128
fn from(small: NonZeroI8) -> NonZeroI128
Converts NonZeroI8
to NonZeroI128
losslessly.
1.41.0 · source§impl From<NonZeroU16> for NonZeroI128
impl From<NonZeroU16> for NonZeroI128
source§fn from(small: NonZeroU16) -> NonZeroI128
fn from(small: NonZeroU16) -> NonZeroI128
Converts NonZeroU16
to NonZeroI128
losslessly.
1.41.0 · source§impl From<NonZeroU32> for NonZeroI128
impl From<NonZeroU32> for NonZeroI128
source§fn from(small: NonZeroU32) -> NonZeroI128
fn from(small: NonZeroU32) -> NonZeroI128
Converts NonZeroU32
to NonZeroI128
losslessly.
1.41.0 · source§impl From<NonZeroU64> for NonZeroI128
impl From<NonZeroU64> for NonZeroI128
source§fn from(small: NonZeroU64) -> NonZeroI128
fn from(small: NonZeroU64) -> NonZeroI128
Converts NonZeroU64
to NonZeroI128
losslessly.
1.41.0 · source§impl From<NonZeroU8> for NonZeroI128
impl From<NonZeroU8> for NonZeroI128
source§fn from(small: NonZeroU8) -> NonZeroI128
fn from(small: NonZeroU8) -> NonZeroI128
Converts NonZeroU8
to NonZeroI128
losslessly.
1.35.0 · source§impl FromStr for NonZeroI128
impl FromStr for NonZeroI128
§type Err = ParseIntError
type Err = ParseIntError
source§fn from_str(src: &str) -> Result<NonZeroI128, <NonZeroI128 as FromStr>::Err>
fn from_str(src: &str) -> Result<NonZeroI128, <NonZeroI128 as FromStr>::Err>
s
以返回此类型的值。 Read moresource§impl Hash for NonZeroI128
impl Hash for NonZeroI128
source§impl LowerHex for NonZeroI128
impl LowerHex for NonZeroI128
1.71.0 · source§impl Neg for &NonZeroI128
impl Neg for &NonZeroI128
1.71.0 · source§impl Neg for NonZeroI128
impl Neg for NonZeroI128
§type Output = NonZeroI128
type Output = NonZeroI128
-
运算符后的结果类型。source§fn neg(self) -> NonZeroI128
fn neg(self) -> NonZeroI128
-
运算。 Read moresource§impl Octal for NonZeroI128
impl Octal for NonZeroI128
source§impl Ord for NonZeroI128
impl Ord for NonZeroI128
source§impl PartialEq<NonZeroI128> for NonZeroI128
impl PartialEq<NonZeroI128> for NonZeroI128
source§impl PartialOrd<NonZeroI128> for NonZeroI128
impl PartialOrd<NonZeroI128> for NonZeroI128
1.49.0 · source§impl TryFrom<NonZeroI128> for NonZeroI16
impl TryFrom<NonZeroI128> for NonZeroI16
source§fn try_from(
value: NonZeroI128
) -> Result<NonZeroI16, <NonZeroI16 as TryFrom<NonZeroI128>>::Error>
fn try_from( value: NonZeroI128 ) -> Result<NonZeroI16, <NonZeroI16 as TryFrom<NonZeroI128>>::Error>
Attempts to convert NonZeroI128
to NonZeroI16
.
§type Error = TryFromIntError
type Error = TryFromIntError
1.49.0 · source§impl TryFrom<NonZeroI128> for NonZeroI32
impl TryFrom<NonZeroI128> for NonZeroI32
source§fn try_from(
value: NonZeroI128
) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroI128>>::Error>
fn try_from( value: NonZeroI128 ) -> Result<NonZeroI32, <NonZeroI32 as TryFrom<NonZeroI128>>::Error>
Attempts to convert NonZeroI128
to NonZeroI32
.
§type Error = TryFromIntError
type Error = TryFromIntError
1.49.0 · source§impl TryFrom<NonZeroI128> for NonZeroI64
impl TryFrom<NonZeroI128> for NonZeroI64
source§fn try_from(
value: NonZeroI128
) -> Result<NonZeroI64, <NonZeroI64 as TryFrom<NonZeroI128>>::Error>
fn try_from( value: NonZeroI128 ) -> Result<NonZeroI64, <NonZeroI64 as TryFrom<NonZeroI128>>::Error>
Attempts to convert NonZeroI128
to NonZeroI64
.
§type Error = TryFromIntError
type Error = TryFromIntError
1.49.0 · source§impl TryFrom<NonZeroI128> for NonZeroI8
impl TryFrom<NonZeroI128> for NonZeroI8
source§fn try_from(
value: NonZeroI128
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroI128>>::Error>
fn try_from( value: NonZeroI128 ) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroI128>>::Error>
Attempts to convert NonZeroI128
to NonZeroI8
.
§type Error = TryFromIntError
type Error = TryFromIntError
1.49.0 · source§impl TryFrom<NonZeroI128> for NonZeroIsize
impl TryFrom<NonZeroI128> for NonZeroIsize
source§fn try_from(
value: NonZeroI128
) -> Result<NonZeroIsize, <NonZeroIsize as TryFrom<NonZeroI128>>::Error>
fn try_from( value: NonZeroI128 ) -> Result<NonZeroIsize, <NonZeroIsize as TryFrom<NonZeroI128>>::Error>
Attempts to convert NonZeroI128
to NonZeroIsize
.
§type Error = TryFromIntError
type Error = TryFromIntError
1.49.0 · source§impl TryFrom<NonZeroI128> for NonZeroU128
impl TryFrom<NonZeroI128> for NonZeroU128
source§fn try_from(
value: NonZeroI128
) -> Result<NonZeroU128, <NonZeroU128 as TryFrom<NonZeroI128>>::Error>
fn try_from( value: NonZeroI128 ) -> Result<NonZeroU128, <NonZeroU128 as TryFrom<NonZeroI128>>::Error>
Attempts to convert NonZeroI128
to NonZeroU128
.
§type Error = TryFromIntError
type Error = TryFromIntError
1.49.0 · source§impl TryFrom<NonZeroI128> for NonZeroU16
impl TryFrom<NonZeroI128> for NonZeroU16
source§fn try_from(
value: NonZeroI128
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroI128>>::Error>
fn try_from( value: NonZeroI128 ) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroI128>>::Error>
Attempts to convert NonZeroI128
to NonZeroU16
.
§type Error = TryFromIntError
type Error = TryFromIntError
1.49.0 · source§impl TryFrom<NonZeroI128> for NonZeroU32
impl TryFrom<NonZeroI128> for NonZeroU32
source§fn try_from(
value: NonZeroI128
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroI128>>::Error>
fn try_from( value: NonZeroI128 ) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroI128>>::Error>
Attempts to convert NonZeroI128
to NonZeroU32
.
§type Error = TryFromIntError
type Error = TryFromIntError
1.49.0 · source§impl TryFrom<NonZeroI128> for NonZeroU64
impl TryFrom<NonZeroI128> for NonZeroU64
source§fn try_from(
value: NonZeroI128
) -> Result<NonZeroU64, <NonZeroU64 as TryFrom<NonZeroI128>>::Error>
fn try_from( value: NonZeroI128 ) -> Result<NonZeroU64, <NonZeroU64 as TryFrom<NonZeroI128>>::Error>
Attempts to convert NonZeroI128
to NonZeroU64
.
§type Error = TryFromIntError
type Error = TryFromIntError
1.49.0 · source§impl TryFrom<NonZeroI128> for NonZeroU8
impl TryFrom<NonZeroI128> for NonZeroU8
source§fn try_from(
value: NonZeroI128
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI128>>::Error>
fn try_from( value: NonZeroI128 ) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI128>>::Error>
Attempts to convert NonZeroI128
to NonZeroU8
.
§type Error = TryFromIntError
type Error = TryFromIntError
1.49.0 · source§impl TryFrom<NonZeroI128> for NonZeroUsize
impl TryFrom<NonZeroI128> for NonZeroUsize
source§fn try_from(
value: NonZeroI128
) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<NonZeroI128>>::Error>
fn try_from( value: NonZeroI128 ) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<NonZeroI128>>::Error>
Attempts to convert NonZeroI128
to NonZeroUsize
.
§type Error = TryFromIntError
type Error = TryFromIntError
1.49.0 · source§impl TryFrom<NonZeroIsize> for NonZeroI128
impl TryFrom<NonZeroIsize> for NonZeroI128
source§fn try_from(
value: NonZeroIsize
) -> Result<NonZeroI128, <NonZeroI128 as TryFrom<NonZeroIsize>>::Error>
fn try_from( value: NonZeroIsize ) -> Result<NonZeroI128, <NonZeroI128 as TryFrom<NonZeroIsize>>::Error>
Attempts to convert NonZeroIsize
to NonZeroI128
.
§type Error = TryFromIntError
type Error = TryFromIntError
1.49.0 · source§impl TryFrom<NonZeroU128> for NonZeroI128
impl TryFrom<NonZeroU128> for NonZeroI128
source§fn try_from(
value: NonZeroU128
) -> Result<NonZeroI128, <NonZeroI128 as TryFrom<NonZeroU128>>::Error>
fn try_from( value: NonZeroU128 ) -> Result<NonZeroI128, <NonZeroI128 as TryFrom<NonZeroU128>>::Error>
Attempts to convert NonZeroU128
to NonZeroI128
.
§type Error = TryFromIntError
type Error = TryFromIntError
1.49.0 · source§impl TryFrom<NonZeroUsize> for NonZeroI128
impl TryFrom<NonZeroUsize> for NonZeroI128
source§fn try_from(
value: NonZeroUsize
) -> Result<NonZeroI128, <NonZeroI128 as TryFrom<NonZeroUsize>>::Error>
fn try_from( value: NonZeroUsize ) -> Result<NonZeroI128, <NonZeroI128 as TryFrom<NonZeroUsize>>::Error>
Attempts to convert NonZeroUsize
to NonZeroI128
.
§type Error = TryFromIntError
type Error = TryFromIntError
1.46.0 · source§impl TryFrom<i128> for NonZeroI128
impl TryFrom<i128> for NonZeroI128
source§fn try_from(
value: i128
) -> Result<NonZeroI128, <NonZeroI128 as TryFrom<i128>>::Error>
fn try_from( value: i128 ) -> Result<NonZeroI128, <NonZeroI128 as TryFrom<i128>>::Error>
Attempts to convert i128
to NonZeroI128
.