Struct core::num::NonZeroI64 1.34.0[−][src]
#[repr(transparent)]pub struct NonZeroI64(_);
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<NonZeroI64>
is the same size as i64
:
use std::mem::size_of; assert_eq!(size_of::<Option<core::num::NonZeroI64>>(), size_of::<i64>());Run
Implementations
计算 self 的绝对值,带有溢出信息,请参见
Example
#![feature(nonzero_ops)] let pos = NonZeroI64::new(1)?; let neg = NonZeroI64::new(-1)?; let min = NonZeroI64::new(i64::MIN)?; assert_eq!((pos, false), pos.overflowing_abs()); assert_eq!((pos, false), neg.overflowing_abs()); assert_eq!((min, true), min.overflowing_abs());Run
饱和绝对值,请参见
i64::saturating_abs
.
Example
#![feature(nonzero_ops)] let pos = NonZeroI64::new(1)?; let neg = NonZeroI64::new(-1)?; let min = NonZeroI64::new(i64::MIN)?; let min_plus = NonZeroI64::new(i64::MIN + 1)?; let max = NonZeroI64::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());Run
包装绝对值,请参见
i64::wrapping_abs
.
Example
#![feature(nonzero_ops)] let pos = NonZeroI64::new(1)?; let neg = NonZeroI64::new(-1)?; let min = NonZeroI64::new(i64::MIN)?; let max = NonZeroI64::new(i64::MAX)?; assert_eq!(pos, pos.wrapping_abs()); assert_eq!(pos, neg.wrapping_abs()); assert_eq!(min, min.wrapping_abs());Run
在没有任何包装或 panicking 的情况下计算 self 的绝对值。
Example
#![feature(nonzero_ops)] let u_pos = NonZeroU64::new(1)?; let i_pos = NonZeroI64::new(1)?; let i_neg = NonZeroI64::new(-1)?; let i_min = NonZeroI64::new(i64::MIN)?; let u_max = NonZeroU64::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());Run
Trait Implementations
type Output = NonZeroI64
type Output = NonZeroI64
应用 |
运算符后的结果类型。
执行 |
操作。 Read more
执行 |=
操作。 Read more
执行 |=
操作。 Read more
Converts NonZeroI16
to NonZeroI64
losslessly.
Converts NonZeroI32
to NonZeroI64
losslessly.
Converts a NonZeroI64
into an i64
Converts NonZeroI64
to NonZeroI128
losslessly.
Converts NonZeroU16
to NonZeroI64
losslessly.
Converts NonZeroU32
to NonZeroI64
losslessly.
此方法测试 self
和 other
值是否相等,并由 ==
使用。 Read more
此方法测试 !=
。
Attempts to convert NonZeroI128
to NonZeroI64
.
type Error = TryFromIntError
type Error = TryFromIntError
发生转换错误时返回的类型。
Attempts to convert NonZeroI64
to NonZeroU8
.
type Error = TryFromIntError
type Error = TryFromIntError
发生转换错误时返回的类型。
Attempts to convert NonZeroI64
to NonZeroU16
.
type Error = TryFromIntError
type Error = TryFromIntError
发生转换错误时返回的类型。
Attempts to convert NonZeroI64
to NonZeroU32
.
type Error = TryFromIntError
type Error = TryFromIntError
发生转换错误时返回的类型。
Attempts to convert NonZeroI64
to NonZeroU64
.
type Error = TryFromIntError
type Error = TryFromIntError
发生转换错误时返回的类型。
Attempts to convert NonZeroI64
to NonZeroU128
.
type Error = TryFromIntError
type Error = TryFromIntError
发生转换错误时返回的类型。
Attempts to convert NonZeroI64
to NonZeroUsize
.
type Error = TryFromIntError
type Error = TryFromIntError
发生转换错误时返回的类型。
Attempts to convert NonZeroI64
to NonZeroI8
.
type Error = TryFromIntError
type Error = TryFromIntError
发生转换错误时返回的类型。
Attempts to convert NonZeroI64
to NonZeroI16
.
type Error = TryFromIntError
type Error = TryFromIntError
发生转换错误时返回的类型。
Attempts to convert NonZeroI64
to NonZeroI32
.
type Error = TryFromIntError
type Error = TryFromIntError
发生转换错误时返回的类型。
Attempts to convert NonZeroI64
to NonZeroIsize
.
type Error = TryFromIntError
type Error = TryFromIntError
发生转换错误时返回的类型。
Attempts to convert NonZeroIsize
to NonZeroI64
.
type Error = TryFromIntError
type Error = TryFromIntError
发生转换错误时返回的类型。
Attempts to convert NonZeroU128
to NonZeroI64
.
type Error = TryFromIntError
type Error = TryFromIntError
发生转换错误时返回的类型。
Attempts to convert NonZeroU64
to NonZeroI64
.
type Error = TryFromIntError
type Error = TryFromIntError
发生转换错误时返回的类型。
Attempts to convert NonZeroUsize
to NonZeroI64
.
type Error = TryFromIntError
type Error = TryFromIntError
发生转换错误时返回的类型。