Struct std::num::NonZeroI8 1.34.0[−][src]
#[repr(transparent)]pub struct NonZeroI8(_);
Expand description
An integer that is known not to equal zero.
This enables some memory layout optimization.
For example, Option<NonZeroI8>
is the same size as i8
:
use std::mem::size_of; assert_eq!(size_of::<Option<core::num::NonZeroI8>>(), size_of::<i8>());Run
Implementations
Creates a non-zero if the given value is not zero.
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::NonZeroI8::new(-1i8).unwrap(); assert_eq!(n.leading_zeros(), 0);Run
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::NonZeroI8::new(0b0101000).unwrap(); assert_eq!(n.trailing_zeros(), 3);Run
Trait Implementations
Performs the |=
operation. Read more
Performs the |=
operation. Read more
Converts NonZeroI8
to NonZeroI32
losslessly.
Converts NonZeroI8
to NonZeroI64
losslessly.
Converts NonZeroI8
to NonZeroI128
losslessly.
Converts NonZeroI8
to NonZeroI16
losslessly.
Converts NonZeroI8
to NonZeroIsize
losslessly.
This method returns an ordering between self
and other
values if one exists. Read more
This method tests less than (for self
and other
) and is used by the <
operator. Read more
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
This method tests greater than (for self
and other
) and is used by the >
operator. Read more
pub fn try_from(
value: NonZeroI128
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroI128>>::Error>
[src]
pub fn try_from(
value: NonZeroI128
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroI128>>::Error>
[src]Attempts to convert NonZeroI128
to NonZeroI8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroI16
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroI16>>::Error>
[src]
pub fn try_from(
value: NonZeroI16
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroI16>>::Error>
[src]Attempts to convert NonZeroI16
to NonZeroI8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroI32
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroI32>>::Error>
[src]
pub fn try_from(
value: NonZeroI32
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroI32>>::Error>
[src]Attempts to convert NonZeroI32
to NonZeroI8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroI64
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroI64>>::Error>
[src]
pub fn try_from(
value: NonZeroI64
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroI64>>::Error>
[src]Attempts to convert NonZeroI64
to NonZeroI8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroI8
) -> Result<NonZeroU64, <NonZeroU64 as TryFrom<NonZeroI8>>::Error>
[src]
pub fn try_from(
value: NonZeroI8
) -> Result<NonZeroU64, <NonZeroU64 as TryFrom<NonZeroI8>>::Error>
[src]Attempts to convert NonZeroI8
to NonZeroU64
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroI8
) -> Result<NonZeroU128, <NonZeroU128 as TryFrom<NonZeroI8>>::Error>
[src]
pub fn try_from(
value: NonZeroI8
) -> Result<NonZeroU128, <NonZeroU128 as TryFrom<NonZeroI8>>::Error>
[src]Attempts to convert NonZeroI8
to NonZeroU128
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroI8
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroI8>>::Error>
[src]
pub fn try_from(
value: NonZeroI8
) -> Result<NonZeroU32, <NonZeroU32 as TryFrom<NonZeroI8>>::Error>
[src]Attempts to convert NonZeroI8
to NonZeroU32
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroI8
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroI8>>::Error>
[src]
pub fn try_from(
value: NonZeroI8
) -> Result<NonZeroU16, <NonZeroU16 as TryFrom<NonZeroI8>>::Error>
[src]Attempts to convert NonZeroI8
to NonZeroU16
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroI8
) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<NonZeroI8>>::Error>
[src]
pub fn try_from(
value: NonZeroI8
) -> Result<NonZeroUsize, <NonZeroUsize as TryFrom<NonZeroI8>>::Error>
[src]Attempts to convert NonZeroI8
to NonZeroUsize
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroIsize
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroIsize>>::Error>
[src]
pub fn try_from(
value: NonZeroIsize
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroIsize>>::Error>
[src]Attempts to convert NonZeroIsize
to NonZeroI8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroU128
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroU128>>::Error>
[src]
pub fn try_from(
value: NonZeroU128
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroU128>>::Error>
[src]Attempts to convert NonZeroU128
to NonZeroI8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroU16
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroU16>>::Error>
[src]
pub fn try_from(
value: NonZeroU16
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroU16>>::Error>
[src]Attempts to convert NonZeroU16
to NonZeroI8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroU32
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroU32>>::Error>
[src]
pub fn try_from(
value: NonZeroU32
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroU32>>::Error>
[src]Attempts to convert NonZeroU32
to NonZeroI8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroU64
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroU64>>::Error>
[src]
pub fn try_from(
value: NonZeroU64
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroU64>>::Error>
[src]Attempts to convert NonZeroU64
to NonZeroI8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroUsize
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroUsize>>::Error>
[src]
pub fn try_from(
value: NonZeroUsize
) -> Result<NonZeroI8, <NonZeroI8 as TryFrom<NonZeroUsize>>::Error>
[src]Attempts to convert NonZeroUsize
to NonZeroI8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
Auto Trait Implementations
impl RefUnwindSafe for NonZeroI8
impl UnwindSafe for NonZeroI8
Blanket Implementations
Mutably borrows from an owned value. Read more