Struct otter_api_tests::imports::failure::_core::num::NonZeroU8 1.28.0[−][src]
#[repr(transparent)]pub struct NonZeroU8(_);
Expand description
An integer that is known not to equal zero.
This enables some memory layout optimization.
For example, Option<NonZeroU8>
is the same size as u8
:
use std::mem::size_of; assert_eq!(size_of::<Option<core::num::NonZeroU8>>(), size_of::<u8>());
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::NonZeroU8::new(u8::MAX).unwrap(); assert_eq!(n.leading_zeros(), 0);
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::NonZeroU8::new(0b0101000).unwrap(); assert_eq!(n.trailing_zeros(), 3);
🔬 This is a nightly-only experimental API. (nonzero_is_power_of_two
)
nonzero_is_power_of_two
)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:
#![feature(nonzero_is_power_of_two)] let eight = std::num::NonZeroU8::new(8).unwrap(); assert!(eight.is_power_of_two()); let ten = std::num::NonZeroU8::new(10).unwrap(); assert!(!ten.is_power_of_two());
Trait Implementations
Performs the |=
operation. Read more
Performs the |=
operation. Read more
impl Contiguous for NonZeroU8
impl Contiguous for NonZeroU8
fn from_integer(value: Self::Int) -> Option<Self>
fn from_integer(value: Self::Int) -> Option<Self>
If value
is within the range for valid instances of this type,
returns Some(converted_value)
, otherwise, returns None
. Read more
fn into_integer(self) -> Self::Int
fn into_integer(self) -> Self::Int
Perform the conversion from C
into the underlying integral type. This
mostly exists otherwise generic code would need unsafe for the value as integer
Read more
pub fn deserialize<D>(
deserializer: D
) -> Result<NonZeroU8, <D as Deserializer<'de>>::Error> where
D: Deserializer<'de>,
[src]
pub fn deserialize<D>(
deserializer: D
) -> Result<NonZeroU8, <D as Deserializer<'de>>::Error> where
D: Deserializer<'de>,
[src]Deserialize this value from the given Serde deserializer. Read more
Converts NonZeroU8
to NonZeroI128
losslessly.
Converts NonZeroU8
to NonZeroUsize
losslessly.
Converts NonZeroU8
to NonZeroIsize
losslessly.
Converts NonZeroU8
to NonZeroI32
losslessly.
Converts NonZeroU8
to NonZeroU16
losslessly.
Converts NonZeroU8
to NonZeroU128
losslessly.
Converts NonZeroU8
to NonZeroU64
losslessly.
Converts NonZeroU8
to NonZeroU32
losslessly.
Converts NonZeroU8
to NonZeroI16
losslessly.
Converts NonZeroU8
to NonZeroI64
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 serialize<S>(
&self,
serializer: S
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error> where
S: Serializer,
[src]
pub fn serialize<S>(
&self,
serializer: S
) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error> where
S: Serializer,
[src]Serialize this value into the given Serde serializer. Read more
pub fn try_from(
value: NonZeroI128
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI128>>::Error>
[src]
pub fn try_from(
value: NonZeroI128
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI128>>::Error>
[src]Attempts to convert NonZeroI128
to NonZeroU8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroI16
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI16>>::Error>
[src]
pub fn try_from(
value: NonZeroI16
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI16>>::Error>
[src]Attempts to convert NonZeroI16
to NonZeroU8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroI32
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI32>>::Error>
[src]
pub fn try_from(
value: NonZeroI32
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI32>>::Error>
[src]Attempts to convert NonZeroI32
to NonZeroU8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroI64
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI64>>::Error>
[src]
pub fn try_from(
value: NonZeroI64
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroI64>>::Error>
[src]Attempts to convert NonZeroI64
to NonZeroU8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroIsize
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroIsize>>::Error>
[src]
pub fn try_from(
value: NonZeroIsize
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroIsize>>::Error>
[src]Attempts to convert NonZeroIsize
to NonZeroU8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroU128
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU128>>::Error>
[src]
pub fn try_from(
value: NonZeroU128
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU128>>::Error>
[src]Attempts to convert NonZeroU128
to NonZeroU8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroU16
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU16>>::Error>
[src]
pub fn try_from(
value: NonZeroU16
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU16>>::Error>
[src]Attempts to convert NonZeroU16
to NonZeroU8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroU32
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU32>>::Error>
[src]
pub fn try_from(
value: NonZeroU32
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU32>>::Error>
[src]Attempts to convert NonZeroU32
to NonZeroU8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroU64
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU64>>::Error>
[src]
pub fn try_from(
value: NonZeroU64
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroU64>>::Error>
[src]Attempts to convert NonZeroU64
to NonZeroU8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
pub fn try_from(
value: NonZeroUsize
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroUsize>>::Error>
[src]
pub fn try_from(
value: NonZeroUsize
) -> Result<NonZeroU8, <NonZeroU8 as TryFrom<NonZeroUsize>>::Error>
[src]Attempts to convert NonZeroUsize
to NonZeroU8
.
type Error = TryFromIntError
type Error = TryFromIntError
The type returned in the event of a conversion error.
Auto Trait Implementations
impl RefUnwindSafe for NonZeroU8
impl UnwindSafe for NonZeroU8
Blanket Implementations
Mutably borrows from an owned value. Read more
pub fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>ⓘNotable traits for Box<R, Global>
impl<R> Read for Box<R, Global> where
R: Read + ?Sized, impl<W> Write for Box<W, Global> where
W: Write + ?Sized, impl<I, A> Iterator for Box<I, A> where
A: Allocator,
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F, A> Future for Box<F, A> where
A: Allocator + 'static,
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;
pub fn into_any(self: Box<T, Global>) -> Box<dyn Any + 'static, Global>ⓘNotable traits for Box<R, Global>
impl<R> Read for Box<R, Global> where
R: Read + ?Sized, impl<W> Write for Box<W, Global> where
W: Write + ?Sized, impl<I, A> Iterator for Box<I, A> where
A: Allocator,
I: Iterator + ?Sized, type Item = <I as Iterator>::Item;impl<F, A> Future for Box<F, A> where
A: Allocator + 'static,
F: Future + Unpin + ?Sized, type Output = <F as Future>::Output;
Convert Box<dyn Trait>
(where Trait: Downcast
) to Box<dyn Any>
. Box<dyn Any>
can
then be further downcast
into Box<ConcreteType>
where ConcreteType
implements Trait
. Read more
pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
pub fn into_any_rc(self: Rc<T>) -> Rc<dyn Any + 'static>
Convert Rc<Trait>
(where Trait: Downcast
) to Rc<Any>
. Rc<Any>
can then be
further downcast
into Rc<ConcreteType>
where ConcreteType
implements Trait
. Read more
Convert &Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &Any
’s vtable from &Trait
’s. Read more
pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
pub fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)
Convert &mut Trait
(where Trait: Downcast
) to &Any
. This is needed since Rust cannot
generate &mut Any
’s vtable from &mut Trait
’s. Read more
impl<A> DynCastExt for A
impl<A> DynCastExt for A
pub fn dyn_cast<T>(
self
) -> Result<<A as DynCastExtHelper<T>>::Target, <A as DynCastExtHelper<T>>::Source> where
T: ?Sized,
A: DynCastExtHelper<T>,
pub fn dyn_cast<T>(
self
) -> Result<<A as DynCastExtHelper<T>>::Target, <A as DynCastExtHelper<T>>::Source> where
T: ?Sized,
A: DynCastExtHelper<T>,
Use this to cast from one trait object type to another. Read more
pub fn dyn_upcast<T>(self) -> <A as DynCastExtAdvHelper<T, T>>::Target where
T: ?Sized,
A: DynCastExtAdvHelper<T, T, Source = <A as DynCastExtAdvHelper<T, T>>::Target>,
pub fn dyn_upcast<T>(self) -> <A as DynCastExtAdvHelper<T, T>>::Target where
T: ?Sized,
A: DynCastExtAdvHelper<T, T, Source = <A as DynCastExtAdvHelper<T, T>>::Target>,
Use this to upcast a trait to one of its supertraits. Read more
pub fn dyn_cast_adv<F, T>(
self
) -> Result<<A as DynCastExtAdvHelper<F, T>>::Target, <A as DynCastExtAdvHelper<F, T>>::Source> where
T: ?Sized,
A: DynCastExtAdvHelper<F, T>,
F: ?Sized,
pub fn dyn_cast_adv<F, T>(
self
) -> Result<<A as DynCastExtAdvHelper<F, T>>::Target, <A as DynCastExtAdvHelper<F, T>>::Source> where
T: ?Sized,
A: DynCastExtAdvHelper<F, T>,
F: ?Sized,
pub fn dyn_cast_with_config<C>(
self
) -> Result<<A as DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>>::Target, <A as DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>>::Source> where
C: DynCastConfig,
A: DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>,
pub fn dyn_cast_with_config<C>(
self
) -> Result<<A as DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>>::Target, <A as DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>>::Source> where
C: DynCastConfig,
A: DynCastExtAdvHelper<<C as DynCastConfig>::Source, <C as DynCastConfig>::Target>,
Use this to cast from one trait object type to another. With this method the type parameter is a config type that uniquely specifies which cast should be preformed. Read more
Compare self to key
and return true
if they are equal.
fn instrument(self, span: Span) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
[src]
fn instrument(self, span: Span) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
[src]Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
fn in_current_span(self) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
[src]
fn in_current_span(self) -> Instrumented<Self>ⓘNotable traits for Instrumented<T>
impl<T> Future for Instrumented<T> where
T: Future, type Output = <T as Future>::Output;
[src]pub fn vzip(self) -> V