Enum rustc_attr::builtin::StabilityLevel
source · pub enum StabilityLevel {
Unstable {
reason: UnstableReason,
issue: Option<NonZero<u32>>,
is_soft: bool,
implied_by: Option<Symbol>,
},
Stable {
since: StableSince,
allowed_through_unstable_modules: bool,
},
}
Expand description
The available stability levels.
Variants§
Unstable
#[unstable]
Fields
§
reason: UnstableReason
Reason for the current stability level.
§
implied_by: Option<Symbol>
If part of a feature is stabilized and a new feature is added for the remaining parts,
then the implied_by
attribute is used to indicate which now-stable feature previously
contained an item.
#[unstable(feature = "foo", issue = "...")]
fn foo() {}
#[unstable(feature = "foo", issue = "...")]
fn foobar() {}
…becomes…
#[stable(feature = "foo", since = "1.XX.X")]
fn foo() {}
#[unstable(feature = "foobar", issue = "...", implied_by = "foo")]
fn foobar() {}
Stable
#[stable]
Fields
§
since: StableSince
Rust release which stabilized this feature.
Implementations§
Trait Implementations§
source§impl Clone for StabilityLevel
impl Clone for StabilityLevel
source§fn clone(&self) -> StabilityLevel
fn clone(&self) -> StabilityLevel
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl Debug for StabilityLevel
impl Debug for StabilityLevel
source§impl<__D: SpanDecoder> Decodable<__D> for StabilityLevel
impl<__D: SpanDecoder> Decodable<__D> for StabilityLevel
source§impl<__E: SpanEncoder> Encodable<__E> for StabilityLevel
impl<__E: SpanEncoder> Encodable<__E> for StabilityLevel
source§impl Hash for StabilityLevel
impl Hash for StabilityLevel
source§impl<__CTX> HashStable<__CTX> for StabilityLevelwhere
__CTX: HashStableContext,
impl<__CTX> HashStable<__CTX> for StabilityLevelwhere
__CTX: HashStableContext,
fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)
source§impl PartialEq for StabilityLevel
impl PartialEq for StabilityLevel
impl Copy for StabilityLevel
impl Eq for StabilityLevel
impl StructuralPartialEq for StabilityLevel
Auto Trait Implementations§
impl Freeze for StabilityLevel
impl RefUnwindSafe for StabilityLevel
impl Send for StabilityLevel
impl Sync for StabilityLevel
impl Unpin for StabilityLevel
impl UnwindSafe for StabilityLevel
Blanket Implementations§
source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T
fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T>, ) -> &'a mut [T]
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit
)source§impl<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Compare self to
key
and return true
if they are equal.source§impl<T> Filterable for T
impl<T> Filterable for T
source§fn filterable(
self,
filter_name: &'static str,
) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
Creates a filterable data provider with the given name for debugging. Read more
source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
source§impl<I, T> UpcastFrom<I, T> for T
impl<I, T> UpcastFrom<I, T> for T
fn upcast_from(from: T, _tcx: I) -> T
source§impl<T> WithSubscriber for T
impl<T> WithSubscriber for T
source§fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
source§fn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
impl<'a, T> Captures<'a> for Twhere
T: ?Sized,
impl<T> ErasedDestructor for Twhere
T: 'static,
impl<T> MaybeSendSync for T
Layout§
Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.
Size: 16 bytes
Size for each variant:
Unstable
: 15 bytesStable
: 9 bytes