Enum rustc_attr::builtin::StabilityLevel
source · pub enum StabilityLevel {
Unstable {
reason: UnstableReason,
issue: Option<NonZeroU32>,
is_soft: bool,
implied_by: Option<Symbol>,
},
Stable {
since: Symbol,
allowed_through_unstable_modules: bool,
},
}
Expand description
The available stability levels.
Variants
Unstable
Fields
reason: UnstableReason
Reason for the current stability level.
issue: Option<NonZeroU32>
Relevant rust-lang/rust
issue.
is_soft: bool
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 a 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() {}
#[unstable]
Stable
Fields
since: Symbol
Rust release which stabilized this feature.
allowed_through_unstable_modules: bool
Is this item allowed to be referred to on stable, despite being contained in unstable modules?
#[stable]
Implementations
sourceimpl StabilityLevel
impl StabilityLevel
Trait Implementations
sourceimpl Clone for StabilityLevel
impl Clone for StabilityLevel
sourcefn clone(&self) -> StabilityLevel
fn clone(&self) -> StabilityLevel
Returns a copy of the value. Read more
1.0.0 · sourcefn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresourceimpl Debug for StabilityLevel
impl Debug for StabilityLevel
sourceimpl<__D: Decoder> Decodable<__D> for StabilityLevel
impl<__D: Decoder> Decodable<__D> for StabilityLevel
sourceimpl<__E: Encoder> Encodable<__E> for StabilityLevel
impl<__E: Encoder> Encodable<__E> for StabilityLevel
sourceimpl Hash for StabilityLevel
impl Hash for StabilityLevel
sourceimpl<__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)
sourceimpl PartialEq<StabilityLevel> for StabilityLevel
impl PartialEq<StabilityLevel> for StabilityLevel
sourcefn eq(&self, other: &StabilityLevel) -> bool
fn eq(&self, other: &StabilityLevel) -> bool
impl Copy for StabilityLevel
impl Eq for StabilityLevel
impl StructuralEq for StabilityLevel
impl StructuralPartialEq for StabilityLevel
Auto Trait Implementations
impl RefUnwindSafe for StabilityLevel
impl Send for StabilityLevel
impl Sync for StabilityLevel
impl Unpin for StabilityLevel
impl UnwindSafe for StabilityLevel
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
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
: 7 bytes