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.
§
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() {}
#[unstable]
Stable
Fields
#[stable]
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: Decoder> Decodable<__D> for StabilityLevel
impl<__D: Decoder> Decodable<__D> for StabilityLevel
source§impl<__E: Encoder> Encodable<__E> for StabilityLevel
impl<__E: Encoder> 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<StabilityLevel> for StabilityLevel
impl PartialEq<StabilityLevel> for StabilityLevel
source§fn eq(&self, other: &StabilityLevel) -> bool
fn eq(&self, other: &StabilityLevel) -> bool
This method tests for
self
and other
values to be equal, and is used
by ==
.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§
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
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