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§

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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]

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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§

Trait Implementations§

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impl Clone for StabilityLevel

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fn clone(&self) -> StabilityLevel

Returns a copy of the value. Read more
1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for StabilityLevel

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<__D: Decoder> Decodable<__D> for StabilityLevel

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fn decode(__decoder: &mut __D) -> Self

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impl<__E: Encoder> Encodable<__E> for StabilityLevel

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fn encode(&self, __encoder: &mut __E)

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impl Hash for StabilityLevel

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fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl<__CTX> HashStable<__CTX> for StabilityLevelwhere __CTX: HashStableContext,

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fn hash_stable(&self, __hcx: &mut __CTX, __hasher: &mut StableHasher)

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impl PartialEq<StabilityLevel> for StabilityLevel

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fn eq(&self, other: &StabilityLevel) -> bool

This method tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for StabilityLevel

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impl Eq for StabilityLevel

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impl StructuralEq for StabilityLevel

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impl StructuralPartialEq for StabilityLevel

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

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 bytes
  • Stable: 7 bytes