Enum rustc_attr::builtin::UnstableReason

pub enum UnstableReason {
    None,
    Default,
    Some(Symbol),
}

Variants

None

Default

Some(Symbol)

Implementations

impl UnstableReason

fn from_opt_reason(reason: Option<Symbol>) -> Self

pub fn to_opt_reason(&self) -> Option<Symbol>

Trait Implementations

impl Clone for UnstableReason

fn clone(&self) -> UnstableReason

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for UnstableReason

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

Formats the value using the given formatter.

impl<__D: Decoder> Decodable<__D> for UnstableReason

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

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

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

impl Hash for UnstableReason

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

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where
    H: Hasher,

Feeds a slice of this type into the given Hasher.

impl<__CTX> HashStable<__CTX> for UnstableReasonwhere
    __CTX: HashStableContext,

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

impl PartialEq<UnstableReason> for UnstableReason

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

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

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.

impl Copy for UnstableReason

impl Eq for UnstableReason

impl StructuralEq for UnstableReason

impl StructuralPartialEq for UnstableReason

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: 4 bytes

Size for each variant:

• None: 0 bytes
• Default: 0 bytes
• Some: 4 bytes