Enum rustc_middle::ty::VariantDiscr[−][src]

pub enum VariantDiscr {
    Explicit(DefId),
    Relative(u32),
}

Variants

Explicit(DefId)

Explicit value for this variant, i.e., X = 123. The DefId corresponds to the embedded constant.

Tuple Fields of Explicit

0: DefId

Relative(u32)

The previous variant’s discriminant plus one. For efficiency reasons, the distance from the last Explicit discriminant is being stored, or 0 for the first variant, if it has none.

Tuple Fields of Relative

0: u32

Trait Implementations

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impl Clone for VariantDiscr

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fn clone(&self) -> VariantDiscr

Returns a copy of the value. Read more

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

Performs copy-assignment from source. Read more

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impl Debug for VariantDiscr

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

Formats the value using the given formatter. Read more

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fn hash_stable(
 &self,
 hcx: &mut StableHashingContext<'ctx>,
 __hasher: &mut StableHasher
)

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impl PartialEq<VariantDiscr> for VariantDiscr

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

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

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

This method tests for !=.

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impl StructuralEq for VariantDiscr

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impl StructuralPartialEq for VariantDiscr

Auto Trait Implementations

impl RefUnwindSafe for VariantDiscr

impl UnwindSafe for VariantDiscr

Blanket Implementations

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

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pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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impl<'tcx, T> ArenaAllocatable<'tcx, ()> for T where
T: Copy,

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pub fn allocate_on(Self, &'a Arena<'tcx>) -> &'a mut T

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pub fn allocate_from_iter(
&'a Arena<'tcx>,
impl IntoIterator<Item = T>
) -> &'a mut [T]

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impl<T> Borrow<T> for T where
T: ?Sized,

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pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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impl<T> BorrowMut<T> for T where
T: ?Sized,

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

Mutably borrows from an owned value. Read more

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impl<Ctxt, T> DepNodeParams<Ctxt> for T where
Ctxt: DepContext,
T: for<'a> HashStable<StableHashingContext<'a>> + Debug,

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pub default fn fingerprint_style() -> FingerprintStyle

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pub default fn to_fingerprint(&self, tcx: Ctxt) -> Fingerprint

This method turns the parameters of a DepNodeConstructor into an opaque Fingerprint to be used in DepNode. Not all DepNodeParams support being turned into a Fingerprint (they don’t need to if the corresponding DepNode is anonymous). Read more

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pub default fn to_debug_str(&self, Ctxt) -> String

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pub default fn recover(
Ctxt,
&DepNode<<Ctxt as DepContext>::DepKind>
) -> Option<T>

This method tries to recover the query key from the given DepNode, something which is needed when forcing DepNodes during red-green evaluation. The query system will only call this method if fingerprint_style() is not FingerprintStyle::Opaque. It is always valid to return None here, in which case incremental compilation will treat the query as having changed instead of forcing it. Read more

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impl<T> From<T> for T

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pub fn from(t: T) -> T

Performs the conversion.

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

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pub fn into(self) -> U

Performs the conversion.

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impl<T> MaybeResult<T> for T

type Error = !

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pub fn from(Result<T, <T as MaybeResult<T>>::Error>) -> T

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pub fn to_result(Self) -> Result<T, <T as MaybeResult<T>>::Error>

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impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

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pub fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

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pub fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

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impl<T, U> TryFrom for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

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pub fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

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impl<T, U> TryInto for T where
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

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pub fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

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impl<T> WithConstness for T

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fn with_constness(self, constness: BoundConstness) -> ConstnessAnd<Self>

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fn with_const_if_const(self) -> ConstnessAnd<Self>

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fn without_const(self) -> ConstnessAnd<Self>

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impl<'a, T> Captures<'a> for T where
T: ?Sized,

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: 12 bytes

Size for each variant:

Explicit: 8 bytes
Relative: 4 bytes

Enum rustc_middle::ty::VariantDiscr[−][src]

Variants

Tuple Fields of Explicit

Tuple Fields of Relative

Trait Implementations

impl Clone for VariantDiscr

fn clone(&self) -> VariantDiscr

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

impl Debug for VariantDiscr

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

impl<'tcx, __D: TyDecoder<'tcx>> Decodable<__D> for VariantDiscr

fn decode(__decoder: &mut __D) -> Result<Self, <__D as Decoder>::Error>

impl<'tcx, __E: TyEncoder<'tcx>> Encodable<__E> for VariantDiscr

fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>

impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for VariantDiscr

fn hash_stable( &self, __hcx: &mut StableHashingContext<'__ctx>, __hasher: &mut StableHasher)

impl PartialEq<VariantDiscr> for VariantDiscr

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

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

impl Copy for VariantDiscr

impl Eq for VariantDiscr

impl StructuralEq for VariantDiscr

impl StructuralPartialEq for VariantDiscr

Auto Trait Implementations

impl RefUnwindSafe for VariantDiscr

impl Send for VariantDiscr

impl Sync for VariantDiscr

impl Unpin for VariantDiscr

impl UnwindSafe for VariantDiscr

Blanket Implementations

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

pub fn type_id(&self) -> TypeId

impl<'tcx, T> ArenaAllocatable<'tcx, ()> for T where T: Copy,

pub fn allocate_on(Self, &'a Arena<'tcx>) -> &'a mut T

pub fn allocate_from_iter( &'a Arena<'tcx>, impl IntoIterator<Item = T>) -> &'a mut [T]

impl<T> Borrow<T> for T where T: ?Sized,

pub fn borrow(&self) -> &T

impl<T> BorrowMut<T> for T where T: ?Sized,

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

impl<Ctxt, T> DepNodeParams<Ctxt> for T where Ctxt: DepContext, T: for<'a> HashStable<StableHashingContext<'a>> + Debug,

pub default fn fingerprint_style() -> FingerprintStyle

pub default fn to_fingerprint(&self, tcx: Ctxt) -> Fingerprint

pub default fn to_debug_str(&self, Ctxt) -> String

pub default fn recover( Ctxt, &DepNode<<Ctxt as DepContext>::DepKind>) -> Option<T>

impl<T> From<T> for T

pub fn from(t: T) -> T

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

pub fn into(self) -> U

impl<T> MaybeResult<T> for T

type Error = !

pub fn from(Result<T, <T as MaybeResult<T>>::Error>) -> T

pub fn to_result(Self) -> Result<T, <T as MaybeResult<T>>::Error>

impl<T> ToOwned for T where T: Clone,

type Owned = T

pub fn to_owned(&self) -> T

pub fn clone_into(&self, target: &mut T)

impl<T, U> TryFrom<U> for T where U: Into<T>,

type Error = Infallible

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

impl<T, U> TryInto<U> for T where U: TryFrom<T>,

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

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

impl<T> WithConstness for T

fn with_constness(self, constness: BoundConstness) -> ConstnessAnd<Self>

fn with_const_if_const(self) -> ConstnessAnd<Self>

fn without_const(self) -> ConstnessAnd<Self>

impl<'a, T> Captures<'a> for T where T: ?Sized,

Layout

impl<'tcx, D: TyDecoder<'tcx>> Decodable<D> for VariantDiscr

fn decode(decoder: &mut D) -> Result<Self, <__D as Decoder>::Error>

impl<'tcx, E: TyEncoder<'tcx>> Encodable<E> for VariantDiscr

fn encode(&self, encoder: &mut E) -> Result<(), <__E as Encoder>::Error>

impl<'ctx> HashStable<StableHashingContext<'ctx>> for VariantDiscr

fn hash_stable(
&self,
hcx: &mut StableHashingContext<'ctx>,
__hasher: &mut StableHasher
)

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

impl<'tcx, T> ArenaAllocatable<'tcx, ()> for T where
T: Copy,

pub fn allocate_from_iter(
&'a Arena<'tcx>,
impl IntoIterator<Item = T>
) -> &'a mut [T]

impl<T> Borrow<T> for T where
T: ?Sized,

impl<T> BorrowMut<T> for T where
T: ?Sized,

impl<Ctxt, T> DepNodeParams<Ctxt> for T where
Ctxt: DepContext,
T: for<'a> HashStable<StableHashingContext<'a>> + Debug,

pub default fn recover(
Ctxt,
&DepNode<<Ctxt as DepContext>::DepKind>
) -> Option<T>

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

impl<T> ToOwned for T where
T: Clone,

impl<T, U> TryFrom<U> for T where
U: Into<T>,

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

impl<'a, T> Captures<'a> for T where
T: ?Sized,