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Const

rustc_trait_selection::infer::canonical::ir

Struct Const

pub struct Const<I>(pub <I as Interner>::InternedConstKind)
where
    I: Interner;

Tuple Fields§

§0: <I as Interner>::InternedConstKind

Implementations§

impl<I> Const<I>
where I: Interner,

pub fn kind(self) -> ConstKind<I>

pub fn new(interner: I, kind: ConstKind<I>) -> Const<I>

pub fn new_var(interner: I, infer: ConstVid) -> Const<I>

pub fn new_infer(interner: I, infer: InferConst) -> Const<I>

pub fn new_bound( interner: I, debruijn: DebruijnIndex, bound_const: BoundConst<I>, ) -> Const<I>

pub fn new_anon_bound( interner: I, debruijn: DebruijnIndex, var: BoundVar, ) -> Const<I>

pub fn new_canonical_bound(interner: I, var: BoundVar) -> Const<I>

pub fn new_placeholder( interner: I, placeholder: Placeholder<I, BoundConst<I>>, ) -> Const<I>

pub fn new_alias( interner: I, is_rigid: IsRigid, alias_const: Alias<I, AliasConstKind<I>>, ) -> Const<I>

pub fn new_expr(interner: I, expr: <I as Interner>::ExprConst) -> Const<I>

pub fn new_error(interner: I, e: <I as Interner>::ErrorGuaranteed) -> Const<I>

pub fn is_ct_var(self) -> bool

pub fn is_ct_error(self) -> bool

pub fn new_param(interner: I, param: <I as Interner>::ParamConst) -> Const<I>

pub fn new_fresh(interner: I, fresh: u32) -> Const<I>

pub fn new_misc_error(interner: I) -> Const<I>

pub fn new_error_with_message( interner: I, span: <I as Interner>::Span, msg: impl ToString, ) -> Const<I>

pub fn is_trivially_wf(self) -> bool

pub fn is_ct_infer(self) -> bool

pub fn ct_vid(self) -> Option<ConstVid>

Trait Implementations§

impl<I> Clone for Const<I>
where I: Interner,

fn clone(&self) -> Const<I>

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

impl<'tcx> ConstExt<'tcx> for Const<TyCtxt<'tcx>>

fn from_bits( tcx: TyCtxt<'tcx>, bits: u128, typing_env: TypingEnv<'tcx>, ty: Ty<'tcx>, ) -> Const<TyCtxt<'tcx>>

Creates a constant with the given integer value and interns it.

fn zero_sized(tcx: TyCtxt<'tcx>, ty: Ty<'tcx>) -> Const<TyCtxt<'tcx>>

Creates an interned zst constant.

fn from_bool(tcx: TyCtxt<'tcx>, v: bool) -> Const<TyCtxt<'tcx>>

Creates an interned bool constant.

fn from_target_usize(tcx: TyCtxt<'tcx>, n: u64) -> Const<TyCtxt<'tcx>>

Creates an interned usize constant.

fn to_value(self) -> Value<'tcx>

Panics if self.kind != ty::ConstKind::Value.

fn try_to_value(self) -> Option<Value<'tcx>>

Attempts to convert to a value.

Note that this does not normalize the constant.

fn to_leaf(self) -> ScalarInt

Converts to a ValTreeKind::Leaf value, panic’ing if this constant is some other kind.

Note that this does not normalize the constant.

fn to_branch(self) -> &'tcx [Const<TyCtxt<'tcx>>]

Converts to a ValTreeKind::Branch value, panic’ing if this constant is some other kind.

Note that this does not normalize the constant.

fn try_to_leaf(self) -> Option<ScalarInt>

Attempts to convert to a ValTreeKind::Leaf value.

Note that this does not normalize the constant.

fn try_to_scalar(self) -> Option<Scalar>

Attempts to convert to a ValTreeKind::Leaf value.

Note that this does not normalize the constant.

fn try_to_branch(self) -> Option<&'tcx [Const<TyCtxt<'tcx>>]>

Attempts to convert to a ValTreeKind::Branch value.

Note that this does not normalize the constant.

fn try_to_target_usize(self, tcx: TyCtxt<'tcx>) -> Option<u64>

Convenience method to extract the value of a usize constant, useful to get the length of an array type.

Note that this does not evaluate the constant.

fn walk(self) -> TypeWalker<TyCtxt<'tcx>> ⓘ

Iterator that walks self and any types reachable from self, in depth-first order. Note that just walks the types that appear in self, it does not descend into the fields of structs or variants. For example:

isize => { isize }
Foo<Bar<isize>> => { Foo<Bar<isize>>, Bar<isize>, isize }
[isize] => { [isize], isize }

fn new_value( tcx: TyCtxt<'tcx>, valtree: ValTree<'tcx>, ty: Ty<'tcx>, ) -> Const<TyCtxt<'tcx>>

impl<I> Copy for Const<I>
where I: Interner,

impl<I> Debug for Const<I>
where I: Interner,

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

Formats the value using the given formatter. Read more

impl<I, D> Decodable<D> for Const<I>
where I: Interner, D: InternerDecoder<Interner = I>, ConstKind<I>: Decodable<D>,

fn decode(decoder: &mut D) -> Const<I>

impl<I> Display for Const<I>
where I: Interner + IrPrint<Const<I>>,

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

Formats the value using the given formatter. Read more

impl<I, E> Encodable<E> for Const<I>
where I: Interner, E: Encoder, ConstKind<I>: Encodable<E>,

fn encode(&self, e: &mut E)

impl<I> Eq for Const<I>
where I: Interner,

impl Erasable for Const<TyCtxt<'_>>

type Storage = [u8; 8]

Storage type to used for erased values of this type. Should be [u8; N], where N is equal to size_of::<Self>. Read more

impl<I> Flags for Const<I>
where I: Interner,

fn flags(&self) -> TypeFlags

fn outer_exclusive_binder(&self) -> DebruijnIndex

impl<I, V> GenericTypeVisitable<V> for Const<I>
where I: Interner, <I as Interner>::InternedConstKind: GenericTypeVisitable<__V>,

fn generic_visit_with(&self, visitor: &mut V)

impl<I> Hash for Const<I>
where I: Interner,

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

Feeds this value into the given Hasher. Read more

1.3.0 · Source§

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

impl<I> IntoKind for Const<I>
where I: Interner,

type Kind = ConstKind<I>

fn kind(self) -> ConstKind<I>

impl<I, J> Lift<J> for Const<I>
where I: Interner + LiftInto<J>, J: Interner,

type Lifted = Const<J>

fn lift_to_interner(self, interner: J) -> Const<J>

impl<I> PartialEq for Const<I>
where I: Interner,

fn eq(&self, __other: &Const<I>) -> bool

Equality operator ==. Read more

1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more

impl<'tcx, P> Print<P> for Const<TyCtxt<'tcx>>
where P: Printer<'tcx>,

fn print(&self, p: &mut P) -> Result<(), Error>

impl<I> Relate<I> for Const<I>
where I: Interner,

fn relate<R>( relation: &mut R, a: Const<I>, b: Const<I>, ) -> Result<Const<I>, TypeError<I>>
where R: TypeRelation<I>,

impl<I> StableHash for Const<I>
where I: Interner, <I as Interner>::InternedConstKind: StableHash,

fn stable_hash<Hcx>( &self, hcx: &mut Hcx, hasher: &mut StableHasher<SipHasher128>, )
where __Hcx: StableHashCtxt,

impl<'tcx> ToTrace<'tcx> for Const<TyCtxt<'tcx>>

fn to_trace( cause: &ObligationCause<'tcx>, a: Const<TyCtxt<'tcx>>, b: Const<TyCtxt<'tcx>>, ) -> TypeTrace<'tcx>

impl<I> TypeFoldable<I> for Const<I>
where I: Interner,

fn try_fold_with<F>( self, folder: &mut F, ) -> Result<Const<I>, <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

The entry point for folding. To fold a value t with a folder f call: t.try_fold_with(f). Read more

fn fold_with<F>(self, folder: &mut F) -> Const<I>
where F: TypeFolder<I>,

The entry point for folding. To fold a value t with a folder f call: t.fold_with(f). Read more

impl<I> TypeSuperFoldable<I> for Const<I>
where I: Interner,

fn try_super_fold_with<F>( self, folder: &mut F, ) -> Result<Const<I>, <F as FallibleTypeFolder<I>>::Error>
where F: FallibleTypeFolder<I>,

Provides a default fold for a recursive type of interest. This should only be called within TypeFolder methods, when a non-custom traversal is desired for the value of the type of interest passed to that method. For example, in MyFolder::try_fold_ty(ty), it is valid to call ty.try_super_fold_with(self), but any other folding should be done with xyz.try_fold_with(self).

fn super_fold_with<F>(self, folder: &mut F) -> Const<I>
where F: TypeFolder<I>,

A convenient alternative to try_super_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_super_fold_with.

impl<I> TypeSuperVisitable<I> for Const<I>
where I: Interner,

fn super_visit_with<V>(&self, visitor: &mut V) -> <V as TypeVisitor<I>>::Result
where V: TypeVisitor<I>,

Provides a default visit for a recursive type of interest. This should only be called within TypeVisitor methods, when a non-custom traversal is desired for the value of the type of interest passed to that method. For example, in MyVisitor::visit_ty(ty), it is valid to call ty.super_visit_with(self), but any other visiting should be done with xyz.visit_with(self).

impl<I> TypeVisitable<I> for Const<I>
where I: Interner,

fn visit_with<V>(&self, visitor: &mut V) -> <V as TypeVisitor<I>>::Result
where V: TypeVisitor<I>,

The entry point for visiting. To visit a value t with a visitor v call: t.visit_with(v). Read more

Auto Trait Implementations§

impl<I> DynSend for Const<I>
where <I as Interner>::InternedConstKind: DynSend,

impl<I> DynSync for Const<I>
where <I as Interner>::InternedConstKind: DynSync,

impl<I> Freeze for Const<I>
where <I as Interner>::InternedConstKind: Freeze,

impl<I> RefUnwindSafe for Const<I>
where <I as Interner>::InternedConstKind: RefUnwindSafe,

impl<I> Send for Const<I>
where <I as Interner>::InternedConstKind: Send,

impl<I> Sync for Const<I>
where <I as Interner>::InternedConstKind: Sync,

impl<I> Unpin for Const<I>
where <I as Interner>::InternedConstKind: Unpin,

impl<I> UnsafeUnpin for Const<I>
where <I as Interner>::InternedConstKind: UnsafeUnpin,

impl<I> UnwindSafe for Const<I>
where <I as Interner>::InternedConstKind: UnwindSafe,

Blanket Implementations§

impl<T> Aligned for T

const ALIGN: Alignment

Alignment of Self.

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> AnyEq for T
where T: Any + PartialEq,

fn equals(&self, other: &(dyn Any + 'static)) -> bool

fn as_any(&self) -> &(dyn Any + 'static)

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

fn allocate_on(self, arena: &'tcx Arena<'tcx>) -> &'tcx mut T

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

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

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

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

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

Mutably borrows from an owned value. Read more

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

unsafe fn clone_to_uninit(&self, dest: *mut u8)

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

Performs copy-assignment from self to dest. Read more

impl<T, R> CollectAndApply<T, R> for T

fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

type Output = R

impl<'tcx, T> DepNodeKey<'tcx> for T
where T: StableHash + Debug,

default fn key_fingerprint_style() -> KeyFingerprintStyle

default fn to_fingerprint(&self, tcx: TyCtxt<'tcx>) -> Fingerprint

This method turns a query key into an opaque Fingerprint to be used in DepNode.

default fn try_recover_key(_: TyCtxt<'tcx>, _: &DepNode) -> 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.

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

fn __clone_box(&self, _: Private) -> *mut ()

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more

impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.

impl<T> ErasedDestructor for T
where T: 'static,

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self> ⓘ

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

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

fn into(self) -> U

Calls U::from(self).

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

impl<T> IntoEither for T

fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

impl<K> IntoQueryKey<K> for K

fn into_query_key(self) -> K

Argument conversion from Self to K. This should always be a very cheap conversion, e.g. LocalDefId::to_def_id.

impl<'tcx, T> IsSuggestable<'tcx> for T
where T: TypeVisitable<TyCtxt<'tcx>> + TypeFoldable<TyCtxt<'tcx>>,

fn is_suggestable(self, tcx: TyCtxt<'tcx>, infer_suggestable: bool) -> bool

Whether this makes sense to suggest in a diagnostic. Read more

fn make_suggestable( self, tcx: TyCtxt<'tcx>, infer_suggestable: bool, placeholder: Option<Ty<'tcx>>, ) -> Option<T>

impl<T> MaybeResult<T> for T

type Error = !

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

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

impl<T> Pointable for T

const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

impl<T> Same for T

type Output = T

Should always be Self

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

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

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

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

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

impl<T> ToString for T
where T: Display + ?Sized,

fn to_string(&self) -> String

Converts the given value to a String. Read more

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

type Error = !

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, !>

Performs the conversion.

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

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

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<I, T> TypeVisitableExt<I> for T
where I: Interner, T: TypeVisitable<I>,

fn has_type_flags(&self, flags: TypeFlags) -> bool

fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool

Returns true if self has any late-bound regions that are either bound by binder or bound by some binder outside of binder. If binder is ty::INNERMOST, this indicates whether there are any late-bound regions that appear free.

fn error_reported(&self) -> Result<(), <I as Interner>::ErrorGuaranteed>

fn non_region_error_reported( &self, ) -> Result<(), <I as Interner>::ErrorGuaranteed>

fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool

Returns true if this type has any regions that escape binder (and hence are not bound by it).

fn has_escaping_bound_vars(&self) -> bool

Returns true if this type has regions that are not a part of the type. For example, given a for<'a> fn(&'a i32) this function returns false, while given a fn(&'a i32) it returns true. The latter can occur when traversing through the former. Read more

fn has_aliases(&self) -> bool

fn has_opaque_types(&self) -> bool

fn has_coroutines(&self) -> bool

fn references_error(&self) -> bool

fn has_non_region_param(&self) -> bool

fn has_regions(&self) -> bool

fn has_infer_regions(&self) -> bool

fn has_infer_types(&self) -> bool

fn has_non_region_infer(&self) -> bool

fn has_infer(&self) -> bool

fn has_placeholders(&self) -> bool

fn has_non_region_placeholders(&self) -> bool

fn has_param(&self) -> bool

fn has_free_regions(&self) -> bool

“Free” regions in this context means that it has any region that is not (a) erased or (b) late-bound.

fn has_erased_regions(&self) -> bool

fn has_erasable_regions(&self) -> bool

True if there are any un-erased free regions.

fn is_global(&self) -> bool

Indicates whether this value references only ‘global’ generic parameters that are the same regardless of what fn we are in. This is used for caching.

fn has_bound_regions(&self) -> bool

True if there are any late-bound regions

fn has_non_region_bound_vars(&self) -> bool

True if there are any late-bound non-region variables

fn has_bound_vars(&self) -> bool

True if there are any bound variables

fn still_further_specializable(&self) -> bool

Indicates whether this value still has parameters/placeholders/inference variables which could be replaced later, in a way that would change the results of impl specialization.

fn has_non_region_error(&self) -> bool

True if a type or const error is reachable

fn has_rigid_aliases(&self) -> bool

True if an alias has IsRigid::Yes. Used for skipping normalization.

fn has_non_rigid_aliases(&self) -> bool

True if an alias has IsRigid::No.

impl<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

fn upcast(self, interner: I) -> U

impl<I, T> UpcastFrom<I, T> for T

fn upcast_from(from: T, _tcx: I) -> T

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

fn vzip(self) -> V

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> ⓘ
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more

Layout§

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.