rustc_type_ir::const_kind

Enum ConstKind

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pub enum ConstKind<I: Interner> {
    Param(I::ParamConst),
    Infer(InferConst),
    Bound(DebruijnIndex, I::BoundConst),
    Placeholder(I::PlaceholderConst),
    Unevaluated(UnevaluatedConst<I>),
    Value(I::Ty, I::ValueConst),
    Error(I::ErrorGuaranteed),
    Expr(I::ExprConst),
}
Expand description

Represents a constant in Rust.

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Param(I::ParamConst)

A const generic parameter.

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Infer(InferConst)

Infer the value of the const.

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Bound(DebruijnIndex, I::BoundConst)

Bound const variable, used only when preparing a trait query.

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Placeholder(I::PlaceholderConst)

A placeholder const - universally quantified higher-ranked const.

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Unevaluated(UnevaluatedConst<I>)

An unnormalized const item such as an anon const or assoc const or free const item. Right now anything other than anon consts does not actually work properly but this should

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Value(I::Ty, I::ValueConst)

Used to hold computed value.

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Error(I::ErrorGuaranteed)

A placeholder for a const which could not be computed; this is propagated to avoid useless error messages.

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Expr(I::ExprConst)

Unevaluated non-const-item, used by feature(generic_const_exprs) to represent const arguments such as N + 1 or foo(N)

Trait Implementations§

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

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fn clone(&self) -> Self

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<I: Interner> Debug for ConstKind<I>

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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<I: Interner, __D: TyDecoder<I = I>> Decodable<__D> for ConstKind<I>

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

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impl<I: Interner, __E: TyEncoder<I = I>> Encodable<__E> for ConstKind<I>

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

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

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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<I: Interner, __CTX> HashStable<__CTX> for ConstKind<I>
where I::ParamConst: HashStable<__CTX>, I::BoundConst: HashStable<__CTX>, I::PlaceholderConst: HashStable<__CTX>, UnevaluatedConst<I>: HashStable<__CTX>, I::Ty: HashStable<__CTX>, I::ValueConst: HashStable<__CTX>, I::ErrorGuaranteed: HashStable<__CTX>, I::ExprConst: HashStable<__CTX>,

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

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

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fn eq(&self, __other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<I> Copy for ConstKind<I>
where I: Interner,

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

Auto Trait Implementations§

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impl<I> DynSend for ConstKind<I>

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impl<I> DynSync for ConstKind<I>

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impl<I> Freeze for ConstKind<I>

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impl<I> RefUnwindSafe for ConstKind<I>

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impl<I> Send for ConstKind<I>

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impl<I> Sync for ConstKind<I>

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impl<I> Unpin for ConstKind<I>

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impl<I> UnwindSafe for ConstKind<I>

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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impl<T> Any for T
where 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 T
where 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 T
where 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> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T, R> CollectAndApply<T, R> for T

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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<_>>()).

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type Output = R

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

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

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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

Compare self to key and return true if they are equal.
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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> Instrument for T

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where 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> IntoEither for T

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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
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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
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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where 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 T
where 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 T
where 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.
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impl<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

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

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

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

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impl<T> WithSubscriber for T

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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
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<'a, T> Captures<'a> for T
where T: ?Sized,

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.