Enum rustc_infer::infer::canonical::CanonicalVarKind

pub enum CanonicalVarKind<I>where
    I: Interner,{
    Ty(CanonicalTyVarKind),
    PlaceholderTy(<I as Interner>::PlaceholderTy),
    Region(UniverseIndex),
    PlaceholderRegion(<I as Interner>::PlaceholderRegion),
    Const(UniverseIndex, <I as Interner>::Ty),
    Effect,
    PlaceholderConst(<I as Interner>::PlaceholderConst, <I as Interner>::Ty),
}

Expand description

Describes the “kind” of the canonical variable. This is a “kind” in the type-theory sense of the term – i.e., a “meta” type system that analyzes type-like values.

Variants§

Ty(CanonicalTyVarKind)

Some kind of type inference variable.

PlaceholderTy(<I as Interner>::PlaceholderTy)

A “placeholder” that represents “any type”.

Region(UniverseIndex)

Region variable '?R.

PlaceholderRegion(<I as Interner>::PlaceholderRegion)

A “placeholder” that represents “any region”. Created when you are solving a goal like for<'a> T: Foo<'a> to represent the bound region 'a.

Const(UniverseIndex, <I as Interner>::Ty)

Some kind of const inference variable.

Effect

Effect variable '?E.

PlaceholderConst(<I as Interner>::PlaceholderConst, <I as Interner>::Ty)

A “placeholder” that represents “any const”.

Auto Trait Implementations§

impl<I> RefUnwindSafe for CanonicalVarKind<I>
where <I as Interner>::PlaceholderConst: RefUnwindSafe, <I as Interner>::PlaceholderRegion: RefUnwindSafe, <I as Interner>::PlaceholderTy: RefUnwindSafe, <I as Interner>::Ty: RefUnwindSafe,

impl<I> Send for CanonicalVarKind<I>
where <I as Interner>::PlaceholderConst: Send, <I as Interner>::PlaceholderRegion: Send, <I as Interner>::PlaceholderTy: Send, <I as Interner>::Ty: Send,

impl<I> Sync for CanonicalVarKind<I>
where <I as Interner>::PlaceholderConst: Sync, <I as Interner>::PlaceholderRegion: Sync, <I as Interner>::PlaceholderTy: Sync, <I as Interner>::Ty: Sync,

impl<I> Unpin for CanonicalVarKind<I>
where <I as Interner>::PlaceholderConst: Unpin, <I as Interner>::PlaceholderRegion: Unpin, <I as Interner>::PlaceholderTy: Unpin, <I as Interner>::Ty: Unpin,

impl<I> UnwindSafe for CanonicalVarKind<I>
where <I as Interner>::PlaceholderConst: UnwindSafe, <I as Interner>::PlaceholderRegion: UnwindSafe, <I as Interner>::PlaceholderTy: UnwindSafe, <I as Interner>::Ty: UnwindSafe,

Blanket Implementations§

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

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

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

type Error = Infallible

The type returned in the event of a conversion error.

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

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.

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.