Enum rustc_infer::infer::canonical::CanonicalVarKind[−][src]

pub enum CanonicalVarKind<'tcx> {
    Ty(CanonicalTyVarKind),
    PlaceholderTy(Placeholder<BoundVar>),
    Region(UniverseIndex),
    PlaceholderRegion(Placeholder<BoundRegionKind>),
    Const(UniverseIndex),
    PlaceholderConst(Placeholder<BoundConst<'tcx>>),
}
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)
Expand description

Some kind of type inference variable.

PlaceholderTy(Placeholder<BoundVar>)
Expand description

A “placeholder” that represents “any type”.

Region(UniverseIndex)
Expand description

Region variable '?R.

PlaceholderRegion(Placeholder<BoundRegionKind>)
Expand description

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)
Expand description

Some kind of const inference variable.

PlaceholderConst(Placeholder<BoundConst<'tcx>>)
Expand description

A “placeholder” that represents “any const”.

Auto Trait Implementations

impl<'tcx> !RefUnwindSafe for CanonicalVarKind<'tcx>

impl<'tcx> !Send for CanonicalVarKind<'tcx>

impl<'tcx> !Sync for CanonicalVarKind<'tcx>

impl<'tcx> Unpin for CanonicalVarKind<'tcx>

impl<'tcx> !UnwindSafe for CanonicalVarKind<'tcx>

Blanket Implementations

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

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

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

pub fn allocate_on(self, arena: &'a Arena<'tcx>) -> &'a mut T[src]

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

impl<T> Borrow<T> for T where
    T: ?Sized, [src]

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized, [src]

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T, U> Into<U> for T where
    U: From<T>, [src]

pub fn into(self) -> U[src]

Performs the conversion.

impl<'tcx, T> Subst<'tcx> for T where
    T: TypeFoldable<'tcx>, [src]

pub fn subst_spanned(
    self,
    tcx: TyCtxt<'tcx>,
    substs: &[GenericArg<'tcx>],
    span: Option<Span>
) -> T[src]

fn subst(self, tcx: TyCtxt<'tcx>, substs: &[GenericArg<'tcx>]) -> Self[src]

impl<T> ToOwned for T where
    T: Clone, [src]

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

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

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

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

recently added

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

impl<T, U> TryFrom<U> for T where
    U: Into<T>, [src]

type Error = Infallible

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, [src]

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

The type returned in the event of a conversion error.

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

Performs the conversion.

impl<T> WithConstness for T[src]

fn with_constness(self, constness: Constness) -> ConstnessAnd<Self>[src]

fn with_const(self) -> ConstnessAnd<Self>[src]

fn without_const(self) -> ConstnessAnd<Self>[src]

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