Enum rustc_trait_selection::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)

Some kind of type inference variable.

Tuple Fields of Ty

0: CanonicalTyVarKind

PlaceholderTy(Placeholder<BoundVar>)

A “placeholder” that represents “any type”.

Tuple Fields of PlaceholderTy

0: Placeholder<BoundVar>

Region(UniverseIndex)

Region variable '?R.

Tuple Fields of Region

0: UniverseIndex

PlaceholderRegion(Placeholder<BoundRegionKind>)

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.

Tuple Fields of PlaceholderRegion

0: Placeholder<BoundRegionKind>

Const(UniverseIndex)

Some kind of const inference variable.

Tuple Fields of Const

0: UniverseIndex

PlaceholderConst(Placeholder<BoundConst<'tcx>>)

A “placeholder” that represents “any const”.

Tuple Fields of PlaceholderConst

0: Placeholder<BoundConst<'tcx>>

Auto Trait Implementations

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

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

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

Variants

Tuple Fields of Ty

Tuple Fields of PlaceholderTy

Tuple Fields of Region

Tuple Fields of PlaceholderRegion

Tuple Fields of Const

Tuple Fields of PlaceholderConst

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,

pub fn type_id(&self) -> TypeId

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

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

pub fn allocate_from_iter( arena: &'a Arena<'tcx>, iter: 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<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<'tcx, T> Subst<'tcx> for T where T: TypeFoldable<'tcx>,

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

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

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>

Layout

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

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

pub fn allocate_from_iter(
arena: &'a Arena<'tcx>,
iter: 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<T, U> Into<U> for T where
U: From<T>,

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

pub fn subst_spanned(
self,
tcx: TyCtxt<'tcx>,
substs: &[GenericArg<'tcx>],
span: Option<Span>
) -> 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>,