Enum rustc_trait_selection::infer::type_variable::TypeVariableOriginKind

source · [−]

pub enum TypeVariableOriginKind {
    MiscVariable,
    NormalizeProjectionType,
    TypeInference,
    TypeParameterDefinition(Symbol, Option<DefId>),
    ClosureSynthetic,
    SubstitutionPlaceholder,
    AutoDeref,
    AdjustmentType,
    DynReturnFn,
    LatticeVariable,
}

Expand description

Reasons to create a type inference variable

Variants

`MiscVariable`

`NormalizeProjectionType`

`TypeInference`

`TypeParameterDefinition(Symbol, Option<DefId>)`

`ClosureSynthetic`

One of the upvars or closure kind parameters in a ClosureSubsts (before it has been determined).

`SubstitutionPlaceholder`

`AutoDeref`

`AdjustmentType`

`DynReturnFn`

In type check, when we are type checking a function that returns -> dyn Foo, we substitute a type variable for the return type for diagnostic purposes.

`LatticeVariable`

Auto Trait Implementations

impl RefUnwindSafe for TypeVariableOriginKind

impl Send for TypeVariableOriginKind

impl Sync for TypeVariableOriginKind

impl Unpin for TypeVariableOriginKind

impl UnwindSafe for TypeVariableOriginKind

Blanket Implementations

source

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

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

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fn allocate_from_iter(
arena: &'a Arena<'tcx>,
iter: impl IntoIterator<Item = T>
) -> &'a mut [T]ⓘNotable traits for &mut [u8]`impl Write for &mut [u8]impl Read for &[u8]`

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

const: unstable · source

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,

const: unstable · source

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

Mutably borrows from an owned value. Read more

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impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source

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> ToOwned for T where
T: Clone,

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 for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

source

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

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source

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

Performs the conversion.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 12 bytes

Size for each variant:

MiscVariable: 0 bytes
NormalizeProjectionType: 0 bytes
TypeInference: 0 bytes
TypeParameterDefinition: 12 bytes
ClosureSynthetic: 0 bytes
SubstitutionPlaceholder: 0 bytes
AutoDeref: 0 bytes
AdjustmentType: 0 bytes
DynReturnFn: 0 bytes
LatticeVariable: 0 bytes

Enum rustc_trait_selection::infer::type_variable::TypeVariableOriginKind

Variants

MiscVariable

NormalizeProjectionType

TypeInference

TypeParameterDefinition(Symbol, Option<DefId>)

ClosureSynthetic

SubstitutionPlaceholder

AutoDeref

AdjustmentType

DynReturnFn

LatticeVariable

Auto Trait Implementations

impl RefUnwindSafe for TypeVariableOriginKind

impl Send for TypeVariableOriginKind

impl Sync for TypeVariableOriginKind

impl Unpin for TypeVariableOriginKind

impl UnwindSafe for TypeVariableOriginKind

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

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

fn allocate_from_iter( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T>) -> &'a mut [T]ⓘNotable traits for &mut [u8]impl Write for &mut [u8]impl Read for &[u8]

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

fn borrow(&self) -> &T

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

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

type Owned = T

fn to_owned(&self) -> T

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

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

type Error = Infallible

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

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

Layout

`MiscVariable`

`NormalizeProjectionType`

`TypeInference`

`TypeParameterDefinition(Symbol, Option<DefId>)`

`ClosureSynthetic`

`SubstitutionPlaceholder`

`AutoDeref`

`AdjustmentType`

`DynReturnFn`

`LatticeVariable`

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

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

fn allocate_from_iter(
arena: &'a Arena<'tcx>,
iter: impl IntoIterator<Item = T>
) -> &'a mut [T]ⓘNotable traits for &mut [u8]`impl Write for &mut [u8]impl Read for &[u8]`

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<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>,