Enum rustc_infer::infer::type_variable::TypeVariableOriginKind

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

Expand description

Reasons to create a type inference variable

Variants

`MiscVariable`

`NormalizeProjectionType`

`TypeInference`

`OpaqueTypeInference(DefId)`

`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`

Trait Implementations

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impl Clone for TypeVariableOriginKind

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fn clone(&self) -> TypeVariableOriginKind

Returns a copy of the value. Read more

1.0.0 · source

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

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impl Debug for TypeVariableOriginKind

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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 Copy for TypeVariableOriginKind

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

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impl<T> Any for Twhere
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 Twhere
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 &[u8]`impl Read for &[u8]impl Write for &mut [u8]`

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impl<T> Borrow<T> for Twhere
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 Twhere
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 Twhere
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 Twhere
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 Twhere
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.

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impl<T, U> TryInto for Twhere
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.

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impl<'a, T> Captures<'a> for Twhere
T: ?Sized,

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
OpaqueTypeInference: 12 bytes
TypeParameterDefinition: 12 bytes
ClosureSynthetic: 0 bytes
SubstitutionPlaceholder: 0 bytes
AutoDeref: 0 bytes
AdjustmentType: 0 bytes
DynReturnFn: 0 bytes
LatticeVariable: 0 bytes

Enum rustc_infer::infer::type_variable::TypeVariableOriginKind

Variants

MiscVariable

NormalizeProjectionType

TypeInference

OpaqueTypeInference(DefId)

TypeParameterDefinition(Symbol, Option<DefId>)

ClosureSynthetic

SubstitutionPlaceholder

AutoDeref

AdjustmentType

DynReturnFn

LatticeVariable

Trait Implementations

impl Clone for TypeVariableOriginKind

fn clone(&self) -> TypeVariableOriginKind

fn clone_from(&mut self, source: &Self)

impl Debug for TypeVariableOriginKind

fn fmt(&self, f: &mut Formatter<'_>) -> Result

impl Copy for TypeVariableOriginKind

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 Twhere T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere 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 &[u8]impl Read for &[u8]impl Write for &mut [u8]

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

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Twhere 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 Twhere U: From<T>,

fn into(self) -> U

impl<T> ToOwned for Twhere T: Clone,

type Owned = T

fn to_owned(&self) -> T

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

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

type Error = Infallible

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

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

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

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

impl<'a, T> Captures<'a> for Twhere T: ?Sized,

Layout

`MiscVariable`

`NormalizeProjectionType`

`TypeInference`

`OpaqueTypeInference(DefId)`

`TypeParameterDefinition(Symbol, Option<DefId>)`

`ClosureSynthetic`

`SubstitutionPlaceholder`

`AutoDeref`

`AdjustmentType`

`DynReturnFn`

`LatticeVariable`

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

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

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

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

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

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

impl<T> ToOwned for Twhere
T: Clone,

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

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

impl<'a, T> Captures<'a> for Twhere
T: ?Sized,