pub enum TypeVariableOriginKind {
MiscVariable,
NormalizeProjectionType,
TypeInference,
OpaqueTypeInference(DefId),
TypeParameterDefinition(Symbol, DefId),
ClosureSynthetic,
AutoDeref,
AdjustmentType,
DynReturnFn,
LatticeVariable,
}
Expand description
Reasons to create a type inference variable
Variants§
MiscVariable
NormalizeProjectionType
TypeInference
OpaqueTypeInference(DefId)
TypeParameterDefinition(Symbol, DefId)
ClosureSynthetic
One of the upvars or closure kind parameters in a ClosureArgs
(before it has been determined).
AutoDeref
AdjustmentType
DynReturnFn
In type check, when we are type checking a function that
returns -> dyn Foo
, we instantiate a type variable with the
return type for diagnostic purposes.
LatticeVariable
Trait Implementations§
source§impl Clone for TypeVariableOriginKind
impl Clone for TypeVariableOriginKind
source§fn clone(&self) -> TypeVariableOriginKind
fn clone(&self) -> TypeVariableOriginKind
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moresource§impl Debug for TypeVariableOriginKind
impl Debug for TypeVariableOriginKind
impl Copy for TypeVariableOriginKind
Auto Trait Implementations§
impl Freeze for TypeVariableOriginKind
impl RefUnwindSafe for TypeVariableOriginKind
impl Send for TypeVariableOriginKind
impl Sync for TypeVariableOriginKind
impl Unpin for TypeVariableOriginKind
impl UnwindSafe for TypeVariableOriginKind
Blanket Implementations§
source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T
fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T> ) -> &'a mut [T]
source§impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
impl<'tcx, T> ArenaAllocatable<'tcx, IsCopy> for Twhere
T: Copy,
fn allocate_on<'a>(self, arena: &'a Arena<'tcx>) -> &'a mut T
fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T> ) -> &'a mut [T]
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
§impl<T> Filterable for T
impl<T> Filterable for T
source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<P> IntoQueryParam<P> for P
impl<P> IntoQueryParam<P> for P
fn into_query_param(self) -> P
source§impl<T> MaybeResult<T> for T
impl<T> MaybeResult<T> for T
source§impl<'tcx, T> ToPredicate<'tcx, T> for T
impl<'tcx, T> ToPredicate<'tcx, T> for T
fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T
source§impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
impl<Tcx, T> Value<Tcx> for Twhere
Tcx: DepContext,
default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed ) -> T
source§impl<T> WithSubscriber for T
impl<T> WithSubscriber for T
source§fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
source§fn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
impl<'a, T> Captures<'a> for Twhere
T: ?Sized,
impl<T> ErasedDestructor for Twhere
T: 'static,
impl<T> MaybeSendSync for T
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: 16 bytes
Size for each variant:
MiscVariable
: 0 bytesNormalizeProjectionType
: 0 bytesTypeInference
: 0 bytesOpaqueTypeInference
: 8 bytesTypeParameterDefinition
: 12 bytesClosureSynthetic
: 0 bytesAutoDeref
: 0 bytesAdjustmentType
: 0 bytesDynReturnFn
: 0 bytesLatticeVariable
: 0 bytes