Struct rustc_infer::infer::outlives::obligations::TypeOutlives
source · pub struct TypeOutlives<'cx, 'tcx, D>where
D: TypeOutlivesDelegate<'tcx>,{
delegate: D,
tcx: TyCtxt<'tcx>,
verify_bound: VerifyBoundCx<'cx, 'tcx>,
}
Expand description
The TypeOutlives
struct has the job of “lowering” a T: 'a
obligation into a series of 'a: 'b
constraints and “verify“s, as
described on the module comment. The final constraints are emitted
via a “delegate” of type D
– this is usually the infcx
, which
accrues them into the region_obligations
code, but for NLL we
use something else.
Fields§
§delegate: D
§tcx: TyCtxt<'tcx>
§verify_bound: VerifyBoundCx<'cx, 'tcx>
Implementations§
source§impl<'cx, 'tcx, D> TypeOutlives<'cx, 'tcx, D>where
D: TypeOutlivesDelegate<'tcx>,
impl<'cx, 'tcx, D> TypeOutlives<'cx, 'tcx, D>where
D: TypeOutlivesDelegate<'tcx>,
pub fn new( delegate: D, tcx: TyCtxt<'tcx>, region_bound_pairs: &'cx RegionBoundPairs<'tcx>, implicit_region_bound: Option<Region<'tcx>>, caller_bounds: &'cx [PolyTypeOutlivesPredicate<'tcx>], ) -> Self
sourcepub fn type_must_outlive(
&mut self,
origin: SubregionOrigin<'tcx>,
ty: Ty<'tcx>,
region: Region<'tcx>,
category: ConstraintCategory<'tcx>,
)
pub fn type_must_outlive( &mut self, origin: SubregionOrigin<'tcx>, ty: Ty<'tcx>, region: Region<'tcx>, category: ConstraintCategory<'tcx>, )
Adds constraints to inference such that T: 'a
holds (or
reports an error if it cannot).
§Parameters
origin
, the reason we need this constraintty
, the typeT
region
, the region'a
fn components_must_outlive( &mut self, origin: SubregionOrigin<'tcx>, components: &[Component<TyCtxt<'tcx>>], region: Region<'tcx>, category: ConstraintCategory<'tcx>, )
fn param_ty_must_outlive( &mut self, origin: SubregionOrigin<'tcx>, region: Region<'tcx>, param_ty: ParamTy, )
fn placeholder_ty_must_outlive( &mut self, origin: SubregionOrigin<'tcx>, region: Region<'tcx>, placeholder_ty: PlaceholderType, )
fn alias_ty_must_outlive( &mut self, origin: SubregionOrigin<'tcx>, region: Region<'tcx>, alias_ty: AliasTy<'tcx>, )
fn args_must_outlive( &mut self, args: GenericArgsRef<'tcx>, origin: SubregionOrigin<'tcx>, region: Region<'tcx>, opt_variances: Option<&[Variance]>, )
Auto Trait Implementations§
impl<'cx, 'tcx, D> Freeze for TypeOutlives<'cx, 'tcx, D>where
D: Freeze,
impl<'cx, 'tcx, D> !RefUnwindSafe for TypeOutlives<'cx, 'tcx, D>
impl<'cx, 'tcx, D> !Send for TypeOutlives<'cx, 'tcx, D>
impl<'cx, 'tcx, D> !Sync for TypeOutlives<'cx, 'tcx, D>
impl<'cx, 'tcx, D> Unpin for TypeOutlives<'cx, 'tcx, D>where
D: Unpin,
impl<'cx, 'tcx, D> !UnwindSafe for TypeOutlives<'cx, 'tcx, D>
Blanket Implementations§
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
source§impl<T> Filterable for T
impl<T> Filterable for T
source§fn filterable(
self,
filter_name: &'static str,
) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>
Creates a filterable data provider with the given name for debugging. Read more
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<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left
is true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
Converts
self
into a Left
variant of Either<Self, Self>
if into_left(&self)
returns true
.
Converts self
into a Right
variant of Either<Self, Self>
otherwise. Read moresource§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<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
source§impl<I, T> UpcastFrom<I, T> for T
impl<I, T> UpcastFrom<I, T> for T
fn upcast_from(from: T, _tcx: I) -> 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: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.