Struct rustc_middle::ty::print::pretty::RegionHighlightMode

source ·
pub struct RegionHighlightMode<'tcx> {
    highlight_regions: [Option<(Region<'tcx>, usize)>; 3],
    highlight_bound_region: Option<(BoundRegionKind, usize)>,
}
Expand description

The “region highlights” are used to control region printing during specific error messages. When a “region highlight” is enabled, it gives an alternate way to print specific regions. For now, we always print those regions using a number, so something like “'0”.

Regions not selected by the region highlight mode are presently unaffected.

Fields§

§highlight_regions: [Option<(Region<'tcx>, usize)>; 3]

If enabled, when we see the selected region, use “'N” instead of the ordinary behavior.

§highlight_bound_region: Option<(BoundRegionKind, usize)>

If enabled, when printing a “free region” that originated from the given ty::BoundRegionKind, print it as “'1”. Free regions that would ordinarily have names print as normal.

This is used when you have a signature like fn foo(x: &u32, y: &'a u32) and we want to give a name to the region of the reference x.

Implementations§

source§

impl<'tcx> RegionHighlightMode<'tcx>

source

pub fn maybe_highlighting_region( &mut self, region: Option<Region<'tcx>>, number: Option<usize> )

If region and number are both Some, invokes highlighting_region.

source

pub fn highlighting_region(&mut self, region: Region<'tcx>, number: usize)

Highlights the region inference variable vid as 'N.

source

pub fn highlighting_region_vid( &mut self, tcx: TyCtxt<'tcx>, vid: RegionVid, number: usize )

Convenience wrapper for highlighting_region.

source

fn region_highlighted(&self, region: Region<'tcx>) -> Option<usize>

Returns Some(n) with the number to use for the given region, if any.

source

pub fn highlighting_bound_region(&mut self, br: BoundRegionKind, number: usize)

Highlight the given bound region. We can only highlight one bound region at a time. See the field highlight_bound_region for more detailed notes.

Trait Implementations§

source§

impl<'tcx> Clone for RegionHighlightMode<'tcx>

source§

fn clone(&self) -> RegionHighlightMode<'tcx>

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
source§

impl<'tcx> Default for RegionHighlightMode<'tcx>

source§

fn default() -> RegionHighlightMode<'tcx>

Returns the “default value” for a type. Read more
source§

impl<'tcx> Copy for RegionHighlightMode<'tcx>

Auto Trait Implementations§

§

impl<'tcx> Freeze for RegionHighlightMode<'tcx>

§

impl<'tcx> RefUnwindSafe for RegionHighlightMode<'tcx>

§

impl<'tcx> Send for RegionHighlightMode<'tcx>

§

impl<'tcx> Sync for RegionHighlightMode<'tcx>

§

impl<'tcx> Unpin for RegionHighlightMode<'tcx>

§

impl<'tcx> UnwindSafe for RegionHighlightMode<'tcx>

Blanket Implementations§

source§

impl<T> Aligned for T

source§

const ALIGN: Alignment = _

Alignment of Self.
source§

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

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

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

source§

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

source§

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 T
where T: Copy,

source§

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

source§

fn allocate_from_iter<'a>( arena: &'a Arena<'tcx>, iter: impl IntoIterator<Item = T> ) -> &'a mut [T]

source§

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

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

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

source§

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

Mutably borrows from an owned value. Read more
source§

impl<T, R> CollectAndApply<T, R> for T

source§

fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

§

type Output = R

source§

impl<T> Filterable for T

source§

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> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T> Instrument for T

source§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

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

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.

source§

impl<P> IntoQueryParam<P> for P

source§

impl<T> MaybeResult<T> for T

§

type Error = !

source§

fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

source§

fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

source§

impl<T> Same for T

§

type Output = T

Should always be Self
source§

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

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

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

Uses borrowed data to replace owned data, usually by cloning. Read more
source§

impl<'tcx, T> ToPredicate<'tcx, T> for T

source§

fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T

source§

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

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

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

Performs the conversion.
source§

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

§

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

The type returned in the event of a conversion error.
source§

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

Performs the conversion.
source§

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

source§

fn vzip(self) -> V

source§

impl<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

source§

default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed ) -> T

source§

impl<T> WithSubscriber for T

source§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

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

source§

impl<T> ErasedDestructor for T
where T: 'static,

source§

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: 72 bytes