[−][src]Struct rustc_middle::ty::print::RegionHighlightMode
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<(RegionKind, usize)>; 3]If enabled, when we see the selected region, use "'N"
instead of the ordinary behavior.
highlight_bound_region: Option<(BoundRegion, usize)>If enabled, when printing a "free region" that originated from
the given ty::BoundRegion, 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
impl RegionHighlightMode[src]
pub fn maybe_highlighting_region(
&mut self,
region: Option<Region<'_>>,
number: Option<usize>
)[src]
&mut self,
region: Option<Region<'_>>,
number: Option<usize>
)
If region and number are both Some, invokes
highlighting_region.
pub fn highlighting_region(&mut self, region: Region<'_>, number: usize)[src]
Highlights the region inference variable vid as 'N.
pub fn highlighting_region_vid(&mut self, vid: RegionVid, number: usize)[src]
Convenience wrapper for highlighting_region.
pub(in ty::print::pretty) fn region_highlighted(
&self,
region: Region<'_>
) -> Option<usize>[src]
&self,
region: Region<'_>
) -> Option<usize>
Returns Some(n) with the number to use for the given region, if any.
pub fn highlighting_bound_region(&mut self, br: BoundRegion, number: usize)[src]
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
impl Clone for RegionHighlightMode[src]
pub fn clone(&self) -> RegionHighlightMode[src]
pub fn clone_from(&mut self, source: &Self)1.0.0[src]
impl Copy for RegionHighlightMode[src]
impl Default for RegionHighlightMode[src]
pub fn default() -> RegionHighlightMode[src]
Auto Trait Implementations
impl RefUnwindSafe for RegionHighlightMode
impl Send for RegionHighlightMode
impl Sync for RegionHighlightMode
impl Unpin for RegionHighlightMode
impl UnwindSafe for RegionHighlightMode
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized, [src]
T: 'static + ?Sized,
impl<'tcx, T> ArenaAllocatable<'tcx, ()> for T where
T: Copy, [src]
T: Copy,
pub fn allocate_on(Self, &'a Arena<'tcx>) -> &'a mut T[src]
pub fn allocate_from_iter(
&'a Arena<'tcx>,
impl IntoIterator<Item = T>
) -> &'a mut [T][src]
&'a Arena<'tcx>,
impl IntoIterator<Item = T>
) -> &'a mut [T]
impl<T> Borrow<T> for T where
T: ?Sized, [src]
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized, [src]
T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T[src]
impl<'a, T> Captures<'a> for T where
T: ?Sized, [src]
T: ?Sized,
impl<T> From<T> for T[src]
impl<T, U> Into<U> for T where
U: From<T>, [src]
U: From<T>,
impl<T> MaybeResult<T> for T[src]
type Error = !
pub fn from(Result<T, <T as MaybeResult<T>>::Error>) -> T[src]
pub fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>[src]
impl<T> ToOwned for T where
T: Clone, [src]
T: Clone,
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T[src]
pub fn clone_into(&self, target: &mut T)[src]
impl<T, U> TryFrom<U> for T where
U: Into<T>, [src]
U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]
impl<T, U> TryInto<U> for T where
U: TryFrom<T>, [src]
U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.