Enum rustc_pattern_analysis::pat::PatOrWild
source · pub(crate) enum PatOrWild<'p, Cx: PatCx> {
Wild,
Pat(&'p DeconstructedPat<Cx>),
}
Expand description
Represents either a pattern obtained from user input or a wildcard constructed during the
algorithm. Do not use Wild
to represent a wildcard pattern comping from user input.
This is morally Option<&'p DeconstructedPat>
where None
is interpreted as a wildcard.
Variants§
Wild
A non-user-provided wildcard, created during specialization.
Pat(&'p DeconstructedPat<Cx>)
A user-provided pattern.
Implementations§
source§impl<'p, Cx: PatCx> PatOrWild<'p, Cx>
impl<'p, Cx: PatCx> PatOrWild<'p, Cx>
pub(crate) fn as_pat(&self) -> Option<&'p DeconstructedPat<Cx>>
pub(crate) fn ctor(self) -> &'p Constructor<Cx>
pub(crate) fn is_or_pat(&self) -> bool
sourcepub(crate) fn expand_or_pat(self) -> SmallVec<[Self; 1]>
pub(crate) fn expand_or_pat(self) -> SmallVec<[Self; 1]>
Expand this or-pattern into its alternatives. This only expands one or-pattern; use
flatten_or_pat
to recursively expand nested or-patterns.
sourcepub(crate) fn flatten_or_pat(self) -> SmallVec<[Self; 1]>
pub(crate) fn flatten_or_pat(self) -> SmallVec<[Self; 1]>
Recursively expand this (possibly-nested) or-pattern into its alternatives.
sourcepub(crate) fn specialize(
&self,
other_ctor: &Constructor<Cx>,
ctor_arity: usize,
) -> SmallVec<[PatOrWild<'p, Cx>; 2]>
pub(crate) fn specialize( &self, other_ctor: &Constructor<Cx>, ctor_arity: usize, ) -> SmallVec<[PatOrWild<'p, Cx>; 2]>
Specialize this pattern with a constructor.
other_ctor
can be different from self.ctor
, but must be covered by it.
Trait Implementations§
impl<'p, Cx: PatCx> Copy for PatOrWild<'p, Cx>
Auto Trait Implementations§
impl<'p, Cx> Freeze for PatOrWild<'p, Cx>
impl<'p, Cx> RefUnwindSafe for PatOrWild<'p, Cx>where
<Cx as PatCx>::Ty: RefUnwindSafe,
<Cx as PatCx>::PatData: RefUnwindSafe,
<Cx as PatCx>::VariantIdx: RefUnwindSafe,
<Cx as PatCx>::StrLit: RefUnwindSafe,
impl<'p, Cx> Send for PatOrWild<'p, Cx>
impl<'p, Cx> Sync for PatOrWild<'p, Cx>
impl<'p, Cx> Unpin for PatOrWild<'p, Cx>
impl<'p, Cx> UnwindSafe for PatOrWild<'p, Cx>where
<Cx as PatCx>::Ty: RefUnwindSafe,
<Cx as PatCx>::PatData: RefUnwindSafe,
<Cx as PatCx>::VariantIdx: RefUnwindSafe,
<Cx as PatCx>::StrLit: RefUnwindSafe,
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
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
clone_to_uninit
)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>
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>
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>
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<'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: 8 bytes
Size for each variant:
Wild
: 0 bytesPat
: 8 bytes