Struct rustc_pattern_analysis::pat::DeconstructedPat
source · pub struct DeconstructedPat<Cx: PatCx> {
ctor: Constructor<Cx>,
fields: Vec<IndexedPat<Cx>>,
arity: usize,
ty: Cx::Ty,
data: Cx::PatData,
pub(crate) uid: PatId,
}
Expand description
Values and patterns can be represented as a constructor applied to some fields. This represents
a pattern in this form. A DeconstructedPat
will almost always come from user input; the only
exception are some Wildcard
s introduced during pattern lowering.
Fields§
§ctor: Constructor<Cx>
§fields: Vec<IndexedPat<Cx>>
§arity: usize
The number of fields in this pattern. E.g. if the pattern is SomeStruct { field12: true, .. }
this would be the total number of fields of the struct.
This is also the same as self.ctor.arity(self.ty)
.
ty: Cx::Ty
§data: Cx::PatData
Extra data to store in a pattern.
uid: PatId
Globally-unique id used to track usefulness at the level of subpatterns.
Implementations§
source§impl<Cx: PatCx> DeconstructedPat<Cx>
impl<Cx: PatCx> DeconstructedPat<Cx>
pub fn new( ctor: Constructor<Cx>, fields: Vec<IndexedPat<Cx>>, arity: usize, ty: Cx::Ty, data: Cx::PatData, ) -> Self
pub fn at_index(self, idx: usize) -> IndexedPat<Cx>
pub(crate) fn is_or_pat(&self) -> bool
pub fn ctor(&self) -> &Constructor<Cx>
pub fn ty(&self) -> &Cx::Ty
pub fn arity(&self) -> usize
pub fn iter_fields<'a>(&'a self) -> impl Iterator<Item = &'a IndexedPat<Cx>>
sourcepub(crate) fn specialize<'a>(
&'a self,
other_ctor: &Constructor<Cx>,
other_ctor_arity: usize,
) -> SmallVec<[PatOrWild<'a, Cx>; 2]>
pub(crate) fn specialize<'a>( &'a self, other_ctor: &Constructor<Cx>, other_ctor_arity: usize, ) -> SmallVec<[PatOrWild<'a, Cx>; 2]>
Specialize this pattern with a constructor.
other_ctor
can be different from self.ctor
, but must be covered by it.
Trait Implementations§
source§impl<Cx: PatCx> Debug for DeconstructedPat<Cx>
impl<Cx: PatCx> Debug for DeconstructedPat<Cx>
This is best effort and not good enough for a Display
impl.
source§impl<Cx: PatCx> Hash for DeconstructedPat<Cx>
impl<Cx: PatCx> Hash for DeconstructedPat<Cx>
Delegate to uid
.
source§impl<Cx: PatCx> PartialEq for DeconstructedPat<Cx>
impl<Cx: PatCx> PartialEq for DeconstructedPat<Cx>
Delegate to uid
.
impl<Cx: PatCx> Eq for DeconstructedPat<Cx>
Delegate to uid
.
Auto Trait Implementations§
impl<Cx> Freeze for DeconstructedPat<Cx>
impl<Cx> RefUnwindSafe for DeconstructedPat<Cx>where
<Cx as PatCx>::Ty: RefUnwindSafe,
<Cx as PatCx>::PatData: RefUnwindSafe,
<Cx as PatCx>::VariantIdx: RefUnwindSafe,
<Cx as PatCx>::StrLit: RefUnwindSafe,
impl<Cx> Send for DeconstructedPat<Cx>
impl<Cx> Sync for DeconstructedPat<Cx>
impl<Cx> Unpin for DeconstructedPat<Cx>
impl<Cx> UnwindSafe for DeconstructedPat<Cx>where
<Cx as PatCx>::Ty: UnwindSafe,
<Cx as PatCx>::PatData: UnwindSafe,
<Cx as PatCx>::VariantIdx: UnwindSafe,
<Cx as PatCx>::StrLit: UnwindSafe,
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
source§impl<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§impl<Q, K> Equivalent<K> for Q
impl<Q, K> Equivalent<K> for Q
source§fn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
key
and return true
if they are equal.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: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.