Struct rustc_pattern_analysis::pat::WitnessPat
source · pub struct WitnessPat<Cx: PatCx> {
ctor: Constructor<Cx>,
pub(crate) fields: Vec<WitnessPat<Cx>>,
ty: Cx::Ty,
}
Expand description
Same idea as DeconstructedPat
, except this is a fictitious pattern built up for diagnostics
purposes. As such they don’t use interning and can be cloned.
Fields§
§ctor: Constructor<Cx>
§fields: Vec<WitnessPat<Cx>>
§ty: Cx::Ty
Implementations§
source§impl<Cx: PatCx> WitnessPat<Cx>
impl<Cx: PatCx> WitnessPat<Cx>
pub(crate) fn new(ctor: Constructor<Cx>, fields: Vec<Self>, ty: Cx::Ty) -> Self
sourcepub(crate) fn wildcard(cx: &Cx, ty: Cx::Ty) -> Self
pub(crate) fn wildcard(cx: &Cx, ty: Cx::Ty) -> Self
Create a wildcard pattern for this type. If the type is empty, we create a !
pattern.
sourcepub(crate) fn wild_from_ctor(cx: &Cx, ctor: Constructor<Cx>, ty: Cx::Ty) -> Self
pub(crate) fn wild_from_ctor(cx: &Cx, ctor: Constructor<Cx>, ty: Cx::Ty) -> Self
Construct a pattern that matches everything that starts with this constructor.
For example, if ctor
is a Constructor::Variant
for Option::Some
, we get the pattern
Some(_)
.
pub fn ctor(&self) -> &Constructor<Cx>
pub fn ty(&self) -> &Cx::Ty
pub fn is_never_pattern(&self) -> bool
pub fn iter_fields(&self) -> impl Iterator<Item = &WitnessPat<Cx>>
Trait Implementations§
source§impl<Cx: PatCx> Clone for WitnessPat<Cx>
impl<Cx: PatCx> Clone for WitnessPat<Cx>
Auto Trait Implementations§
impl<Cx> Freeze for WitnessPat<Cx>
impl<Cx> RefUnwindSafe for WitnessPat<Cx>where
<Cx as PatCx>::Ty: RefUnwindSafe,
<Cx as PatCx>::VariantIdx: RefUnwindSafe,
<Cx as PatCx>::StrLit: RefUnwindSafe,
impl<Cx> Send for WitnessPat<Cx>
impl<Cx> Sync for WitnessPat<Cx>
impl<Cx> Unpin for WitnessPat<Cx>
impl<Cx> UnwindSafe for WitnessPat<Cx>where
<Cx as PatCx>::Ty: 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
Mutably borrows from an owned value. Read more
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)
🔬This is a nightly-only experimental API. (
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>
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<'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.