Struct rustc_middle::mir::UserTypeProjection
source · pub struct UserTypeProjection {
pub base: UserTypeAnnotationIndex,
pub projs: Vec<ProjectionKind>,
}
Expand description
Encodes the effect of a user-supplied type annotation on the
subcomponents of a pattern. The effect is determined by applying the
given list of projections to some underlying base type. Often,
the projection element list projs
is empty, in which case this
directly encodes a type in base
. But in the case of complex patterns with
subpatterns and bindings, we want to apply only a part of the type to a variable,
in which case the projs
vector is used.
Examples:
-
let x: T = ...
– here, theprojs
vector is empty. -
let (x, _): T = ...
– here, theprojs
vector would containfield[0]
(aka.0
), indicating that the type ofs
is determined by finding the type of the.0
field fromT
.
Fields§
§base: UserTypeAnnotationIndex
§projs: Vec<ProjectionKind>
Implementations§
source§impl UserTypeProjection
impl UserTypeProjection
pub(crate) fn index(self) -> Self
pub(crate) fn subslice(self, from: u64, to: u64) -> Self
pub(crate) fn deref(self) -> Self
pub(crate) fn leaf(self, field: FieldIdx) -> Self
pub(crate) fn variant( self, adt_def: AdtDef<'_>, variant_index: VariantIdx, field_index: FieldIdx, ) -> Self
Trait Implementations§
source§impl Clone for UserTypeProjection
impl Clone for UserTypeProjection
source§fn clone(&self) -> UserTypeProjection
fn clone(&self) -> UserTypeProjection
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for UserTypeProjection
impl Debug for UserTypeProjection
source§impl<__D: TyDecoder> Decodable<__D> for UserTypeProjection
impl<__D: TyDecoder> Decodable<__D> for UserTypeProjection
source§impl<__E: TyEncoder> Encodable<__E> for UserTypeProjection
impl<__E: TyEncoder> Encodable<__E> for UserTypeProjection
source§impl Hash for UserTypeProjection
impl Hash for UserTypeProjection
source§impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for UserTypeProjection
impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for UserTypeProjection
fn hash_stable( &self, __hcx: &mut StableHashingContext<'__ctx>, __hasher: &mut StableHasher, )
source§impl PartialEq for UserTypeProjection
impl PartialEq for UserTypeProjection
source§fn eq(&self, other: &UserTypeProjection) -> bool
fn eq(&self, other: &UserTypeProjection) -> bool
self
and other
values to be equal, and is used
by ==
.source§impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UserTypeProjection
impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UserTypeProjection
source§fn try_fold_with<__F: FallibleTypeFolder<TyCtxt<'tcx>>>(
self,
__folder: &mut __F,
) -> Result<Self, __F::Error>
fn try_fold_with<__F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, __folder: &mut __F, ) -> Result<Self, __F::Error>
source§fn fold_with<F>(self, folder: &mut F) -> Selfwhere
F: TypeFolder<I>,
fn fold_with<F>(self, folder: &mut F) -> Selfwhere
F: TypeFolder<I>,
try_fold_with
for use with infallible
folders. Do not override this method, to ensure coherence with
try_fold_with
.source§impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for UserTypeProjection
impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for UserTypeProjection
source§fn visit_with<__V: TypeVisitor<TyCtxt<'tcx>>>(
&self,
__visitor: &mut __V,
) -> __V::Result
fn visit_with<__V: TypeVisitor<TyCtxt<'tcx>>>( &self, __visitor: &mut __V, ) -> __V::Result
impl StructuralPartialEq for UserTypeProjection
Auto Trait Implementations§
impl Freeze for UserTypeProjection
impl RefUnwindSafe for UserTypeProjection
impl Send for UserTypeProjection
impl Sync for UserTypeProjection
impl Unpin for UserTypeProjection
impl UnwindSafe for UserTypeProjection
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> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§default unsafe fn clone_to_uninit(&self, dst: *mut T)
default 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<Tcx, T> DepNodeParams<Tcx> for T
impl<Tcx, T> DepNodeParams<Tcx> for T
default fn fingerprint_style() -> FingerprintStyle
source§default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint
default fn to_fingerprint(&self, tcx: Tcx) -> Fingerprint
default fn to_debug_str(&self, _: Tcx) -> String
source§default fn recover(_: Tcx, _: &DepNode) -> Option<T>
default fn recover(_: Tcx, _: &DepNode) -> Option<T>
DepNode
,
something which is needed when forcing DepNode
s during red-green
evaluation. The query system will only call this method if
fingerprint_style()
is not FingerprintStyle::Opaque
.
It is always valid to return None
here, in which case incremental
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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>
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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>
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if into_left
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.
Converts self
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.
Converts self
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source§impl<I, T> TypeVisitableExt<I> for Twhere
I: Interner,
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impl<I, T> TypeVisitableExt<I> for Twhere
I: Interner,
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source§fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool
true
if self
has any late-bound regions that are either
bound by binder
or bound by some binder outside of binder
.
If binder
is ty::INNERMOST
, this indicates whether
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source§fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool
fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool
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hence are not bound by it).source§fn has_escaping_bound_vars(&self) -> bool
fn has_escaping_bound_vars(&self) -> bool
true
if this type has regions that are not a part of the type.
For example, for<'a> fn(&'a i32)
return false
, while fn(&'a i32)
would return true
. The latter can occur when traversing through the
former. Read morefn has_aliases(&self) -> bool
fn has_inherent_projections(&self) -> bool
fn has_opaque_types(&self) -> bool
fn has_coroutines(&self) -> bool
fn references_error(&self) -> bool
fn has_non_region_param(&self) -> bool
fn has_infer_regions(&self) -> bool
fn has_infer_types(&self) -> bool
fn has_non_region_infer(&self) -> bool
fn has_infer(&self) -> bool
fn has_placeholders(&self) -> bool
fn has_non_region_placeholders(&self) -> bool
fn has_param(&self) -> bool
source§fn has_free_regions(&self) -> bool
fn has_free_regions(&self) -> bool
fn has_erased_regions(&self) -> bool
source§fn has_erasable_regions(&self) -> bool
fn has_erasable_regions(&self) -> bool
source§fn is_global(&self) -> bool
fn is_global(&self) -> bool
source§fn has_bound_regions(&self) -> bool
fn has_bound_regions(&self) -> bool
source§fn has_non_region_bound_vars(&self) -> bool
fn has_non_region_bound_vars(&self) -> bool
source§fn has_bound_vars(&self) -> bool
fn has_bound_vars(&self) -> bool
source§fn still_further_specializable(&self) -> bool
fn still_further_specializable(&self) -> bool
impl
specialization.source§impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
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U: UpcastFrom<I, T>,
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source§impl<Tcx, T> Value<Tcx> for Twhere
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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: 32 bytes