Struct rustc_middle::mir::UserTypeProjection[][src]

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 proejctions 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.


  • let x: T = ... – here, the projs vector is empty.

  • let (x, _): T = ... – here, the projs vector would contain field[0] (aka .0), indicating that the type of s is determined by finding the type of the .0 field from T.


base: UserTypeAnnotationIndexprojs: Vec<ProjectionKind>


impl UserTypeProjection[src]

pub(crate) fn index(self) -> Self[src]

pub(crate) fn subslice(self, from: u64, to: u64) -> Self[src]

pub(crate) fn deref(self) -> Self[src]

pub(crate) fn leaf(self, field: Field) -> Self[src]

pub(crate) fn variant(
    adt_def: &AdtDef,
    variant_index: VariantIdx,
    field: Field
) -> Self

Trait Implementations

impl Clone for UserTypeProjection[src]

fn clone(&self) -> UserTypeProjection[src]

Returns a copy of the value. Read more

fn clone_from(&mut self, source: &Self)1.0.0[src]

Performs copy-assignment from source. Read more

impl Debug for UserTypeProjection[src]

fn fmt(&self, f: &mut Formatter<'_>) -> Result[src]

Formats the value using the given formatter. Read more

impl<'tcx, __D: TyDecoder<'tcx>> Decodable<__D> for UserTypeProjection[src]

fn decode(__decoder: &mut __D) -> Result<Self, <__D as Decoder>::Error>[src]

impl<'tcx, __E: TyEncoder<'tcx>> Encodable<__E> for UserTypeProjection[src]

fn encode(&self, __encoder: &mut __E) -> Result<(), <__E as Encoder>::Error>[src]

impl Hash for UserTypeProjection[src]

fn hash<__H: Hasher>(&self, state: &mut __H)[src]

Feeds this value into the given Hasher. Read more

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher

Feeds a slice of this type into the given Hasher. Read more

impl<'__ctx> HashStable<StableHashingContext<'__ctx>> for UserTypeProjection[src]

fn hash_stable(
    __hcx: &mut StableHashingContext<'__ctx>,
    __hasher: &mut StableHasher

impl PartialEq<UserTypeProjection> for UserTypeProjection[src]

fn eq(&self, other: &UserTypeProjection) -> bool[src]

This method tests for self and other values to be equal, and is used by ==. Read more

fn ne(&self, other: &UserTypeProjection) -> bool[src]

This method tests for !=.

impl<'tcx> TypeFoldable<'tcx> for UserTypeProjection[src]

fn super_fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self[src]

fn super_visit_with<Vs: TypeVisitor<'tcx>>(
    visitor: &mut Vs
) -> ControlFlow<Vs::BreakTy>

fn fold_with<F: TypeFolder<'tcx>>(self, folder: &mut F) -> Self[src]

fn visit_with<V: TypeVisitor<'tcx>>(
    visitor: &mut V
) -> ControlFlow<V::BreakTy>

fn has_vars_bound_at_or_above(&self, binder: DebruijnIndex) -> bool[src]

Returns 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 there are any late-bound regions that appear free. Read more

fn has_vars_bound_above(&self, binder: DebruijnIndex) -> bool[src]

Returns true if this self has any regions that escape binder (and hence are not bound by it). Read more

fn has_escaping_bound_vars(&self) -> bool[src]

fn has_type_flags(&self, flags: TypeFlags) -> bool[src]

fn has_projections(&self) -> bool[src]

fn has_opaque_types(&self) -> bool[src]

fn references_error(&self) -> bool[src]

fn has_param_types_or_consts(&self) -> bool[src]

fn has_infer_regions(&self) -> bool[src]

fn has_infer_types(&self) -> bool[src]

fn has_infer_types_or_consts(&self) -> bool[src]

fn needs_infer(&self) -> bool[src]

fn has_placeholders(&self) -> bool[src]

fn needs_subst(&self) -> bool[src]

fn has_free_regions(&self) -> bool[src]

“Free” regions in this context means that it has any region that is not (a) erased or (b) late-bound. Read more

fn has_erased_regions(&self) -> bool[src]

fn has_erasable_regions(&self) -> bool[src]

True if there are any un-erased free regions.

fn is_global(&self) -> bool[src]

Indicates whether this value references only ‘global’ generic parameters that are the same regardless of what fn we are in. This is used for caching. Read more

fn has_late_bound_regions(&self) -> bool[src]

True if there are any late-bound regions

fn still_further_specializable(&self) -> bool[src]

Indicates whether this value still has parameters/placeholders/inference variables which could be replaced later, in a way that would change the results of impl specialization. Read more

impl StructuralPartialEq for UserTypeProjection[src]

Auto Trait Implementations

impl RefUnwindSafe for UserTypeProjection

impl Send for UserTypeProjection

impl Sync for UserTypeProjection

impl Unpin for UserTypeProjection

impl UnwindSafe for UserTypeProjection

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized

pub fn type_id(&self) -> TypeId[src]

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
    T: ?Sized

pub fn borrow(&self) -> &T[src]

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
    T: ?Sized

pub fn borrow_mut(&mut self) -> &mut T[src]

Mutably borrows from an owned value. Read more

impl<T> From<T> for T[src]

pub fn from(t: T) -> T[src]

Performs the conversion.

impl<T, U> Into<U> for T where
    U: From<T>, 

pub fn into(self) -> U[src]

Performs the conversion.

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<'tcx, T> Subst<'tcx> for T where
    T: TypeFoldable<'tcx>, 

pub fn subst_spanned(Self, TyCtxt<'tcx>, &[GenericArg<'tcx>], Option<Span>) -> T[src]

fn subst(self, tcx: TyCtxt<'tcx>, substs: &[GenericArg<'tcx>]) -> Self[src]

impl<T> ToOwned for T where
    T: Clone

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T[src]

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)[src]

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T, U> TryFrom<U> for T where
    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]

Performs the conversion.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>[src]

Performs the conversion.

impl<T> WithConstness for T[src]

fn with_constness(self, constness: Constness) -> ConstnessAnd<Self>[src]

fn with_const(self) -> ConstnessAnd<Self>[src]

fn without_const(self) -> ConstnessAnd<Self>[src]

impl<'a, T> Captures<'a> for T where
    T: ?Sized