Struct rustc_middle::ty::generic_args::UserSelfTy

pub struct UserSelfTy<'tcx> {
    pub impl_def_id: DefId,
    pub self_ty: Ty<'tcx>,
}

Specifies the user-given self type. In the case of a path that refers to a member in an inherent impl, this self type is sometimes needed to constrain the type parameters on the impl. For example, in this code:

struct Foo<T> { }
impl<A> Foo<A> { fn method() { } }

when you then have a path like <Foo<&'static u32>>::method, this struct would carry the DefId of the impl along with the self type Foo<u32>. Then we can instantiate the parameters of the impl (with the args from UserArgs) and apply those to the self type, giving Foo<?A>. Finally, we unify that with the self type here, which contains ?A to be &'static u32

Fields

impl_def_id: DefId

self_ty: Ty<'tcx>

Trait Implementations

impl<'tcx> Clone for UserSelfTy<'tcx>

fn clone(&self) -> UserSelfTy<'tcx>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'tcx> Debug for UserSelfTy<'tcx>

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

Formats the value using the given formatter.

impl<'tcx, __D: TyDecoder<I = TyCtxt<'tcx>>> Decodable<__D> for UserSelfTy<'tcx>

fn decode(__decoder: &mut __D) -> Self

impl<'tcx, __E: TyEncoder<I = TyCtxt<'tcx>>> Encodable<__E> for UserSelfTy<'tcx>

fn encode(&self, __encoder: &mut __E)

impl<'tcx> Hash for UserSelfTy<'tcx>

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

Feeds this value into the given Hasher.

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

Feeds a slice of this type into the given Hasher.

impl<'tcx, '__ctx> HashStable<StableHashingContext<'__ctx>> for UserSelfTy<'tcx>

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

impl<'tcx> PartialEq<UserSelfTy<'tcx>> for UserSelfTy<'tcx>

fn eq(&self, other: &UserSelfTy<'tcx>) -> bool

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

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<'tcx> TypeFoldable<TyCtxt<'tcx>> for UserSelfTy<'tcx>

fn try_fold_with<__F: FallibleTypeFolder<TyCtxt<'tcx>>>( self, __folder: &mut __F ) -> Result<Self, __F::Error>

The entry point for folding. To fold a value t with a folder f call: t.try_fold_with(f).

fn fold_with<F>(self, folder: &mut F) -> Selfwhere F: TypeFolder<I>,

A convenient alternative to try_fold_with for use with infallible folders. Do not override this method, to ensure coherence with try_fold_with.

impl<'tcx> TypeVisitable<TyCtxt<'tcx>> for UserSelfTy<'tcx>

fn visit_with<__V: TypeVisitor<TyCtxt<'tcx>>>( &self, __visitor: &mut __V ) -> ControlFlow<__V::BreakTy>

The entry point for visiting. To visit a value t with a visitor v call: t.visit_with(v).

impl<'tcx> Copy for UserSelfTy<'tcx>

impl<'tcx> Eq for UserSelfTy<'tcx>

impl<'tcx> StructuralEq for UserSelfTy<'tcx>

impl<'tcx> StructuralPartialEq for UserSelfTy<'tcx>

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: 16 bytes