pub struct StubWrapper<'a, DB> {
    db: &'a DB,
}

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§db: &'a DB

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impl<'a, DB> StubWrapper<'a, DB>

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pub fn new(db: &'a DB) -> Self

Trait Implementations§

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impl<'a, DB: Debug> Debug for StubWrapper<'a, DB>

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

Formats the value using the given formatter. Read more
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impl<I: Interner, DB: RustIrDatabase<I>> RustIrDatabase<I> for StubWrapper<'_, DB>

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fn custom_clauses(&self) -> Vec<ProgramClause<I>>

Returns any “custom program clauses” that do not derive from Rust IR. Used only in testing the underlying solver.
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fn associated_ty_data(&self, ty: AssocTypeId<I>) -> Arc<AssociatedTyDatum<I>>

Returns the datum for the associated type with the given id.
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fn trait_datum(&self, trait_id: TraitId<I>) -> Arc<TraitDatum<I>>

Returns the datum for the definition with the given id.
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fn adt_datum(&self, adt_id: AdtId<I>) -> Arc<AdtDatum<I>>

Returns the datum for the ADT with the given id.
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fn adt_repr(&self, id: AdtId<I>) -> Arc<AdtRepr<I>>

Returns the representation for the ADT definition with the given id.
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fn adt_size_align(&self, id: AdtId<I>) -> Arc<AdtSizeAlign>

Returns the siza and alignment of the ADT definition with the given id.
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fn fn_def_datum(&self, fn_def_id: FnDefId<I>) -> Arc<FnDefDatum<I>>

Returns the datum for the fn definition with the given id.
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fn impl_datum(&self, _impl_id: ImplId<I>) -> Arc<ImplDatum<I>>

Returns the datum for the impl with the given id.
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fn associated_ty_value( &self, _id: AssociatedTyValueId<I> ) -> Arc<AssociatedTyValue<I>>

Returns the AssociatedTyValue with the given id.
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fn opaque_ty_data(&self, id: OpaqueTyId<I>) -> Arc<OpaqueTyDatum<I>>

Returns the OpaqueTyDatum with the given id.
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fn hidden_opaque_type(&self, _id: OpaqueTyId<I>) -> Ty<I>

Returns the “hidden type” corresponding with the opaque type.
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fn impls_for_trait( &self, _trait_id: TraitId<I>, _parameters: &[GenericArg<I>], _binders: &CanonicalVarKinds<I> ) -> Vec<ImplId<I>>

Returns a list of potentially relevant impls for a given trait-id; we also supply the type parameters that we are trying to match (if known: these parameters may contain inference variables, for example). The implementor is permitted to return any superset of the applicable impls; chalk will narrow down the list to only those that truly apply. The parameters are provided as a “hint” to help the implementor do less work, but can be completely ignored if desired. Read more
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fn local_impls_to_coherence_check(&self, trait_id: TraitId<I>) -> Vec<ImplId<I>>

Returns the impls that require coherence checking. This is not the full set of impls that exist: Read more
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fn impl_provided_for(&self, _auto_trait_id: TraitId<I>, _ty: &TyKind<I>) -> bool

Returns true if there is an explicit impl of the auto trait auto_trait_id for the type ty. This is part of the auto trait handling – if there is no explicit impl given by the user for ty, then we provide default impls (otherwise, we rely on the impls the user gave).
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fn well_known_trait_id( &self, well_known_trait: WellKnownTrait ) -> Option<TraitId<I>>

Returns id of a trait lang item, if found
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fn program_clauses_for_env( &self, environment: &Environment<I> ) -> ProgramClauses<I>

Calculates program clauses from an env. This is intended to call the program_clauses_for_env function and then possibly cache the clauses.
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fn interner(&self) -> I

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fn is_object_safe(&self, trait_id: TraitId<I>) -> bool

Check if a trait is object safe
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fn closure_kind( &self, _closure_id: ClosureId<I>, _substs: &Substitution<I> ) -> ClosureKind

Gets the ClosureKind for a given closure and substitution.
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fn closure_inputs_and_output( &self, _closure_id: ClosureId<I>, _substs: &Substitution<I> ) -> Binders<FnDefInputsAndOutputDatum<I>>

Gets the inputs and output for a given closure id and substitution. We pass both the ClosureId and it’s Substituion to give implementors the freedom to store associated data in the substitution (like rustc) or separately (like chalk-integration).
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fn closure_upvars( &self, _closure_id: ClosureId<I>, _substs: &Substitution<I> ) -> Binders<Ty<I>>

Gets the upvars as a Ty for a given closure id and substitution. There are no restrictions on the type of upvars.
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fn coroutine_datum( &self, _coroutine_id: CoroutineId<I> ) -> Arc<CoroutineDatum<I>>

Returns the coroutine datum for the coroutine with the given id.
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fn coroutine_witness_datum( &self, _coroutine_id: CoroutineId<I> ) -> Arc<CoroutineWitnessDatum<I>>

Returns the coroutine witness datum for the coroutine with the given id.
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fn closure_fn_substitution( &self, _closure_id: ClosureId<I>, _substs: &Substitution<I> ) -> Substitution<I>

Gets the substitution for the closure when used as a function. For example, for the following (not-quite-)rust code: Read more
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fn unification_database(&self) -> &dyn UnificationDatabase<I>

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fn trait_name(&self, trait_id: TraitId<I>) -> String

Retrieves a trait’s original name. No uniqueness guarantees, but must a valid Rust identifier.
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fn adt_name(&self, struct_id: AdtId<I>) -> String

Retrieves a struct’s original name. No uniqueness guarantees, but must a valid Rust identifier.
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fn assoc_type_name(&self, assoc_ty_id: AssocTypeId<I>) -> String

Retrieves the name of an associated type. No uniqueness guarantees, but must a valid Rust identifier.
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fn opaque_type_name(&self, opaque_ty_id: OpaqueTyId<I>) -> String

Retrieves the name of an opaque type. No uniqueness guarantees, but must a valid Rust identifier.
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fn fn_def_name(&self, fn_def_id: FnDefId<I>) -> String

Retrieves the name of a function definition. No uniqueness guarantees, but must a valid Rust identifier.
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fn discriminant_type(&self, ty: Ty<I>) -> Ty<I>

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impl<I: Interner, DB: RustIrDatabase<I>> UnificationDatabase<I> for StubWrapper<'_, DB>

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fn fn_def_variance(&self, fn_def_id: FnDefId<I>) -> Variances<I>

Gets the variances for the substitution of a fn def
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fn adt_variance(&self, adt_id: AdtId<I>) -> Variances<I>

Gets the variances for the substitution of a adt

Auto Trait Implementations§

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impl<'a, DB> RefUnwindSafe for StubWrapper<'a, DB>
where DB: RefUnwindSafe,

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impl<'a, DB> Send for StubWrapper<'a, DB>
where DB: Sync,

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impl<'a, DB> Sync for StubWrapper<'a, DB>
where DB: Sync,

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impl<'a, DB> Unpin for StubWrapper<'a, DB>

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impl<'a, DB> UnwindSafe for StubWrapper<'a, DB>
where DB: RefUnwindSafe,

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> Cast for T

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fn cast<U>(self, interner: <U as HasInterner>::Interner) -> U
where Self: CastTo<U>, U: HasInterner,

Cast a value to type U using CastTo.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<DB, I> Split<I> for DB
where DB: RustIrDatabase<I> + ?Sized, I: Interner,

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fn split_projection<'p>( &self, projection: &'p ProjectionTy<I> ) -> (Arc<AssociatedTyDatum<I>>, &'p [GenericArg<I>], &'p [GenericArg<I>])

Given a projection of an associated type, split the type parameters into those that come from the trait and those that come from the associated type itself. So e.g. if you have (Iterator::Item)<F>, this would return ([F], []), since Iterator::Item is not generic and hence doesn’t have any type parameters itself.
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fn trait_parameters_from_projection<'p>( &self, projection: &'p ProjectionTy<I> ) -> &'p [GenericArg<I>]

Given a projection <P0 as Trait<P1..Pn>>::Item<Pn..Pm>, returns the trait parameters [P0..Pn] (see split_projection).
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fn trait_ref_from_projection(&self, projection: &ProjectionTy<I>) -> TraitRef<I>

Given a projection <P0 as Trait<P1..Pn>>::Item<Pn..Pm>, returns the trait parameters [P0..Pn] (see split_projection).
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fn split_associated_ty_value_parameters<'p, P>( &self, parameters: &'p [P], associated_ty_value: &AssociatedTyValue<I> ) -> (&'p [P], &'p [P])

Given the full set of parameters (or binders) for an associated type value (which appears in an impl), splits them into the substitutions for the impl and those for the associated type. Read more
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fn impl_parameters_and_projection_from_associated_ty_value<'p>( &self, parameters: &'p [GenericArg<I>], associated_ty_value: &AssociatedTyValue<I> ) -> (&'p [GenericArg<I>], ProjectionTy<I>)

Given the full set of parameters for an associated type value (which appears in an impl), returns the trait reference and projection that are being satisfied by that value. Read more
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fn split_associated_ty_parameters<'p, P>( &self, parameters: &'p [P], associated_ty_datum: &AssociatedTyDatum<I> ) -> (&'p [P], &'p [P])

Given the full set of parameters (or binders) for an associated type datum (the one appearing in a trait), splits them into the parameters for the trait and those for the associated type. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more