Trait chalk_solve::RustIrDatabase[−][src]

pub trait RustIrDatabase<I: Interner>: Debug {

Show 30 methods    fn custom_clauses(&self) -> Vec<ProgramClause<I>>;

    fn associated_ty_data(
        &self, 
        ty: AssocTypeId<I>
    ) -> Arc<AssociatedTyDatum<I>>;

    fn trait_datum(&self, trait_id: TraitId<I>) -> Arc<TraitDatum<I>>;

    fn adt_datum(&self, adt_id: AdtId<I>) -> Arc<AdtDatum<I>>;

    fn generator_datum(
        &self, 
        generator_id: GeneratorId<I>
    ) -> Arc<GeneratorDatum<I>>;

    fn generator_witness_datum(
        &self, 
        generator_id: GeneratorId<I>
    ) -> Arc<GeneratorWitnessDatum<I>>;

    fn adt_repr(&self, id: AdtId<I>) -> Arc<AdtRepr<I>>;

    fn fn_def_datum(&self, fn_def_id: FnDefId<I>) -> Arc<FnDefDatum<I>>;

    fn impl_datum(&self, impl_id: ImplId<I>) -> Arc<ImplDatum<I>>;

    fn associated_ty_value(
        &self, 
        id: AssociatedTyValueId<I>
    ) -> Arc<AssociatedTyValue<I>>;

    fn opaque_ty_data(&self, id: OpaqueTyId<I>) -> Arc<OpaqueTyDatum<I>>;

    fn hidden_opaque_type(&self, id: OpaqueTyId<I>) -> Ty<I>;

    fn impls_for_trait(
        &self, 
        trait_id: TraitId<I>, 
        parameters: &[GenericArg<I>], 
        binders: &CanonicalVarKinds<I>
    ) -> Vec<ImplId<I>>;

    fn local_impls_to_coherence_check(
        &self, 
        trait_id: TraitId<I>
    ) -> Vec<ImplId<I>>;

    fn impl_provided_for(
        &self, 
        auto_trait_id: TraitId<I>, 
        ty: &TyKind<I>
    ) -> bool;

    fn well_known_trait_id(
        &self, 
        well_known_trait: WellKnownTrait
    ) -> Option<TraitId<I>>;

    fn program_clauses_for_env(
        &self, 
        environment: &Environment<I>
    ) -> ProgramClauses<I>;

    fn interner(&self) -> &I;

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

    fn closure_kind(
        &self, 
        closure_id: ClosureId<I>, 
        substs: &Substitution<I>
    ) -> ClosureKind;

    fn closure_inputs_and_output(
        &self, 
        closure_id: ClosureId<I>, 
        substs: &Substitution<I>
    ) -> Binders<FnDefInputsAndOutputDatum<I>>;

    fn closure_upvars(
        &self, 
        closure_id: ClosureId<I>, 
        substs: &Substitution<I>
    ) -> Binders<Ty<I>>;

    fn closure_fn_substitution(
        &self, 
        closure_id: ClosureId<I>, 
        substs: &Substitution<I>
    ) -> Substitution<I>;

    fn unification_database(&self) -> &dyn UnificationDatabase<I>;

    fn discriminant_type(&self, ty: Ty<I>) -> Ty<I>;

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

    fn adt_name(&self, adt_id: AdtId<I>) -> String { ... }

    fn assoc_type_name(&self, assoc_ty_id: AssocTypeId<I>) -> String { ... }

    fn opaque_type_name(&self, opaque_ty_id: OpaqueTyId<I>) -> String { ... }

    fn fn_def_name(&self, fn_def_id: FnDefId<I>) -> String { ... }

}
Expand description

Trait representing access to a database of rust types.

*_name methods

This trait has a number of *_name methods with default implementations. These are used in the implementation for LoggingRustIrDatabase, so that when printing .chalk files equivalent to the data used, we can use real names.

The default implementations simply fall back to calling Interner debug methods, and printing "UnknownN" (where N is the demultiplexing integer) if those methods return None.

The display::sanitize_debug_name utility is used in the default implementations, and might be useful when providing custom implementations.

Required methods

Returns any “custom program clauses” that do not derive from Rust IR. Used only in testing the underlying solver.

Returns the datum for the associated type with the given id.

Returns the datum for the definition with the given id.

Returns the datum for the ADT with the given id.

Returns the generator datum for the generator with the given id.

Returns the generator witness datum for the generator with the given id.

Returns the representation for the ADT definition with the given id.

Returns the datum for the fn definition with the given id.

Returns the datum for the impl with the given id.

Returns the AssociatedTyValue with the given id.

Returns the OpaqueTyDatum with the given id.

Returns the “hidden type” corresponding with the opaque type.

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.

The binders are for the parameters; if the recursive solver is used, the parameters can contain bound variables referring to these binders.

Returns the impls that require coherence checking. This is not the full set of impls that exist:

  • It can exclude impls not defined in the current crate.
  • It can exclude “built-in” impls, like those for closures; only the impls actually written by users need to be checked.

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).

Returns id of a trait lang item, if found

Calculates program clauses from an env. This is intended to call the program_clauses_for_env function and then possibly cache the clauses.

Check if a trait is object safe

Gets the ClosureKind for a given closure and substitution.

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).

Gets the upvars as a Ty for a given closure id and substitution. There are no restrictions on the type of upvars.

Gets the substitution for the closure when used as a function. For example, for the following (not-quite-)rust code:

ⓘ
let foo = |a: &mut u32| { a += 1; };
let c: &'a u32 = &0;
foo(c);

This would return a Substitution of [&'a]. This could either be substituted into the inputs and output, or into the upvars.

Provided methods

Retrieves a trait’s original name. No uniqueness guarantees, but must a valid Rust identifier.

Retrieves a struct’s original name. No uniqueness guarantees, but must a valid Rust identifier.

Retrieves the name of an associated type. No uniqueness guarantees, but must a valid Rust identifier.

Retrieves the name of an opaque type. No uniqueness guarantees, but must a valid Rust identifier.

Retrieves the name of a function definition. No uniqueness guarantees, but must a valid Rust identifier.

Implementors