Trait SolverDelegate 

pub trait SolverDelegate: Deref<Target = Self::Infcx> + Sized {
    type Infcx: InferCtxtLike<Interner = Self::Interner>;
    type Interner: Interner;

    // Required methods
    fn build_with_canonical<V>(
        cx: Self::Interner,
        canonical: &CanonicalQueryInput<Self::Interner, V>,
    ) -> (Self, V, CanonicalVarValues<Self::Interner>)
       where V: TypeFoldable<Self::Interner>;
    fn compute_goal_fast_path(
        &self,
        goal: Goal<Self::Interner, <Self::Interner as Interner>::Predicate>,
        span: <Self::Interner as Interner>::Span,
    ) -> ComputeGoalFastPathOutcome<Self::Interner>;
    fn fresh_var_for_kind(
        &self,
        arg: <Self::Interner as Interner>::GenericArg,
        span: <Self::Interner as Interner>::Span,
        universe: UniverseIndex,
    ) -> <Self::Interner as Interner>::GenericArg;
    fn leak_check(
        &self,
        max_input_universe: UniverseIndex,
    ) -> Result<(), NoSolution>;
    fn evaluate_const<E: Debug>(
        &self,
        param_env: <Self::Interner as Interner>::ParamEnv,
        alias_const: AliasConst<Self::Interner>,
        normalize_ty: impl FnOnce(Unnormalized<Self::Interner, <Self::Interner as Interner>::Ty>) -> Result<<Self::Interner as Interner>::Ty, E>,
    ) -> Result<Option<<Self::Interner as Interner>::Const>, E>;
    fn well_formed_goals(
        &self,
        param_env: <Self::Interner as Interner>::ParamEnv,
        term: <Self::Interner as Interner>::Term,
    ) -> Option<Vec<Goal<Self::Interner, <Self::Interner as Interner>::Predicate>>>;
    fn make_deduplicated_region_constraints(
        &self,
    ) -> Vec<(RegionConstraint<Self::Interner>, VisibleForLeakCheck)>;
    fn instantiate_canonical<V>(
        &self,
        canonical: Canonical<Self::Interner, V>,
        values: CanonicalVarValues<Self::Interner>,
    ) -> V
       where V: TypeFoldable<Self::Interner>;
    fn instantiate_canonical_var(
        &self,
        kind: CanonicalVarKind<Self::Interner>,
        span: <Self::Interner as Interner>::Span,
        var_values: &[<Self::Interner as Interner>::GenericArg],
        universe_map: impl Fn(UniverseIndex) -> UniverseIndex,
    ) -> <Self::Interner as Interner>::GenericArg;
    fn add_item_bounds_for_hidden_type(
        &self,
        def_id: <Self::Interner as Interner>::OpaqueTyId,
        args: <Self::Interner as Interner>::GenericArgs,
        param_env: <Self::Interner as Interner>::ParamEnv,
        hidden_ty: <Self::Interner as Interner>::Ty,
        goals: &mut Vec<Goal<Self::Interner, <Self::Interner as Interner>::Predicate>>,
    );
    fn fetch_eligible_assoc_item(
        &self,
        goal_trait_ref: TraitRef<Self::Interner>,
        trait_assoc_def_id: <Self::Interner as Interner>::TraitAssocTermId,
        impl_def_id: <Self::Interner as Interner>::ImplId,
    ) -> FetchEligibleAssocItemResponse<Self::Interner>;
    fn is_transmutable(
        &self,
        src: <Self::Interner as Interner>::Ty,
        dst: <Self::Interner as Interner>::Ty,
        assume: <Self::Interner as Interner>::Const,
    ) -> Result<Certainty, NoSolution>;

    // Provided methods
    fn cx(&self) -> Self::Interner { ... }
    fn obtain_canonicalizer_state(&self) -> CanonicalizerState<Self::Interner> { ... }
    fn release_canonicalizer_state(&self, _: CanonicalizerState<Self::Interner>) { ... }
}

Required Associated Types

type Infcx: InferCtxtLike<Interner = Self::Interner>

type Interner: Interner

Required Methods

fn build_with_canonical<V>( cx: Self::Interner, canonical: &CanonicalQueryInput<Self::Interner, V>, ) -> (Self, V, CanonicalVarValues<Self::Interner>)

where V: TypeFoldable<Self::Interner>,

fn compute_goal_fast_path( &self, goal: Goal<Self::Interner, <Self::Interner as Interner>::Predicate>, span: <Self::Interner as Interner>::Span, ) -> ComputeGoalFastPathOutcome<Self::Interner>

fn fresh_var_for_kind( &self, arg: <Self::Interner as Interner>::GenericArg, span: <Self::Interner as Interner>::Span, universe: UniverseIndex, ) -> <Self::Interner as Interner>::GenericArg

fn leak_check( &self, max_input_universe: UniverseIndex, ) -> Result<(), NoSolution>

fn evaluate_const<E: Debug>( &self, param_env: <Self::Interner as Interner>::ParamEnv, alias_const: AliasConst<Self::Interner>, normalize_ty: impl FnOnce(Unnormalized<Self::Interner, <Self::Interner as Interner>::Ty>) -> Result<<Self::Interner as Interner>::Ty, E>, ) -> Result<Option<<Self::Interner as Interner>::Const>, E>

Evaluate a const, normalizing the type of the resulting value with normalize_ty. Returns Ok(None) if the const is too generic, and Err(_) only if normalize_ty failed.

fn well_formed_goals( &self, param_env: <Self::Interner as Interner>::ParamEnv, term: <Self::Interner as Interner>::Term, ) -> Option<Vec<Goal<Self::Interner, <Self::Interner as Interner>::Predicate>>>

fn make_deduplicated_region_constraints( &self, ) -> Vec<(RegionConstraint<Self::Interner>, VisibleForLeakCheck)>

fn instantiate_canonical<V>( &self, canonical: Canonical<Self::Interner, V>, values: CanonicalVarValues<Self::Interner>, ) -> V

where V: TypeFoldable<Self::Interner>,

fn instantiate_canonical_var( &self, kind: CanonicalVarKind<Self::Interner>, span: <Self::Interner as Interner>::Span, var_values: &[<Self::Interner as Interner>::GenericArg], universe_map: impl Fn(UniverseIndex) -> UniverseIndex, ) -> <Self::Interner as Interner>::GenericArg

fn add_item_bounds_for_hidden_type( &self, def_id: <Self::Interner as Interner>::OpaqueTyId, args: <Self::Interner as Interner>::GenericArgs, param_env: <Self::Interner as Interner>::ParamEnv, hidden_ty: <Self::Interner as Interner>::Ty, goals: &mut Vec<Goal<Self::Interner, <Self::Interner as Interner>::Predicate>>, )

fn fetch_eligible_assoc_item( &self, goal_trait_ref: TraitRef<Self::Interner>, trait_assoc_def_id: <Self::Interner as Interner>::TraitAssocTermId, impl_def_id: <Self::Interner as Interner>::ImplId, ) -> FetchEligibleAssocItemResponse<Self::Interner>

fn is_transmutable( &self, src: <Self::Interner as Interner>::Ty, dst: <Self::Interner as Interner>::Ty, assume: <Self::Interner as Interner>::Const, ) -> Result<Certainty, NoSolution>

Provided Methods

fn cx(&self) -> Self::Interner

fn obtain_canonicalizer_state(&self) -> CanonicalizerState<Self::Interner>

Obtain canonicalizer state, either by allocating it afresh (the default) or by reusing previously allocated state.

fn release_canonicalizer_state(&self, _: CanonicalizerState<Self::Interner>)

Release canonicalizer state, either by deallocating it (the default) or by clearing it and stashing it for later reuse.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors