Trait InferCtxtLike

pub trait InferCtxtLike: Sized {
    type Interner: Interner;

    // Required methods
    fn cx(&self) -> Self::Interner;
    fn typing_mode(
        &self,
        param_env_for_debug_assertion: <Self::Interner as Interner>::ParamEnv,
    ) -> TypingMode<Self::Interner>;
    fn universe(&self) -> UniverseIndex;
    fn create_next_universe(&self) -> UniverseIndex;
    fn universe_of_ty(&self, ty: TyVid) -> Option<UniverseIndex>;
    fn universe_of_lt(&self, lt: RegionVid) -> Option<UniverseIndex>;
    fn universe_of_ct(&self, ct: ConstVid) -> Option<UniverseIndex>;
    fn root_ty_var(&self, var: TyVid) -> TyVid;
    fn root_const_var(&self, var: ConstVid) -> ConstVid;
    fn opportunistic_resolve_ty_var(
        &self,
        vid: TyVid,
    ) -> <Self::Interner as Interner>::Ty;
    fn opportunistic_resolve_int_var(
        &self,
        vid: IntVid,
    ) -> <Self::Interner as Interner>::Ty;
    fn opportunistic_resolve_float_var(
        &self,
        vid: FloatVid,
    ) -> <Self::Interner as Interner>::Ty;
    fn opportunistic_resolve_ct_var(
        &self,
        vid: ConstVid,
    ) -> <Self::Interner as Interner>::Const;
    fn opportunistic_resolve_lt_var(
        &self,
        vid: RegionVid,
    ) -> <Self::Interner as Interner>::Region;
    fn next_ty_infer(&self) -> <Self::Interner as Interner>::Ty;
    fn next_const_infer(&self) -> <Self::Interner as Interner>::Const;
    fn fresh_args_for_item(
        &self,
        def_id: <Self::Interner as Interner>::DefId,
    ) -> <Self::Interner as Interner>::GenericArgs;
    fn instantiate_binder_with_infer<T: TypeFoldable<Self::Interner> + Copy>(
        &self,
        value: Binder<Self::Interner, T>,
    ) -> T;
    fn enter_forall<T: TypeFoldable<Self::Interner> + Copy, U>(
        &self,
        value: Binder<Self::Interner, T>,
        f: impl FnOnce(T) -> U,
    ) -> U;
    fn equate_ty_vids_raw(&self, a: TyVid, b: TyVid);
    fn equate_int_vids_raw(&self, a: IntVid, b: IntVid);
    fn equate_float_vids_raw(&self, a: FloatVid, b: FloatVid);
    fn equate_const_vids_raw(&self, a: ConstVid, b: ConstVid);
    fn instantiate_ty_var_raw<R: PredicateEmittingRelation<Self>>(
        &self,
        relation: &mut R,
        target_is_expected: bool,
        target_vid: TyVid,
        instantiation_variance: Variance,
        source_ty: <Self::Interner as Interner>::Ty,
    ) -> RelateResult<Self::Interner, ()>;
    fn instantiate_int_var_raw(&self, vid: IntVid, value: IntVarValue);
    fn instantiate_float_var_raw(&self, vid: FloatVid, value: FloatVarValue);
    fn instantiate_const_var_raw<R: PredicateEmittingRelation<Self>>(
        &self,
        relation: &mut R,
        target_is_expected: bool,
        target_vid: ConstVid,
        source_ct: <Self::Interner as Interner>::Const,
    ) -> RelateResult<Self::Interner, ()>;
    fn set_tainted_by_errors(
        &self,
        e: <Self::Interner as Interner>::ErrorGuaranteed,
    );
    fn shallow_resolve(
        &self,
        ty: <Self::Interner as Interner>::Ty,
    ) -> <Self::Interner as Interner>::Ty;
    fn shallow_resolve_const(
        &self,
        ty: <Self::Interner as Interner>::Const,
    ) -> <Self::Interner as Interner>::Const;
    fn resolve_vars_if_possible<T>(&self, value: T) -> T
       where T: TypeFoldable<Self::Interner>;
    fn probe<T>(&self, probe: impl FnOnce() -> T) -> T;
    fn sub_regions(
        &self,
        sub: <Self::Interner as Interner>::Region,
        sup: <Self::Interner as Interner>::Region,
    );
    fn equate_regions(
        &self,
        a: <Self::Interner as Interner>::Region,
        b: <Self::Interner as Interner>::Region,
    );
    fn register_ty_outlives(
        &self,
        ty: <Self::Interner as Interner>::Ty,
        r: <Self::Interner as Interner>::Region,
    );

    // Provided method
    fn next_trait_solver(&self) -> bool { ... }
}

Required Associated Types

type Interner: Interner

Required Methods

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

fn typing_mode( &self, param_env_for_debug_assertion: <Self::Interner as Interner>::ParamEnv, ) -> TypingMode<Self::Interner>

fn universe(&self) -> UniverseIndex

fn create_next_universe(&self) -> UniverseIndex

fn universe_of_ty(&self, ty: TyVid) -> Option<UniverseIndex>

fn universe_of_lt(&self, lt: RegionVid) -> Option<UniverseIndex>

fn universe_of_ct(&self, ct: ConstVid) -> Option<UniverseIndex>

fn root_ty_var(&self, var: TyVid) -> TyVid

fn root_const_var(&self, var: ConstVid) -> ConstVid

fn opportunistic_resolve_ty_var( &self, vid: TyVid, ) -> <Self::Interner as Interner>::Ty

fn opportunistic_resolve_int_var( &self, vid: IntVid, ) -> <Self::Interner as Interner>::Ty

fn opportunistic_resolve_float_var( &self, vid: FloatVid, ) -> <Self::Interner as Interner>::Ty

fn opportunistic_resolve_ct_var( &self, vid: ConstVid, ) -> <Self::Interner as Interner>::Const

fn opportunistic_resolve_lt_var( &self, vid: RegionVid, ) -> <Self::Interner as Interner>::Region

fn next_ty_infer(&self) -> <Self::Interner as Interner>::Ty

fn next_const_infer(&self) -> <Self::Interner as Interner>::Const

fn fresh_args_for_item( &self, def_id: <Self::Interner as Interner>::DefId, ) -> <Self::Interner as Interner>::GenericArgs

fn instantiate_binder_with_infer<T: TypeFoldable<Self::Interner> + Copy>( &self, value: Binder<Self::Interner, T>, ) -> T

fn enter_forall<T: TypeFoldable<Self::Interner> + Copy, U>( &self, value: Binder<Self::Interner, T>, f: impl FnOnce(T) -> U, ) -> U

fn equate_ty_vids_raw(&self, a: TyVid, b: TyVid)

fn equate_int_vids_raw(&self, a: IntVid, b: IntVid)

fn equate_float_vids_raw(&self, a: FloatVid, b: FloatVid)

fn equate_const_vids_raw(&self, a: ConstVid, b: ConstVid)

fn instantiate_ty_var_raw<R: PredicateEmittingRelation<Self>>( &self, relation: &mut R, target_is_expected: bool, target_vid: TyVid, instantiation_variance: Variance, source_ty: <Self::Interner as Interner>::Ty, ) -> RelateResult<Self::Interner, ()>

fn instantiate_int_var_raw(&self, vid: IntVid, value: IntVarValue)

fn instantiate_float_var_raw(&self, vid: FloatVid, value: FloatVarValue)

fn instantiate_const_var_raw<R: PredicateEmittingRelation<Self>>( &self, relation: &mut R, target_is_expected: bool, target_vid: ConstVid, source_ct: <Self::Interner as Interner>::Const, ) -> RelateResult<Self::Interner, ()>

fn set_tainted_by_errors( &self, e: <Self::Interner as Interner>::ErrorGuaranteed, )

fn shallow_resolve( &self, ty: <Self::Interner as Interner>::Ty, ) -> <Self::Interner as Interner>::Ty

fn shallow_resolve_const( &self, ty: <Self::Interner as Interner>::Const, ) -> <Self::Interner as Interner>::Const

fn resolve_vars_if_possible<T>(&self, value: T) -> T

where T: TypeFoldable<Self::Interner>,

fn probe<T>(&self, probe: impl FnOnce() -> T) -> T

fn sub_regions( &self, sub: <Self::Interner as Interner>::Region, sup: <Self::Interner as Interner>::Region, )

fn equate_regions( &self, a: <Self::Interner as Interner>::Region, b: <Self::Interner as Interner>::Region, )

fn register_ty_outlives( &self, ty: <Self::Interner as Interner>::Ty, r: <Self::Interner as Interner>::Region, )

Provided Methods

fn next_trait_solver(&self) -> bool

Whether the new trait solver is enabled. This only exists because rustc shares code between the new and old trait solvers; for all other users, this should always be true. If this is unknowingly false and you try to use the new trait solver, things will break badly.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors