Trait TypeRelation 

pub trait TypeRelation<I: Interner>: Sized {
    // Required methods
    fn cx(&self) -> I;
    fn relate_ty_args(
        &mut self,
        a_ty: I::Ty,
        b_ty: I::Ty,
        ty_def_id: I::DefId,
        a_arg: I::GenericArgs,
        b_arg: I::GenericArgs,
        mk: impl FnOnce(I::GenericArgs) -> I::Ty,
    ) -> RelateResult<I, I::Ty>;
    fn relate_with_variance<T: Relate<I>>(
        &mut self,
        variance: Variance,
        info: VarianceDiagInfo<I>,
        a: T,
        b: T,
    ) -> RelateResult<I, T>;
    fn tys(&mut self, a: I::Ty, b: I::Ty) -> RelateResult<I, I::Ty>;
    fn regions(
        &mut self,
        a: I::Region,
        b: I::Region,
    ) -> RelateResult<I, I::Region>;
    fn consts(&mut self, a: I::Const, b: I::Const) -> RelateResult<I, I::Const>;
    fn binders<T>(
        &mut self,
        a: Binder<I, T>,
        b: Binder<I, T>,
    ) -> RelateResult<I, Binder<I, T>>
       where T: Relate<I>;

    // Provided method
    fn relate<T: Relate<I>>(&mut self, a: T, b: T) -> RelateResult<I, T> { ... }
}

Required Methods

fn cx(&self) -> I

fn relate_ty_args( &mut self, a_ty: I::Ty, b_ty: I::Ty, ty_def_id: I::DefId, a_arg: I::GenericArgs, b_arg: I::GenericArgs, mk: impl FnOnce(I::GenericArgs) -> I::Ty, ) -> RelateResult<I, I::Ty>

fn relate_with_variance<T: Relate<I>>( &mut self, variance: Variance, info: VarianceDiagInfo<I>, a: T, b: T, ) -> RelateResult<I, T>

Switch variance for the purpose of relating a and b.

fn tys(&mut self, a: I::Ty, b: I::Ty) -> RelateResult<I, I::Ty>

fn regions(&mut self, a: I::Region, b: I::Region) -> RelateResult<I, I::Region>

fn consts(&mut self, a: I::Const, b: I::Const) -> RelateResult<I, I::Const>

fn binders<T>( &mut self, a: Binder<I, T>, b: Binder<I, T>, ) -> RelateResult<I, Binder<I, T>>

where T: Relate<I>,

Provided Methods

fn relate<T: Relate<I>>(&mut self, a: T, b: T) -> RelateResult<I, T>

Generic relation routine suitable for most anything.

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

impl<Infcx, I> TypeRelation<I> for SolverRelating<'_, Infcx, I>

where Infcx: InferCtxtLike<Interner = I>, I: Interner,