rustc_next_trait_solver::canonicalizer

Struct Canonicalizer

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pub struct Canonicalizer<'a, D: SolverDelegate<Interner = I>, I: Interner> {
    delegate: &'a D,
    canonicalize_mode: CanonicalizeMode,
    variables: &'a mut Vec<I::GenericArg>,
    primitive_var_infos: Vec<CanonicalVarInfo<I>>,
    variable_lookup_table: HashMap<I::GenericArg, usize>,
    binder_index: DebruijnIndex,
    cache: HashMap<(DebruijnIndex, I::Ty), I::Ty>,
}

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§delegate: &'a D§canonicalize_mode: CanonicalizeMode§variables: &'a mut Vec<I::GenericArg>§primitive_var_infos: Vec<CanonicalVarInfo<I>>§variable_lookup_table: HashMap<I::GenericArg, usize>§binder_index: DebruijnIndex§cache: HashMap<(DebruijnIndex, I::Ty), I::Ty>

We only use the debruijn index during lookup. We don’t need to track the variables as each generic arg only results in a single bound variable regardless of how many times it is encountered.

Implementations§

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impl<'a, D: SolverDelegate<Interner = I>, I: Interner> Canonicalizer<'a, D, I>

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pub fn canonicalize<T: TypeFoldable<I>>( delegate: &'a D, canonicalize_mode: CanonicalizeMode, variables: &'a mut Vec<I::GenericArg>, value: T, ) -> Canonical<I, T>

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fn get_or_insert_bound_var( &mut self, arg: impl Into<I::GenericArg>, canonical_var_info: CanonicalVarInfo<I>, ) -> BoundVar

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fn finalize(self) -> (UniverseIndex, I::CanonicalVars)

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fn cached_fold_ty(&mut self, t: I::Ty) -> I::Ty

Trait Implementations§

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impl<D: SolverDelegate<Interner = I>, I: Interner> TypeFolder<I> for Canonicalizer<'_, D, I>

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fn cx(&self) -> I

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fn fold_binder<T>(&mut self, t: Binder<I, T>) -> Binder<I, T>
where T: TypeFoldable<I>,

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fn fold_region(&mut self, r: I::Region) -> I::Region

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fn fold_ty(&mut self, t: I::Ty) -> I::Ty

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fn fold_const(&mut self, c: I::Const) -> I::Const

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fn fold_predicate( &mut self, p: <I as Interner>::Predicate, ) -> <I as Interner>::Predicate

Auto Trait Implementations§

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impl<'a, D, I> Freeze for Canonicalizer<'a, D, I>
where <D as Deref>::Target: Sized,

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impl<'a, D, I> RefUnwindSafe for Canonicalizer<'a, D, I>

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impl<'a, D, I> Send for Canonicalizer<'a, D, I>

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impl<'a, D, I> Sync for Canonicalizer<'a, D, I>

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impl<'a, D, I> Unpin for Canonicalizer<'a, D, I>

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impl<'a, D, I> !UnwindSafe for Canonicalizer<'a, D, I>

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = _

Alignment of Self.
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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, R> CollectAndApply<T, R> for T

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fn collect_and_apply<I, F>(iter: I, f: F) -> R
where I: Iterator<Item = T>, F: FnOnce(&[T]) -> R,

Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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impl<I, F> FallibleTypeFolder<I> for F
where I: Interner, F: TypeFolder<I>,

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type Error = !

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fn cx(&self) -> I

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fn try_fold_binder<T>(&mut self, t: Binder<I, T>) -> Result<Binder<I, T>, !>
where T: TypeFoldable<I>,

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fn try_fold_ty( &mut self, t: <I as Interner>::Ty, ) -> Result<<I as Interner>::Ty, !>

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fn try_fold_region( &mut self, r: <I as Interner>::Region, ) -> Result<<I as Interner>::Region, !>

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fn try_fold_const( &mut self, c: <I as Interner>::Const, ) -> Result<<I as Interner>::Const, !>

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fn try_fold_predicate( &mut self, p: <I as Interner>::Predicate, ) -> Result<<I as Interner>::Predicate, !>

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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<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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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<I, T, U> Upcast<I, U> for T
where U: UpcastFrom<I, T>,

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fn upcast(self, interner: I) -> U

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impl<I, T> UpcastFrom<I, T> for T

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fn upcast_from(from: T, _tcx: I) -> T

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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
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impl<'a, T> Captures<'a> for T
where T: ?Sized,

Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 112 bytes