Struct rustc_middle::infer::canonical::CanonicalParamEnvCache

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pub struct CanonicalParamEnvCache<'tcx> {
    map: Lock<FxHashMap<ParamEnv<'tcx>, (Canonical<'tcx, ParamEnv<'tcx>>, &'tcx [GenericArg<'tcx>])>>,
}

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§map: Lock<FxHashMap<ParamEnv<'tcx>, (Canonical<'tcx, ParamEnv<'tcx>>, &'tcx [GenericArg<'tcx>])>>

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impl<'tcx> CanonicalParamEnvCache<'tcx>

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pub fn get_or_insert( &self, tcx: TyCtxt<'tcx>, key: ParamEnv<'tcx>, state: &mut OriginalQueryValues<'tcx>, canonicalize_op: fn(_: TyCtxt<'tcx>, _: ParamEnv<'tcx>, _: &mut OriginalQueryValues<'tcx>) -> Canonical<'tcx, ParamEnv<'tcx>> ) -> Canonical<'tcx, ParamEnv<'tcx>>

Gets the cached canonical form of key or executes canonicalize_op and caches the result if not present.

canonicalize_op is intentionally not allowed to be a closure to statically prevent it from capturing InferCtxt and resolving inference variables, which invalidates the cache.

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impl<'tcx> Default for CanonicalParamEnvCache<'tcx>

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fn default() -> CanonicalParamEnvCache<'tcx>

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl<'tcx> !RefUnwindSafe for CanonicalParamEnvCache<'tcx>

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impl<'tcx> Send for CanonicalParamEnvCache<'tcx>

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impl<'tcx> !Sync for CanonicalParamEnvCache<'tcx>

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impl<'tcx> Unpin for CanonicalParamEnvCache<'tcx>

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impl<'tcx> !UnwindSafe for CanonicalParamEnvCache<'tcx>

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<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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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<P> IntoQueryParam<P> for P

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fn into_query_param(self) -> P

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impl<T> MaybeResult<T> for T

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type Error = !

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fn from(_: Result<T, <T as MaybeResult<T>>::Error>) -> T

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fn to_result(self) -> Result<T, <T as MaybeResult<T>>::Error>

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impl<'tcx, T> ToPredicate<'tcx, T> for T

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fn to_predicate(self, _tcx: TyCtxt<'tcx>) -> T

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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<Tcx, T> Value<Tcx> for T
where Tcx: DepContext,

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default fn from_cycle_error( tcx: Tcx, cycle_error: &CycleError, _guar: ErrorGuaranteed ) -> T

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: 40 bytes