Struct rustc_infer::infer::canonical::CanonicalParamEnvCache

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

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§map: Lock<HashMap<ParamEnv<'tcx>, (Canonical<TyCtxt<'tcx>, ParamEnv<'tcx>>, &'tcx [GenericArg<'tcx>]), BuildHasherDefault<FxHasher>>>

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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<TyCtxt<'tcx>, ParamEnv<'tcx>>, ) -> Canonical<TyCtxt<'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.

Trait Implementations§

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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> !Freeze for CanonicalParamEnvCache<'tcx>

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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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where T: ?Sized,

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fn borrow(&self) -> &T

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fn collect_and_apply<I, F>(iter: I, f: F) -> R
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Equivalent to f(&iter.collect::<Vec<_>>()).

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type Output = R

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fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(_: DataRequest<'_>) -> bool>

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impl<P> IntoQueryParam<P> for P

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

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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