rustc_middle::query::erase

# Trait EraseType

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    pub trait EraseType: Copy {
        type Result: Copy;
    }

## Required Associated Types§

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#### type Result: Copy

## Object Safety§

This trait is not object safe.

## Implementations on Foreign Types§

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### impl EraseType for AllocatorKind

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#### type Result = [u8; 1]

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### impl EraseType for DefKind

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#### type Result = [u8; 3]

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### impl EraseType for Constness

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#### type Result = [u8; 1]

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### impl EraseType for CoroutineKind

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#### type Result = [u8; 2]

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### impl EraseType for Defaultness

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#### type Result = [u8; 1]

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### impl EraseType for IsAsync

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#### type Result = [u8; 12]

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### impl EraseType for MaybeOwner<'_>

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#### type Result = [u8; 16]

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### impl EraseType for LangItem

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#### type Result = [u8; 1]

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### impl EraseType for LintExpectationId

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#### type Result = [u8; 16]

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### impl EraseType for CrateType

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#### type Result = [u8; 1]

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### impl EraseType for EntryFnType

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#### type Result = [u8; 2]

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### impl EraseType for OptLevel

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#### type Result = [u8; 1]

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### impl EraseType for SymbolManglingVersion

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#### type Result = [u8; 1]

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### impl EraseType for CrateDepKind

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#### type Result = [u8; 1]

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### impl EraseType for LinkagePreference

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#### type Result = [u8; 1]

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### impl EraseType for PanicStrategy

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#### type Result = [u8; 1]

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### impl EraseType for Option<(DefId, EntryFnType)>

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#### type Result = [u8; 12]

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### impl EraseType for Option<AllocatorKind>

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#### type Result = [u8; 1]

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### impl EraseType for Option<DefKind>

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#### type Result = [u8; 3]

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### impl EraseType for Option<CoroutineKind>

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#### type Result = [u8; 2]

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### impl EraseType for Option<PanicStrategy>

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#### type Result = [u8; 1]

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### impl EraseType for Option<ImplTraitInTraitData>

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#### type Result = [u8; 16]

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### impl EraseType for Option<usize>

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#### type Result = [u8; 16]

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### impl EraseType for Option<ConstStability>

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#### type Result = [u8; 24]

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### impl EraseType for Option<DefaultBodyStability>

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#### type Result = [u8; 20]

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### impl EraseType for Option<Stability>

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#### type Result = [u8; 20]

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### impl EraseType for Option<Svh>

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#### type Result = [u8; 24]

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### impl EraseType for Option<HirId>

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#### type Result = [u8; 8]

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### impl EraseType for Option<CrateNum>

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#### type Result = [u8; 4]

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### impl EraseType for Option<DefId>

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#### type Result = [u8; 8]

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### impl EraseType for Option<LocalDefId>

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#### type Result = [u8; 4]

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### impl EraseType for Option<Span>

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#### type Result = [u8; 12]

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### impl EraseType for Option<FieldIdx>

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#### type Result = [u8; 4]

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### impl EraseType for Option<DeprecationEntry>

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#### type Result = [u8; 20]

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### impl EraseType for Option<DestructuredConstant<'_>>

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#### type Result = [u8; 24]

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### impl EraseType for Option<ScalarInt>

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#### type Result = [u8; 17]

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### impl EraseType for Option<IntrinsicDef>

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#### type Result = [u8; 8]

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### impl EraseType for Option<AsyncDestructor>

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#### type Result = [u8; 16]

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### impl EraseType for Option<Destructor>

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#### type Result = [u8; 12]

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### impl EraseType for Option<ImplTraitHeader<'_>>

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#### type Result = [u8; 24]

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### impl EraseType for Option<EarlyBinder<'_, Ty<'_>>>

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#### type Result = [u8; 8]

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### impl EraseType for Result<&List<Ty<'_>>, AlwaysRequiresDrop>

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#### type Result = [u8; 8]

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### impl EraseType for Result<Const<'_>, LitToConstError>

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#### type Result = [u8; 40]

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### impl EraseType for Result<ConstValue<'_>, ErrorHandled>

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#### type Result = [u8; 24]

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### impl EraseType for Result<EvaluationResult, OverflowError>

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#### type Result = [u8; 2]

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### impl EraseType for Result<Option<Instance<'_>>, ErrorGuaranteed>

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#### type Result = [u8; 32]

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### impl EraseType for Result<Option<EarlyBinder<'_, Const<'_>>>, ErrorGuaranteed>

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#### type Result = [u8; 16]

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### impl EraseType for Result<Result<ValTree<'_>, Ty<'_>>, ErrorHandled>

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#### type Result = [u8; 24]

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### impl EraseType for Result<bool, &LayoutError<'_>>

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#### type Result = [u8; 16]

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### impl EraseType for Result<(), ErrorGuaranteed>

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#### type Result = [u8; 1]

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### impl EraseType for Result<(), NoSolution>

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#### type Result = [u8; 1]

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### impl EraseType for Result<TyAndLayout<'_, Ty<'_>>, &LayoutError<'_>>

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#### type Result = [u8; 16]

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### impl EraseType for Result<ConstAlloc<'_>, ErrorHandled>

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#### type Result = [u8; 24]

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### impl EraseType for Result<CoerceUnsizedInfo, ErrorGuaranteed>

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#### type Result = [u8; 4]

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### impl EraseType for Result<Const<'_>, LitToConstError>

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#### type Result = [u8; 16]

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### impl EraseType for Result<GenericArg<'_>, NoSolution>

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#### type Result = [u8; 8]

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### impl EraseType for Result<EarlyBinder<'_, Ty<'_>>, CyclePlaceholder>

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#### type Result = [u8; 8]

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### impl EraseType for bool

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#### type Result = [u8; 1]

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### impl EraseType for u32

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#### type Result = [u8; 4]

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### impl EraseType for ()

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#### type Result = [u8; 0]

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### impl EraseType for usize

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#### type Result = [u8; 8]

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### impl EraseType for ConstStability

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#### type Result = [u8; 24]

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### impl EraseType for DefaultBodyStability

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#### type Result = [u8; 20]

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### impl EraseType for Deprecation

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#### type Result = [u8; 16]

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### impl EraseType for Stability

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#### type Result = [u8; 20]

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### impl EraseType for Svh

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#### type Result = [u8; 16]

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### impl EraseType for DefKey

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#### type Result = [u8; 16]

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### impl EraseType for Upvar

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#### type Result = [u8; 8]

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### impl EraseType for HirId

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#### type Result = [u8; 8]

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### impl EraseType for ItemLocalId

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#### type Result = [u8; 4]

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### impl EraseType for OwnerId

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#### type Result = [u8; 4]

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### impl EraseType for FiniteBitSet<u32>

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#### type Result = [u8; 4]

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### impl EraseType for ExternCrate

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#### type Result = [u8; 32]

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### impl EraseType for Limits

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#### type Result = [u8; 24]

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### impl EraseType for CrateNum

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#### type Result = [u8; 4]

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### impl EraseType for DefId

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#### type Result = [u8; 8]

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### impl EraseType for DefIndex

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#### type Result = [u8; 4]

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### impl EraseType for DefPathHash

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#### type Result = [u8; 16]

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### impl EraseType for LocalDefId

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#### type Result = [u8; 4]

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### impl EraseType for LocalModDefId

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#### type Result = [u8; 4]

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### impl EraseType for ExpnHash

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#### type Result = [u8; 16]

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### impl EraseType for ExpnId

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#### type Result = [u8; 8]

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### impl EraseType for Span

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#### type Result = [u8; 8]

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### impl EraseType for ErrorGuaranteed

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#### type Result = [u8; 0]

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### impl EraseType for Ident

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#### type Result = [u8; 12]

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### impl EraseType for Symbol

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#### type Result = [u8; 4]

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### impl<I: Idx, T> EraseType for &IndexSlice<I, T>

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#### type Result = [u8; 16]

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### impl<T0> EraseType for (&T0, Result<(), ErrorGuaranteed>)

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#### type Result = [u8; 16]

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### impl<T0, T1> EraseType for (&T0, &[T1])

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#### type Result = [u8; 24]

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### impl<T0, T1> EraseType for (&T0, &T1)

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#### type Result = [u8; 16]

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### impl<T> EraseType for &[T]

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#### type Result = [u8; 16]

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### impl<T> EraseType for Option<&[T]>

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#### type Result = [u8; 16]

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### impl<T> EraseType for Option<&T>

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#### type Result = [u8; 8]

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### impl<T> EraseType for Result<&[T], ErrorGuaranteed>

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#### type Result = [u8; 16]

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### impl<T> EraseType for Result<&[T], NoSolution>

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#### type Result = [u8; 16]

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### impl<T> EraseType for Result<(&T, ExprId), ErrorGuaranteed>

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#### type Result = [u8; 16]

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### impl<T> EraseType for Result<&T, &FnAbiError<'_>>

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#### type Result = [u8; 16]

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### impl<T> EraseType for Result<&T, CodegenObligationError>

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#### type Result = [u8; 16]

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### impl<T> EraseType for Result<&T, ErrorGuaranteed>

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#### type Result = [u8; 8]

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### impl<T> EraseType for Result<&T, NoSolution>

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#### type Result = [u8; 8]

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### impl<T> EraseType for &T

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#### type Result = [u8; 8]

## Implementors§

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### impl EraseType for Linkage

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#### type Result = [u8; 1]

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### impl EraseType for ObjectLifetimeDefault

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#### type Result = [u8; 8]

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### impl EraseType for ResolvedArg

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#### type Result = [u8; 12]

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### impl EraseType for LitToConstError

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#### type Result = [u8; 1]

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### impl EraseType for ErrorHandled

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#### type Result = [u8; 12]

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### impl EraseType for CodegenObligationError

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#### type Result = [u8; 1]

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### impl EraseType for WellFormedLoc

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#### type Result = [u8; 16]

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### impl EraseType for EvaluationResult

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#### type Result = [u8; 1]

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### impl EraseType for OverflowError

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#### type Result = [u8; 1]

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### impl EraseType for Representability

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#### type Result = [u8; 1]

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### impl EraseType for AssocItemContainer

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#### type Result = [u8; 1]

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### impl EraseType for Asyncness

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#### type Result = [u8; 1]

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### impl EraseType for ImplPolarity

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#### type Result = [u8; 1]

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### impl EraseType for Variance

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#### type Result = [u8; 1]

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### impl EraseType for Visibility<DefId>

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#### type Result = [u8; 8]

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### impl EraseType for BoundVariableKind

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#### type Result = [u8; 16]

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### impl EraseType for SymbolExportInfo

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#### type Result = [u8; 3]

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### impl EraseType for DeprecationEntry

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#### type Result = [u8; 20]

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### impl EraseType for CtfeProvenance

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#### type Result = [u8; 8]

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### impl EraseType for AllocId

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#### type Result = [u8; 8]

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### impl EraseType for ConstQualifs

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#### type Result = [u8; 4]

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### impl EraseType for ExprId

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#### type Result = [u8; 4]

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### impl EraseType for CoerceUnsizedInfo

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#### type Result = [u8; 4]

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### impl EraseType for AssocItem

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#### type Result = [u8; 40]

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### impl EraseType for DeducedParamAttrs

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#### type Result = [u8; 1]

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### impl EraseType for UnusedGenericParams

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#### type Result = [u8; 4]

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### impl EraseType for NoSolution

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#### type Result = [u8; 0]

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### impl EraseType for AsyncDestructor

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#### type Result = [u8; 16]

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### impl EraseType for Destructor

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#### type Result = [u8; 12]

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### impl EraseType for ReprOptions

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#### type Result = [u8; 16]

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### impl EraseType for AlwaysRequiresDrop

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#### type Result = [u8; 0]

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### impl EraseType for SimplifiedType

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#### type Result = [u8; 16]

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### impl EraseType for Binder<'_, &List<Ty<'_>>>

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#### type Result = [u8; 16]

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### impl EraseType for Binder<'_, FnSig<'_>>

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#### type Result = [u8; 24]

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### impl<'tcx> EraseType for ExportedSymbol<'tcx>

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#### type Result = [u8; 24]

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### impl<'tcx> EraseType for rustc_middle::mir::consts::Const<'tcx>

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#### type Result = [u8; 40]

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### impl<'tcx> EraseType for ConstValue<'tcx>

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#### type Result = [u8; 24]

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### impl<'tcx> EraseType for ValTree<'tcx>

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#### type Result = [u8; 24]

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### impl<'tcx> EraseType for InhabitedPredicate<'tcx>

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#### type Result = [u8; 16]

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### impl<'tcx> EraseType for InstanceKind<'tcx>

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#### type Result = [u8; 24]

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### impl<'tcx> EraseType for FnAbiError<'tcx>

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#### type Result = [u8; 24]

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### impl<'tcx> EraseType for LayoutError<'tcx>

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#### type Result = [u8; 24]

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### impl<'tcx> EraseType for VtblEntry<'tcx>

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#### type Result = [u8; 32]

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### impl<'tcx> EraseType for ConstAlloc<'tcx>

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#### type Result = [u8; 16]

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### impl<'tcx> EraseType for GlobalId<'tcx>

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#### type Result = [u8; 40]

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### impl<'tcx> EraseType for LitToConstInput<'tcx>

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#### type Result = [u8; 24]

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### impl<'tcx> EraseType for DestructuredConstant<'tcx>

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#### type Result = [u8; 24]

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### impl<'tcx> EraseType for MethodAutoderefStepsResult<'tcx>

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#### type Result = [u8; 32]

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### impl<'tcx> EraseType for AscribeUserType<'tcx>

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#### type Result = [u8; 40]

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### impl<'tcx> EraseType for Eq<'tcx>

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#### type Result = [u8; 16]

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### impl<'tcx> EraseType for ProvePredicate<'tcx>

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#### type Result = [u8; 8]

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### impl<'tcx> EraseType for Subtype<'tcx>

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#### type Result = [u8; 16]

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### impl<'tcx> EraseType for AdtDef<'tcx>

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#### type Result = [u8; 8]

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### impl<'tcx> EraseType for ClosureTypeInfo<'tcx>

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#### type Result = [u8; 64]

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### impl<'tcx> EraseType for rustc_middle::ty::consts::Const<'tcx>

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#### type Result = [u8; 8]

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### impl<'tcx> EraseType for GenericArg<'tcx>

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#### type Result = [u8; 8]

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### impl<'tcx> EraseType for GenericPredicates<'tcx>

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#### type Result = [u8; 32]

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### impl<'tcx> EraseType for Instance<'tcx>

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#### type Result = [u8; 32]

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### impl<'tcx> EraseType for Predicate<'tcx>

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#### type Result = [u8; 8]

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### impl<'tcx> EraseType for DestructuredConst<'tcx>

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#### type Result = [u8; 24]

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### impl<'tcx> EraseType for ParamEnv<'tcx>

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#### type Result = [u8; 8]

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### impl<'tcx> EraseType for SymbolName<'tcx>

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#### type Result = [u8; 16]

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### impl<'tcx> EraseType for Ty<'tcx>

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#### type Result = [u8; 8]

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### impl<'tcx> EraseType for EvalStaticInitializerRawResult<'tcx>

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#### type Result = [u8; 16]

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### impl<'tcx> EraseType for UnevaluatedConst<'tcx>

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#### type Result = [u8; 16]

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### impl<'tcx> EraseType for ClauseKind<'tcx>

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#### type Result = [u8; 32]

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### impl<'tcx> EraseType for ExistentialTraitRef<'tcx>

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#### type Result = [u8; 16]

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### impl<'tcx> EraseType for TraitRef<'tcx>

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#### type Result = [u8; 16]

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### impl<'tcx> EraseType for AliasTy<'tcx>

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#### type Result = [u8; 16]

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### impl<'tcx> EraseType for FnSig<'tcx>

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#### type Result = [u8; 16]

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### impl<T> EraseType for &List<T>

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#### type Result = [u8; 8]

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### impl<T> EraseType for &ListWithCachedTypeInfo<T>

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#### type Result = [u8; 8]

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### impl<T: EraseType> EraseType for EarlyBinder<'_, T>

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#### type Result = <T as EraseType>::Result