# Struct rustc_resolve::late::DiagMetadata

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    struct DiagMetadata<'ast> {Show 21 fields
        current_trait_assoc_items: Option<&'ast [P<AssocItem>]>,
        current_self_type: Option<Ty>,
        current_self_item: Option<NodeId>,
        current_item: Option<&'ast Item>,
        currently_processing_generic_args: bool,
        current_function: Option<(FnKind<'ast>, Span)>,
        unused_labels: FxHashMap<NodeId, Span>,
        current_block_could_be_bare_struct_literal: Option<Span>,
        current_let_binding: Option<(Span, Option<Span>, Option<Span>)>,
        current_pat: Option<&'ast Pat>,
        in_if_condition: Option<&'ast Expr>,
        in_assignment: Option<&'ast Expr>,
        is_assign_rhs: bool,
        in_non_gat_assoc_type: Option<bool>,
        in_range: Option<(&'ast Expr, &'ast Expr)>,
        current_trait_object: Option<&'ast [GenericBound]>,
        current_where_predicate: Option<&'ast WherePredicate>,
        current_type_path: Option<&'ast Ty>,
        current_impl_items: Option<&'ast [P<AssocItem>]>,
        currently_processing_impl_trait: Option<(TraitRef, Ty)>,
        current_elision_failures: Vec<MissingLifetime>,
    }

## Fields§

§`current_trait_assoc_items: Option<&'ast [P<AssocItem>]>`

The current trait’s associated items’ ident, used for diagnostic suggestions.

§`current_self_type: Option<Ty>`

The current self type if inside an impl (used for better errors).

§`current_self_item: Option<NodeId>`

The current self item if inside an ADT (used for better errors).

§`current_item: Option<&'ast Item>`

The current trait (used to suggest).

§`currently_processing_generic_args: bool`

When processing generic arguments and encountering an unresolved ident not found, suggest introducing a type or const param depending on the context.

§`current_function: Option<(FnKind<'ast>, Span)>`

The current enclosing (non-closure) function (used for better errors).

§`unused_labels: FxHashMap<NodeId, Span>`

A list of labels as of yet unused. Labels will be removed from this map when they are used (in a `break` or `continue` statement)

§`current_block_could_be_bare_struct_literal: Option<Span>`

Only used for better errors on `let x = { foo: bar };`. In the case of a parse error with `let x = { foo: bar, };`, this isn’t needed, it’s only needed for cases where this parses as a correct type ascription.

§`current_let_binding: Option<(Span, Option<Span>, Option<Span>)>`

Only used for better errors on `let <pat>: <expr, not type>;`.

§`current_pat: Option<&'ast Pat>`§`in_if_condition: Option<&'ast Expr>`

Used to detect possible `if let` written without `let` and to provide structured suggestion.

§`in_assignment: Option<&'ast Expr>`

Used to detect possible new binding written without `let` and to provide structured suggestion.

§`is_assign_rhs: bool`§`in_non_gat_assoc_type: Option<bool>`

If we are setting an associated type in trait impl, is it a non-GAT type?

§`in_range: Option<(&'ast Expr, &'ast Expr)>`

Used to detect possible `.` -> `..` typo when calling methods.

§`current_trait_object: Option<&'ast [GenericBound]>`

If we are currently in a trait object definition. Used to point at the bounds when encountering a struct or enum.

§`current_where_predicate: Option<&'ast WherePredicate>`

Given `where <T as Bar>::Baz: String`, suggest `where T: Bar<Baz = String>`.

§`current_type_path: Option<&'ast Ty>`§`current_impl_items: Option<&'ast [P<AssocItem>]>`

The current impl items (used to suggest).

§`currently_processing_impl_trait: Option<(TraitRef, Ty)>`

When processing impl trait

§`current_elision_failures: Vec<MissingLifetime>`

Accumulate the errors due to missed lifetime elision, and report them all at once for each function.

## Trait Implementations§

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### impl<'ast> Default for DiagMetadata<'ast>

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#### fn default() -> DiagMetadata<'ast>

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

## Auto Trait Implementations§

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### impl<'ast> DynSend for DiagMetadata<'ast>

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### impl<'ast> DynSync for DiagMetadata<'ast>

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### impl<'ast> Freeze for DiagMetadata<'ast>

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### impl<'ast> !RefUnwindSafe for DiagMetadata<'ast>

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### impl<'ast> !Send for DiagMetadata<'ast>

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### impl<'ast> !Sync for DiagMetadata<'ast>

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### impl<'ast> Unpin for DiagMetadata<'ast>

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### impl<'ast> !UnwindSafe for DiagMetadata<'ast>

## 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> Filterable for T

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

Creates a filterable data provider with the given name for debugging. Read more
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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<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<T> Pointable for T

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#### const ALIGN: usize = _

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. 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<V, T> VZip<V> for T
where V: MultiLane<T>,

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#### fn vzip(self) -> V

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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

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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,

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### impl<T> ErasedDestructor for T
where T: 'static,

## 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: 440 bytes