Struct SharedContext

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pub(crate) struct SharedContext<'p, 'sess, S: Stage> {
    pub(crate) cx: &'p mut AttributeParser<'sess, S>,
    pub(crate) target_span: Span,
    pub(crate) target_id: S::Id,
    emit_lint: &'p mut dyn FnMut(AttributeLint<S::Id>),
}
Expand description

Context given to every attribute parser during finalization.

Gives AttributeParsers enough information to create errors, for example.

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§cx: &'p mut AttributeParser<'sess, S>

The parse context, gives access to the session and the diagnostics context.

§target_span: Span

The span of the syntactical component this attribute was applied to

§target_id: S::Id

The id (NodeId if S is Early, HirId if S is Late) of the syntactical component this attribute was applied to

§emit_lint: &'p mut dyn FnMut(AttributeLint<S::Id>)

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impl<'f, 'sess: 'f, S: Stage> SharedContext<'f, 'sess, S>

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pub(crate) fn emit_err( &self, diag: impl for<'x> Diagnostic<'x>, ) -> ErrorGuaranteed

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pub(crate) fn emit_lint(&mut self, lint: AttributeLintKind, span: Span)

Emit a lint. This method is somewhat special, since lints emitted during attribute parsing must be delayed until after HIR is built. This method will take care of the details of that.

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pub(crate) fn warn_unused_duplicate( &mut self, used_span: Span, unused_span: Span, )

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pub(crate) fn warn_unused_duplicate_future_error( &mut self, used_span: Span, unused_span: Span, )

Methods from Deref<Target = AttributeParser<'sess, S>>§

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pub(crate) fn sess(&self) -> &'sess Session

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pub(crate) fn features(&self) -> &'sess Features

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pub(crate) fn dcx(&self) -> DiagCtxtHandle<'sess>

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pub fn parse_attribute_list( &mut self, attrs: &[Attribute], target_span: Span, target_id: S::Id, omit_doc: OmitDoc, lower_span: impl Copy + Fn(Span) -> Span, emit_lint: impl FnMut(AttributeLint<S::Id>), ) -> Vec<Attribute>

Parse a list of attributes.

target_span is the span of the thing this list of attributes is applied to, and when omit_doc is set, doc attributes are filtered out.

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fn lower_attr_args( &self, args: &AttrArgs, lower_span: impl Fn(Span) -> Span, ) -> AttrArgs

Trait Implementations§

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impl<'p, 'sess: 'p, S: Stage> Deref for SharedContext<'p, 'sess, S>

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type Target = AttributeParser<'sess, S>

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.
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impl<'p, 'sess: 'p, S: Stage> DerefMut for SharedContext<'p, 'sess, S>

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fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

Auto Trait Implementations§

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impl<'p, 'sess, S> !DynSend for SharedContext<'p, 'sess, S>

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impl<'p, 'sess, S> !DynSync for SharedContext<'p, 'sess, S>

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impl<'p, 'sess, S> Freeze for SharedContext<'p, 'sess, S>
where <S as Stage>::Id: Freeze,

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impl<'p, 'sess, S> !RefUnwindSafe for SharedContext<'p, 'sess, S>

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impl<'p, 'sess, S> !Send for SharedContext<'p, 'sess, S>

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impl<'p, 'sess, S> !Sync for SharedContext<'p, 'sess, S>

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impl<'p, 'sess, S> Unpin for SharedContext<'p, 'sess, S>
where <S as Stage>::Id: Unpin,

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impl<'p, 'sess, S> !UnwindSafe for SharedContext<'p, 'sess, S>

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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<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<P, T> Receiver for P
where P: Deref<Target = T> + ?Sized, T: ?Sized,

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type Target = T

🔬This is a nightly-only experimental API. (arbitrary_self_types)
The target type on which the method may be called.
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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<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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impl<T> ErasedDestructor for T
where T: 'static,

Layout§

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.