Struct SharedContext 

pub 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,
    pub(crate) emit_lint: &'p mut dyn FnMut(AttributeLint<S::Id>),
}

Context given to every attribute parser during finalization.

Gives AttributeParsers enough information to create errors, for example.

Fields

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>)

Implementations

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

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

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.

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

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

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

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

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

pub(crate) fn features_option(&self) -> Option<&'sess Features>

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

pub fn parse_attribute_list( &mut self, attrs: &[Attribute], target_span: Span, target_id: S::Id, target: Target, 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.

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

Trait Implementations

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

type Target = AttributeParser<'sess, S>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

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

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

Mutably dereferences the value.

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.