Trait AttributesExt

pub(crate) trait AttributesExt {
    type AttributeIterator<'a>: Iterator<Item = MetaItemInner>
       where Self: 'a;
    type Attributes<'a>: Iterator<Item = &'a Attribute>
       where Self: 'a;

    // Required methods
    fn lists(&self, name: Symbol) -> Self::AttributeIterator<'_>;
    fn iter(&self) -> Self::Attributes<'_>;

    // Provided method
    fn cfg(
        &self,
        tcx: TyCtxt<'_>,
        hidden_cfg: &FxHashSet<Cfg>,
    ) -> Option<Arc<Cfg>> { ... }
}

Required Associated Types

type AttributeIterator<'a>: Iterator<Item = MetaItemInner> where Self: 'a

type Attributes<'a>: Iterator<Item = &'a Attribute> where Self: 'a

Required Methods

fn lists(&self, name: Symbol) -> Self::AttributeIterator<'_>

fn iter(&self) -> Self::Attributes<'_>

Provided Methods

fn cfg(&self, tcx: TyCtxt<'_>, hidden_cfg: &FxHashSet<Cfg>) -> Option<Arc<Cfg>>

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl AttributesExt for [(Cow<'_, Attribute>, Option<DefId>)]

type AttributeIterator<'a> = impl Iterator<Item = MetaItemInner> + 'a where Self: 'a

type Attributes<'a> = impl Iterator<Item = &'a Attribute> + 'a where Self: 'a

fn lists(&self, name: Symbol) -> Self::AttributeIterator<'_>

fn iter(&self) -> Self::Attributes<'_>

impl AttributesExt for [Attribute]

type AttributeIterator<'a> = impl Iterator<Item = MetaItemInner> + 'a

type Attributes<'a> = impl Iterator<Item = &'a Attribute> + 'a

fn lists(&self, name: Symbol) -> Self::AttributeIterator<'_>

fn iter(&self) -> Self::Attributes<'_>

Implementors