[][src]Enum rustc_ast::ast::NestedMetaItem

pub enum NestedMetaItem {
    MetaItem(MetaItem),
    Literal(Lit),
}

Possible values inside of compile-time attribute lists.

E.g., the '..' in #[name(..)].

Variants

MetaItem(MetaItem)

A full MetaItem, for recursive meta items.

Literal(Lit)

A literal.

E.g., "foo", 64, true.

Implementations

impl NestedMetaItem[src]

pub fn meta_item(&self) -> Option<&MetaItem>[src]

Returns the MetaItem if self is a NestedMetaItem::MetaItem.

pub fn literal(&self) -> Option<&Lit>[src]

Returns the Lit if self is a NestedMetaItem::Literals.

pub fn has_name(&self, name: Symbol) -> bool[src]

Returns true if this list item is a MetaItem with a name of name.

pub fn ident(&self) -> Option<Ident>[src]

For a single-segment meta item, returns its name; otherwise, returns None.

pub fn name_or_empty(&self) -> Symbol[src]

pub fn value_str(&self) -> Option<Symbol>[src]

Gets the string value if self is a MetaItem and the MetaItem is a MetaItemKind::NameValue variant containing a string, otherwise None.

pub fn name_value_literal(&self) -> Option<(Symbol, &Lit)>[src]

Returns a name and single literal value tuple of the MetaItem.

pub fn meta_item_list(&self) -> Option<&[NestedMetaItem]>[src]

Gets a list of inner meta items from a list MetaItem type.

pub fn is_meta_item(&self) -> bool[src]

Returns true if the variant is MetaItem.

pub fn is_literal(&self) -> bool[src]

Returns true if the variant is Literal.

pub fn is_word(&self) -> bool[src]

Returns true if self is a MetaItem and the meta item is a word.

pub fn is_value_str(&self) -> bool[src]

Returns true if self is a MetaItem and the meta item is a ValueString.

pub fn is_meta_item_list(&self) -> bool[src]

Returns true if self is a MetaItem and the meta item is a list.

impl NestedMetaItem[src]

pub fn span(&self) -> Span[src]

fn token_trees_and_joints(&self) -> Vec<TreeAndJoint>[src]

fn from_tokens<I>(tokens: &mut Peekable<I>) -> Option<NestedMetaItem> where
    I: Iterator<Item = TokenTree>, 
[src]

Trait Implementations

impl Clone for NestedMetaItem[src]

impl Debug for NestedMetaItem[src]

impl Decodable for NestedMetaItem[src]

impl Encodable for NestedMetaItem[src]

impl<__CTX> HashStable<__CTX> for NestedMetaItem where
    __CTX: HashStableContext
[src]

Auto Trait Implementations

impl !RefUnwindSafe for NestedMetaItem

impl !Send for NestedMetaItem

impl !Sync for NestedMetaItem

impl Unpin for NestedMetaItem

impl !UnwindSafe for NestedMetaItem

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<T> Decodable for T where
    T: UseSpecializedDecodable
[src]

impl<T> Encodable for T where
    T: UseSpecializedEncodable + ?Sized
[src]

impl<T> From<T> for T[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

The resulting type after obtaining ownership.

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.