Trait AttributeExt 

pub trait AttributeExt: Debug {
    // Required methods
    fn id(&self) -> AttrId;
    fn meta_item_list(&self) -> Option<ThinVec<MetaItemInner>>;
    fn value_str(&self) -> Option<Symbol>;
    fn value_span(&self) -> Option<Span>;
    fn ident(&self) -> Option<Ident>;
    fn path_matches(&self, name: &[Symbol]) -> bool;
    fn is_doc_comment(&self) -> Option<Span>;
    fn span(&self) -> Span;
    fn is_word(&self) -> bool;
    fn ident_path(&self) -> Option<SmallVec<[Ident; 1]>>;
    fn doc_str(&self) -> Option<Symbol>;
    fn is_automatically_derived_attr(&self) -> bool;
    fn doc_str_and_comment_kind(&self) -> Option<(Symbol, CommentKind)>;
    fn doc_resolution_scope(&self) -> Option<AttrStyle>;

    // Provided methods
    fn name(&self) -> Option<Symbol> { ... }
    fn has_name(&self, name: Symbol) -> bool { ... }
    fn has_any_name(&self, names: &[Symbol]) -> bool { ... }
    fn path(&self) -> SmallVec<[Symbol; 1]> { ... }
    fn is_proc_macro_attr(&self) -> bool { ... }
}

Required Methods

fn id(&self) -> AttrId

fn meta_item_list(&self) -> Option<ThinVec<MetaItemInner>>

Get the meta item list, #[attr(meta item list)]

fn value_str(&self) -> Option<Symbol>

Gets the value literal, as string, when using #[attr = value]

fn value_span(&self) -> Option<Span>

Gets the span of the value literal, as string, when using #[attr = value]

fn ident(&self) -> Option<Ident>

For a single-segment attribute, returns its ident; otherwise, returns None.

fn path_matches(&self, name: &[Symbol]) -> bool

Checks whether the path of this attribute matches the name.

Matches one segment of the path to each element in name

fn is_doc_comment(&self) -> Option<Span>

Returns true if it is a sugared doc comment (/// or //! for example). So #[doc = "doc"] (which is a doc comment) and #[doc(...)] (which is not a doc comment) will return false.

fn span(&self) -> Span

get the span of the entire attribute

fn is_word(&self) -> bool

fn ident_path(&self) -> Option<SmallVec<[Ident; 1]>>

Returns None for doc comments

fn doc_str(&self) -> Option<Symbol>

Returns the documentation if this is a doc comment or a sugared doc comment.

• ///doc returns Some("doc").
• #[doc = "doc"] returns Some("doc").
• #[doc(...)] returns None.

fn is_automatically_derived_attr(&self) -> bool

fn doc_str_and_comment_kind(&self) -> Option<(Symbol, CommentKind)>

Returns the documentation and its kind if this is a doc comment or a sugared doc comment.

• ///doc returns Some(("doc", CommentKind::Line)).
• /** doc */ returns Some(("doc", CommentKind::Block)).
• #[doc = "doc"] returns Some(("doc", CommentKind::Line)).
• #[doc(...)] returns None.

fn doc_resolution_scope(&self) -> Option<AttrStyle>

Returns outer or inner if this is a doc attribute or a sugared doc comment, otherwise None.

This is used in the case of doc comments on modules, to decide whether to resolve intra-doc links against the symbols in scope within the commented module (for inner doc) vs within its parent module (for outer doc).

Provided Methods

fn name(&self) -> Option<Symbol>

For a single-segment attribute (i.e., #[attr] and not #[path::atrr]), return the name of the attribute; otherwise, returns None.

fn has_name(&self, name: Symbol) -> bool

fn has_any_name(&self, names: &[Symbol]) -> bool

fn path(&self) -> SmallVec<[Symbol; 1]>

fn is_proc_macro_attr(&self) -> bool

Implementors

impl AttributeExt for Attribute