Struct rustc_ast::ast::Attribute

source ·
pub struct Attribute {
    pub kind: AttrKind,
    pub id: AttrId,
    pub style: AttrStyle,
    pub span: Span,
}
Expand description

Metadata associated with an item.

Fields§

§kind: AttrKind§id: AttrId§style: AttrStyle

Denotes if the attribute decorates the following construct (outer) or the construct this attribute is contained within (inner).

§span: Span

Implementations§

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

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.

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.

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.

Extracts the MetaItem from inside this Attribute.

Trait Implementations§

Returns a copy of the value. Read more
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more
This is true if this HasAttrs might support ‘custom’ (proc-macro) inner attributes. Attributes like #![cfg] and #![cfg_attr] are not considered ‘custom’ attributes. Read more

Auto Trait Implementations§

Blanket Implementations§

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.

Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.

Size: 32 bytes