Enum AttrTree 

pub enum AttrTree {
    Marker,
    Valued {
        equal: Punct,
        value: TokenTree,
    },
    Container {
        group: Delimiter,
        nodes: Vec<AttrNode>,
        tailfish: bool,
    },
}

data of an attribute node

Variants

Marker

a non-valued attribute

e.g. #[attr(foo)]

Valued

a valued attribute

has a given value as a TokenTree

e.g. #[attr(foo=10)] or #[attr(foo=(10 + 10))]

Fields

equal: Punct

equal token

value: TokenTree

value token(s)

Container

a container attribute

has multiple descendants

e.g. #[attr(foo(bar))] or #[attr(foo::bar)]

Fields

group: Delimiter

group delimiter

nodes: Vec<AttrNode>

descendant nodes

tailfish: bool

is a tailfish container (e.g. foo::bar)