Struct lib_ruby_parser::traverse::visitor::Visitor[−][src]

pub struct Visitor<T> where
    T: Observer,  {
    pub observer: T,
}

Generic visitor of Node.

It doesn’t do anything on its own, but it notifies given Observer.

struct MyObserver {
    pub numbers: Vec<nodes::Int>,
}

impl Observer for MyObserver {
    fn on_int(&mut self, node: &nodes::Int) {
        self.numbers.push(node.clone())
    }
}

let source = "2 + 3";
let mut parser = Parser::new(source.as_bytes(), ParserOptions::default());
let ast = parser.do_parse().ast.unwrap();

let observer = MyObserver { numbers: vec![] };
let visitor = Visitor { observer };

visitor.visit_root(&ast);

println!("{:?}", visitor.observer.numbers);
// => [Int { value: "2" }, Int { value: "3" }]

Fields

observer: T

Observer of the visitor, receives calls like on_int(&mut self, node: nodes::Int)

Implementations

impl<T> Visitor<T> where
    T: Observer, [src]

pub fn visit_root(&mut self, node: &Node)[src]

Starts traversing on a given node

Trait Implementations

impl<T: Debug> Debug for Visitor<T> where
    T: Observer, [src]

Auto Trait Implementations

impl<T> RefUnwindSafe for Visitor<T> where
    T: RefUnwindSafe, 

impl<T> Send for Visitor<T> where
    T: Send, 

impl<T> Sync for Visitor<T> where
    T: Sync, 

impl<T> Unpin for Visitor<T> where
    T: Unpin, 

impl<T> UnwindSafe for Visitor<T> where
    T: UnwindSafe, 

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> From<T> for T[src]

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

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.