Enum VisitFlow

pub enum VisitFlow {
    Next,
    Break,
    Skip,
}

A visitor signal that is returned from Visitor callbacks to alter the flow of traversal.

The default callbacks all return VisitFlow::Next, which continues the depth-first traversal. The other signals may be used to skip over a node in a before_ callback or to abort traversal entirely without visiting any more AST Nodes.

Variants

Next

Continue visiting nodes as usual.

Break

Abort the traversal without performing any subsequent visits.

Skip

Skip over the current node without performing any deeper traversal. (Only applies to enter_ callbacks)

Trait Implementations

impl Clone for VisitFlow

fn clone(&self) -> VisitFlow

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for VisitFlow

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Hash for VisitFlow

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for VisitFlow

fn eq(&self, other: &VisitFlow) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for VisitFlow

impl Eq for VisitFlow

impl StructuralPartialEq for VisitFlow