Enum Control 

pub enum Control<B = ()> {
    Continue,
    Break(B),
    Prune,
}

Control flow for algorithm visitors.

Returned by visitor callbacks to control traversal behavior.

Variants

Continue

Continue the algorithm normally.

Break(B)

Stop the algorithm and return the break value.

Prune

Skip the current subtree (for traversals) but continue the algorithm.

Implementations

impl<B> Control<B>

pub fn is_continue(&self) -> bool

Returns true if this is Continue.

pub fn is_break(&self) -> bool

Returns true if this is Break.

pub fn is_prune(&self) -> bool

Returns true if this is Prune.

pub fn break_value(self) -> Option<B>

Converts to an option containing the break value.

Trait Implementations

impl<B: Clone> Clone for Control<B>

fn clone(&self) -> Control<B>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<B: Debug> Debug for Control<B>

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

Formats the value using the given formatter.

impl<B> Default for Control<B>

fn default() -> Self

Returns the “default value” for a type.

impl<B: PartialEq> PartialEq for Control<B>

fn eq(&self, other: &Control<B>) -> 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<B: Copy> Copy for Control<B>

impl<B: Eq> Eq for Control<B>

impl<B> StructuralPartialEq for Control<B>