Struct rustc_data_structures::work_queue::WorkQueue

pub struct WorkQueue<T: Idx> {
    deque: VecDeque<T>,
    set: BitSet<T>,
}

A work queue is a handy data structure for tracking work left to do. (For example, basic blocks left to process.) It is basically a de-duplicating queue; so attempting to insert X if X is already enqueued has no effect. This implementation assumes that the elements are dense indices, so it can allocate the queue to size and also use a bit set to track occupancy.

Fields

deque: VecDeque<T>

set: BitSet<T>

Implementations

impl<T: Idx> WorkQueue<T>

pub fn with_none(len: usize) -> Self

Creates a new work queue that starts empty, where elements range from (0..len).

pub fn insert(&mut self, element: T) -> bool

Attempt to enqueue element in the work queue. Returns false if it was already present.

pub fn pop(&mut self) -> Option<T>

Attempt to pop an element from the work queue.

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: 64 bytes