Std.Deque.popFront

fn

This is a callable function.

What it does

The front element and the queue without it, or None when there is none.

Both are answered together because a caller almost always wants both, and

asking twice would walk the same rebalancing twice.

Read the signature

• The text after the name is the type checked by Pudu.
• Read arrows from left to right: inputs come first, and the final type is returned.
• & borrows a value for this call instead of moving or copying it.
• Names inside [ ] are type arguments, such as the item type held by a collection.
• Option holds Some(value) or None when no value is available.