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This post is auto-generated from RSS feed The Rust Programming Language Forum - Latest topics. Source: Vec - Removing an element at an index without removing elmenet

Hello,

I am trying to implement a circular buffer using Vec. Vec::insert() transfers ownership to the Vec. I am trying to find a way to be able to remove/extract the element from the Vec without "deleting" the "index" where the element is present.

I am running into the error "cannot move out of index of Vec<>". I thought of using an Option<>, but ran into same issue.

Following is code snippet of the API

pub struct CircularBuffer<T> {
    // ...
}

impl<T> CircularBuffer<T> {
    pub fn new(capacity: usize) -> Self { todo!() }
    pub fn write(&mut self, element: T) -> Result<(), Error> { todo!() }
    pub fn read(&mut self) -> Result<T, Error> { todo!() }
}

Would appreciate any pointers.
(In C++ I would use an array of ptrs, setting element to null when value at an index is empty.).

Regards,
Ahmed.

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