How can I make a variable borrow for 'static?

Question

In vulkano, to create a CPUAccessibleBuffer you need give it some data and the CPUAccessibleBuffer::from_data function requires the data to have the 'static lifetime.

I have some data in &[u8] array (created at runtime) that I would like to pass to that function.

However, it errors with this message

argument requires that `data` is borrowed for `'static`

So how can I make the lifetime of the data 'static ?

Answer 1

You should use CpuAccessibleBuffer::from_iter instead, it does the same thing but does not require the collection to be Copy or 'static:

let data: &[u8] = todo!();

let _ = CpuAccessibleBuffer::from_iter(
    device,
    usage,
    host_cached,
    data.iter().copied(), // <--- pass like so
);

Or if you actually have a Vec<u8>, you can pass it directly:

let data: Vec<u8> = todo!();

let _ = CpuAccessibleBuffer::from_iter(
    device,
    usage,
    host_cached,
    data, // <--- pass like so
);