use std::sync::atomic::{AtomicUsize, Ordering};

/// The current index for the value counter.
static CURRENT: AtomicUsize = AtomicUsize::new(1);

/// An extremely basic way to identify a piece of data.
#[derive(Debug, Copy, Clone, Ord, PartialOrd, Eq, PartialEq)]
#[repr(C)]
pub struct ValueIdentifier(usize);

impl Default for ValueIdentifier {
    fn default() -> Self {
        Self(CURRENT.fetch_add(1, Ordering::SeqCst))
    }
}

/// An object with a specific identifier.
pub trait ValueIdentifiable {
    /// Get the identifier for the current object.
    fn value_identifier(&self) -> ValueIdentifier;
}