rune_alloc/btree/
set_val.rs

1use crate::clone::TryClone;
2use crate::error::Error;
3
4/// Zero-Sized Type (ZST) for internal `BTreeSet` values.
5/// Used instead of `()` to differentiate between:
6/// * `BTreeMap<T, ()>` (possible user-defined map)
7/// * `BTreeMap<T, SetValZST>` (internal set representation)
8#[derive(Debug, Eq, PartialEq, Ord, PartialOrd, Hash, Clone, Default)]
9pub(crate) struct SetValZST;
10
11impl TryClone for SetValZST {
12    fn try_clone(&self) -> Result<Self, Error> {
13        Ok(Self)
14    }
15}