README.md

WrappedSlab

Also available on crates.io.

Very simple Rust library useful when you want stronger type guarantees than Slab's usize keys. Generates TSlab(Slab<T>) that accepts TKey instead of usize. TVacantEntry(VacantEntry<T>) is also generated along the same lines. This should be a drop-in replacement for Slab<T>, provided all the keys are changed from usize to TKey.

Example

use wrapped_slab::WrappedSlab;

#[derive(WrappedSlab)]
struct TestUnitStruct(String);

fn main() {
    let mut slab = TestUnitStructSlab::default();
    let key: TestUnitStructKey = slab.insert(TestUnitStruct("testing".into()));
    let val: Option<&TestUnitStruct> = slab.get(key);
    let next_entry: TestUnitStructVacantEntry = slab.vacant_entry();
    let next_key: TestUnitStructKey = next_entry.key();
    let next_entry_ref: &mut TestUnitStruct = next_entry.insert(TestUnitStruct(format!("{next_key:?}")));

    // See wrapped_slab/tests/ for more examples
}