Crate itempool 

Item Pool

A lightweight library for managing pools of reusable items with support for random selection, unique set retrieval, and item recycling.

Features

• Random Item Selection: Efficiently retrieve random items from a pool
• Unique Sets: Get sets of unique items without duplicates
• Item Recycling: Temporarily discard items and recycle them back into the pool
• Zero Dependencies: Only uses rand for randomization

Example

use itempool::{ItemPool, RecyclingItemPool};
use std::collections::HashSet;

#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
struct EntityId(u32);

struct EnemyPool {
    available: Vec<EntityId>,
    discarded: Vec<EntityId>,
}

impl ItemPool<EntityId> for EnemyPool {
    fn pool(&mut self) -> &mut Vec<EntityId> {
        &mut self.available
    }
}

impl RecyclingItemPool<EntityId> for EnemyPool {
    fn get_discard_pool(&mut self) -> &mut Vec<EntityId> {
        &mut self.discarded
    }
}

Traits

ItemPool

Trait for a resource that manages a single store of items.

PoolItem

Trait for items that can be stored and retrieved from an item pool.

RecyclingItemPool

Trait for managing item pools with discard and recycling capabilities.