virt-ic 0.5.2

virtual integrated circuits - an backend IC emulator
Documentation 
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use std::{collections::BTreeMap, marker::PhantomData};

#[derive(Debug, Clone)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
#[cfg_attr(feature = "serde", serde(transparent))]
#[repr(transparent)]
pub struct Id<T: Clone>(usize, PhantomData<T>);

impl<T> PartialEq for Id<T>
where
    T: Clone,
{
    fn eq(&self, other: &Self) -> bool {
        self.0 == other.0
    }
}

#[derive(Debug, Clone)]
#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
pub struct Storage<T: Clone> {
    next_id: usize,
    storage: BTreeMap<usize, T>,
}

impl<T> Storage<T>
where
    T: Clone,
{
    pub fn new() -> Self {
        Storage {
            next_id: 0,
            storage: BTreeMap::new(),
        }
    }

    pub fn add(&mut self, value: T) -> Id<T> {
        self.storage.insert(self.next_id, value);
        self.next_id += 1;
        Id(self.storage.len() - 1, PhantomData::default())
    }

    // this needs invalidating every Id instance
    pub fn remove(&mut self, id: Id<T>) -> Option<T> {
        self.storage.remove(&id.0)
    }

    pub fn get(&self, id: &Id<T>) -> Option<&T> {
        self.storage.get(&id.0)
    }

    pub fn get_mut(&mut self, id: &Id<T>) -> Option<&mut T> {
        self.storage.get_mut(&id.0)
    }

    pub fn as_vec(&self) -> Vec<(Id<T>, &T)> {
        let mut vec = vec![];
        for (id, value) in self.storage.iter() {
            vec.push((Id(*id, PhantomData::default()), value));
        }
        vec
    }

    pub fn as_mut_vec(&mut self) -> Vec<(Id<T>, &mut T)> {
        let mut vec = vec![];
        for (id, value) in self.storage.iter_mut() {
            vec.push((Id(*id, PhantomData::default()), value));
        }
        vec
    }
}

impl<T> Default for Storage<T>
where
    T: Clone,
{
    fn default() -> Self {
        Self::new()
    }
}

impl<T> Copy for Id<T> where T: Clone {}