err.log

src/inventory.rs:30:9: 48:10 error: type mismatch resolving `<core::slice::IterMut<'_, inventory::Slot<T>> as core::iter::Iterator>::Item == inventory::Slot<_>`:
 expected &-ptr,
    found enum `inventory::Slot` [E0271]
src/inventory.rs:30         for slot in self.slots.iter_mut() {
src/inventory.rs:31             if let Slot::Some(other, stackSize) = slot {
src/inventory.rs:32                 if itemType != other.itemType() { continue; }
src/inventory.rs:33 
src/inventory.rs:34                 let remainder = other.maxStackSize() - stackSize;
src/inventory.rs:35                 if remainder >= sum {
                    ...
src/inventory.rs:30:9: 48:10 help: run `rustc --explain E0271` to see a detailed explanation

inventory.rs

enum Slot<T> {
    None,
    Some(T, i32),
}


pub struct Inventory<T> {
    slots: Vec<Slot<T>>,
}

impl<T: Item + Clone> Inventory<T> {

    pub fn new(length: usize) -> Inventory<T> {
        Inventory { slots: Vec::<Slot<T>>::with_capacity(length) }
    }

    pub fn len(&self) -> usize {
        self.slots.len();
    }

    pub fn give(&self, item: T, amount: i32) -> bool {
        let itemType: &str = item.itemType();
        if !self.hasSpace(item, amount) {
            return false;
        }
        let mut sum: i32 = amount;
        for slot in self.slots.iter_mut() {
            if let Slot::Some(other, stackSize) = slot {