teo_parser/traits/
resolved.rs

1use std::cell::RefCell;
2
3pub trait Resolve<T> {
4
5    fn resolved_ref_cell(&self) -> &RefCell<Option<T>>;
6
7    fn resolve(&self, resolved: T) {
8        *(unsafe { &mut *self.resolved_ref_cell().as_ptr() }) = Some(resolved);
9    }
10
11    fn resolved(&self) -> &T {
12        (unsafe { &*self.resolved_ref_cell().as_ptr() }).as_ref().unwrap()
13    }
14
15    fn resolved_mut(&self) -> &mut T {
16        (unsafe { &mut *self.resolved_ref_cell().as_ptr() }).as_mut().unwrap()
17    }
18
19    fn is_resolved(&self) -> bool {
20        self.resolved_ref_cell().borrow().is_some()
21    }
22}
23
24pub trait ResolveAndClone<T>: Resolve<T> where T: Clone {
25    fn resolve_and_return(&self, resolved: T) -> T {
26        self.resolve(resolved.clone());
27        resolved
28    }
29}