generic_container/impls/
rc_refcell.rs

1use core::convert::Infallible;
2use core::cell::{Ref, RefCell, RefMut};
3use alloc::rc::Rc;
4
5use crate::container_traits::{
6    FragileContainer, FragileMutContainer, FragileTryContainer, FragileTryMutContainer,
7};
8
9
10impl<T: ?Sized> FragileTryContainer<T> for Rc<RefCell<T>> {
11    type Ref<'a>  = Ref<'a, T> where T: 'a;
12    type RefError = Infallible;
13
14    #[inline]
15    fn new_container(t: T) -> Self where T: Sized {
16        Self::new(RefCell::new(t))
17    }
18
19    /// Attempt to retrieve the inner `T` from the container.
20    /// Behaves identically to [`Rc::into_inner`].
21    #[inline]
22    fn into_inner(self) -> Option<T> where T: Sized {
23        Self::into_inner(self).map(RefCell::into_inner)
24    }
25
26    /// Get immutable access to the inner `T`.
27    ///
28    /// Uses [`RefCell::borrow`], so this container is
29    /// [fragile](crate#fragility-potential-panics-or-deadlocks).
30    ///
31    /// ## Panics
32    /// Panics if the contract of a fragile container is broken.
33    #[inline]
34    fn try_get_ref(&self) -> Result<Self::Ref<'_>, Self::RefError> {
35        Ok(self.borrow())
36    }
37}
38
39impl<T: ?Sized> FragileContainer<T> for Rc<RefCell<T>> {
40    /// Get immutable access to the inner `T`.
41    ///
42    /// Uses [`RefCell::borrow`], so this container is
43    /// [fragile](crate#fragility-potential-panics-or-deadlocks).
44    ///
45    /// ## Panics
46    /// Panics if the contract of a fragile container is broken.
47    #[inline]
48    fn get_ref(&self) -> Self::Ref<'_> {
49        self.borrow()
50    }
51}
52
53impl<T: ?Sized> FragileTryMutContainer<T> for Rc<RefCell<T>> {
54    type RefMut<'a>  = RefMut<'a, T> where T: 'a;
55    type RefMutError = Infallible;
56
57    /// Get mutable access to the inner `T`.
58    ///
59    /// Uses [`RefCell::borrow_mut`], so this container is
60    /// [fragile](crate#fragility-potential-panics-or-deadlocks).
61    ///
62    /// ## Panics
63    /// Panics if the contract of a fragile container is broken.
64    #[inline]
65    fn try_get_mut(&mut self) -> Result<Self::RefMut<'_>, Self::RefMutError> {
66        Ok(self.borrow_mut())
67    }
68}
69
70impl<T: ?Sized> FragileMutContainer<T> for Rc<RefCell<T>> {
71    /// Get mutable access to the inner `T`.
72    ///
73    /// Uses [`RefCell::borrow_mut`], so this container is
74    /// [fragile](crate#fragility-potential-panics-or-deadlocks).
75    ///
76    /// ## Panics
77    /// Panics if the contract of a fragile container is broken.
78    #[inline]
79    fn get_mut(&mut self) -> Self::RefMut<'_> {
80        self.borrow_mut()
81    }
82}
generic_container/impls/rc_refcell.rs

generic_container/impls/
rc_refcell.rs
