Struct CheckedRcRefCell

pub struct CheckedRcRefCell<T: ?Sized>(pub Rc<RefCell<T>>);

Available on crate feature alloc only.

A thin wrapper around Rc<RefCell<T>> which implements the container traits differently: CheckedRcRefCell<T> is fallible, but not fragile.

Note that Rc<RefCell<T>> is an infallible but fragile container, essentially interpreting any circumstance which would return an error in CheckedRcRefCell<T> as instead being a bug and panicking. The user of a fragile container must uphold greater restrictions, in exchange for infallibility. Those restrictions still effectively apply here, but violating them results in errors being returned instead of being fatal.

Tuple Fields

0: Rc<RefCell<T>>

Trait Implementations

impl<T: ?Sized> Clone for CheckedRcRefCell<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug + ?Sized> Debug for CheckedRcRefCell<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T: Default + ?Sized> Default for CheckedRcRefCell<T>

fn default() -> CheckedRcRefCell<T>

Returns the “default value” for a type.

impl<T: ?Sized> FragileTryContainer<T> for CheckedRcRefCell<T>

fn into_inner(self) -> Option<T>

where T: Sized,

Attempt to retrieve the inner T from the container. Behaves identically to Rc::into_inner.

fn try_get_ref(&self) -> Result<Self::Ref<'_>, Self::RefError>

Immutably borrows the inner T, returning an error if the value is currently mutably borrowed.

Behaves identically to RefCell::try_borrow.

type Ref<'a> = Ref<'a, T> where T: 'a

An immutably borrowed value from the container.

type RefError = BorrowError

An error that might be returned by try_get_ref. This type should implement std::error::Error.

fn new_container(t: T) -> Self

where T: Sized,

Create a new container that owns the provided T.

impl<T: ?Sized> FragileTryMutContainer<T> for CheckedRcRefCell<T>

fn try_get_mut(&mut self) -> Result<Self::RefMut<'_>, Self::RefMutError>

Mutably borrows the inner T, returning an error if the value is currently borrowed.

Behaves identically to RefCell::try_borrow_mut.

type RefMut<'a> = RefMut<'a, T> where T: 'a

A mutably borrowed value from the container.

type RefMutError = BorrowMutError

An error that might be returned by try_get_mut. This type should implement std::error::Error.

impl<T: Ord + ?Sized> Ord for CheckedRcRefCell<T>

fn cmp(&self, other: &CheckedRcRefCell<T>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<T: PartialEq + ?Sized> PartialEq for CheckedRcRefCell<T>

fn eq(&self, other: &CheckedRcRefCell<T>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: PartialOrd + ?Sized> PartialOrd for CheckedRcRefCell<T>

fn partial_cmp(&self, other: &CheckedRcRefCell<T>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<T: Eq + ?Sized> Eq for CheckedRcRefCell<T>

impl<T: ?Sized> StructuralPartialEq for CheckedRcRefCell<T>

impl<T: ?Sized> TryContainer<T> for CheckedRcRefCell<T>

impl<T: ?Sized> TryMutContainer<T> for CheckedRcRefCell<T>