pub enum Error {
Mismatch,
Downcast,
}Expand description
Storage error.
Variants§
Trait Implementations§
Source§impl Error for Error
impl Error for Error
1.30.0 · Source§fn source(&self) -> Option<&(dyn Error + 'static)>
fn source(&self) -> Option<&(dyn Error + 'static)>
Returns the lower-level source of this error, if any. Read more
1.0.0 · Source§fn description(&self) -> &str
fn description(&self) -> &str
👎Deprecated since 1.42.0:
use the Display impl or to_string()
Auto Trait Implementations§
impl Freeze for Error
impl RefUnwindSafe for Error
impl Send for Error
impl Sync for Error
impl Unpin for Error
impl UnsafeUnpin for Error
impl UnwindSafe for Error
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
Source§impl<K, V> TryAsStorage<K> for V
impl<K, V> TryAsStorage<K> for V
Source§fn try_as_storage(
item: &(dyn Any + 'static),
) -> Result<<V as TryAsStorage<K>>::Target<'_>, Error>
fn try_as_storage( item: &(dyn Any + 'static), ) -> Result<<V as TryAsStorage<K>>::Target<'_>, Error>
Attempts to convert into a storage reference.
§Errors
The following errors might be returned:
Error::Downcast: Item cannot be downcast.
§Examples
use std::any::Any;
use zrx_storage::convert::TryAsStorage;
use zrx_storage::Storage;
// Create storage and initial state
let mut storage = Storage::default();
storage.insert("key", 42);
// Obtain type-erased reference
let item: &dyn Any = &storage;
// Obtain storage reference
let storage = <i32>::try_as_storage(item)?;Source§impl<K, V> TryAsStorageMut<K> for V
impl<K, V> TryAsStorageMut<K> for V
Source§fn try_as_storage_mut(
item: &mut (dyn Any + 'static),
) -> Result<<V as TryAsStorageMut<K>>::Target<'_>, Error>
fn try_as_storage_mut( item: &mut (dyn Any + 'static), ) -> Result<<V as TryAsStorageMut<K>>::Target<'_>, Error>
Attempts to convert into a mutable storage reference.
§Errors
The following errors might be returned:
Error::Downcast: Item cannot be downcast.
§Examples
use std::any::Any;
use zrx_storage::convert::TryAsStorageMut;
use zrx_storage::Storage;
// Create storage and initial state
let mut storage = Storage::default();
storage.insert("key", 42);
// Obtain mutable type-erased reference
let item: &mut dyn Any = &mut storage;
// Obtain mutable storage reference
let storage = <i32>::try_as_storage_mut(item)?;