Struct WeakAccount 

pub struct WeakAccount(/* private fields */);

Weak handle onto an Account

Like Account, but doesn’t keep the account alive. Must be upgraded before use.

Implementations

impl WeakAccount

pub fn upgrade(&self) -> Result<Account>

Upgrade to an Account, if the account still exists

No-op WeakAccounts can always be upgraded.

pub fn tracker(&self) -> Weak<MemoryQuotaTracker>

Obtains a handle onto the MemoryQuotaTracker

The returned handle is itself weak, and needs to be upgraded before use.

If the Account was made a no-op MemoryQuotaTracker (ie, one from MemoryQuotaTracker::new_noop) the returned value is always Weak.

pub fn new_dangling() -> Self

Creates a new dangling, dummy, WeakAccount

This can be used as a standin where a value of type WeakAccount is needed. The returned value cannot be upgraded to an Account, so cannot be used to claim memory or find a MemoryQuotaTracker.

(If memory quota tracking is disabled at compile time, the returned value can be upgraded, to a no-op Account.)

Trait Implementations

impl Clone for WeakAccount

fn clone(&self) -> WeakAccount

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WeakAccount

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

Formats the value using the given formatter.