Enum HandleError

pub enum HandleError {
    NullHandle,
    InvalidHandle,
    StaleVersion,
    IndexPastEnd,
    WrongMap,
}

An error representing the ways a Handle may be invalid.

Variants

NullHandle

Identical to invalid handle, but has a slightly more helpful message for the most common case 0.

InvalidHandle

Returned from Handle::from_u64 if Handle::is_valid fails.

StaleVersion

Returned from get/get_mut/delete if the handle is stale (this indicates something equivalent to a use-after-free / double-free, etc).

IndexPastEnd

Returned if the handle index references an index past the end of the HandleMap.

WrongMap

The handle has a map_id for a different map than the one it was attempted to be used with.

Trait Implementations

impl Clone for HandleError

fn clone(&self) -> HandleError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HandleError

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

Formats the value using the given formatter.

impl Display for HandleError

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

Formats the value using the given formatter.

impl Error for HandleError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<HandleError> for ExternError

fn from(e: HandleError) -> Self

Converts to this type from the input type.

impl Ord for HandleError

fn cmp(&self, other: &HandleError) -> 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 PartialEq for HandleError

fn eq(&self, other: &HandleError) -> 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 PartialOrd for HandleError

fn partial_cmp(&self, other: &HandleError) -> 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 Eq for HandleError

impl StructuralPartialEq for HandleError