Enum TryReserveError 

pub enum TryReserveError {
    CapacityExceeded {
        requested: usize,
        limit: usize,
    },
    Overflow,
    RegionIdExhausted(RegionIdExhaustedError),
}

Error returned by fallible Region<T> constructors and capacity operations.

Variants

CapacityExceeded

The requested capacity/length exceeds slotmap’s maximum live-entry domain.

Fields

requested: usize

The capacity or length that was requested

limit: usize

Slotmap’s maximum live-entry limit (2^32 - 2 for reserve operations, 2^32 - 3 for with_capacity since one slot is reserved as a sentinel)

Overflow

An internal capacity computation overflowed usize.

RegionIdExhausted(RegionIdExhaustedError)

The process-wide region_id counter has been exhausted. Only ever returned by Region::try_new/try_with_capacity (constructors mint a new region_id); Region::try_reserve on an existing Region never produces this variant, since it does not mint a new region_id.

Trait Implementations

impl Clone for TryReserveError

fn clone(&self) -> TryReserveError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TryReserveError

impl Debug for TryReserveError

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

Formats the value using the given formatter.

impl Display for TryReserveError

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

Formats the value using the given formatter.

impl Eq for TryReserveError

impl Error for TryReserveError

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<RegionIdExhaustedError> for TryReserveError

fn from(err: RegionIdExhaustedError) -> Self

Converts to this type from the input type.

impl PartialEq for TryReserveError

fn eq(&self, other: &TryReserveError) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for TryReserveError