Enum DecreaseKeyError 

pub enum DecreaseKeyError {
    InvalidHandle {
        slot: u32,
        generation: u32,
    },
    NewKeyGreaterThanCurrent,
}

An error returned from FibHeap::decrease_key.

Variants

InvalidHandle

The provided handle was invalid (e.g., NONE, out of bounds, or pointed to a free node).

The slot and generation fields carry the values from the handle that was rejected, which is useful for debugging stale or mismatched handles.

Fields

slot: u32

Slot index from the rejected handle.

generation: u32

Generation value from the rejected handle.

NewKeyGreaterThanCurrent

The new key is greater than current

Trait Implementations

impl Debug for DecreaseKeyError

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

Formats the value using the given formatter.

impl Display for DecreaseKeyError

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

Formats the value using the given formatter.

impl Error for DecreaseKeyError

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 PartialEq for DecreaseKeyError

fn eq(&self, other: &DecreaseKeyError) -> 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 Eq for DecreaseKeyError

impl StructuralPartialEq for DecreaseKeyError