Enum rand::distributions::WeightedError

pub enum WeightedError {
    NoItem,
    NegativeWeight,
    AllWeightsZero,
}

Error type returned from WeightedIndex::new.

Variants

NoItem

The provided iterator contained no items.

NegativeWeight

A weight lower than zero was used.

AllWeightsZero

All items in the provided iterator had a weight of zero.

Trait Implementations

impl Clone for WeightedError

fn clone(&self) -> WeightedError

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for WeightedError

impl Eq for WeightedError

impl PartialEq<WeightedError> for WeightedError

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

This method tests for self and other values to be equal, and is used by ==.

#[must_use] fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl Display for WeightedError

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

Formats the value using the given formatter.

impl Debug for WeightedError

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

Formats the value using the given formatter.

impl Error for WeightedError

fn description(&self) -> &str

This method is soft-deprecated.

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

Deprecating in 1.33.0

: replaced by Error::source, which can support downcasting

The lower-level cause of this error, if any.

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

The lower-level source of this error, if any.