Enum rand::distributions::weighted::WeightedError

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pub enum WeightedError {
    NoItem,
    InvalidWeight,
    AllWeightsZero,
    TooMany,
}

[−] Expand description

Error type returned from WeightedIndex::new.

Variants

NoItem

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The provided weight collection contains no items.

InvalidWeight

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A weight is either less than zero, greater than the supported maximum or otherwise invalid.

AllWeightsZero

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All items in the provided weight collection are zero.

TooMany

[−] Expand description

Too many weights are provided (length greater than u32::MAX)

Trait Implementations

impl Clone for WeightedError[+]

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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 Debug for WeightedError[+]

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

Formats the value using the given formatter.

impl Display for WeightedError[+]

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

Formats the value using the given formatter.

impl Eq for WeightedError

impl Error for WeightedError[+]

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

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

fn backtrace(&self) -> Option<&Backtrace>[−]

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

Returns a stack backtrace, if available, of where this error occurred.

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

impl PartialEq<WeightedError> for WeightedError[+]

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

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

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

This method tests for !=.

impl StructuralEq for WeightedError

impl StructuralPartialEq for WeightedError