Enum LengthMetric 

#[non_exhaustive]
pub enum LengthMetric {
    Bytes,
    UnicodeScalars,
    Elements,
}

Identifies how an observed string or collection length was measured.

The metric is retained in structured errors so equal numeric lengths and constraints remain distinguishable across strings and collections. This enum is non-exhaustive; downstream matches must include a wildcard arm.

use qubit_argument::LengthMetric;

fn label(metric: LengthMetric) -> &'static str {
    match metric {
        LengthMetric::Bytes => "bytes",
        LengthMetric::UnicodeScalars => "Unicode scalars",
        LengthMetric::Elements => "elements",
    }
}

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Bytes

The number of bytes in a UTF-8 string.

UnicodeScalars

The number of Unicode scalar values in a string.

Elements

The number of elements in a collection.

Trait Implementations

impl Clone for LengthMetric

fn clone(&self) -> LengthMetric

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for LengthMetric

impl Debug for LengthMetric

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

Formats the value using the given formatter.

impl Eq for LengthMetric

impl PartialEq for LengthMetric

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for LengthMetric