Enum Rule 

#[non_exhaustive]
pub enum Rule {
    Range,
    Step,
    Length,
    Pattern,
    Variant,
    Unique,
}

The kind of typl constraint a Violation breaks.

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.

Range

A number is outside its declared range.

Step

A number is not its range’s lower bound plus a whole multiple of its declared step.

Length

A string, a byte sequence or a collection is outside its declared length bounds.

Pattern

A string does not match its declared pattern.

Variant

A discriminant names no declared variant.

Unique

A map contains more than one entry with the same key.

Trait Implementations

impl Clone for Rule

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Rule

impl Debug for Rule

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

Formats the value using the given formatter.

impl Eq for Rule

impl PartialEq for Rule

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Rule