Enum Variant 

#[non_exhaustive]
#[repr(u8)]
pub enum Variant {
    NCS = 0,
    RFC4122 = 1,
    Microsoft = 2,
    Future = 3,
}

The reserved variants of UUIDs.

Unlike the version field, which is a strict set of values, the variant behaves more like a mask. Multiple bit patterns in a UUID’s variant field may correspond to the same variant value.

References

• Variant Field in RFC 9562

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.

NCS = 0

Reserved by the NCS for backward compatibility.

The Nil UUID will return this variant.

RFC4122 = 1

The variant specified in RFC9562.

The majority of UUIDs use this variant.

Microsoft = 2

Reserved by Microsoft for backward compatibility.

Future = 3

Reserved for future expansion.

The Max UUID will return this variant.

Trait Implementations

impl Clone for Variant

fn clone(&self) -> Variant

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Variant

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

Formats the value using the given formatter.

impl Display for Variant

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

Formats the value using the given formatter.

impl PartialEq for Variant

fn eq(&self, other: &Variant) -> 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 Copy for Variant

impl StructuralPartialEq for Variant