Struct NonNilUuid 

pub struct NonNilUuid(/* private fields */);

A UUID that is guaranteed not to be the nil UUID.

This is useful for representing optional UUIDs more efficiently, as Option<NonNilUuid> takes up the same space as Uuid.

Note that Uuids created by the following methods are guaranteed to be non-nil:

• [Uuid::new_v1]
• [Uuid::now_v1]
• [Uuid::new_v3]
• Uuid::new_v4
• [Uuid::new_v5]
• [Uuid::new_v6]
• [Uuid::now_v6]
• [Uuid::new_v7]
• [Uuid::now_v7]
• [Uuid::new_v8]

ABI

The NonNilUuid type does not yet have a stable ABI. Its representation or alignment may change. It is currently only guaranteed that NonNilUuid and Option<NonNilUuid> are the same size as Uuid.

Implementations

impl NonNilUuid

pub const fn new(uuid: Uuid) -> Option<NonNilUuid>

Creates a non-nil UUID if the value is non-nil.

pub const unsafe fn new_unchecked(uuid: Uuid) -> NonNilUuid

Creates a non-nil without checking whether the value is non-nil. This results in undefined behavior if the value is nil.

Safety

The value must not be nil.

pub const fn get(self) -> Uuid

Get the underlying Uuid value.

pub fn new_v4() -> NonNilUuid

Creates a non-nil random version 4 UUID.

See Uuid::new_v4 for details.

Trait Implementations

impl Clone for NonNilUuid

fn clone(&self) -> NonNilUuid

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NonNilUuid

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for NonNilUuid

fn deserialize<D>( deserializer: D, ) -> Result<NonNilUuid, <D as Deserializer<'de>>::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for NonNilUuid

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

Formats the value using the given formatter.

impl From<NonNilUuid> for Uuid

fn from(non_nil: NonNilUuid) -> Uuid

Converts a NonNilUuid back into a Uuid.

Examples

let uuid = Uuid::from_u128(0x0123456789abcdef0123456789abcdef);
let non_nil = NonNilUuid::try_from(uuid).unwrap();
let uuid_again = Uuid::from(non_nil);

assert_eq!(uuid, uuid_again);

impl FromReflect for NonNilUuid

fn from_reflect(reflect: &(dyn PartialReflect + 'static)) -> Option<NonNilUuid>

Constructs a concrete instance of Self from a reflected value.

fn take_from_reflect( reflect: Box<dyn PartialReflect>, ) -> Result<Self, Box<dyn PartialReflect>>

Attempts to downcast the given value to Self using, constructing the value using from_reflect if that fails.

impl GetTypeRegistration for NonNilUuid

fn get_type_registration() -> TypeRegistration

Returns the default TypeRegistration for this type.

fn register_type_dependencies(_registry: &mut TypeRegistry)

Registers other types needed by this type.

impl Hash for NonNilUuid

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for NonNilUuid

fn cmp(&self, other: &NonNilUuid) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq<NonNilUuid> for Uuid

fn eq(&self, other: &NonNilUuid) -> 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 PartialEq<Uuid> for NonNilUuid

fn eq(&self, other: &Uuid) -> 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 PartialEq for NonNilUuid

fn eq(&self, other: &NonNilUuid) -> 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 PartialOrd<NonNilUuid> for Uuid

fn partial_cmp(&self, other: &NonNilUuid) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl PartialOrd<Uuid> for NonNilUuid

fn partial_cmp(&self, other: &Uuid) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl PartialOrd for NonNilUuid

fn partial_cmp(&self, other: &NonNilUuid) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl PartialReflect for NonNilUuid

fn get_represented_type_info(&self) -> Option<&'static TypeInfo>

Returns the TypeInfo of the type represented by this value.

fn to_dynamic(&self) -> Result<Box<dyn PartialReflect>, ReflectCloneError>

Converts this reflected value into its dynamic representation based on its kind.

fn try_apply( &mut self, value: &(dyn PartialReflect + 'static), ) -> Result<(), ApplyError>

Tries to apply a reflected value to this value.

fn reflect_kind(&self) -> ReflectKind

Returns a zero-sized enumeration of “kinds” of type.

fn reflect_ref(&self) -> ReflectRef<'_>

Returns an immutable enumeration of “kinds” of type.

fn reflect_mut(&mut self) -> ReflectMut<'_>

Returns a mutable enumeration of “kinds” of type.

fn reflect_owned(self: Box<NonNilUuid>) -> ReflectOwned

Returns an owned enumeration of “kinds” of type.

fn try_into_reflect( self: Box<NonNilUuid>, ) -> Result<Box<dyn Reflect>, Box<dyn PartialReflect>>

Attempts to cast this type to a boxed, fully-reflected value.

fn try_as_reflect(&self) -> Option<&(dyn Reflect + 'static)>

Attempts to cast this type to a fully-reflected value.

fn try_as_reflect_mut(&mut self) -> Option<&mut (dyn Reflect + 'static)>

Attempts to cast this type to a mutable, fully-reflected value.

fn into_partial_reflect(self: Box<NonNilUuid>) -> Box<dyn PartialReflect>

Casts this type to a boxed, reflected value.

fn as_partial_reflect(&self) -> &(dyn PartialReflect + 'static)

Casts this type to a reflected value.

fn as_partial_reflect_mut(&mut self) -> &mut (dyn PartialReflect + 'static)

Casts this type to a mutable, reflected value.

fn reflect_hash(&self) -> Option<u64>

Returns a hash of the value (which includes the type).

fn reflect_partial_eq( &self, value: &(dyn PartialReflect + 'static), ) -> Option<bool>

Returns a “partial equality” comparison result.

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

Debug formatter for the value.

fn reflect_clone(&self) -> Result<Box<dyn Reflect>, ReflectCloneError>

Attempts to clone Self using reflection.

fn apply(&mut self, value: &(dyn PartialReflect + 'static))

Applies a reflected value to this value.

fn reflect_clone_and_take<T>(&self) -> Result<T, ReflectCloneError>

where T: 'static, Self: Sized + TypePath,

For a type implementing PartialReflect, combines reflect_clone and take in a useful fashion, automatically constructing an appropriate ReflectCloneError if the downcast fails.

fn reflect_partial_cmp( &self, _value: &(dyn PartialReflect + 'static), ) -> Option<Ordering>

Returns a “partial comparison” result.

fn is_dynamic(&self) -> bool

Indicates whether or not this type is a dynamic type.

impl Reflect for NonNilUuid

fn into_any(self: Box<NonNilUuid>) -> Box<dyn Any>

Returns the value as a Box<dyn Any>.

fn as_any(&self) -> &(dyn Any + 'static)

Returns the value as a &dyn Any.

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Returns the value as a &mut dyn Any.

fn into_reflect(self: Box<NonNilUuid>) -> Box<dyn Reflect>

Casts this type to a boxed, fully-reflected value.

fn as_reflect(&self) -> &(dyn Reflect + 'static)

Casts this type to a fully-reflected value.

fn as_reflect_mut(&mut self) -> &mut (dyn Reflect + 'static)

Casts this type to a mutable, fully-reflected value.

fn set(&mut self, value: Box<dyn Reflect>) -> Result<(), Box<dyn Reflect>>

Performs a type-checked assignment of a reflected value to this value.

impl Serialize for NonNilUuid

fn serialize<S>( &self, serializer: S, ) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<Uuid> for NonNilUuid

fn try_from( uuid: Uuid, ) -> Result<NonNilUuid, <NonNilUuid as TryFrom<Uuid>>::Error>

Attempts to convert a Uuid into a NonNilUuid.

Examples

let uuid = Uuid::from_u128(0x0123456789abcdef0123456789abcdef);
let non_nil = NonNilUuid::try_from(uuid).unwrap();

type Error = Error

The type returned in the event of a conversion error.

impl TypePath for NonNilUuid

fn type_path() -> &'static str

Returns the fully qualified path of the underlying type.

fn short_type_path() -> &'static str

Returns a short, pretty-print enabled path to the type.

fn type_ident() -> Option<&'static str>

Returns the name of the type, or None if it is anonymous.

fn crate_name() -> Option<&'static str>

Returns the name of the crate the type is in, or None if it is anonymous.

fn module_path() -> Option<&'static str>

Returns the path to the module the type is in, or None if it is anonymous.

impl Typed for NonNilUuid

fn type_info() -> &'static TypeInfo

Returns the compile-time info for the underlying type.

impl Copy for NonNilUuid

impl Eq for NonNilUuid

impl StructuralPartialEq for NonNilUuid