Enum Patch 

pub enum Patch<T> {
    Ignore,
    Update(T),
}

Represents a potential update to a value, either providing a new value or explicitly indicating that the value should be ignored/unchanged.

This is useful in PATCH-style updates where some fields should be updated while others remain unchanged. Unlike Option, Patch makes the intent to ignore a value explicit.

Variants

Ignore

Explicitly indicates that the existing value should remain unchanged

Update(T)

Contains a value that should replace the existing value

Implementations

impl<T> Patch<T>

pub const fn update(value: T) -> Self

Creates a new Patch variant that will update to the given value

pub const fn ignore() -> Self

Creates a new Patch::Ignore variant indicating no update should occur

pub const fn is_ignore(&self) -> bool

pub const fn as_ref(&self) -> Patch<&T>

Returns a new Patch that references the inner value without taking ownership

pub const fn as_option_ref(&self) -> Option<&T>

Converts the Patch into an Option that borrows the inner value

pub fn as_option(&self) -> Option<T>

where T: Clone,

Converts the Patch into an Option containing a clone of the inner value

pub fn into_option(self) -> Option<T>

Converts the Patch into an Option, consuming self

Trait Implementations

impl<T: Clone> Clone for Patch<T>

fn clone(&self) -> Patch<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Patch<T>

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

Formats the value using the given formatter.

impl<T> Default for Patch<T>

fn default() -> Patch<T>

Returns the “default value” for a type.

impl<'de, T> Deserialize<'de> for Patch<T>

where T: Deserialize<'de>,

fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<T> From<Option<T>> for Patch<T>

fn from(value: Option<T>) -> Self

Converts to this type from the input type.

impl<T> From<Patch<T>> for Option<T>

fn from(value: Patch<T>) -> Self

Converts to this type from the input type.

impl<T: Hash> Hash for Patch<T>

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

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<T: Ord> Ord for Patch<T>

fn cmp(&self, other: &Patch<T>) -> 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<T> PartialEq<Option<T>> for Patch<T>

where T: PartialEq,

fn eq(&self, other: &Option<T>) -> 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<T: PartialEq> PartialEq for Patch<T>

fn eq(&self, other: &Patch<T>) -> 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<T: PartialOrd> PartialOrd for Patch<T>

fn partial_cmp(&self, other: &Patch<T>) -> 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<T> Serialize for Patch<T>

where T: Serialize,

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

where S: Serializer,

Serialize this value into the given Serde serializer.

impl<T: Eq> Eq for Patch<T>

impl<T> StructuralPartialEq for Patch<T>