Enum Setting

pub enum Setting<T> {
    Set(T),
    Reset,
    NotSet,
}

Variants

Set(T)

Reset

NotSet

Implementations

impl<T> Setting<T>

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

pub fn some_or_not_set(option: Option<T>) -> Self

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

pub const fn is_not_set(&self) -> bool

pub fn or_reset(self, val: T) -> Self

If Self is Reset, then map self to Set with the provided val.

pub fn or(self, other: Self) -> Self

Returns other if self is not set.

pub fn apply(&mut self, new: Self) -> bool

where T: PartialEq + Eq,

Returns true if applying the new setting changed this setting

Trait Implementations

impl<T: Clone> Clone for Setting<T>

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

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for Setting<T>

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

Formats the value using the given formatter.

impl<T> Default for Setting<T>

fn default() -> Self

Returns the “default value” for a type.

impl<'de, T: Deserialize<'de>> Deserialize<'de> for Setting<T>

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

where D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<T, E> Deserr<E> for Setting<T>

where T: Deserr<E>, E: DeserializeError,

fn deserialize_from_value<V: IntoValue>( value: Value<V>, location: ValuePointerRef<'_>, ) -> Result<Self, E>

Attempts to deserialize Self from the given value. Note that this method is an implementation detail. You probably want to use the deserialize function directly instead.

impl<T: PartialEq> PartialEq for Setting<T>

fn eq(&self, other: &Setting<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: Serialize> Serialize for Setting<T>

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

where S: Serializer,

Serialize this value into the given Serde serializer.

impl<T: Copy> Copy for Setting<T>

impl<T: Eq> Eq for Setting<T>

impl<T> StructuralPartialEq for Setting<T>