Enum email::backend::feature::BackendFeatureSource

source · 
pub enum BackendFeatureSource<C: BackendContext, F: ?Sized> {
    None,
    Context,
    Backend(BackendFeature<C, F>),
}
Expand description

The backend feature source.

This enum is used by the backend builder to determine where a specific backend feature should be taken from.

Variants§

§

None

The feature should be disabled.

§

Context

The feature should be taken from the super::BackendContextBuilder.

§

Backend(BackendFeature<C, F>)

The feature should be taken from the super::BackendBuilder, using the given feature.

Trait Implementations§

source§

impl<C, F> Clone for BackendFeatureSource<C, F>
where C: BackendContext, F: ?Sized,

source§

fn clone(&self) -> Self

Returns a copy of the value. Read more
1.0.0 · source§

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

Performs copy-assignment from source. Read more
source§

impl<C: BackendContext, F: ?Sized> Default for BackendFeatureSource<C, F>

source§

fn default() -> BackendFeatureSource<C, F>

Returns the “default value” for a type. Read more
source§

impl<C, F, T> From<T> for BackendFeatureSource<C, F>
where C: BackendContext, F: ?Sized, T: Fn(&C) -> Option<Box<F>> + Send + Sync + 'static,

source§

fn from(value: T) -> Self

Converts to this type from the input type.

Auto Trait Implementations§

§

impl<C, F> !RefUnwindSafe for BackendFeatureSource<C, F>

§

impl<C, F: ?Sized> Send for BackendFeatureSource<C, F>

§

impl<C, F: ?Sized> Sync for BackendFeatureSource<C, F>

§

impl<C, F: ?Sized> Unpin for BackendFeatureSource<C, F>

§

impl<C, F> !UnwindSafe for BackendFeatureSource<C, F>

Blanket Implementations§

source§

impl<T> Any for T
where T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
§

impl<Src, Scheme> ApproxFrom<Src, Scheme> for Src
where Scheme: ApproxScheme,

§

type Err = NoError

The error type produced by a failed conversion.
§

fn approx_from(src: Src) -> Result<Src, <Src as ApproxFrom<Src, Scheme>>::Err>

Convert the given value into an approximately equivalent representation.
§

impl<Dst, Src, Scheme> ApproxInto<Dst, Scheme> for Src
where Dst: ApproxFrom<Src, Scheme>, Scheme: ApproxScheme,

§

type Err = <Dst as ApproxFrom<Src, Scheme>>::Err

The error type produced by a failed conversion.
§

fn approx_into(self) -> Result<Dst, <Src as ApproxInto<Dst, Scheme>>::Err>

Convert the subject into an approximately equivalent representation.
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
§

impl<T, Dst> ConvAsUtil<Dst> for T

§

fn approx(self) -> Result<Dst, Self::Err>
where Self: Sized + ApproxInto<Dst>,

Approximate the subject with the default scheme.
§

fn approx_by<Scheme>(self) -> Result<Dst, Self::Err>
where Self: Sized + ApproxInto<Dst, Scheme>, Scheme: ApproxScheme,

Approximate the subject with a specific scheme.
§

impl<T> ConvUtil for T

§

fn approx_as<Dst>(self) -> Result<Dst, Self::Err>
where Self: Sized + ApproxInto<Dst>,

Approximate the subject to a given type with the default scheme.
§

fn approx_as_by<Dst, Scheme>(self) -> Result<Dst, Self::Err>
where Self: Sized + ApproxInto<Dst, Scheme>, Scheme: ApproxScheme,

Approximate the subject to a given type with a specific scheme.
§

fn into_as<Dst>(self) -> Dst
where Self: Sized + Into<Dst>,

Convert the subject to a given type.
§

fn try_as<Dst>(self) -> Result<Dst, Self::Err>
where Self: Sized + TryInto<Dst>,

Attempt to convert the subject to a given type.
§

fn value_as<Dst>(self) -> Result<Dst, Self::Err>
where Self: Sized + ValueInto<Dst>,

Attempt a value conversion of the subject to a given type.
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

§

impl<T> Instrument for T

§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

impl<T, U> Into<U> for T
where U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

§

impl<T> NoneValue for T
where T: Default,

§

type NoneType = T

§

fn null_value() -> T

The none-equivalent value.
§

impl<T> Pointable for T

§

const ALIGN: usize = _

The alignment of pointer.
§

type Init = T

The type for initializers.
§

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
§

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
§

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
§

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
source§

impl<T> Same for T

§

type Output = T

Should always be Self
§

impl<'p, T> Seq<'p, T> for T
where T: Clone,

§

type Item<'a> = &'a T where T: 'a

The item yielded by the iterator.
§

type Iter<'a> = Once<&'a T> where T: 'a

An iterator over the items within this container, by reference.
§

fn seq_iter(&self) -> <T as Seq<'p, T>>::Iter<'_>

Iterate over the elements of the container.
§

fn contains(&self, val: &T) -> bool
where T: PartialEq,

Check whether an item is contained within this sequence.
§

fn to_maybe_ref<'b>(item: <T as Seq<'p, T>>::Item<'b>) -> Maybe<T, &'p T>
where 'p: 'b,

Convert an item of the sequence into a [MaybeRef].
source§

impl<T> ToOwned for T
where T: Clone,

§

type Owned = T

The resulting type after obtaining ownership.
source§

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
source§

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
§

impl<Src> TryFrom<Src> for Src

§

type Err = NoError

The error type produced by a failed conversion.
§

fn try_from(src: Src) -> Result<Src, <Src as TryFrom<Src>>::Err>

Convert the given value into the subject type.
source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
§

impl<Src, Dst> TryInto<Dst> for Src
where Dst: TryFrom<Src>,

§

type Err = <Dst as TryFrom<Src>>::Err

The error type produced by a failed conversion.
§

fn try_into(self) -> Result<Dst, <Src as TryInto<Dst>>::Err>

Convert the subject into the destination type.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
§

impl<V, T> VZip<V> for T
where V: MultiLane<T>,

§

fn vzip(self) -> V

§

impl<Src> ValueFrom<Src> for Src

§

type Err = NoError

The error type produced by a failed conversion.
§

fn value_from(src: Src) -> Result<Src, <Src as ValueFrom<Src>>::Err>

Convert the given value into an exactly equivalent representation.
§

impl<Src, Dst> ValueInto<Dst> for Src
where Dst: ValueFrom<Src>,

§

type Err = <Dst as ValueFrom<Src>>::Err

The error type produced by a failed conversion.
§

fn value_into(self) -> Result<Dst, <Src as ValueInto<Dst>>::Err>

Convert the subject into an exactly equivalent representation.
§

impl<T> WithSubscriber for T

§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a [WithDispatch] wrapper. Read more
§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a [WithDispatch] wrapper. Read more
§

impl<T> MaybeSync for T

§

impl<'p, T> OrderedSeq<'p, T> for T
where T: Clone,