aws_smithy_types::config_bag

Struct CloneableLayer

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pub struct CloneableLayer(/* private fields */);
Expand description

CloneableLayer allows itself to be cloned. This is useful when a type that implements Clone wishes to store a config layer.

It ensures that all the items in CloneableLayer are Clone upon entry, e.g. when they are first stored, the mutable methods require that they have a Clone bound on them.

While FrozenLayer is also cloneable, which is a shallow clone via Arc, CloneableLayer performs a deep clone that newly allocates all the items stored in it.

Cloneable enforces that non clone items cannot be added

use aws_smithy_types::config_bag::Storable;
use aws_smithy_types::config_bag::StoreReplace;
use aws_smithy_types::config_bag::CloneableLayer;
#[derive(Debug)]
struct MyNotCloneStruct;

impl Storable for MyNotCloneStruct {
    type Storer = StoreReplace<MyNotCloneStruct>;
}
let mut layer = CloneableLayer::new("layer");
layer.store_put(MyNotCloneStruct);

See the module docs for more documentation.

Implementations§

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impl CloneableLayer

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pub fn new(name: impl Into<Cow<'static, str>>) -> Self

Creates a new CloneableLayer with a given name

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pub fn freeze(self) -> FrozenLayer

Converts this layer into a frozen layer that can no longer be mutated.

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pub fn unset<T: Send + Sync + Clone + Debug + 'static>(&mut self) -> &mut Self

Removes T from this bag

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pub fn store_put<T>(&mut self, item: T) -> &mut Self
where T: Storable<Storer = StoreReplace<T>> + Clone,

Stores item of type T into the config bag, overriding a previous value of the same type

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pub fn store_or_unset<T>(&mut self, item: Option<T>) -> &mut Self
where T: Storable<Storer = StoreReplace<T>> + Clone,

Stores item of type T into the config bag, overriding a previous value of the same type, or unsets it by passing a None

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pub fn store_append<T>(&mut self, item: T) -> &mut Self
where T: Storable<Storer = StoreAppend<T>> + Clone,

Stores item of type T into the config bag, appending it to the existing list of the same type

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pub fn clear<T>(&mut self)
where T: Storable<Storer = StoreAppend<T>> + Clone,

Clears the value of type T from the config bag

Methods from Deref<Target = Layer>§

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pub fn is_empty(&self) -> bool

Returns true if this layer is empty.

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pub fn load<T: Storable>(&self) -> <T::Storer as Store>::ReturnedType<'_>

Load a storable item from the bag

Trait Implementations§

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impl Clone for CloneableLayer

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for CloneableLayer

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

Formats the value using the given formatter. Read more
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impl Default for CloneableLayer

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fn default() -> CloneableLayer

Returns the “default value” for a type. Read more
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impl Deref for CloneableLayer

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type Target = Layer

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.
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impl From<CloneableLayer> for Layer

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fn from(cloneable_layer: CloneableLayer) -> Layer

Converts to this type from the input type.

Auto Trait Implementations§

Blanket Implementations§

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

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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

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fn into(self) -> U

Calls U::from(self).

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

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.