Struct Extensions

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pub struct Extensions { /* private fields */ }

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impl Extensions

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pub fn new() -> Self

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pub fn insert<T: Send + Sync + 'static>(&self, val: T) -> InsertEffect

Inserts a new value into the extension map. It will replace any existing value with the same TypeId. Note that any outstanding get/get_arc on the type will not be altered.

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pub fn get<'a, T: Send + Sync + 'static>(&'a self) -> Option<&'a T>

Gets a reference to an extension value. This will invalidate that value from ever being manually removed.

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pub fn get_arc<T: Send + Sync + 'static>(&self) -> Option<Arc<T>>

Gets a reference to an extension value. Since it returns an Arc and tracks it’s deallocation, it does not prevent a value from being manually removed. However, while the Arc is alive, it cannot be removed. Take care that the Arc doesn’t outlive the Request/Response, otherwise there will be a panic.

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pub fn remove<T: Send + Sync + 'static>(&self) -> Option<Removed<T>>

Removes a non-invalidated entry from the Extensions map

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pub fn extend(&self, other: &Extensions)

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impl Clone for Extensions

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fn clone(&self) -> Extensions

Returns a duplicate 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 Extensions

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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 Extensions

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fn default() -> Extensions

Returns the “default value” for a type. Read more
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impl From<Extensions> for Extensions

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fn from(value: Extensions) -> Self

Converts to this type from the input type.

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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, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. 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> FutureExt for T

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fn with_context(self, otel_cx: Context) -> WithContext<Self>

Attaches the provided Context to this type, returning a WithContext wrapper. Read more
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fn with_current_context(self) -> WithContext<Self>

Attaches the current Context to this type, returning a WithContext wrapper. Read more
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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> Same for T

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type Output = T

Should always be Self
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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.