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PrefixedState

Struct PrefixedState 

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pub struct PrefixedState<'a> { /* private fields */ }
Expand description

A borrowed view of state that automatically prepends a prefix to all keys.

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impl<'a> PrefixedState<'a>

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pub fn get<T: DeserializeOwned>(&self, key: &str) -> Option<T>

Get a value by key (with prefix applied).

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pub fn get_raw(&self, key: &str) -> Option<Value>

Get a raw JSON value by key (with prefix applied).

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pub fn with<F, R>(&self, key: &str, f: F) -> Option<R>
where F: FnOnce(&Value) -> R,

Zero-copy borrow a value by key (with prefix applied).

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pub fn set(&self, key: impl AsRef<str>, value: impl Serialize)

Set a value by key (with prefix applied).

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pub fn contains(&self, key: &str) -> bool

Check if a key exists (with prefix applied).

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pub fn remove(&self, key: &str) -> Option<Value>

Remove a key (with prefix applied).

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pub fn keys(&self) -> Vec<String>

Get all keys within this prefix scope (prefix stripped from results).

Auto Trait Implementations§

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impl<'a> Freeze for PrefixedState<'a>

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impl<'a> !RefUnwindSafe for PrefixedState<'a>

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impl<'a> Send for PrefixedState<'a>

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impl<'a> Sync for PrefixedState<'a>

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impl<'a> Unpin for PrefixedState<'a>

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impl<'a> UnsafeUnpin for PrefixedState<'a>

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impl<'a> !UnwindSafe for PrefixedState<'a>

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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented 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, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

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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.
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impl<V, T> VZip<V> for T
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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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

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