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Context

Struct Context 

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pub struct Context {
    pub custom: HashMap<String, Box<dyn Any + Send + Sync>>,
    pub refs: HashMap<String, Arc<Node>>,
    pub err: Vec<FieldError>,
    /* private fields */
}
Expand description

The caller’s context: per-call state custom validators may share, and the definitions Define records for Refer.

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§custom: HashMap<String, Box<dyn Any + Send + Sync>>

Anything a validator wants to keep across nodes: a counter, a handle, a domain object. Type-erased, as TypeScript takes any property and Go a map[string]any.

§refs: HashMap<String, Arc<Node>>

The nodes Define recorded during this call.

§err: Vec<FieldError>

The errors of the call, when the caller asked for them.

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impl Context

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pub fn new() -> Context

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pub fn get<T: 'static>(&self, key: &str) -> Option<&T>

A typed read of custom.

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pub fn set<T: Any + Send + Sync>(&mut self, key: &str, value: T)

A typed write to custom.

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impl Default for Context

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fn default() -> Context

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

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

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type Error = !

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

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.