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FlowContext

Struct FlowContext 

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

Records calls and latches failures while application code controls sequencing.

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impl<'a> FlowContext<'a>

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pub fn new(provider: &'a dyn Provider) -> Self

Begin an empty trace using a borrowed provider.

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pub async fn ask( &mut self, state: &State, operators: &[NamedQuestion], ) -> Result<FlowAnswers, FlowExit>

Ask independent operators together about one state.

§Errors

Returns FlowExit::Error for an empty batch, duplicate operator names, a previously latched failure, or request/provider/response validation failures. Successful undecided answers remain available for inspection.

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pub async fn ask_request( &mut self, request: &Request, ) -> Result<FlowAnswers, FlowExit>

Ask a request that may carry image assets.

§Errors

Returns FlowExit::Error for a previously latched failure or any error from the checked provider call. A new call failure is retained in the trace and latched so later calls cannot silently proceed.

Dropping this future after it starts retains the attempt and latches ErrorKind::Runtime for interrupted local execution. This does not establish whether remote work stopped or incurred charges. An unpolled future records no attempt.

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pub fn finish<T>( self, result: Result<T, FlowExit>, ) -> Result<FlowOutcome<T>, FlowFailure>

Finish. A caught provider error cannot become successful completion.

§Errors

Returns FlowFailure with the trace when an earlier call failed, a polled request future was dropped before completing, or result contains FlowExit::Error. An uncertainty exit instead becomes a successful FlowOutcome with stopped_at set.

Auto Trait Implementations§

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

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

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impl<'a> Freeze for FlowContext<'a>

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impl<'a> Send for FlowContext<'a>

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impl<'a> Sync for FlowContext<'a>

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impl<'a> Unpin for FlowContext<'a>

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impl<'a> UnsafeUnpin for FlowContext<'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> PolicyExt for T
where T: ?Sized,

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fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Sized + Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow only if self and other return Action::Follow. Read more
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fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Sized + Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more
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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.
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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>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self> ⓘ

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