pub async fn capture(mut self, capture: Id) -> TCResult<State> {
        debug!("execute op & capture {}", capture);

        while self.scope.resolve_id(&capture)?.is_ref() {
            let mut pending = Vec::with_capacity(self.scope.len());
            let mut unvisited = VecDeque::with_capacity(self.scope.len());
            unvisited.push_back(capture.clone());

            while let Some(id) = unvisited.pop_front() {
                let state = self.scope.resolve_id(&id)?;
                debug!("checking state {}: {}", id, state);

                if state.is_ref() {
                    let mut deps = HashSet::new();
                    state.requires(&mut deps);

                    if deps.contains(&id) {
                        return Err(TCError::bad_request("circular dependency", id));
                    }

                    let mut ready = true;
                    for dep_id in deps.into_iter() {
                        if self.scope.resolve_id(&dep_id)?.is_ref() {
                            ready = false;
                            unvisited.push_back(dep_id);
                        }
                    }

                    if ready {
                        debug!("all deps resolved for {}", state);
                        pending.push(id);
                    } else {
                        debug!("{} still has unresolved deps", id);
                    }
                } else {
                    debug!("{} already resolved: {}", id, state);
                }
            }

            if pending.is_empty() && self.scope.resolve_id(&capture)?.is_ref() {
                return Err(TCError::bad_request(
                    "cannot resolve all dependencies of",
                    capture,
                ));
            }

            let mut resolved = HashMap::with_capacity(pending.len());
            {
                let mut providers = FuturesUnordered::new();
                for id in pending.into_iter() {
                    debug!("enqueue {}", id);
                    let state = self.scope.resolve_id(&id)?;
                    debug!("provider for {} is {}", id, state);
                    providers.push(
                        state
                            .clone()
                            .resolve(&self.scope, &self.txn)
                            .map(|r| (id, r)),
                    );
                }

                while let Some((id, r)) = providers.next().await {
                    match r {
                        Ok(state) => {
                            debug!("{} resolved to {}", id, state);
                            resolved.insert(id, state);
                        }
                        Err(cause) => return Err(cause.consume(format!("while resolving {}", id))),
                    }
                }
            }

            self.scope.extend(resolved);
        }

        self.scope.remove(&capture).ok_or_else(|| {
            let msg = format!(
                "captured state {} in context {}",
                capture,
                self.scope.keys().collect::<Tuple<&Id>>()
            );
            TCError::not_found(msg)
        })
    }
/// Resolve the state of the variable `capture`, including any of its dependencies.
Resolve the state of the variable `capture`, including any of its dependencies.
Resolve the state of the variable ` capture ` including any of its dependencies .
pub async fn capture(mut self, capture: Id) -> TCResult<State> {
        debug!("execute op & capture {}", capture);
        while self.scope.resolve_id(&capture)?.is_ref() {
            let mut pending = Vec::with_capacity(self.scope.len());
            let mut unvisited = VecDeque::with_capacity(self.scope.len());
            unvisited.push_back(capture.clone());
            while let Some(id) = unvisited.pop_front() {
                let state = self.scope.resolve_id(&id)?;
                debug!("checking state {}: {}", id, state);
                if state.is_ref() {
                    let mut deps = HashSet::new();
                    state.requires(&mut deps);
                    if deps.contains(&id) {
                        return Err(TCError::bad_request("circular dependency", id));
                    }
                    let mut ready = true;
                    for dep_id in deps.into_iter() {
                        if self.scope.resolve_id(&dep_id)?.is_ref() {
                            ready = false;
                            unvisited.push_back(dep_id);
                        }
                    }
                    if ready {
                        debug!("all deps resolved for {}", state);
                        pending.push(id);
                    } else {
                        debug!("{} still has unresolved deps", id);
                    }
                } else {
                    debug!("{} already resolved: {}", id, state);
                }
            }
            if pending.is_empty() && self.scope.resolve_id(&capture)?.is_ref() {
                return Err(TCError::bad_request(
                    "cannot resolve all dependencies of",
                    capture,
                ));
            }
            let mut resolved = HashMap::with_capacity(pending.len());
            {
                let mut providers = FuturesUnordered::new();
                for id in pending.into_iter() {
                    debug!("enqueue {}", id);
                    let state = self.scope.resolve_id(&id)?;
                    debug!("provider for {} is {}", id, state);
                    providers.push(
                        state
                            .clone()
                            .resolve(&self.scope, &self.txn)
                            .map(|r| (id, r)),
                    );
                }
                while let Some((id, r)) = providers.next().await {
                    match r {
                        Ok(state) => {
                            debug!("{} resolved to {}", id, state);
                            resolved.insert(id, state);
                        }
                        Err(cause) => return Err(cause.consume(format!("while resolving {}", id))),
                    }
                }
            }
            self.scope.extend(resolved);
        }
        self.scope.remove(&capture).ok_or_else(|| {
            let msg = format!(
                "captured state {} in context {}",
                capture,
                self.scope.keys().collect::<Tuple<&Id>>()
            );
            TCError::not_found(msg)
        })
    }
pub async fn capture ( mut self , capture : Id ) -> TCResult < State > { debug ! ( " " capture ) ; while self . scope . resolve_id ( & capture ) ? . is_ref ( ) { let mut pending = Vec :: with_capacity ( self . scope . len ( ) ) ; let mut unvisited = VecDeque :: with_capacity ( self . scope . len ( ) ) ; unvisited . push_back ( capture . clone ( ) ) ; while let Some ( id ) = unvisited . pop_front ( ) { let state = self . scope . resolve_id ( & id ) ? ; debug ! ( " " id state ) ; if state . is_ref ( ) { let mut deps = HashSet :: new ( ) ; state . requires ( & mut deps ) ; if deps . contains ( & id ) { return Err ( TCError :: bad_request ( " " , id ) ) ; } let mut ready = true ; for dep_id in deps . into_iter ( ) { if self . scope . resolve_id ( & dep_id ) ? . is_ref ( ) { ready = false ; unvisited . push_back ( dep_id ) ; } } if ready { debug ! ( " " state ) ; pending . push ( id ) ; } else { debug ! ( " " id ) ; } } else { debug ! ( " " id state ) ; } } if pending . is_empty ( ) && self . scope . resolve_id ( & capture ) ? . is_ref ( ) { return Err ( TCError :: bad_request ( " " , capture , ) ) ; } let mut resolved = HashMap :: with_capacity ( pending . len ( ) ) ; { let mut providers = FuturesUnordered :: new ( ) ; for id in pending . into_iter ( ) { debug ! ( " " id ) ; let state = self . scope . resolve_id ( & id ) ? ; debug ! ( " " id state ) ; providers . push ( state . clone ( ) . resolve ( & self . scope , & self . txn ) . map ( | r | ( id , r ) ) , ) ; } while let Some ( ( id , r ) ) = providers . next ( ) . await { match r { Ok ( state ) => { debug ! ( " " id state ) ; resolved . insert ( id , state ) ; } Err ( cause ) => return Err ( cause . consume ( format ! ( " " id ) ) ) , } } } self . scope . extend ( resolved ) ; } self . scope . remove ( & capture ) . ok_or_else ( | | { let msg = format ! ( " " capture self scope keys ( ) collect Tuple Id ( ) ) ; TCError :: not_found ( msg ) } ) }
Resolve the state of the variable `capture`, including any of its dependencies.
Resolve the state of the variable ` capture ` including any of its dependencies .
mut self
capture
Id
mut self
capture
Id