fn topological_sort(&self) -> Vec<&str> {
        let mut num_deps = BTreeMap::new();
        let mut rev_deps: BTreeMap<_, Vec<_>> = BTreeMap::new();
        for (table, config) in self.0.iter() {
            num_deps.insert(table.as_str(), config.dependencies.len());
            for dep in &config.dependencies {
                rev_deps
                    .entry(dep.as_str())
                    .or_default()
                    .push(table.as_str());
            }
        }
        let mut ready: VecDeque<&str> = num_deps
            .iter()
            .filter(|(_, &count)| count == 0)
            .map(|(&table, _)| table)
            .collect();
        let mut result = Vec::with_capacity(ready.len());
        while let Some(table) = ready.pop_front() {
            result.push(table);
            for dep in rev_deps.get(table).iter().cloned().flatten() {
                *num_deps.get_mut(dep).unwrap() -= 1;
                if num_deps[dep] == 0 {
                    ready.push_back(dep);
                }
            }
        }
        assert_eq!(
            self.0.len(),
            result.len(),
            "circular dependencies in database dump configuration detected",
        );
        result
    }
/// Sort the tables in a way that dependencies come before dependent tables.
///
/// Returns a vector of table names.
Sort the tables in a way that dependencies come before dependent tables.
Returns a vector of table names.
Sort the tables in a way that dependencies come before dependent tables . Returns a vector of table names .
fn topological_sort(&self) -> Vec<&str> {
        let mut num_deps = BTreeMap::new();
        let mut rev_deps: BTreeMap<_, Vec<_>> = BTreeMap::new();
        for (table, config) in self.0.iter() {
            num_deps.insert(table.as_str(), config.dependencies.len());
            for dep in &config.dependencies {
                rev_deps
                    .entry(dep.as_str())
                    .or_default()
                    .push(table.as_str());
            }
        }
        let mut ready: VecDeque<&str> = num_deps
            .iter()
            .filter(|(_, &count)| count == 0)
            .map(|(&table, _)| table)
            .collect();
        let mut result = Vec::with_capacity(ready.len());
        while let Some(table) = ready.pop_front() {
            result.push(table);
            for dep in rev_deps.get(table).iter().cloned().flatten() {
                *num_deps.get_mut(dep).unwrap() -= 1;
                if num_deps[dep] == 0 {
                    ready.push_back(dep);
                }
            }
        }
        assert_eq!(
            self.0.len(),
            result.len(),
            "circular dependencies in database dump configuration detected",
        );
        result
    }
fn topological_sort ( & self ) -> Vec < & str > { let mut num_deps = BTreeMap :: new ( ) ; let mut rev_deps : BTreeMap < _ , Vec < _ > > = BTreeMap :: new ( ) ; for ( table , config ) in self . 0 . iter ( ) { num_deps . insert ( table . as_str ( ) , config . dependencies . len ( ) ) ; for dep in & config . dependencies { rev_deps . entry ( dep . as_str ( ) ) . or_default ( ) . push ( table . as_str ( ) ) ; } } let mut ready : VecDeque < & str > = num_deps . iter ( ) . filter ( | ( _ , & count ) | count == 0 ) . map ( | ( & table , _ ) | table ) . collect ( ) ; let mut result = Vec :: with_capacity ( ready . len ( ) ) ; while let Some ( table ) = ready . pop_front ( ) { result . push ( table ) ; for dep in rev_deps . get ( table ) . iter ( ) . cloned ( ) . flatten ( ) { * num_deps . get_mut ( dep ) . unwrap ( ) -= 1 ; if num_deps [ dep ] == 0 { ready . push_back ( dep ) ; } } } assert_eq ! ( self 0 len ( ) result len ( ) " " ) ; result }
Sort the tables in a way that dependencies come before dependent tables.
Sort the tables in a way that dependencies come before dependent tables .
&self