fn collect_children(
        tree: &HashTree,
        path: &mut Vec<Label>,
        map: &mut FlatMap<Label, LabeledTree<Digest>>,
    ) -> Result<(), TreeHashError> {
        match tree {
            HashTree::Leaf { .. } => Err(TreeHashError::InvalidArgument {
                info: format!(
                    "subtree leaf without a node at path {}",
                    path_as_string(path)
                ),
            }),

            HashTree::Node {
                label, hash_tree, ..
            } => {
                path.push(label.clone());
                let child = labeled_tree_from_hashtree(hash_tree, path)?;
                path.pop();
                map.try_append(label.clone(), child)
                    .map_err(|_| TreeHashError::InvalidArgument {
                        info: format!(
                            "non-sorted labels in a subtree at path {}",
                            path_as_string(path)
                        ),
                    })
            }

            HashTree::Fork {
                ref left_tree,
                ref right_tree,
                ..
            } => {
                collect_children(left_tree, path, map)?;
                collect_children(right_tree, path, map)
            }
        }
    }
/// Traverses the first level of labeled Nodes reacheable from the specified
/// tree root, recursively converts those into labeled trees and
/// collects them into a map indexed by the corresponding label.
Traverses the first level of labeled Nodes reacheable from the specified
tree root, recursively converts those into labeled trees and
collects them into a map indexed by the corresponding label.
Traverses the first level of labeled Nodes reacheable from the specified tree root recursively converts those into labeled trees and collects them into a map indexed by the corresponding label .
fn collect_children(
        tree: &HashTree,
        path: &mut Vec<Label>,
        map: &mut FlatMap<Label, LabeledTree<Digest>>,
    ) -> Result<(), TreeHashError> {
        match tree {
            HashTree::Leaf { .. } => Err(TreeHashError::InvalidArgument {
                info: format!(
                    "subtree leaf without a node at path {}",
                    path_as_string(path)
                ),
            }),
            HashTree::Node {
                label, hash_tree, ..
            } => {
                path.push(label.clone());
                let child = labeled_tree_from_hashtree(hash_tree, path)?;
                path.pop();
                map.try_append(label.clone(), child)
                    .map_err(|_| TreeHashError::InvalidArgument {
                        info: format!(
                            "non-sorted labels in a subtree at path {}",
                            path_as_string(path)
                        ),
                    })
            }
            HashTree::Fork {
                ref left_tree,
                ref right_tree,
                ..
            } => {
                collect_children(left_tree, path, map)?;
                collect_children(right_tree, path, map)
            }
        }
    }
fn collect_children ( tree : & HashTree , path : & mut Vec < Label > , map : & mut FlatMap < Label , LabeledTree < Digest > > , ) -> Result < ( ) , TreeHashError > { match tree { HashTree :: Leaf { .. } => Err ( TreeHashError :: InvalidArgument { info : format ! ( " " path_as_string ( path ) ) , } ) , HashTree :: Node { label , hash_tree , .. } => { path . push ( label . clone ( ) ) ; let child = labeled_tree_from_hashtree ( hash_tree , path ) ? ; path . pop ( ) ; map . try_append ( label . clone ( ) , child ) . map_err ( | _ | TreeHashError :: InvalidArgument { info : format ! ( " " path_as_string ( path ) ) , } ) } HashTree :: Fork { ref left_tree , ref right_tree , .. } => { collect_children ( left_tree , path , map ) ? ; collect_children ( right_tree , path , map ) } } }
Traverses the first level of labeled Nodes reacheable from the specified
tree root, recursively converts those into labeled trees and
collects them into a map indexed by the corresponding label.
Traverses the first level of labeled Nodes reacheable from the specified tree root recursively converts those into labeled trees and collects them into a map indexed by the corresponding label .
tree
&HashTree
path
&mut Vec<Label>
map
&mut FlatMap<Label, LabeledTree<Digest>>
tree
&HashTree
path
&mut Vec<Label>
map
&mut FlatMap<Label, LabeledTree<Digest>>