Assigning a node

Compilers and applications over AS3Parser may need to assign data to nodes. They can do so by using the NodeAssignment mapping, which works just as a hash map, but using an efficient implementation for the different node types and splitting of dictionaries for large compilation units.

use as3_parser::ns::*;

// Construct a NodeAssignment structure, where Entity
// is any Rust type that implements Clone.
let mapping = NodeAssignment::<Entity>::new();

// Retrieve data of a node.
let data = mapping.get(&node);

// Assign data to a node.
mapping.set(&node, data);

// Delete data from a node.
mapping.delete(&node);

// Check whether a node contains data.
let has_data = mapping.has(&node);

Almost every node type that is used behind a Rust Rc container may be used as a node type in NodeAssignment, such as Rc<Expression>, Rc<Directive>, and Rc<FunctionCommon>.