petitparser/lib/src/lisp/name.dart

part of lisp;

/**
 * An unique symbolic name.
 */
class Name {

  /** The interned symbols. */
  static final Map<String, Name> _interned = new HashMap();

  /** Factory for new symbol cells. */
  factory Name(String name) {
    return _interned.putIfAbsent(name, () => new Name._internal(name));
  }

  /** The name of the symbol. */
  final String _name;

  /** Internal constructor for symbol. */
  Name._internal(this._name);

  /** Returns the string representation of the symbolic name. */
  String toString() => _name;
}