internal static void Add(Identifier identifier, INode node)
{
if (_symbols.ContainsKey(identifier.Name))
_symbols[identifier.Name] = node;
else
_symbols.Add(identifier.Name, node);
}
internal static void Register(Identifier identifier)
{
if (!_symbols.ContainsKey(identifier.Name))
_symbols.Add(identifier.Name, null);
}
private Value(Identifier identifier)
{
_identifier = identifier;
}