/// <summary>Gets a symbol from this pool, if the name exists already.</summary>
/// <param name="name">Symbol Name to find</param>
/// <returns>Returns the existing Symbol if found; returns null if the name
/// was not found, or if the name itself was null.</returns>
public Symbol GetIfExists(string name)
{
Symbol sym;
if (name == null)
{
return(null);
}
else
{
lock (_map) {
_map.TryGetValue(name, out sym);
if (_weakMap != null)
{
if (_weakMap.AutoCleanup())
{
if (_idMap != null)
{
((WeakValueDictionary <int, Symbol>)_idMap).Cleanup();
}
}
}
return(sym);
}
}
}