/// <summary>
/// Like <see cref="Find"/> but if the variable belongs to another strong scope than the current one, it is registered
/// in the Closures of its strong scope.
/// </summary>
/// <param name="name">Name in the scope.</param>
/// <returns>Null if not found.</returns>
public AccessorLetExpr FindAndRegisterClosure(string name)
{
NameEntry t;
if (_vars.TryGetValue(name, out t))
{
if (t.Next != null)
{
t = t.Next;
}
if (t.Scope.StrongScope != _currentStrongScope)
{
_currentStrongScope.AddClosure(t.E);
}
return(t.E);
}
return(null);
}
