internal override void Execute(ref int ip, ValueStack valueStack, EnvironmentStack envStack, CallStack callStack)
{
object o = valueStack.Pop();
if (o is Variable) envStack.Set(Symbol, (Variable)o); // Link to variable, e.g. in Closure
else
{
if (envStack.HasVariable(Symbol))
envStack.Get(Symbol).SetValue(o);
else
envStack.Set(Symbol, new Variable(o));
}
ip += Length;
}
