public int Eval(RuntimeEnvironment runtimeEnvironment, FunctionEnvironment functionEnvironment, int argument)
{
runtimeEnvironment.AllocateLocal(_argument.Item1);
runtimeEnvironment.GetVariable(_argument.Item1).Value = argument;
var v = _body.Eval(runtimeEnvironment, functionEnvironment);
runtimeEnvironment.Pop();
return v;
}
public override int Eval(RuntimeEnvironment env, FunctionEnvironment fEnv)
{
int value = e1.Eval(env, fEnv);
env.AllocateLocal(name); // It pushes a new Pair<String, Storage>(name, new Storage()) to the stack called locals. The Storage value is 0 or null the String name is the type the storage.value is the value.
Storage storage = env.GetVariable(name); // this method returns a Storage object. The storage variable that we create here, is pointing to the same object as the other Storage variable in the Stack<Pair<String, Storage> locals.
storage.Value = value; // The Storage has only a value field. If we modify the value of this Storage variable, the value of the object will be modofied.
int result = e2.Eval(env, fEnv);
env.Pop();
return(result);
}
public int Eval(RuntimeEnvironment env, FunctionEnvironment fenv, int[] values)
{
if (args.Count > 0)
{
int index = 0;
foreach (Tuple <string, Type> tuple in args)
{
env.AllocateLocal(tuple.Item1);
env.GetVariable(tuple.Item1).Value = values[index++];
}
int v = body.Eval(env, fenv);
foreach (Tuple <string, Type> tuple in args)
{
env.Pop();
}
return(v);
}
else
{
int v = body.Eval(env, fenv);
return(v);
}
}