public Cons(LispObject car, LispObject cdr)
{
// todo1[ak] check args
this.Car = new Place(car);
this.Cdr = new Place(cdr);
}
public Variable(string name, LispObject initialValue)
{
// todo1[ak] check args
// todo1[ak] check upper-case
// todo1[ak] internal ctor?
this.Name = name;
this.Value = initialValue;
}
public override void AddObject(LispObject obj)
{
if (obj == null)
{
throw new ArgumentNullException("obj");
}
if (this.IsClosed)
{
throw new ApplicationException(); // todo2[ak]
}
this.Close();
_innerCons.Car.Value = obj;
}
public static bool Eq(LispObject el1, LispObject el2)
{
bool eq;
if (el1 is Number)
{
eq =
el2 is Number &&
el1.ToString() == el2.ToString();
}
else
{
throw new NotImplementedException();
}
return eq;
}
public LispObject EvaluateSingle(LispObject obj, Context context)
{
// todo1[ak] check args
Machine machine = this.Env.Machine;
Routine main = new Routine("main", new Instruction[] { new EvalInstruction(), });
machine.Load(main);
machine.SetRegisterValue(RegisterName.EvForm, obj);
machine.Exec();
LispObject res = machine.GetRegisterValue(RegisterName.EvRes);
return res;
}
public string Write(LispObject obj)
{
// todo1[ak] args
string res;
if (obj is Atom)
{
res = obj.ToString();
}
else if (obj is Cons)
{
res = this.WriteCons((Cons)obj);
}
else
{
throw new ApplicationException(); // todo2[ak]
}
return res;
}
public static int GetLengthOfNormalList(LispObject obj)
{
int len = 0;
if (obj == Symbol.Nil)
{
// ok
}
else if (obj is Cons)
{
Cons cons = (Cons)obj;
while (true)
{
len++;
LispObject cdr = cons.Cdr.Value;
if (cdr == Symbol.Nil)
{
break;
}
else if (cdr is Cons)
{
cons = (Cons)cdr;
}
else
{
throw new ApplicationException(); // todo2[ak]
}
}
}
else
{
throw new ApplicationException(); // todo2[ak]
}
return len;
}
public override void AddObject(LispObject obj)
{
if (obj == null)
{
throw new ArgumentNullException("obj");
}
if (this.IsClosed)
{
throw new ApplicationException(); // todo2[ak]
}
if (this.ClosedDot)
{
throw new ApplicationException(); // todo2[ak] (a b c . d e) <-- e is wrong!
}
if (this.OpenedDot)
{
_curr.Cdr.Value = obj;
this.ClosedDot = true;
}
else
{
Cons newCons = new Cons(obj, Symbol.Nil);
if (_head == null)
{
_head = newCons;
_curr = _head;
}
else
{
_curr.Cdr.Value = newCons;
_curr = newCons;
}
}
}
public Place(LispObject initialValue)
{
// todo1[ak] check args
this.Value = initialValue;
}
public static Cons MakeQuote(LispObject quoted)
{
Cons cons = new Cons(Symbol.Quote, new Cons(quoted, Symbol.Nil));
return cons;
}
public static Cons MakeFunction(LispObject lambda)
{
Cons cons = new Cons(Symbol.Function, new Cons(lambda, Symbol.Nil));
return cons;
}
public static List<LispObject> LispObjectToArguments(LispObject args)
{
// todo1[ak] check not null
List<LispObject> list = new List<LispObject>();
LispObject curr = args;
while (curr != Symbol.Nil)
{
if (curr is Cons)
{
Cons cons = (Cons)curr;
list.Add(cons.Car.Value);
curr = cons.Cdr.Value;
}
else
{
throw new ApplicationException("cannot make args"); // todo1[ak]
}
}
return list;
}
public void SetRegisterValue(RegisterName registerName, LispObject value)
{
// todo1[ak] check args
_registers[registerName] = value;
}
public void SetVariable(string name, LispObject value)
{
Variable v = new Variable(name, value);
_variables[v.Name] = v;
}
public LispObject EvaluateObject(LispObject obj, Context context)
{
LispObject res = _evaluator.EvaluateSingle(obj, context);
return res;
}
private void Push(LispObject obj)
{
_stack.Push(obj);
}
public abstract void AddObject(LispObject obj);
public static LispObject GetNthElementOfNormalList(int index, LispObject obj)
{
if (obj == null)
{
throw new ArgumentNullException("obj");
}
if (index < 0)
{
throw new ArgumentOutOfRangeException("index");
}
LispObject res;
if (obj == Symbol.Nil)
{
res = Symbol.Nil;
}
else
{
if (obj is Cons)
{
Cons cons = (Cons)obj;
if (index == 0)
{
res = cons.Car.Value;
}
else
{
res = GetNthElementOfNormalList(index - 1, cons.Cdr.Value);
}
}
else
{
throw new ApplicationException(); // todo2[ak]
}
}
return res;
}
//public LispObject EvaluateFunction(Function f, List<LispObject> args, Context context)
//{
// LispObject res = _evaluator.EvaluateFunction(f, args, context);
// return res;
//}
//public void AddSpecialForm(SpecialForm form)
//{
// // todo1[ak] check that Env is mine
// _specialForms[form.Name] = form;
//}
//public void AddFunction(Function f)
//{
// // todo1[ak] check that Env is mine
// _functions[f.Name] = f;
//}
public void AddVariable(string varName, LispObject value)
{
// todo1[ak] check args
varName = varName.ToUpper(); // todo1[ak] deal with constants, system variables etc
_rootContext.SetVariable(varName, value);
}