public override LispNode Operate(LispEnvironment env, LispNode node)
{
if (node.Nested.Count != 1)
{
return(new LispTooManyArgsException(Contents, 1, node.Nested.Count));
}
var dnode = node.Nested[0] as LispDataList;
if (dnode == null)
{
return(new LispIncorrectArgTypesException(Contents, 0, LispNodeType.DATALIST.ToString(), node.NodeType.ToString()));
}
if (dnode.Nested.Count == 0)
{
return(new LispEmptyDataException(Contents));
}
var result = dnode;
result.Pop();
return(result);
}
public static LispEnvironment GetEnvironment()
{
var env = new LispEnvironment(null);
env.Env = GetBuiltInFunctions();
return(env);
}
public override LispNode Operate(LispEnvironment env, LispNode node)
{
if (node.Nested.Count != 2)
{
return(new LispTooManyArgsException(Contents, 2, node.Nested.Count));
}
var f = node.Pop() as LispDataList;
if (f == null)
{
return(new LispIncorrectArgTypesException(Contents, 0, LispNodeType.DATALIST.ToString(), node.Nested[0].NodeType.ToString()));
}
var b = node.Pop() as LispDataList;
if (b == null)
{
return(new LispIncorrectArgTypesException(Contents, 0, LispNodeType.DATALIST.ToString(), node.Nested[1].NodeType.ToString()));
}
node.Nested.Clear();
if (!f.Nested.All(n => n is InputSymbol))
{
return(new LispNonSymbolException(Contents));
}
return(new UserDefinedFunction(f, b));
}
public override LispNode Operate(LispEnvironment env, LispNode node)
{
LispNode err = null;
if (LispNumberUtils.CheckIfAllNumbers(node, out err))
{
return(err);
}
var a = node.Pop() as LispNumber;
if (node.Nested.Count == 0)
{
a.Number = -a.Number;
}
else
{
while (node.Nested.Count > 0)
{
var b = node.Pop() as LispNumber;
a.Number -= b.Number;
}
}
return(a);
}
public virtual LispNode CallFunction(LispEnvironment env, LispNode node)
{
if (Apply != null)
{
return(Apply(env, node));
}
else
{
return(new LispNotSymbolException());
}
}
public LispEnvironment GetCopy()
{
var en = new LispEnvironment(parentEnv);
foreach (KeyValuePair <string, LispNode> entry in Env)
{
en.Env.Add(entry.Key, entry.Value.GetNodeCopy());
}
return(en);
}
public override LispNode Operate(LispEnvironment env, LispNode node)
{
var dnode = node as LispList;
if (dnode == null)
{
return(new LispIncorrectArgTypesException(Contents, 0, LispNodeType.LIST.ToString(), node.NodeType.ToString()));
}
return(new LispDataList {
Nested = dnode.Nested
});
}
public static LispNode Evaluate(LispEnvironment env, LispNode node)
{
if (node is InputSymbol)
{
return(env.Get(((InputSymbol)node).Symbol));
}
if (node is LispList)
{
return(EvaluateExpr(env, node));
}
return(node);
}
public override LispNode Operate(LispEnvironment env, LispNode node)
{
if (!node.Nested.All(item => item is LispDataList))
{
node.Nested.Clear();
return(new LispNotDataListException(Contents));
}
var x = node.Pop();
while (node.Nested.Count > 0)
{
x = LispNodeUtils.Join(x, node.Pop());
}
return(x);
}
public override LispNode CallFunction(LispEnvironment env, LispNode node)
{
int given = node.Nested.Count;
int total = formals.Nested.Count;
while (node.Nested.Count > 0)
{
if (formals.Nested.Count == 0)
{
return(new LispTooManyArgsException(Contents, total, given));
}
var sym = formals.Pop() as InputSymbol;
var val = node.Pop();
FuncEnv.Add(sym.Symbol, val);
}
node.Nested.Clear();
if (formals.Nested.Count == 0)
{
FuncEnv.parentEnv = env;
return(Interpreter.Evaluate(FuncEnv, new LispList {
Nested = body.GetNodeCopy().Nested
}));
}
else
{
return(GetNodeCopy());
}
// int index = 0;
// node.Nested.ForEach(n => {
// var sym = formals.Nested[index++] as InputSymbol;
// FuncEnv.Add(sym.Symbol,n);
// });
// node.Nested.Clear();
// FuncEnv.parentEnv = env;
}
public override LispNode Operate(LispEnvironment env, LispNode node)
{
if (node.Nested.Count != 1)
{
return(new LispTooManyArgsException(Contents, 1, node.Nested.Count));
}
var dnode = node.Take(0) as LispDataList;
if (dnode == null)
{
return(new LispIncorrectArgTypesException(Contents, 0, LispNodeType.DATALIST.ToString(), node.NodeType.ToString()));
}
var x = new LispList {
Nested = dnode.GetNodeCopy().Nested
};
return(Interpreter.Evaluate(env, x));
}
public override LispNode Operate(LispEnvironment env, LispNode node)
{
LispNode err = null;
if (LispNumberUtils.CheckIfAllNumbers(node, out err))
{
return(err);
}
var a = node.Pop() as LispNumber;
while (node.Nested.Count > 0)
{
var b = node.Pop() as LispNumber;
if (b.Number == 0)
{
return(new LispDivideByZeroException());
}
a.Number /= b.Number;
}
return(a);
}
public override LispNode Operate(LispEnvironment env, LispNode node)
{
var dnode = node.Nested[0] as LispDataList;
var defs = node.Nested.Skip(0).ToList();
if (dnode == null)
{
return(new LispIncorrectArgTypesException(Contents, 0, LispNodeType.DATALIST.ToString(), node.NodeType.ToString()));
}
if (!dnode.Nested.All(n => n is InputSymbol))
{
return(new LispNonSymbolException(Contents));
}
if (dnode.Nested.Count != node.Nested.Count - 1)
{
return(new LispIncorrectNumberToDefineException(Contents));
}
int index = 1;
dnode.Nested.ForEach((n) => {
var sym = n as InputSymbol;
if (GlobalAssign)
{
env.AddGlobal(sym.Symbol, node.Nested[index++]);
}
else
{
env.Add(sym.Symbol, node.Nested[index++]);
}
});
return(new LispList());
}
private static LispNode EvaluateExpr(LispEnvironment env, LispNode node)
{
node.Nested = node
.Nested
.ConvertAll(item => Evaluate(env, item));
if (node.Nested.Any(item => item is LispError))
{
var item = node.Nested.First(err => err is LispError);
node.Nested.Clear();
return(item);
}
// Empty Expression
if (node.Nested.Count == 0)
{
return(node);
}
// Single value expression
if (node.Nested.Count == 1)
{
return(node.Take(0));
}
var op = node.Pop() as LispFunction;
if (op == null)
{
node.Nested.Clear();
return(new LispNotSymbolException());
}
return(op.CallFunction(env, node));
}
public UserDefinedFunction(UserDefinedFunction fn)
{
FuncEnv = fn.FuncEnv;
formals = fn.formals;
body = fn.body;
}
public UserDefinedFunction(LispNode _formals, LispNode _body)
{
FuncEnv = new LispEnvironment(null);
formals = _formals;
body = _body;
}
public override LispNode Operate(LispEnvironment env, LispNode a)
{
Console.WriteLine(a);
return(a);
}
public LispEnvironment(LispEnvironment parent)
{
parentEnv = parent;
}
public abstract LispNode Operate(LispEnvironment env, LispNode a);
