public override void Execute(NetStack stack)
{
dynamic r = stack.Pop();
dynamic l = stack.Pop();
stack.Push(l + r);
//throw new ArgumentException(string.Format("Cannot add operands of type {0} and {1}", l.GetType().Name, r.GetType().Name));
}
public NetStack Evaluate(NetStack stack, string input)
{
var statement = parser.Parse(input);
try
{
statement.Evaluate(stack);
}
catch (Exception e)
{
throw new RuntimeException(e);
}
return stack;
}
public override void Execute(NetStack stack)
{
var condition = stack.Pop<Statement>();
var body = stack.Pop<Statement>();
condition.Evaluate(stack);
var result = stack.Pop<bool>();
while (result)
{
body.Evaluate(stack);
condition.Evaluate(stack);
result = stack.Pop<bool>();
}
}
public void Evaluate(NetStack stack)
{
foreach(var token in Tokens)
{
try
{
token.Execute(stack);
}
catch (StackEmptyException)
{
throw new StackEmptyException(string.Format("\"{0}\" attempted to pop a frame while the stack was empty.", token.GetType().FullName));
}
}
}
public override void Execute(NetStack stack)
{
Statement functionBody;
try
{
functionBody = stack.GetFunction(label);
}
catch (KeyNotFoundException)
{
throw new RuntimeBinderException(string.Format("Failed to call function (no binding for \"{0}\" exists).", label));
}
functionBody.Evaluate(stack);
}
static void Main(string[] args)
{
Console.WriteLine("Welcome to the Netstack REPL.");
var runtime = new NetstackRuntime();
bool quitRequested = false;
NetStack stack = new NetStack();
while (!quitRequested)
{
Console.Write("> ");
var input = Console.ReadLine();
if(input == "quit")
{
quitRequested = true;
}else
{
try
{
stack = runtime.Evaluate(stack.Clear(), input);
var previousColour = Console.ForegroundColor;
Console.ForegroundColor = ConsoleColor.White;
Console.Write("--> ");
Console.WriteLine(stack.ToString());
Console.ForegroundColor = previousColour;
}
catch (RuntimeException e)
{
var previousColour = Console.ForegroundColor;
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Execution halted: " + e.InnerException.Message);
Console.ForegroundColor = previousColour;
}
catch (SyntaxException e)
{
var previousColour = Console.ForegroundColor;
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("Parsing fail: " + e.InnerException.Message);
Console.ForegroundColor = previousColour;
}
}
}
Console.WriteLine("Goodbye");
}
public override void Execute(NetStack stack)
{
var top = stack.Pop();
var bottom = stack.Pop();
stack.Push(top).Push(bottom);
}
public override void Execute(NetStack stack)
{
dynamic r = stack.Pop();
dynamic l = stack.Pop();
stack.Push(l > r);
}
public override void Execute(NetStack stack)
{
var l = stack.Pop();
var r = stack.Pop();
stack.Push(l.Equals(r));
}
public override void Execute(NetStack stack)
{
stack.Clear();
}
public override void Execute(NetStack stack)
{
stack.Pop();
}
public override void Execute(NetStack stack)
{
Console.Write("input> ");
stack.Push(Console.ReadLine());
}
public override void Execute(NetStack stack)
{
var label = stack.Pop<string>();
stack.Push(new FunctionLabel(label));
}
public override void Execute(NetStack stack)
{
var val = stack.Pop();
stack.Push(val).Push(val);
}
public abstract void Execute(NetStack stack);
public override void Execute(NetStack stack)
{
stack.Push(value);
}
public override void Execute(NetStack stack)
{
dynamic variable = stack.Pop();
stack.Push(++variable);
}
public override void Execute(NetStack stack)
{
var offset = stack.Pop<long>();
var value = stack.Peek(offset);
stack.Push(value);
}
public override void Execute(NetStack stack)
{
stack.Push(new Parser().Parse(stack.Pop<string>()));
}
public NetStack Evaluate(string input)
{
var stack = new NetStack();
return Evaluate(stack, input);
}
public override void Execute(NetStack stack)
{
stack.Push(stack.Pop<long>() - 1);
}
public override void Execute(NetStack stack)
{
var statement = stack.Pop() as Statement;
statement.Evaluate(stack);
}
public override void Execute(NetStack stack)
{
stack.Reset();
}
public override void Execute(NetStack stack)
{
stack.Push(this);
}
public override void Execute(NetStack stack)
{
var label = stack.Pop<FunctionLabel>();
var body = stack.Pop<Statement>();
stack.BindFunction(body, label.Label);
}
