public Interpreter()
{
BuiltinMethods.InitializeBuiltinMethods();
}
private RuntimeResult VisitCallNode(CallNode node, Context context, Context fromCtx = null)
{
List <(string, Values.Value)> args = new List <(string, Values.Value)>();
for (int i = 0; i < node.Arguments.Count; i++)
{
RuntimeResult result = Visit(node.Arguments[i].Item2, fromCtx == null ? context : fromCtx);
if (result.HasError)
{
return(result);
}
args.Add((node.Arguments[i].Item1, result.Value));
}
if (node.Node.Type == NodeType.VAR_ACCESS)
{
VarAccessNode accessNode = (VarAccessNode)node.Node;
string name = accessNode.Token.Value.ToString();
if (BuiltinMethods.BuiltinMethodList.ContainsKey(name))
{
return(BuiltinMethods.Execute(name, args, node.Position, context));
}
else
{
Values.Value method = context.GetSymbol(name);
if (method == null)
{
return(new RuntimeResult(new RuntimeError(node.Position, "Method '" + name + "' is not defined", context)));
}
if (method.Type == Values.ValueType.METHOD)
{
return(((Values.MethodValue)method).Execute(args, this));
}
else if (method.Type == Values.ValueType.CLASS)
{
Values.ClassValue classValue = ((Values.ClassValue)method).Clone();
//classValue.Type = Values.ValueType.OBJECT;
if (classValue.BaseClass != null)
{
RuntimeResult baseResult = classValue.InitializeBaseClass(context, this);
if (baseResult.HasError)
{
return(baseResult);
}
Context newContext = new Context(name, baseResult.Value.Context);
classValue.SetPositionAndContext(accessNode.Token.Position, newContext);
newContext.AddSymbol("this", classValue);
newContext.AddSymbol("base", baseResult.Value);
RuntimeResult runtimeResult = Visit(classValue.Body, newContext);
if (runtimeResult.HasError)
{
return(runtimeResult);
}
//Constructor
Values.Value ctorValue = newContext.GetSymbol("init");
if (ctorValue != null && ctorValue.Type == Values.ValueType.METHOD)
{
Values.MethodValue initMethod = (Values.MethodValue)ctorValue;
RuntimeResult res = initMethod.Execute(args, this);
if (res.HasError)
{
return(res);
}
}
return(new RuntimeResult(classValue));
}
else
{
Context newContext = new Context(name, context);
classValue.SetPositionAndContext(accessNode.Token.Position, newContext);
newContext.AddSymbol("this", classValue);
RuntimeResult runtimeResult = Visit(classValue.Body, newContext);
if (runtimeResult.HasError)
{
return(runtimeResult);
}
//Constructor
Values.Value ctorValue = newContext.GetSymbol("init");
if (ctorValue != null && ctorValue.Type == Values.ValueType.METHOD)
{
Values.MethodValue initMethod = (Values.MethodValue)ctorValue;
initMethod.Execute(args, this);
}
return(new RuntimeResult(classValue));
}
}
return(new RuntimeResult(new RuntimeError(node.Position, "'" + name + "' is not a method", context)));
}
}
return(new RuntimeResult(new RuntimeError(node.Position, "Can't call as a method", context)));
}
