private void Evaluator_PreEvaluateFunction(object sender, FunctionPreEvaluationEventArg e)
{
bool isSysFunc = Functions.Any(f => f.Name == e.Name);
if (!isSysFunc && !UserFuncs.Any(f => f.Name == e.Name))
{
throw new InterpreterException($"Unkown function {e.Name} at {Location}");
}
if (isSysFunc)
{
_7sFunction func = Functions.First(f => f.Name == e.Name);
object[] args = new object[0];
if (e.Args.Count > 0)
{
args = e.Args.Select(a => evaluator.Evaluate(a)).ToArray();
}
e.Value = func.Run(args);
e.FunctionReturnedValue = true;
}
else
{
UserFunction func = UserFuncs.First(f => f.Name == e.Name);
object[] args = new object[0];
if (e.Args.Count > 0)
{
args = e.Args.Select(a => evaluator.Evaluate(a)).ToArray();
}
InterpreterState state = this;
func.Run(ref state, args);
e.Value = state.ReturnValue;
e.FunctionReturnedValue = true;
}
}
private void AddUserFunctions(object sender, FunctionPreEvaluationEventArg e)
{
foreach (var kv in userFunctions)
{
if (kv.Key == e.Name)
{
if (e.Args.Count == kv.Value.NumberOfArgs())
{
e.CancelEvaluation = false;
}
else
{
WriteLineColor($"{e.Name} expects {kv.Value.NumberOfArgs()}, but you put {e.Args.Count}", Red);
e.CancelEvaluation = true;
}
e.Value = kv.Value.Run(e.EvaluateArgs());
}
}
}
