Result EvalFunc(Evaluator evaluater, Result[] argArray)
{
if (argArray.Length < 2)
{
throw new ArgumentException();
}
if (argArray[0] == null || argArray[1] == null)
{
throw new ArgumentNullException("argArray[0]");
}
object target = argArray[0].Value;
if (target == null)
{
throw new ArgumentException();
}
string functionName = ConvertHelper.ToString(argArray[1].Value);
Type type = null;
BindingFlags bindingFlags = BindingFlags.Default;
if (target is Type)
{
type = (Type)target;
target = null;
bindingFlags = BindingFlags.Static;
}
else
{
type = target.GetType();
bindingFlags = BindingFlags.Instance;
}
bindingFlags |= BindingFlags.InvokeMethod | BindingFlags.Public | BindingFlags.OptionalParamBinding;
int length = argArray.Length - 2;
object[] argValueAry = new object[length];
for (int i = 0; i < length; i++)
{
argValueAry[i] = argArray[i + 2].Value;
}
Binder defaultBinder = Type.DefaultBinder;
object ret = type.InvokeMember(functionName,
bindingFlags, defaultBinder, target, argValueAry);
if (ret != null)
{
return(new Result(ret.GetType(), ret));
}
return(new Result(null, null));
}
protected override Result DoEval(Evaluator evaluater, Result[] argArray)
{
Type type0 = argArray[0].Type;
Type type1 = argArray[1].Type;
if (type0 == null && type1 == null)
{
return(new Result(null, null));
}
else
{
if (type0 == typeof(string))
{
return(new Result(ConvertHelper.ToString(argArray[0].Value) + ConvertHelper.ToString(argArray[1].Value)));
}
else
{
double ret = System.Convert.ToDouble(argArray[0].Value) + System.Convert.ToDouble(argArray[1].Value);
return(new Result(type0, ConvertHelper.ChangeType(ret, type0)));
}
}
}
