public static LithpPrimitive DictPresent(LithpList parameters, LithpOpChain state,
LithpInterpreter interp)
{
LithpDict dict = (LithpDict)parameters[0];
LithpString key = (LithpString)parameters[1].Cast(LithpType.STRING);
return(dict.ContainsKey(key) ? LithpAtom.True : LithpAtom.False);
}
public bool IsDefined(string name)
{
return(closure.ContainsKey(name));
}