private static MalType Times(MalList <MalType> arg)
{
var items = arg.GetItems().Select(x => (long)(MalLong)x);
long result = items.Aggregate <long, long>(1, (current, item) => current * item);
return(MalLong.Of(result));
}
private static MalType Minus(MalList <MalType> arg)
{
var items = arg.GetItems().Select(x => (long)(MalLong)x).ToList();
if (items.Count() != 2)
{
throw new WrongNumberOfArgumentsException("wrong number of arguments for minus", null);
}
return(MalLong.Of(items[0] - items[1]));
}
private static MalType IntegerDivide(MalList <MalType> arg)
{
var items = arg.GetItems().Select(x => (long)(MalLong)x).ToImmutableList();
if (items.Count() != 2)
{
throw new WrongNumberOfArgumentsException("wrong number of arguments for divide", null);
}
return(MalLong.Of(items[0] / items[1]));
}
public static MalType Eval(MalType arg, Environment environment)
{
var argList = arg as MalList <MalType>;
bool breakHere = (arg.ToString() == "(+ 7 8)");
if (argList != null)
{
if (argList.GetItems()[0].Equals(new MalSymbol("def!")))
{
return(environment.Set(argList.GetItems()[1] as MalSymbol, Eval(argList.GetItems()[2], environment)));
}
if (argList.GetItems()[0].Equals(new MalSymbol("let*")))
{
var letEnv = Environment.Make(environment);
var listLike = argList.GetItems()[1] as AbstractMalListlike <MalType>;
if (listLike != null)
{
var letParams = listLike.GetItems();
int i = 0;
do
{
var key = letParams[i] as MalSymbol;
var value = Eval(letParams[i + 1], letEnv);
letEnv.Set(key, value);
i = i + 2;
} while (i < letParams.Count);
}
return(Eval(argList.GetItems()[2], letEnv));
}
MalList <MalType> newEvaluatedList = ((MalList <MalType>)eval_ast(arg, environment));
var items = newEvaluatedList.GetItems();
var firstItem = items.First() as MalSymbol;
var restItems = new MalList <MalType>(items.GetRange(1, items.Count - 1));
var application = environment.Apply(firstItem, restItems);
Console.WriteLine("Result of apply: " + application);
return(application);
}
/*
* ast is not a list: then return the result of calling eval_ast on it.
*/
return(eval_ast(arg, environment));
}
private static MalType Plus(MalList <MalType> arg)
{
return(arg.GetItems().Aggregate(MalLong.Of(0), (current, item) => (MalLong)current + (MalLong)item));
}