//last arg must be seq
internal Object apply(params Object[] args)
{
Object f = Primitives.arg(0, args);
IEnumerator tail = (IEnumerator)get_enum_gf.Invoke(args[args.Length - 1]);
ArrayList fargs = new ArrayList();
for (int i = 1; i < args.Length - 1; i++)
{
fargs.Add(args[i]);
}
while (tail.MoveNext())
{
fargs.Add(tail.Current);
}
return(Util.InvokeObject(f, fargs.ToArray()));
}
internal Object map_to_list(params Object[] args)
{
Object f = Primitives.arg(0, args);
IEnumerator[] enums = new IEnumerator[args.Length - 1];
for (int i = 0; i < enums.Length; i++)
{
enums[i] = (IEnumerator)get_enum_gf.Invoke(Primitives.arg(i + 1, args));
}
//n.b. setting up arg array which will be reused
//mean functions cannot assume ownership of args w/o copying them
Object[] fargs = new Object[enums.Length];
Cons ret = null;
Cons tail = null;
while (true)
{
for (int i = 0; i < enums.Length; i++)
{
if (enums[i].MoveNext())
{
fargs[i] = enums[i].Current;
}
else //bail on shortest
{
return(ret);
}
}
Object x = Util.InvokeObject(f, fargs);
Cons node = new Cons(x, null);
if (ret == null)
{
ret = tail = node;
}
else
{
tail = tail.rest = node;
}
}
}
internal Object internf(params Object[] args)
{
String sym = (String)Primitives.arg(0, args);
return(symbolTable.intern(sym));
}
internal Object loadf(params Object[] args)
{
String path = (String)Primitives.arg(0, args);
return(LoadFile(path));
}
internal Object evalf(params Object[] args)
{
Object x = Primitives.arg(0, args);
return(eval(x, globalenv));
}