public override ReaderMacroStep NextStep()
{
Cons head = null;
object tail = null;
Readtable currentReadtable = CL.Readtable;
while (true)
{
int xx;
char x;
// Discard whitespace
do
{
xx = this.context.InputStream.Peek();
if (xx == -1)
{
throw new NotImplementedException();
}
else
{
x = (char)xx;
}
}while (currentReadtable.IsWhitespaceSyntax(x) && (this.context.InputStream.Read() != -1));
if (x == ')')
{
this.context.InputStream.Read(); // discard the close paren
return((CL.ReadSuppress == true)
? new FinalReaderMacroStep()
: new FinalReaderMacroStep(CL.Reconc(head, tail)));
}
//else if (x == '.') {
// throw new NotImplementedException ();
//}
else
{
object next = CL.Read(this.context.InputStream, true, null, true); // recursive read
if (CL.ReadSuppress != true)
{
head = CL.Cons(next, head);
}
}
}
}