\chapter*{Possible Future Changes}

The following list represents a few of the ideas that occurred to me as I
was developing these interpreters for how things might be done differently.
These are presented in no particular order.  (Nor as any particularly grave
criticism of the Kamin interpreters - I still think the book as a whole is
very good).
\begin{itemize}
\item
The C++ versions of the interpreters have an annoying habit of dumping 
core when an error occurs.  Need to track this down and fix it.
\item
I would remove the while statement from the chapter 2 lisp interpreter.
Students who do not have previous experience with Lisp often have a
difficult time learning to program in a recursive fashion.  For them the
while statement is a crutch, and without it they would be forced to use the
more Lisp-like features of the language.
\item
I would add functionals (called operators in APL) to chapter 3.
Specifically I would make reduction take the function as an argument, and
add inner and outer product.  This would allow an easier transition to
functional programming in the next section.
\item
I might be tempted to add a chapter before chapter 3 on Setl.  This is
another example of a language using large values, and allows a new and
different problem domain to be discussed (namely logic).
\item
It would be nice to add call/cc to the scheme interpreter, but I don't exactly 
see how to do this right now.  
This is not quite as critical now that the Prolog interpreter uses
continuations for its execution.
\item
I would remove the keyword ``rep'' from the CLU syntax, as it is
unnecessary and its elimination simplifies the implementation.
\end{itemize}