On Dec 11, 2009, at 5:08 AM, Laurent PETIT wrote: > But then, we could even go one level deeper: not only provide a particular > instance that would allow to quit the REPL, but a set of instances. And if > the returned value of the call to the REPL returns one of the instances in > the set, then quit. > This would allow to nest debug-repls (but is it interesting ?) calls, and to > go back to the encapsulating repl by e.g. a call to debug-repl/quit(1), or to > go up 2 levels in the debug-repls nesting by calling debug-repl/quit(2), ... > or to go back to the main environment by e.g. a call to debug-repl/quit().
One possible implementation of this is to use keywords as commands to the
debug-repl. Since evaluating a keyword (alone on a line by itself) is seldom
interesting, we could use ones like :quit or :pop as commands intercepted by
the debug repl before evaluation. We could even respond to a set of commands
and send any unrecognized commands along to the evaluator.
If hijacking namespace-less keywords for that purpose is distasteful, we could
also put the commands in a namespace, for example:
:dr/quit
--Steve
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