Ctrl-C in printer exits Ikarus

[Michael D. Adams]

While in the Eval stage of the REPL, Ctrl-C stops evaluation and returns you to the Ikarus prompt. On the other hand, while in the Read or Print stages of the REPL, Ctrl-C exits Ikarus.

Instead Ctrl-C while in the Print stage should simply return to the Ikarus prompt (Eval and Read should keep their current behavior).

As it is now:

$ ikarus
Ikarus Scheme version 0.0.3+ (revision 1692, build 2008-11-25)
Copyright (c) 2006-2008 Abdulaziz Ghuloum

> (define x (make-vector #x10FFFF))
> x
#(0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...
<User types Ctrl-C>
Unhandled exception:
 Condition components:
   1. &interrupted
   2. &message: "received an interrupt signal"
$ # <-- shell prompt

As it should be:

$ ikarus
Ikarus Scheme version 0.0.3+ (revision 1692, build 2008-11-25)
Copyright (c) 2006-2008 Abdulaziz Ghuloum

> (define x (make-vector #x10FFFF))
> x
#(0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
  0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
...
<User types Ctrl-C>
Unhandled exception
 Condition components:
   1. &interrupted
   2. &message: "received an interrupt signal"
> ;; <--- ikarus prompt

[Abdulaziz Ghuloum (aghuloum)]

I fixed it in 1696, but I don't like it. There are some tiny areas where condition handlers are switched and where ikarus would exit if interrupted. The code needs to be revisited, so, marking in-progress.

[Abdulaziz Ghuloum (aghuloum)]

On Dec 2, 2008, at 9:14 AM, Michael D. Adams wrote:

> While in the Eval stage of the REPL, Ctrl-C stops evaluation and
> returns
> you to the Ikarus prompt. On the other hand, while in the Read or
> Print
> stages of the REPL, Ctrl-C exits Ikarus.

Is Ikarus exiting in the Read stage? It shouldn't. Can you confirm
please.

Aziz,,,

[Michael D. Adams (mdmkolbe)]

Ikarus is not exiting in the Read state. I miss-spoke before.