Is there a way to stop a long running expression in the REPL

[Cecil Westerhof]

Sometimes I execute something that takes to long. With <Ctrl>-C I can cancel it, but this also cancels the REPL itself. Is there a way to terminate the running command without terminating the running REPL?

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Cecil Westerhof

[Lucas Bradstreet]

Which repl are you using? In lein repl, this does not happen to me, it
just terminates the expression.

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[Cecil Westerhof]

2015-02-21 13:28 GMT+01:00 Lucas Bradstreet <lucasbr...@gmail.com>:

Which repl are you using? In lein repl, this does not happen to me, it
just terminates the expression.

​I am using:
    rlwrap java -cp "${CP}" clojure.main --init "${CLOJURE_INIT}" --repl

But maybe it is time to switch. ;-)​

 

 

On 21 February 2015 at 19:45, Cecil Westerhof <cldwes...@gmail.com> wrote:
> Sometimes I execute something that takes to long. With <Ctrl>-C I can cancel
> it, but this also cancels the REPL itself. Is there a way to terminate the
> running command without terminating the running REPL?

 

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Cecil Westerhof

[Fluid Dynamics]

It depends on what REPL/IDE you are using. In Counterclockwise there's an icon on the REPL pane's upper right with a red box near a gear, third from the left, which interrupts the currently running expression. Some other REPL environments provide similar functionality, as other people have noted in this thread, while others unfortunately don't provide a way short of restarting the REPL (and losing anything you've def'd or defn'd at the REPL in the process -- it's a good idea to keep a scratch file in Notepad or somewhere and paste things there that don't belong in your source code but which are convenient to run from time to time in the REPL, such as ad hoc tests or convenience functions and defs for during development).

[Lee Spector]

In case anybody is developing tools for this kind of thing, one of the things I most miss from Common Lisp is the ability to interrupt a running expression AND see the values of locals at the point of interruption. Fantastically useful for debugging. As far as I know there's no environment that lets you do this for Clojure. Seeing locals at the context of an exception (for each stack frame) is also fantastically useful and at the top of my wish list for the ecosystem... and while I've heard tell that there's a way to do this (Ritz?) if you run within emacs, I've never actually seen this in action and would love it if there was a more broadly accessible way to do this.

-Lee

[Shawn Rasheed]

If it's the clojure repl this might work: https://clojuredocs.org/clojure.repl/set-break-handler!

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---sr

[Shawn Rasheed]

Using Lein 2's REPL, Ctrl-C doesn't cancel the REPL itself.

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---sr

[Erik Price]

Vim Fireplace supports Ctrl-c without killing its REPL host. Highly recommended if you are a Vim user.

e

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