Re: [Jed-users-l] slang function debugging?

["John E. Davis" <davis@xxxxxxxxxxxxx>]

Ulli Horlacher <framstag@xxxxxxxxxxxxxxxxxxxx> wrote:
> How can one debug an error in a slang function?
>
> I have substituted make_backup_filename() (from site.sl) with my own
> version:
>
> define make_backup_filename(dir,file) {
>   variable f = dir + "/" + file;
>   f = str_quote_string(f,"\"'`[](){}<>|;&$*? \t",'\\');
>   system(sprintf("vv -s %s >/dev/null",f));

The system function returns a value that your are not handling.  You
can change the above to:

    () = system(sprintf("vv -s %s >/dev/null",f));

You might try using the process module to avoid escaping the filename:

   require ("process");
   define make_backup_filename (dir, file)
   {
      variable f = path_concat (dir, file);
      () = new_process(["vv", "-s", f]; stdout="/dev/null").wait();
      return "";
   }

> It works well when I edit just one file, but when I edit more files and
> change their buffers, I get on exit :
>
> Unable to typecast Integer_Type to String_Type

You can add _traceback=1; to your .jedrc file.  Then when an error
occurs, switch to the *traceback* buffer and look at the traceback
information.

I hope this helps.
--John
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