Tobias C. Rittweiler wrote: 
Helmut Eller <heller@common-lisp.net> writes:

  
I've added this to SLIME, with the name slime-cycle-connections.  No
key-binding, though.
    

What is the reason that this function tries to make the new connection
buffer-local?
That is not what this function are doing. it is not to make a new connection buffer-local.
You make the current-connection variable, buffer-local. That could be an old, still running, lisp connection, and an old lisp-buffer.
If you have multiple lisp images running, with different source for the different images. Then having to switch current-connection when jumping between buffers, saves a lot of frustration.

Example:
I have one lisp running the web-server, using a different lisp with business logic. Then if I change something in the interface between the two lisps, I would change something the business-logic-image (C-x C-c in the source-file for the business-logic-image). Then I would have to change something in the web-server-image. This is where I save time, as I have already set current-connection buffer-local to the web-server-image. So I just press C-x C-c in the source-file for the web-server-image. Then maybe I want to improve it, so I jump back and fourth several times. 

I just committed not to do that when we're inside a REPL buffer; but it
doesn't make much sense for .lisp buffers either, or SLDB buffers, or
the inspector, or..
Right, it does not make sense for REPL, SLDB or inspector. But as you can see from the example above: It makes a lot of sense for .lisp files, and I use it every day.

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