I want to send values to the repl from the Lisp image.
(swank::eval-in-emacs '(slime-repl-send-string "(+ 1 1)"))
Firstly, is there a simpler way to approach this?
Secondly, the problem is that SLIME-DISPATCH-EVENT for an :EMACS-REX event returns the result of (SLIME-RECOMPUTE-MODELINES T), being:
[nil 0 0 100000 nil slime-update-all-modelines nil idle]
EVAL-IN-EMACS tries to read this and fails horribly throwing up the following error:
error while parsing arguments to DESTRUCTURING-BIND: invalid number of elements in (SWANK-IO-PACKAGE::[NIL 0 0 100000 NIL SWANK-IO-PACKAGE::SLIME-UPDATE-ALL-MODELINES NIL SWANK-IO-PACKAGE::IDLE]) to satisfy lambda list (SWANK::VALUE): exactly 1 expected, but 8 found [Condition of type SB-KERNEL::ARG-COUNT-ERROR]
As far as I can see, the solution is to have SLIME-REPL-SEND-STRING return T since there doesn't seem to be anything relying on this current behaviour.
I've attached a patch in the case that this is indeed a sane solution.