[slime-devel] indentation customization in .emacs file in Lispbox 0.7 overriding a SLIME setting?

[Taylor R. Campbell]

The SLIME REPL must have some way of knowing that the input is
finished.  Simply inserting a newline does not inform it of this;
instead, as Seibel suggested, there is a command `slime-repl-return'
that does send the input if it is finished, and which RET is usually
bound to in the REPL.  `slime-repl-return' also, incidentally, if the
input is incomplete, automatically indents, so you don't need to do
anything special to get that behaviour.

The way you're setting up key bindings is a little weird.  Locally set
key bindings will shadow any others, I believe, and since the SLIME
REPL uses a mode that runs lisp-mode-hook you're defining a key
binding that will always shadow `slime-repl-return'.

A better way to do this is to make the key bindings in the key maps
used by the various modes.  I think the C++ mode uses `c++-mode-map',
and all Lisp modes use `lisp-mode-shared-map'.  This code will set up
these key maps with the binding you want, without shadowing any
bindings that the SLIME REPL wants:

  (define-key lisp-mode-shared-map (kbd "RET") 'newline-and-indent)

  (eval-after-load 'cpp     ; This will wait until the C++ mode is
                            ; loaded, and `c++-mode-map' defined,
                            ; before running the code.
    '(define-key c++-mode-map (kbd "RET") 'newline-and-indent))