Elisp-side larceny.

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+;; geiser-larceny.el -- larceny's implementation of the geiser protocols
+
+;; Copyright (C) 2009 Jose Antonio Ortega Ruiz
+
+;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
+;; Start date: Sun Mar 15, 2009 03:08
+
+;; This file is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3 of the License, or
+;; (at your option) any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Comentary:
+
+;; Implementation of all required Elisp Geiser protocols for Larceny.
+
+;;; Code:
+
+(require 'geiser-impl)
+(require 'geiser-syntax)
+(require 'geiser-custom)
+(require 'geiser-base)
+
+
+;;; Customization:
+
+(defgroup geiser-larceny nil
+  "Customization for Geiser's Larceny flavour."
+  :group 'geiser)
+
+(defcustom geiser-larceny-binary
+  (cond ((eq system-type 'windows-nt) "larceny.exe")
+        ((eq system-type 'darwin) "larceny")
+        (t "larceny"))
+  "Name to use to call the Larceny executable when starting a REPL."
+  :type 'string
+  :group 'geiser-larceny)
+
+
+;;; REPL support:
+
+(defun geiser-larceny-parameters ()
+  "Return a list with all parameters needed to start Larceny."
+  `("-err5rs" "-path" ,(expand-file-name "larceny/" geiser-scheme-dir)))
+
+(defconst geiser-larceny-prompt-regexp "^\\(debug\\)?> ")
+
+(defun switch-to-larceny (&optional ask)
+  (interactive "P")
+  (switch-to-geiser ask 'larceny))
+
+(defun run-larceny ()
+  "Run Geiser using Larceny."
+  (interactive)
+  (run-geiser 'larceny))
+
+
+;;; Evaluation support:
+
+(defun geiser-larceny-geiser-procedure (proc)
+  "Translate a bare procedure symbol to one executable in Larceny's
+context. Return NULL for unsupported ones; at the very least,
+EVAL, COMPILE, LOAD-FILE and COMPILE-FILE should be supported."
+  (intern (format "ge:%s" proc)))
+
+(defconst geiser-larceny--module-re
+  "(library +\\(([^)]+)\\)")
+
+(defun geiser-larceny-get-module (&optional module)
+  "Return a scheme datum representing the current module.
+If MODULE is provided, transform it to such a datum."
+  (cond ((null module)
+         (save-excursion
+           (goto-char (point-min))
+           (if (re-search-forward geiser-larceny--module-re nil t)
+               (geiser-larceny-get-module (match-string-no-properties 1))
+             :f)))
+        ((listp module) module)
+        ((stringp module) (or (ignore-errors (car (read-from-string module))) :f))
+        (t :f)))
+
+
+;;; Trying to ascertain whether a buffer is Larceny Scheme:
+
+(defun geiser-larceny-guess ()
+  "Return `t' if the current buffer looks like a Larceny file."
+  (and (geiser-larceny-get-module) t))
+
+
+;;; Register this implementation:
+
+(geiser-impl--register 'larceny)
+
+
+
+(provide 'geiser-larceny)
+;;; geiser-larceny.el ends here