PLT support: basic startup and evaluation working.

1 files changed, 86 insertions, 0 deletions

diff --git a/scheme/plt/geiser.ss b/scheme/plt/geiser.ss
new file mode 100644
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+++ b/scheme/plt/geiser.ss
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+;; geiser.ss -- top level entry point
+
+;; Copyright (C) 2009 Jose Antonio Ortega Ruiz
+
+;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
+;; Start date: Sat Apr 25, 2009 22:36
+
+;; 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:
+
+;; Top level REPL definitions for Geiser.
+
+;;; Code:
+
+(module geiser scheme
+  (provide geiser/eval
+           geiser/compile
+           geiser/autodoc
+           geiser/format-error
+           geiser/set-result!
+           geiser/make-repl-reader)
+
+  (compile-enforce-module-constants #f)
+  (require scheme/enter scheme/string scheme/port)
+
+  (define (ensure-module spec)
+    (cond ((symbol? spec) spec)
+          ((not (string? spec)) #f)
+          ((not (file-exists? spec)) #f)
+          ((absolute-path? spec) `(file ,spec))
+          (else spec)))
+
+  (define (exn-key e)
+    (vector-ref (struct->vector e) 0))
+
+  (define last-result (void))
+
+  (define (geiser/format-error e)
+    (set! last-result `((error (key . ,(exn-key e))
+                               (subr)
+                               (msg . ,(exn-message e))))))
+  (define (geiser/set-result! v)
+    (set! last-result `((result  ,v))))
+
+  (define nowhere (open-output-nowhere))
+
+  (define (geiser/eval form spec)
+    (geiser/set-result! (void))
+    (parameterize ((current-error-port nowhere))
+      (eval #`(enter! #,(ensure-module spec))))
+    (with-handlers ((exn? (dynamic-require ''geiser 'geiser/format-error)))
+      ((dynamic-require ''geiser 'geiser/set-result!) (eval form)))
+    (enter! #f)
+    last-result)
+
+  (define geiser/compile geiser/eval)
+  (define (geiser/autodoc . x) #f)
+
+  (define prompt (make-parameter "mzscheme@(geiser)"))
+  (define (geiser/make-repl-reader builtin-reader)
+    (lambda ()
+      (display (prompt))
+      (builtin-reader))))
+
+(require 'geiser)
+
+(current-prompt-read
+ (let ([old (current-prompt-read)])
+   (lambda ()
+     (current-prompt-read
+      ((dynamic-require ''geiser 'geiser/make-repl-reader) old)))))
+
+
+;;; geiser.ss ends here