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;; eval.ss -- evaluation
;; Copyright (C) 2009 Jose Antonio Ortega Ruiz
;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
;; Start date: Sun Apr 26, 2009 00:44
;; 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:
;; Evaluation functions
;;; Code:
#lang scheme
(provide eval-in
compile-in
load-file
compile-file
macroexpand
make-repl-reader)
(require scheme/enter geiser/modules geiser/autodoc)
(define last-result (void))
(define namespace->module-name
(compose module-path-name->name namespace->module-path-name))
(define last-namespace (make-parameter (current-namespace)))
(define (exn-key e)
(vector-ref (struct->vector e) 0))
(define (set-last-error e)
(set! last-result `((error (key . ,(exn-key e)))))
(display (exn-message e)))
(define (write-value v)
(with-output-to-string
(lambda () (write v))))
(define (set-last-result . vs)
(set! last-result `((result ,@(map write-value vs)))))
(define (eval-in form spec)
(set-last-result (void))
(let ((output
(with-output-to-string
(lambda ()
(with-handlers ((exn? set-last-error))
(update-module-cache spec form)
(call-with-values
(lambda () (eval form (module-spec->namespace spec)))
set-last-result))))))
(append last-result `((output . ,output)))))
(define compile-in eval-in)
(define (load-file file)
(let ((current-path (namespace->module-path-name (last-namespace)))
(result (eval-in `(load-module ,file (current-output-port))
'geiser/eval)))
(update-module-cache file)
(load-module (and (path? current-path) (path->string current-path)))
result))
(define compile-file load-file)
(define (macroexpand form . all)
(let ((all (and (not (null? all)) (car all))))
(with-output-to-string
(lambda ()
(pretty-print (syntax->datum ((if all expand expand-once) form)))))))
(define (make-repl-reader builtin-reader)
(lambda (ns)
(last-namespace ns)
(printf "mzscheme@~a" (namespace->module-name ns))
(builtin-reader)))
;;; eval.ss ends here
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