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;; evaluation.scm -- evaluation, compilation and macro-expansion
;; Copyright (C) 2009 Jose Antonio Ortega Ruiz
;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
;; Start date: Mon Mar 02, 2009 02:46
;; 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:
;; Core evaluation engine.
;;; Code:
(define-module (geiser evaluation)
#:export (ge:eval
ge:compile
ge:macroexpand
ge:compile-file
ge:load-file)
#:use-module (srfi srfi-1)
#:use-module (system base compile)
#:use-module (system base pmatch)
#:use-module (system vm program)
#:use-module (ice-9 pretty-print))
(define (handle-error stack . args)
(pmatch args
((,key ,subr ,msg ,args . ,rest)
(display "Backtrace:\n")
(if (stack? stack)
(display-backtrace stack (current-output-port)))
(newline)
(display-error stack (current-output-port) subr msg args rest))
(else (display (format "ERROR: ~a, args: ~a" (car args) (cdr args)))))
`(error (key . ,(car args))))
(define (evaluate form module-name evaluator)
(let ((module (or (and (list? module-name)
(resolve-module module-name))
(current-module)))
(evaluator (lambda (f m)
(call-with-values (lambda () (evaluator f m)) list)))
(result #f)
(captured-stack #f)
(error #f))
(let ((output
(with-output-to-string
(lambda ()
(set! result
(catch #t
(lambda ()
(start-stack 'geiser-eval (evaluator form module)))
(lambda args
(set! error #t)
(apply handle-error captured-stack args))
(lambda args
(set! captured-stack (make-stack #t 2 15)))))))))
(write `(,(if error result (cons 'result result))
(output . ,output)))
(newline))))
(define (eval-compile form module)
(save-module-excursion
(lambda ()
(set-current-module module)
(compile form))))
(define ge:eval ge:compile)
(define (ge:compile form module-name)
(evaluate form module-name eval-compile))
(define (ge:compile-file path)
"Compile a file, given its full @var{path}."
(ge:compile `(compile-and-load ,path) '(geiser evaluation)))
(define (ge:load-file path)
"Load file, given its full @var{path}."
(ge:compile `(load-compiled ,(compiled-file-name path)) '(geiser evaluation)))
(define (ge:macroexpand form . all)
(let ((all (and (not (null? all)) (car all))))
(with-output-to-string
(lambda ()
(pretty-print ((if all macroexpand macroexpand-1) form))))))
;;; evaluation.scm ends here
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