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;;; eval.rkt -- evaluation
;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz
;; This program is free software; you can redistribute it and/or
;; modify it under the terms of the Modified BSD License. You should
;; have received a copy of the license along with this program. If
;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
;; Start date: Sun Apr 26, 2009 00:44
#lang racket
(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 current-marks (make-parameter (current-continuation-marks)))
(define (get-real-context e)
(let ([ec (continuation-mark-set->context (exn-continuation-marks e))]
[cc (continuation-mark-set->context (current-marks))])
(filter-not (lambda (c) (member c cc)) ec)))
(define (display-exn-context c)
(define (maybe-display p x) (when x (display p) (display x)) x)
(when (and (pair? c) (cdr c))
(let ([sloc (cdr c)])
(and (maybe-display "" (srcloc-source sloc))
(maybe-display ":" (srcloc-line sloc))
(maybe-display ":" (srcloc-column sloc)))
(maybe-display ": " (car c))
(newline))))
(define (set-last-error e)
(set! last-result `((error (key . ,(exn-key e)))))
(display (exn-message e))
(newline) (newline)
(for-each display-exn-context (get-real-context 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 (call-with-result thunk)
(set-last-result (void))
(let ([output
(with-output-to-string
(lambda ()
(parameterize ([current-marks (current-continuation-marks)])
(with-handlers ([exn? set-last-error])
(call-with-values thunk set-last-result)))))])
(append last-result `((output . ,output)))))
(define (eval-in form spec lang)
(call-with-result
(lambda ()
(update-signature-cache spec form)
(eval form (module-spec->namespace spec lang)))))
(define compile-in eval-in)
(define (load-file file)
(call-with-result
(lambda ()
(load-module file (current-output-port) (last-namespace))
(update-signature-cache file))))
(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 "racket@~a" (namespace->module-name ns))
(builtin-reader)))
;;; eval.rkt ends here
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