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;;; eval.rkt -- evaluation
;; Copyright (C) 2009, 2010, 2011, 2012 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
load-file
macroexpand
add-to-load-path
make-repl-reader)
(require geiser/enter geiser/modules geiser/images)
(require errortrace/errortrace-lib)
(define last-result (void))
(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))
(newline) (newline)
(parameterize ([error-context-display-depth 10])
(print-error-trace (current-output-port) e)))
(define (write-value v)
(with-output-to-string
(lambda () (maybe-write-image 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-error-port (current-output-port)])
(with-handlers ([exn? set-last-error])
(call-with-values thunk set-last-result)))))])
(append last-result `((output . ,output)))))
(define (eval-in form spec lang)
(write (call-with-result
(lambda ()
(eval form (module-spec->namespace spec lang)))))
(newline))
(define (load-file file)
(load-module file (current-output-port) (last-namespace)))
(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 (add-to-load-path p)
(when (string? p)
(let ([p (string->path p)]
[cps (current-library-collection-paths)])
(unless (member p cps)
(current-library-collection-paths
(cons p cps)))))
#t)
(define (make-repl-reader reader)
(lambda ()
(last-namespace (current-namespace))
(reader)))
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