84 lines
2.4 KiB
Racket
84 lines
2.4 KiB
Racket
;;; eval.rkt -- evaluation
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;; Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014 Jose Antonio Ortega Ruiz
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;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the Modified BSD License. You should
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;; have received a copy of the license along with this program. If
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;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
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;; Start date: Sun Apr 26, 2009 00:44
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#lang racket
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(provide eval-in
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load-file
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macroexpand
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add-to-load-path
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make-repl-reader
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call-with-result)
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(require geiser/enter geiser/modules geiser/images)
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(require errortrace/errortrace-lib)
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(define last-result (void))
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(define last-namespace (make-parameter (current-namespace)))
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(define (exn-key e)
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(vector-ref (struct->vector e) 0))
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(define (set-last-error e)
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(set! last-result `((error (key . ,(exn-key e)))))
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(display (exn-message e))
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(newline) (newline)
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(parameterize ([error-context-display-depth 10])
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(print-error-trace (current-output-port) e)))
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(define (write-value v)
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(with-output-to-string
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(lambda () (maybe-write-image v))))
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(define (set-last-result . vs)
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(set! last-result `((result ,@(map write-value vs)))))
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(define (call-with-result thunk)
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(set-last-result (void))
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(let ([output
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(with-output-to-string
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(lambda ()
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(parameterize ([current-error-port (current-output-port)])
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(with-handlers ([exn? set-last-error])
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(call-with-values thunk set-last-result)))))])
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(append last-result `(,(cons 'output output)))))
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(define (eval-in form spec lang . non-top)
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(write (call-with-result
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(lambda ()
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(eval (if (null? non-top) (cons '#%top-interaction form) form)
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(module-spec->namespace spec lang)))))
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(newline))
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(define (load-file file)
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(load-module file (current-output-port) (last-namespace)))
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(define (macroexpand form . all)
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(let ([all (and (not (null? all)) (car all))])
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(with-output-to-string
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(lambda ()
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(pretty-print (syntax->datum ((if all expand expand-once) form)))))))
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(define (add-to-load-path p)
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(when (string? p)
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(let ([p (string->path p)]
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[cps (current-library-collection-paths)])
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(unless (member p cps)
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(current-library-collection-paths
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(cons p cps)))))
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#t)
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(define (make-repl-reader reader)
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(lambda ()
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(last-namespace (current-namespace))
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(reader)))
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