/usr/share/acl2-6.3/books/tools/fake-event.lisp is in acl2-books-source 6.3-5.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 | ; fake-event.lisp
; Copyright (C) 2011 Centaur Technology
;
; Contact:
; Centaur Technology Formal Verification Group
; 7600-C N. Capital of Texas Highway, Suite 300, Austin, TX 78731, USA.
; http://www.centtech.com/
;
; This program 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 2 of the License, or (at your option) any later
; version. This program 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, write to the Free Software
; Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA.
;
; Original author: Sol Swords <sswords@centtech.com>
(in-package "ACL2")
;; See documentation under (defmacro fake-event ...)
(defun fake-event-fn (event hard-error-ok state)
(declare (xargs :mode :program :stobjs state))
(mv-let (erp val state)
(ld `((with-output
:off :all :stack :push
(make-event
(mv-let (err-val return-val state)
(with-output :stack :pop ,event)
(er-progn
(assign fake-event-error-val err-val)
(assign fake-event-return-value return-val)
(assign fake-event-saved-world (w state))
(value '(value-triple nil)))))))
:ld-prompt nil
:ld-verbose nil
:ld-error-action :error
:ld-post-eval-print nil
:ld-pre-eval-print nil)
(declare (ignore val))
(if erp
(if hard-error-ok
(mv :fake-event-ld-error nil state)
(value (er hard 'fake-event-fn "LD returned error: ~x0~%" erp)))
(mv (@ fake-event-error-val)
(@ fake-event-return-value)
state))))
(defmacro fake-event (event &key hard-error-ok)
":doc-section Programming
Execute an event form without affecting the world.~/
Usage:
~bv[]
(fake-event <form>)
~ev[]
where ~c[<form>] evaluates to an event form. This causes that event form to be
run, but without affecting the logical world. Fake-event returns the same
error-triple that the event form produced. The logical world resulting from
that event's success or failure is saved in the state global
fake-event-saved-world.~/
Fake-event is a bit like make-event, in that both are macros that evaluate a
form to obtain an event, then run that event. Actually, fake-event doesn't
evaluate the form itself (it macroexpands to a call in which the form is not
quoted, so that it is evaluated before fake-event-fn operates upon it.) It
then calls the resulting event using a make-event inside an LD.
Unlike make-event, fake-event can only take a form that evaluates to a single
value, not an error triple. But fake-event-er is a simple wrapper for
fake-event that supports an error-triple-valued form.
If the event produces a hard error, then fake-event will also produce a hard
error unless the keyword argument :hard-error-ok t is given. If :hard-error-ok
is set, fake-event returns ~c[(mv :fake-event-ld-error nil state)]."
`(fake-event-fn ,event ,hard-error-ok state))
(defmacro fake-event-er (event &key hard-error-ok)
`(er-let*
((event ,event))
(fake-event event :hard-error-ok ,hard-error-ok)))
(local
(progn
(defun test-fake-event (n state)
(declare (xargs :mode :program :stobjs state))
(if (zp n)
(mv 0 state)
(mv-let (rand state) (random$ 10 state)
(mv-let (erp val state)
(fake-event `(with-output
:off :all
(make-event
'(defthm foo (member ,rand '(0 1 5 7))
:rule-classes nil))))
(declare (ignore val))
(mv-let (rest state)
(test-fake-event (1- n) state)
(mv (+ rest (if erp 0 1)) state))))))
(make-event (mv-let (n state) (test-fake-event 20 state)
(if (> n 10)
(value '(value-triple :more))
(value '(value-triple :less)))))))
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