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|
;;;-*-Mode:LISP; Package: CHAOS; Base:10; Syntax:Common-lisp -*-
;;;
;;; Copyright (c) 2000-2015, Toshimi Sawada. All rights reserved.
;;;
;;; Redistribution and use in source and binary forms, with or without
;;; modification, are permitted provided that the following conditions
;;; are met:
;;;
;;; * Redistributions of source code must retain the above copyright
;;; notice, this list of conditions and the following disclaimer.
;;;
;;; * Redistributions in binary form must reproduce the above
;;; copyright notice, this list of conditions and the following
;;; disclaimer in the documentation and/or other materials
;;; provided with the distribution.
;;;
;;; THIS SOFTWARE IS PROVIDED BY THE AUTHOR 'AS IS' AND ANY EXPRESSED
;;; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
;;; WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
;;; ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
;;; DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
;;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
;;; GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
;;; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
;;; WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
;;; NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
;;; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;;
;;;
(in-package :chaos)
#|=============================================================================
System:Chaos
Module:BigPink
File:syntax.lisp
=============================================================================|#
#-:chaos-debug
(declaim (optimize (speed 3) (safety 0) #-GCL (debug 0)))
#+:chaos-debug
(declaim (optimize (speed 1) (safety 3) #-GCL (debug 3)))
;;;
;;; INSTALL-FOPL-SENTENCE
;;;
(defun install-fopl-sentence (mod-name
&key (sentence-sort "FoplSentence")
(vardecl-sort "VarDeclList")
(var-decl-list '("_" "," "_"))
(forall '("\\A" "[" "_" "]" "_"))
(exists '("\\E" "[" "_" "]" "_"))
(and '("_" "&" "_"))
(or '("_" "|" "_"))
(imply '("_" "->" "_"))
(iff '("_" "<->" "_"))
(not '("~" "_"))
(eq nil)
(beq nil))
(let ((fopl-sentence-module (eval-modexp mod-name)))
(cond ((and fopl-sentence-module (not (modexp-is-error fopl-sentence-module)))
(setq *fopl-sentence-module* fopl-sentence-module)
(setf (module-type *fopl-sentence-module*) :system)
;; setup sorts
(let ((fopl-sentence-sort
(find-sort-in fopl-sentence-module sentence-sort))
(var-decl-list-sort
(find-sort-in fopl-sentence-module vardecl-sort)))
(if fopl-sentence-sort
(setq *fopl-sentence-sort* fopl-sentence-sort)
(with-output-panic-message ()
(princ "could not find sort FoplSentence")))
(if var-decl-list-sort
(setq *var-decl-list-sort* var-decl-list-sort)
(with-output-panic-message ()
(princ "could not find sort VarDeclList")))
)
;; set up operators
(let ((var-decl-list (find-method-in fopl-sentence-module
var-decl-list
(list *cosmos*
*cosmos*)
*var-decl-list-sort*))
(fopl-forall (find-method-in fopl-sentence-module
forall
(list *cosmos*
*fopl-sentence-sort*)
*fopl-sentence-sort*))
(fopl-exists (find-method-in fopl-sentence-module
exists
(list *cosmos*
*fopl-sentence-sort*)
*fopl-sentence-sort*))
(fopl-and (find-method-in fopl-sentence-module
and
(list *fopl-sentence-sort*
*fopl-sentence-sort*)
*fopl-sentence-sort*))
(fopl-or (find-method-in fopl-sentence-module
or
(list *fopl-sentence-sort*
*fopl-sentence-sort*)
*fopl-sentence-sort*))
(fopl-imply (find-method-in fopl-sentence-module
imply
(list *fopl-sentence-sort*
*fopl-sentence-sort*)
*fopl-sentence-sort*))
(fopl-iff (find-method-in fopl-sentence-module
iff
(list *fopl-sentence-sort*
*fopl-sentence-sort*)
*fopl-sentence-sort*))
(fopl-neg (find-method-in fopl-sentence-module
not
(list *fopl-sentence-sort*)
*fopl-sentence-sort*))
(fopl-eq (if eq
(find-method-in fopl-sentence-module
eq
(list *cosmos*
*cosmos*)
*fopl-sentence-sort*)
:none))
(fopl-beq (if beq
(find-method-in fopl-sentence-module
beq
(list *cosmos*
*cosmos*)
*fopl-sentence-sort*)
:none))
)
;;
(if (eq fopl-beq :none)
(setq *fopl-two-equalities* nil)
(setq *fopl-two-equalities* t))
;;
(if (and var-decl-list fopl-forall fopl-exists fopl-and fopl-or
fopl-imply fopl-iff fopl-neg fopl-eq fopl-beq)
(setq *var-decl-list* var-decl-list
*fopl-forall* fopl-forall
*fopl-exists* fopl-exists
*fopl-and* fopl-and
*fopl-or* fopl-or
*fopl-imply* fopl-imply
*fopl-iff* fopl-iff
*fopl-neg* fopl-neg
*fopl-eq* (if (not (eq fopl-eq :none))
fopl-eq
nil)
*fopl-beq* (if (not (eq fopl-beq :none))
fopl-beq
nil))
(with-output-panic-message ()
(princ "could not install some operators in FoplSentence"))))
)
(t (with-output-panic-message ()
(princ "could not find FoplSentece module")))
)))
(defun install-fopl-clause ()
(let ((fopl-clause-module (eval-modexp "FOPL-CLAUSE")))
(let ((answer-method (find-method-in fopl-clause-module
'("$Ans")
(list *cosmos*)
*bool-sort*)))
(unless answer-method
(with-output-panic-message ()
(princ "could not install $Ans.")))
(setq *fopl-ans* answer-method))))
;;; NOT USED
(defun install-fopl-clause-form ()
(let ((fopl-clause-form-module (eval-modexp "FOPL-CLAUSE-FORM")))
(cond ((and fopl-clause-form-module
(not (modexp-is-error fopl-clause-form-module)))
(setq *fopl-clause-form-module* fopl-clause-form-module)
;; setup sorts
(let ((fopl-clause-sort (find-sort-in fopl-clause-form-module
"FoplClause"))
(fopl-sentence-seq-sort (find-sort-in fopl-clause-form-module
"FoplSentenceSeq")))
(if (and fopl-clause-sort fopl-sentence-seq-sort)
(setq *fopl-clause-sort* fopl-clause-sort
*fopl-sentence-seq-sort* fopl-sentence-seq-sort)
(with-output-panic-message ()
(princ "could not install some sorts of FOPL-CLAUSE-FORM"))))
;; setup operators
(let ((clause-constructor (find-method-in fopl-clause-form-module
'("[" "_" "]")
(list *fopl-sentence-seq-sort*)
*fopl-clause-sort*))
(clause-constructor2 (find-method-in
fopl-clause-form-module
'("!" "[" "_" "]")
(list *fopl-sentence-seq-sort*)
*fopl-clause-sort*))
(fopl-sentence-seq (find-method-in
fopl-clause-form-module
'("_" ";" "_")
(list *fopl-sentence-seq-sort*
*fopl-sentence-seq-sort*)
*fopl-sentence-seq-sort*))
)
(if (and clause-constructor clause-constructor2
fopl-sentence-seq)
(setq *clause-constructor* clause-constructor
*clause-constructor2* clause-constructor2
*fopl-sentence-seq* fopl-sentence-seq)
(with-output-panic-message ()
(princ "could not install some operators in FOPL-CLAUSE-FORM")))
))
(t (with-output-panic-message ()
(princ "could not find FOPL-CLAUSE-FORM")))
)))
;;; ***************
;;; PRIMITIVE UTILS
;;; ***************
(defun fopl-sentence-type (sentence)
(declare (type term sentence)
(values symbol))
(cond ((term-is-application-form? sentence)
(let ((head (term-head sentence)))
(cond ((eq head *fopl-forall*) :forall)
((eq head *fopl-exists*) :exists)
((eq head *fopl-and*) :and)
((eq head *fopl-or*) :or)
((eq head *fopl-imply*) :imply)
((eq head *fopl-iff*) :iff)
((eq head *fopl-neg*) :not)
((eq head *fopl-eq*) :eq)
((eq head *fopl-beq*) :beq)
(t :atom))))
(t :atom)
))
(declaim (inline fopl-forall?
fopl-exists?
fopl-and?
fopl-or?
fopl-imply?
fopl-iff?
fopl-not?
fopl-eq?
fopl-beq?
))
(defun fopl-forall? (f)
(declare (type term f))
(and (term-is-application-form? f)
(eq (term-head f) *fopl-forall*)))
(defun fopl-exists? (f)
(declare (type term f))
(and (term-is-application-form? f)
(eq (term-head f) *fopl-exists*)))
(defun fopl-and? (f)
(declare (type term f))
(and (term-is-application-form? f)
(eq (term-head f) *fopl-and*)))
(defun fopl-or? (f)
(declare (type term f))
(and (term-is-application-form? f)
(eq (term-head f) *fopl-or*)))
(defun fopl-imply? (f)
(declare (type term f))
(and (term-is-application-form? f)
(eq (term-head f) *fopl-imply*)))
(defun fopl-iff? (f)
(declare (type term f))
(and (term-is-application-form? f)
(eq (term-head f) *fopl-iff*)))
(defun fopl-not? (f)
(declare (type term f))
(and (term-is-application-form? f)
(eq (term-head f) *fopl-neg*)))
(defun fopl-eq? (f)
(declare (type term f))
(and (term-is-application-form? f)
(eq (term-head f) *fopl-eq*)))
(defun fopl-beq? (f)
(declare (type term f))
(and (term-is-application-form? f)
(eq (term-head f) *fopl-beq*)))
;;; IS-VALID-FORMULA? : Tterm -> Bool
;;;
(defun is-valid-formula? (term mod)
(declare (type term term)
(type (or null module) mod))
(unless mod
(with-output-chaos-error ('internal)
(princ "is-valid-formua?: called with no context module given, this should not happen.")))
(is-in-same-connected-component (term-sort term)
*fopl-sentence-sort*
(module-sort-order mod)))
;;;
;;; CHECK-FOPL-SYNTAX
;;;
(defun check-fopl-syntax (fopl-sentence &optional report-error)
(declare (type term fopl-sentence))
(if (and (term? fopl-sentence)
(is-valid-formula? fopl-sentence *current-module*))
(check-fopl-syntax-aux fopl-sentence report-error)
(if report-error
(with-output-chaos-error ('invalid-sentence)
(princ "encoutered with illegal sentence: ")
(print-next)
(print-chaos-object fopl-sentence))
nil)))
(defun check-fopl-syntax-aux (fopl-sentence report-error)
(labels ((check-var-decl (var-decl)
(cond ((term-is-variable? var-decl)
t)
((and (term-is-application-form? var-decl)
(term-subterms var-decl))
(let ((top (term-head var-decl)))
(or (and (method-is-of-same-operator top
*var-decl-list*)
(every #'(lambda (x) (check-var-decl x))
(term-subterms var-decl)))
(if report-error
(with-output-chaos-error ('invalid-formula)
(princ "invaid formula: ")
(print-chaos-object fopl-sentence))
nil))))
(t (if report-error
(with-output-chaos-error ('invalid-formula)
(princ "encounterd with illegal formula")
(print-chaos-object fopl-sentence))
nil)))))
;;
(if (term-is-application-form? fopl-sentence)
(let ((type (fopl-sentence-type fopl-sentence)))
(case type
(:atom t)
((:forall :exists)
(and (check-var-decl (term-arg-1 fopl-sentence))
(check-fopl-syntax-aux (term-arg-2 fopl-sentence)
report-error)))
(:not
(check-fopl-syntax-aux (term-arg-1 fopl-sentence)
report-error))
(otherwise
(and (check-fopl-syntax-aux (term-arg-1 fopl-sentence)
report-error)
(check-fopl-syntax-aux (term-arg-2 fopl-sentence)
report-error)))))
t)
))
;;; EOF
|
