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;; --------------------------------------------------------------------
;; PVS
;; Copyright (C) 2006, SRI International. All Rights Reserved.
;; 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
;; --------------------------------------------------------------------
(in-package :pvs)
(defstep ground-eval (expr &optional destructive?)
(let ((tc-expr (pc-typecheck (pc-parse expr 'expr)))
(cl-expr (let ((*destructive?* destructive?))
(pvs2cl tc-expr)))
(val (time (catch 'undefined (eval cl-expr)))))
(printf "~%~a ~%translates to ~s~%evaluates to ~%~a" expr cl-expr val))
"Ground evaluation of expression EXPR."
"Ground evaluating ~a")
(defvar *destructive?* nil)
(defvar *output-vars* nil)
(defvar *external* nil)
;;lisp-id generates a Lisp identifier for a PVS identifier that
;;doesn't clash with existing Lisp constants and globals.
(defvar *lisp-id-hash* (make-hash-table :test #'eq))
(defun lisp-id (id) ;;id must be a symbol
(if (special-variable-p id)
(let ((lid (gethash id *lisp-id-hash*)))
(or lid
(let ((new-lid (intern (symbol-name (gensym (string id))))))
(setf (gethash id *lisp-id-hash*) new-lid)
new-lid)))
id))
;need to exploit the fact that at most one makes sense
;if external needs actuals, then internal will crash.
(defun make-eval-info (decl)
(unless (eval-info decl)
(setf (eval-info decl)
(make-instance 'eval-info
'internal (make-instance 'eval-defn-info
'unary (make-instance 'eval-defn)
'multiary (make-instance 'eval-defn)
'destructive (make-instance 'eval-defn))
'external (make-instance 'eval-defn-info
'unary (make-instance 'eval-defn)
'multiary (make-instance 'eval-defn)
'destructive (make-instance 'eval-defn))))))
(defun uninterpreted (msg-fmt expr)
(if *evaluator-debug-undefined*
(break "hit undefined term")
(throw 'undefined
(values
'cant-translate
(format nil msg-fmt
(if (declaration? expr)
(format nil "~a.~a"
(id (module expr))
(id expr))
expr))))))
(defun uninterpreted-fun (msg-fmt expr)
#'(lambda (&rest x) (declare (ignore x))(uninterpreted msg-fmt expr)))
(defun undefined (expr &optional message)
(let* ((th (string (if (declaration? expr)
(id (module expr))
(id (current-theory)))))
(nm (when (const-decl? expr)
(string (id expr))))
(ptype (when nm (print-type (type expr))))
(nargs (when nm (arity expr))))
(if (and nm (= nargs 0) ptype (type-name? ptype)
(eq '|Global| (id ptype)))
(let* ((fname (gentemp "global"))
(mod (module-instance
(car (resolutions ptype))))
(act (actuals mod))
(doc (format nil "Global mutable variable of type ~a"
(car act)))
(arg (if (eq 'stdprog (id mod))
'(cons nil t)
`(list ,(pvs2cl (expr (cadr act))))))
(fbody `(progn
(defparameter ,fname ,arg)
(defattach-th-nm ,th ,(id expr) () ,doc ,fname))))
(eval fbody)
(makesym "pvsio_~a_~a_~a" th nm nargs))
(let* ((fname (gentemp "undefined"))
(msg-fmt
(or message
"Hit uninterpreted term ~a during evaluation"))
(fbody (if (and nargs (> nargs 0))
`(defun ,fname (&rest x)
(declare (ignore x))
(uninterpreted-fun ,msg-fmt ,expr))
`(defun ,fname (&rest x)
(declare (ignore x))
(uninterpreted ,msg-fmt ,expr)))))
(eval fbody)
(compile fname)
fname))))
; lisp-function
; lisp-function2
; lisp-definition
; lisp-definition2
; external-lisp-function
; external-lisp-definition
; external-lisp-function2
; external-lisp-definition2)
;;initialize context. If ground expression then translate to common-lisp,
;;evaluate, then translate back.
(defun norm (expr &optional context)
(let ((context (or context *current-context*)))
(cl2pvs (eval (pvs2cl expr)) (type expr) context)))
;;initialize context and translate to common-lisp with null bindings
;;and live-variables, i.e., still active in yet-to-be-evaluated expressions.
(defun pvs2cl (expr &optional context)
(let ((*current-context*
(if context context *current-context*))
(*current-theory* (theory *current-context*))
(*generate-tccs* 'none))
(pvs2cl_up* expr nil nil)))
;;Should be a macro. applied function name to argument list.
(defun mk-funapp (fun args)
`(,fun ,@args))
;;Function application for non-name functions.
;;If function is an array, then svref, else funcall
;;mk-funcall defined to be pvs-funcall for backward compatibility.
(defun mk-funcall (fun args)
`(pvs-funcall ,fun ,@args))
(defun check-output-vars (output-vars alist livevars)
(if (consp output-vars)
(let* ((var (caar output-vars))
(lvars (cdar output-vars))
(vterm (cdr (assoc var alist :test #'same-declaration)))
(lterms (mapcar #'(lambda (x) (cdr (assoc x alist :test #'same-declaration)))
lvars))
(vterm-updateables (updateable-output-vars vterm))
;;NSH(6.10.99) livevars should also be checked (g5 in arrays.pvs)
(lterm-updateables (append (updateable-free-formal-vars lterms)
livevars)))
(cond ((and (null (intersection vterm-updateables
lterm-updateables
:test #'same-declaration))
(check-output-vars (cdr output-vars) alist livevars))
(push-output-vars vterm-updateables lterm-updateables)
; *output-vars*
t)
(t nil)))
t))
(defmethod pvs2cl_up* :around ((expr expr) bindings livevars)
(declare (ignore livevars bindings))
(let ((lisp-type (pvs2cl-lisp-type (type expr))))
(if lisp-type
`(the ,lisp-type
,(call-next-method))
(call-next-method))))
(defmethod pvs2cl_up* ((expr string-expr) bindings livevars)
(declare (ignore bindings livevars))
(string-value expr))
(defun pvs2cl-operator2 (op actuals arguments def-formals livevars bindings)
(declare (ignore bindings))
(pvs2cl-resolution2 op)
(let ((decl (declaration op)))
(if *destructive?*
(let* (;;(decl (declaration op))
(module-formals
(when actuals
(loop for x in (formals (module decl))
when (formal-const-decl? x)
collect x)))
;; (defn (args2 (car (last (def-axiom decl)))))
;; (def-formals (when (lambda-expr? defn)
;; (bindings defn)))
(formals (if actuals
(append module-formals
def-formals)
def-formals))
(eval-defn (if actuals
(ex-defn-d (declaration op))
(in-defn-d (declaration op))))
(output-vars (output-vars eval-defn))
(check (check-output-vars
output-vars
(pairlis
formals
(append actuals
arguments))
livevars)))
(when (and (null check)
*eval-verbose*)
(format t "~%Destructive update check failed on ~a[~{~a,~}](~{~a,~})" op actuals arguments))
(if (or actuals
(eq *external* (module decl)))
(if check
(external-lisp-function-d (declaration op))
(external-lisp-function2 (declaration op)))
(if check
(lisp-function-d (declaration op))
(lisp-function2 (declaration op)))))
(if (or actuals
(eq *external* (module decl)))
(external-lisp-function2 (declaration op))
(lisp-function2 (declaration op))))))
(defmethod make-constant-from-decl ((decl const-decl))
(let* ((type (type decl))
(res (make-resolution decl
(mk-modname (id (module decl)) nil)
type)))
(mk-name-expr (id decl) nil nil res))) ;; 'constant
(defmethod make-constant-from-decl ((decl formal-const-decl))
(let* ((type (type decl))
(res (make-resolution decl
(mk-modname (id (module decl)) nil)
type)))
(mk-name-expr (id decl) nil nil res))) ;; 'constant
;;External application. Actuals, if any, are appended to the
;;front of argument list.
(defun mk-fun2-application (op arguments arg-formals bindings livevars)
(let* ((decl (declaration op))
(actuals (expr-actuals (module-instance op)))
(internal-actuals
(or actuals
(and (eq (module decl) *external*)
(loop for x in (formals (module decl))
when (formal-const-decl? x)
collect (make-constant-from-decl x)))))
(args-free-formals (updateable-vars arguments))
(args-livevars (append args-free-formals livevars))
;; (args (if (= (length (bindings (car (last (butlast (def-axiom decl))))))
;; (length arguments))
;; arguments
;; (list (make!-tuple-expr* arguments))))
)
(if internal-actuals
(mk-funapp
(pvs2cl-operator2 op actuals arguments arg-formals livevars bindings)
(append (pvs2cl_up* internal-actuals
bindings
args-livevars)
(pvs2cl_up* arguments bindings
(append (mapcan #'updateable-free-formal-vars
actuals);;only updateable
;;parameters of already evaluated
;;exprs needed.
livevars))))
(mk-funapp (pvs2cl-operator2 op nil arguments arg-formals
livevars bindings)
;;(pvs2cl-resolution2 op)
(pvs2cl_up* arguments bindings livevars)))))
;;If primitive app, use pvs2cl-primitive-app.
;;If datatype constant, then ignore actuals and use pvs2cl-resolution.
;;If exactly one argument, invoke pvs2cl_up* recursive,
;; else use mk-fun2-application
;;If op is not a constant, then use recursion.
;;NSH(8.31.98): Operator free variables should be live in the arguments
;;in case these appear in the operator closure that is evaluated flg. the
;;arguments.
(defun pvs2cl-primitive-app (expr bindings livevars &optional pvsiosymb)
(let* ((op (operator expr))
(args (arguments expr))
(nargs (length args))
(fn (cond (pvsiosymb pvsiosymb)
((> nargs 1) (pvs2cl-primitive2 op))
(t (pvs2cl-primitive op))))
(xtra (when pvsiosymb (list (type op)))))
(mk-funapp fn (append (pvs2cl_up* args bindings livevars) xtra))))
(defmethod pvs2cl_up* ((expr application) bindings livevars)
(with-slots
(operator argument) expr
(let ((op* (operator* expr)))
(if (constant? op*);;assuming all primitive/datatype ops are
;;not curried.
(let ((pvsiosymb (when (name-expr? op*)
(pvsio-symbol op* (length (arguments expr))))))
(if (or (pvs2cl-primitive? op*) pvsiosymb)
(pvs2cl-primitive-app expr bindings livevars pvsiosymb)
(if (datatype-constant? operator)
(mk-funapp (pvs2cl-resolution operator)
(pvs2cl_up* (arguments expr) bindings livevars))
(pvs2cl-defn-application op* expr bindings livevars))))
(mk-funcall (pvs2cl_up* operator bindings
(append (updateable-vars
argument)
livevars))
(list (pvs2cl_up* argument bindings
(append
(updateable-free-formal-vars operator)
livevars))))))))
(defmethod pvs2cl_up* ((expr equation) bindings livevars)
(cond ((and (set-list-expr? (args1 expr))
(set-list-expr? (args2 expr)))
(let ((set1 (pvs2cl_up* (exprs (args1 expr)) bindings livevars))
(set2 (pvs2cl_up* (exprs (args2 expr)) bindings livevars)))
`(and (subsetp ',set1 ',set2 :test #'equalp) ;;roll into pvs_equalp
(subsetp ',set2 ',set1 :test #'equalp))))
(t (call-next-method))))
(defmethod pvs2cl_up* ((expr disequation) bindings livevars)
(cond ((and (set-list-expr? (args1 expr))
(set-list-expr? (args2 expr)))
(let ((set1 (pvs2cl_up* (exprs (args1 expr)) bindings livevars))
(set2 (pvs2cl_up* (exprs (args2 expr)) bindings livevars)))
`(not (and (subsetp ',set1 ',set2 :test #'equalp) ;;roll into pvs_equalp
(subsetp ',set2 ',set1 :test #'equalp)))))
(t (call-next-method))))
(defun pvs2cl-defn-application (op* expr bindings livevars)
(with-slots (operator argument) expr
(if (constant? op*)
(let* ((defax (def-axiom (declaration op*)))
(defrhs (when defax (args2 (car (last defax)))))
(defbindings* (when (lambda-expr? defrhs)
(bindings* defrhs)))
(args* (loop for ar in (argument* expr)
collect ar)))
(if (and defax
(= (length defbindings*)
(length args*)))
; (loop for bn in defbindings*
; as ar in args*
; always (= (length bn)(length ar))))
;;NSH(6.26.02) This still doesn't handle multiple
;;tuple arguments for curried application.
(mk-fun2-application op*
(loop for ar in args*
as bn in defbindings*
append
(cond ((= (length bn) 1)
(list ar))
((and (> (length bn) 1)
(not (arg-tuple-expr? ar)))
(make-projections ar))
(t (argument-list ar))))
(loop for bn in defbindings*
append bn)
bindings livevars)
(pvs2cl-application operator argument bindings livevars)))
(pvs2cl-application operator argument bindings livevars))))
(defun pvs2cl-application (operator argument bindings livevars)
(let ((clop (pvs2cl_up* operator bindings ;in case of actuals
(append (updateable-vars argument)
livevars)))
(clargs (list (pvs2cl_up* argument
bindings
(append;;check if this should
;;be updateable-vars
(updateable-free-formal-vars operator)
livevars)))))
(if (and (symbolp clop);;if operator is a bound variable.
(not (member clop bindings
:key #'cdr)))
(mk-funapp clop clargs)
(mk-funcall clop clargs))))
(defun pvs2cl-let-pairs (let-bindings argument declaration
cl-expression bindings livevars)
(let ((args (argument-list argument)))
(if (= (length let-bindings) (length args))
(let* ((clargs (pvs2cl_up* args bindings livevars))
(let-pairs (loop for bnd in let-bindings
as clarg in clargs
collect (list bnd clarg))))
(if declaration
`(let ,let-pairs ,declaration ,cl-expression)
`(let ,let-pairs ,cl-expression))) ;;use ,@declaration
(if (= (length let-bindings) 1)
(let* ((clargs (pvs2cl_up* args bindings livevars))
(let-pairs
(list (list (car let-bindings)
(cons 'pvs2cl_tuple clargs)))))
(if declaration
`(let ,let-pairs ,declaration ,cl-expression)
`(let ,let-pairs ,cl-expression)))
(let* ((arg (pvs2cl_up* (car args) bindings livevars))
(argvar (gentemp "A"))
(let-pairs
(loop for bnd in let-bindings
as i from 1
collect (list bnd `(project ,i ,argvar)))))
(if declaration
`(let ((,argvar ,arg))
(let ,let-pairs ,declaration ,cl-expression))
`(let ((,argvar ,arg))
(let ,let-pairs ,cl-expression))))))))
;;above change to pvs2cl-let-pairs simpler but untested.
; (if (consp let-bindings)
; (let ((cl-bnd1 (pvs2cl_up* (car args) bindings)))
; (cons (list (cdar let-bindings) cl-bnd1)
; (pvs2cl-let-pairs (cdr let-bindings)(cdr args)
; (cons (car let-bindings)
; bindings))))
; nil))
;;NSH: pay attention to pattern-matching LETs.
(defun pvs2cl-let-expression (expression bindings livevars
;let-variables
let-pairs
let-bindings)
(cond (*destructive?*
(multiple-value-bind
(cl-expression output-vars)
(let* (;(bvar-expr-pairs (pairlis let-bindings args))
;(var-expr-pairs (pairlis let-variables args))
(*output-vars* nil)
(cl-expression (pvs2cl_up* expression
bindings
livevars))
(check (check-output-vars
*output-vars*
let-pairs
livevars))
(output-vars
(loop for (x . y) in *output-vars*
when (not (member x let-bindings
:test #'same-declaration))
collect
(cons x
(set-difference y let-bindings
:test #'same-declaration)))))
(if check
(values cl-expression output-vars)
(let* ((*destructive?* nil)
(cl-expression (pvs2cl_up* expression
bindings
livevars)))
(values cl-expression nil))))
(loop for (x . y) in output-vars
do (push-output-var x y)) ; *output-vars*
cl-expression))
(t (pvs2cl_up* expression bindings livevars))))
(defmethod pvs2cl_up* ((expr formal-const-decl) bindings livevars)
(declare (ignore livevars))
(let ((result (assoc expr bindings)))
(if result
(cdr result)
(let ((undef (undefined expr "Hit untranslatable term: no binding for ~a")))
`(funcall ',undef)))))
(defun pvs2cl-declare-vars (vars exprs)
(let ((decls (pvs2cl-declare-vars* vars exprs)))
(when decls
`(declare ,@decls))))
(defun pvs2cl-declare-vars* (vars exprs)
(when (consp vars)
(let* ((var (car vars))
(expr (car exprs))
(expr-lisp-type (pvs2cl-lisp-type (type expr))))
(if expr-lisp-type
(cons (list 'type expr-lisp-type var)
(pvs2cl-declare-vars* (cdr vars)(cdr exprs)))
(pvs2cl-declare-vars* (cdr vars)(cdr exprs))))))
(defun pvs2cl-declare-vars-types (vars types)
(let ((decls (loop for var in vars
as typ in types
collect (list 'type (pvs2cl-lisp-type typ) var))))
`(declare ,@decls)))
(defmethod pvs2cl_up* ((expr let-expr) bindings livevars)
(let* ((let-bindings (bindings (operator expr)))
(arg (argument expr))
(args (arguments expr))
(arg-type (find-supertype (type arg)))
(expression (expression (operator expr))))
(let* ((let-variables
(pvs2cl-make-bindings let-bindings bindings))
(let-binding-pairs (pairlis let-bindings let-variables))
(let-vars-args-pairs
(if (= (length let-bindings)(length args));;shouldn't the lengths be equal
(pairlis let-bindings args)
(loop for x in let-bindings ;;can this case occur?
collect (cons x arg))))
(declaration (pvs2cl-declare-vars-types
let-variables
(if (tupletype? arg-type)
(types arg-type)
(list (type arg)))))
(cl-expression (pvs2cl-let-expression
expression (append let-binding-pairs bindings)
livevars
let-vars-args-pairs
let-bindings)))
(pvs2cl-let-pairs
let-variables
arg declaration
cl-expression
bindings;;operator free-formal-vars
;;are always updateable.
(append (updateable-vars (operator expr))
livevars)))))
;;let* not needed, nested anyway.
(defmethod pvs2cl_up* ((expr if-expr) bindings livevars)
(cond ((branch? expr)
(let ((condition (condition expr))
(then-part (then-part expr))
(else-part (else-part expr)))
`(if ,(pvs2cl_up* condition bindings
(append (updateable-vars then-part)
(append (updateable-vars else-part)
livevars)))
,(pvs2cl_up* (then-part expr) bindings livevars)
,(pvs2cl_up* (else-part expr) bindings livevars))))
(t (call-next-method))))
(defmethod pvs2cl_up* ((expr cases-expr) bindings livevars)
(pvs2cl_up* (mk-translate-cases-to-if expr) bindings livevars))
(defmethod pvs2cl_up* ((expr lambda-expr) bindings livevars)
(with-slots ((expr-bindings bindings) expression) expr
(if (and *destructive?*
(singleton? expr-bindings)
(array-bound (type expr))
(application? expression)
(variable? (argument expression))
(same-declaration (car expr-bindings)
(argument expression))
(not (member (car expr-bindings)
(freevars (operator expression))
:test #'same-declaration)))
(pvs2cl_up* (operator expression) bindings livevars)
(pvs2cl-lambda (bindings expr) (expression expr) bindings))))
;;was (updateable-vars expr))) ;;unsafe to update any freevar
(defmethod pvs2cl_up* ((expr forall-expr) bindings livevars)
(let* ((binds (bindings expr))
(body (expression expr)))
(if binds
(let* ((bind1 (car binds))
(typ1 (type bind1))
(sub (simple-subrange? typ1))
(bind-rest (cdr binds))
(expr-rest (if bind-rest
(make!-forall-expr bind-rest body)
body)))
(cond ((enum-adt? (find-supertype typ1))
(if (subtype? typ1)
(pvs2cl_up* (lift-predicates-in-quantifier expr (list (find-supertype typ1)))
bindings livevars)
`(every ,(pvs2cl-lambda (list bind1)
expr-rest
bindings)
;;(append (updateable-vars expr)
;; livevars)
(list ,@(pvs2cl_up* (constructors typ1)
bindings livevars)))))
(sub
(if (and (subtype? typ1)
(simple-subrange? (supertype typ1)))
(pvs2cl_up* (lift-predicates-in-quantifier expr (list (supertype typ1)))
bindings livevars)
(let ((lfrom (if (rational-expr? (car sub))
(number (car sub))
(or (pvs2cl_up* (car sub) bindings livevars)
(let ((undef (undefined (car sub))))
`(funcall ',undef)))))
(lto (if (rational-expr? (cdr sub))
(number (cdr sub))
(or (pvs2cl_up* (cdr sub) bindings livevars)
(let ((undef (undefined (cdr sub))))
`(funcall ',undef)))))
(i (gentemp)))
`(loop for ,i
from ,lfrom
to ,lto
always
(pvs-funcall ,(pvs2cl-lambda (list bind1)
expr-rest
bindings)
;;(append (updateable-vars expr)
;; livevars)
,i)))))
(t (let ((undef (undefined
bind1
(format nil
"Hit non-scalar/subrange variable ~a in ~% ~a"
bind1 expr))))
`(funcall ',undef)))))
(pvs2cl_up* body bindings livevars))))
(defmethod pvs2cl_up* ((expr exists-expr) bindings livevars)
(let* ((binds (bindings expr))
(body (expression expr)))
(if binds
(let* ((bind1 (car binds))
(typ1 (type bind1))
(sub (simple-subrange? typ1))
(bind-rest (cdr binds))
(expr-rest (if bind-rest
(make!-exists-expr bind-rest body)
body)))
(cond ((enum-adt? (find-supertype typ1))
(if (subtype? typ1)
(pvs2cl_up* (lift-predicates-in-quantifier expr (list (find-supertype typ1)))
bindings livevars)
`(some ,(pvs2cl-lambda (list bind1)
expr-rest
bindings)
;;(append (updateable-vars expr)
;; livevars)
(list ,@(pvs2cl_up* (constructors typ1)
bindings livevars)))))
(sub
(if (and (subtype? typ1)
(simple-subrange? (supertype typ1)))
(pvs2cl_up* (lift-predicates-in-quantifier expr (list (supertype typ1)))
bindings livevars)
(let ((lfrom (if (rational-expr? (car sub))
(number (car sub))
(or (pvs2cl_up* (car sub) bindings livevars)
(let ((undef (undefined (car sub))))
`(funcall ',undef)))))
(lto (if (rational-expr? (cdr sub))
(number (cdr sub))
(or (pvs2cl_up* (cdr sub) bindings livevars)
(let ((undef (undefined (cdr sub))))
`(funcall ',undef)))))
(i (gentemp)))
`(loop for ,i
from ,lfrom
to ,lto
thereis
(pvs-funcall ,(pvs2cl-lambda (list bind1)
expr-rest
bindings)
;;(append (updateable-vars expr)
;; livevars)
,i)))))
(t
(let ((undef (undefined expr "Hit non-scalar/subrange quantifier in ~% ~a")))
`(funcall ',undef)))))
(pvs2cl_up* body bindings livevars))))
(defmethod pvs2cl_up* ((expr name-expr) bindings livevars)
(let* ((decl (declaration expr))
(bnd (assoc decl bindings :key #'declaration)))
(assert (not (and bnd (const-decl? decl))))
(if bnd
(if (const-decl? decl)
(mk-funapp (cdr bnd)
(pvs2cl-actuals (expr-actuals (module-instance expr))
bindings livevars))
(cdr bnd))
(if (const-decl? decl)
(pvs2cl-constant expr bindings livevars)
(let ((undef (undefined expr "Hit untranslateable expression ~a")))
`(funcall ',undef))))))
(defmethod pvs2cl_up* ((expr list) bindings livevars)
(if (consp expr)
(cons (pvs2cl_up* (car expr) bindings
(append (updateable-vars (cdr expr)) livevars))
(pvs2cl_up* (cdr expr) bindings ;;need car's freevars
(append (updateable-free-formal-vars (car expr)) ;;f(A, A WITH ..)
livevars)))
nil))
(defmethod pvs2cl_up* ((expr rational-expr) bindings livevars)
(declare (ignore bindings livevars))
(number expr))
(defmethod pvs2cl_up* ((expr tuple-expr) bindings livevars)
(let ((args (pvs2cl_up* (exprs expr) bindings livevars)))
`(pvs2cl_tuple ,@args)))
(defmethod pvs2cl_up* ((expr record-expr) bindings livevars)
;;add special case for strings
(let ((args (pvs2cl_up* (mapcar #'expression
(sort-assignments (assignments expr)))
bindings livevars)))
`(pvs2cl_record ,@args)))
(defmethod pvs2cl_up* ((expr projection-application) bindings livevars)
`(project ,(index expr) ,(pvs2cl_up* (argument expr) bindings livevars)))
(defmethod pvs2cl_up* ((expr injection-application) bindings livevars)
`(inject ,(index expr) ,(pvs2cl_up* (argument expr) bindings livevars)))
(defun sorted-fields (typ)
(let ((restructure (copy-list (fields typ))))
(sort restructure
#'string-lessp
:key #'(lambda (x) (id x)))))
(defun get-field-num (id typ)
(position id (sort-fields (fields typ))
:test #'(lambda (x y) (eq x (id y)))))
(defmethod pvs2cl_up* ((expr field-application) bindings livevars)
(let* ((clarg (pvs2cl_up* (argument expr) bindings livevars))
(argtype (find-supertype (type (argument expr))))
(nonstr `(project ,(1+ (get-field-num (id expr) argtype)) ,clarg)))
nonstr))
(defmethod no-livevars? ((expr update-expr) livevars assignments)
(no-livevars? (expression expr) livevars
(append (assignments expr) assignments)))
(defmethod no-livevars? ((expr t) livevars assignments)
(let* ((updateable-outputs
(updateable-outputs expr))
(check-updateables
(null (intersection updateable-outputs
livevars
:test #'same-declaration)))
(rhs-list (loop for asgn in assignments
collect (expression asgn)))
(check-rhs (check-update-argument rhs-list updateable-outputs))
(rhs-updateables (updateable-free-formal-vars rhs-list))
(live-rhs-updateables
(set-difference rhs-updateables updateable-outputs
:test #'same-declaration)))
(and check-updateables
check-rhs
(cons updateable-outputs (append live-rhs-updateables
livevars)))))
(defvar *fun-lhs* nil)
(defvar *update-args-bindings* nil)
(defvar *lhs-args* nil)
(defun array-bound (type)
(and (funtype? type)
(let ((x (simple-below? (domain type))))
(or x
(let ((y (simple-upto? (domain type))))
(or (and y
(make!-succ y))
(let ((stype (find-supertype type)))
(and (enum-adt? stype)
(1- (length (constructors stype)))))))))))
(defun pvs2cl-update (expr assigns bindings livevars)
(let* ((expr-type (find-supertype (type expr)))
(cl-expr (pvs2cl_up* expr bindings
;;RHS vars needed here in case
;;expr tries to update one of them.
(append (loop for x in assigns
nconc
(updateable-free-formal-vars
(expression x)))
livevars))))
(pvs2cl-update* expr-type cl-expr
assigns bindings
(append (updateable-vars expr) livevars))))
(defun pvs2cl-update* (type cl-expr assigns bindings livevars)
(if (consp assigns)
(let* ((args (arguments (car assigns)))
(rhs-expr (expression (car assigns)))
(rhsvar (gentemp "RHS"))
(rhs (pvs2cl_up* rhs-expr bindings
livevars))
(cl-expr (if (funtype? type)
(let* ((bound (array-bound type)));;NSH(9-19-12)
(if bound ;;then cl-expr is an array
(let ((cl-bound (pvs2cl_up* bound
bindings livevars)))
`(mk-fun-array ,cl-expr ,cl-bound))
`(make-closure-hash ,cl-expr)))
;;else it is a function and we make a closure-hash
cl-expr))
(exprvar (gentemp "E")))
(let* ((*lhs-args* nil)
(new-cl-expr
(pvs2cl-update-assign-args type exprvar args rhsvar
bindings
(append (updateable-vars rhs-expr)
livevars)))
(lhs-bindings (nreverse *lhs-args*))
(new-expr-body `(let ((,rhsvar ,rhs)
(,exprvar ,cl-expr))
;;(declare ((simple-array t) ,exprvar))
,new-cl-expr
,exprvar))
(newexpr-with-let
(if lhs-bindings
`(let ,lhs-bindings ,new-expr-body)
new-expr-body))
)
(pvs2cl-update*
type newexpr-with-let (cdr assigns) bindings
;;because later assignments are evaluated first.
(append (updateable-vars (car assigns))
livevars))))
cl-expr))
;;main point is that nested translations for arrays must be
;;nondestructive since there is a possibility of aliasing.
(defmethod pvs2cl-update-assign-args ((type funtype) cl-expr args rhs
bindings livevars)
(let* ((args1 (car args))
(cl-args1 (pvs2cl_up* (car args1) bindings
livevars))
(lhsvar (gentemp "LHS"))
(bound (array-bound type))
(cl-bound (when bound (pvs2cl_up* bound
bindings livevars)))
(cl-expr (if (symbolp cl-expr)
cl-expr
(if bound
`(mk-fun-array ,cl-expr ,cl-bound ,lhsvar)
`(make-closure-hash ,cl-expr))))
(cl-expr-var (gentemp "E"))
(newexpr (if bound `(aref ,cl-expr-var ,lhsvar)
`(pvs-closure-hash-lookup ,cl-expr-var ,lhsvar)))
(newrhs (if (null (cdr args))
rhs
(pvs2cl-update-nd-type
(range type) newexpr (cdr args) rhs
bindings livevars))))
(push (list lhsvar cl-args1) *lhs-args*)
(if bound
`(pvs-setf ,cl-expr ,lhsvar ,newrhs)
`(pvs-function-update ,cl-expr ,lhsvar ,newrhs))))
(defun make-closure-hash (expr) ;;NSH(9-19-12)
(if (pvs-closure-hash-p expr)
expr
(mk-pvs-closure-hash (make-hash-table :test 'pvs_equalp) expr)))
(defmethod pvs2cl-update-assign-args ((type subtype) cl-expr args rhs
bindings livevars)
(pvs2cl-update-assign-args (find-supertype type) cl-expr args
rhs bindings livevars))
(defmethod pvs2cl-update-assign-args ((type recordtype) cl-expr args rhs
bindings livevars)
(let* ((args1 (car args))
(id (id (car args1)))
(fields (sort-fields (fields type)))
(field-num (position id fields :test #'(lambda (x y) (eq x (id y)))))
(cl-expr-var (gentemp "E"))
(newexpr `(svref ,cl-expr-var ,field-num))
(field-type (type (find id fields :key #'id) ))
(dep-fields (sort-fields (fields type) t));;dependent sort
(new-bindings (pvs2cl-add-dep-field-bindings dep-fields fields id
cl-expr-var bindings))
(other-updateable-types ;;to prevent updates to aliases
(loop for fld in (fields type)
when (not (eq id (id fld)))
nconc (top-updateable-types (type fld) nil)))
(rhs-var (gentemp "R"))
(newrhs (if (null (cdr args))
rhs
(if (member field-type
other-updateable-types
:test #'compatible?)
(pvs2cl-update-nd-type
field-type newexpr (cdr args) rhs
new-bindings livevars)
(pvs2cl-update-assign-args
field-type newexpr (cdr args) rhs
new-bindings livevars)))))
`(let* ((,cl-expr-var ,cl-expr)
(,rhs-var ,newrhs))
(rec-tup-update ,cl-expr-var ,field-num ,rhs-var)
,cl-expr-var)))
; `(let ((,cl-expr-var ,cl-expr))
; (declare (simple-array ,cl-expr-var))
; (setf ,newexpr ,newrhs)
; ,cl-expr-var)))
(defmethod pvs2cl-update-assign-args ((type tupletype) cl-expr args rhs
bindings livevars)
(let* ((args1 (car args))
(num (number (car args1)))
(cl-expr-var (gentemp "E"))
(newexpr `(project ,cl-expr-var ,num))
(types (types type))
(tupsel-type (nth (1- num) types))
(other-updateable-types
(loop for fld in types
as pos from 1
when (not (eql pos num))
nconc (top-updateable-types fld nil)))
(new-bindings (pvs2cl-add-dep-tuple-bindings types (1- num) 0 cl-expr-var
bindings))
(rhs-var (gentemp "R"))
(newrhs (if (null (cdr args))
rhs
(if (member tupsel-type
other-updateable-types
:test #'compatible?)
(pvs2cl-update-nd-type
tupsel-type newexpr (cdr args) rhs
new-bindings livevars)
(pvs2cl-update-assign-args
tupsel-type newexpr (cdr args) rhs
new-bindings livevars)))))
`(let* ((,cl-expr-var ,cl-expr)
(,rhs-var ,newrhs))
(setf (svref ,cl-expr ,(1- num)) ,rhs-var)
,cl-expr-var)))
(defun pvs2cl-add-dep-tuple-bindings (dep-tuple-types position index expr bindings)
(if (eql position index)
bindings
(if (binding? (car dep-tuple-types))
(pvs2cl-add-dep-tuple-bindings (cdr dep-tuple-types) position (1+ index)
expr
(acons (car dep-tuple-types)
`(svref ,expr ,position) bindings))
(pvs2cl-add-dep-tuple-bindings (cdr dep-tuple-types)
position (1+ index) expr
bindings))))
(defun mk-fun-array (expr size &optional update-index) ;;okay to use aref here instead of pvs-setf
(cond ((or (simple-vector-p expr)
(hash-table-p expr) (null size))
expr)
((vectorp expr)
(let ((arraysize (array-total-size expr)))
(if (< arraysize size);;then resize, else do nothing
(adjust-array expr (resize-newsize arraysize size)))
(setf (fill-pointer expr) size)
expr))
((pvs-outer-array-p expr)
(let* ((arr (make-array size :initial-element 0
:fill-pointer size
:adjustable t))
(inner-array (pvs-outer-array-inner-array expr))
(contents (pvs-array-contents inner-array))
(inner-size (pvs-array-size inner-array))
(offset (pvs-outer-array-offset expr))
(outer-diffs (pvs-outer-array-diffs expr))
(inner-diffs (pvs-array-diffs inner-array)))
(loop for i from 0 to (1- size)
unless (eql i update-index)
do (setf (aref arr i)(aref contents i)))
(loop for (x . y) in inner-diffs
as i from (1+ offset) to inner-size
do (setf (aref arr x) y))
(insert-array-diffs outer-diffs arr)))
(t (let ((arr (make-array size :initial-element 0
:fill-pointer size
:adjustable t)))
(loop for i from 0 to (1- size);;unless avoids evaluating expr on
unless (eql i update-index) do ;;newly expanded index
(setf (aref arr i)(funcall expr i)))
arr))))
(defun resize-newsize (arraysize newsize)
(if (< arraysize newsize)
(resize-newsize (* 2 (max arraysize 1)) newsize)
arraysize))
(defun push-output-vars (updateable-vars livevars)
(loop for x in updateable-vars
do (push-output-var x livevars))
*output-vars*)
(defun push-output-var (updateable-var livevars )
(let ((x-output (assoc (declaration updateable-var) *output-vars*
:key #'declaration)))
(if x-output
(loop for y in livevars
do (pushnew y (cdr x-output)
:test #'same-declaration))
(push (cons updateable-var livevars) *output-vars*))))
(defmethod pvs2cl-update-nondestructive
((expr update-expr) bindings livevars)
(with-slots (type expression assignments) expr
(let* ((assign-exprs (mapcar #'expression assignments))
(cl-expr (pvs2cl_up* expression bindings
(append (updateable-free-formal-vars
assign-exprs)
;;assign-args can be ignored
livevars))))
(pvs2cl-update-nondestructive* (type expression)
cl-expr
(mapcar #'arguments assignments)
assign-exprs
bindings
(append (updateable-vars expression)
livevars)))))
;;recursion over updates in an update expression
(defun pvs2cl-update-nondestructive*
(type expr assign-args assign-exprs bindings livevars)
(if (consp assign-args)
(let* ((*lhs-args* nil)
(exprvar (gentemp "E"))
(assign-exprvar (gentemp "N"))
(cl-assign-expr
(pvs2cl_up* (car assign-exprs)
bindings
(append (updateable-vars (cdr assign-exprs))
(append (updateable-vars (cdr assign-args))
livevars))))
(newexpr (pvs2cl-update-nd-type
type exprvar
(car assign-args)
assign-exprvar
bindings
(append (updateable-vars (car assign-exprs))
(append (updateable-vars (cdr assign-exprs))
(append (updateable-vars (cdr assign-args))
livevars)))))
(lhs-bindings (nreverse *lhs-args*))
(newexpr-with-let
`(let ,lhs-bindings
(let ((,assign-exprvar ,cl-assign-expr)
(,exprvar ,expr))
,newexpr))))
(pvs2cl-update-nondestructive*
type
newexpr-with-let
(cdr assign-args)(cdr assign-exprs) bindings
(append (updateable-free-formal-vars (car assign-exprs))
livevars)))
expr))
;;recursion over nested update arguments in a single update.
(defun pvs2cl-update-nd-type (type expr args assign-expr
bindings livevars)
(if (consp args)
(pvs2cl-update-nd-type* type expr (car args) (cdr args) assign-expr
bindings livevars)
assign-expr))
(defmethod pvs2cl-update-nd-type* ((type funtype) expr arg1 restargs
assign-expr bindings livevars)
(let* ((bound (array-bound type))
(cl-bound (pvs2cl_up* bound bindings livevars))
(arg1var (gentemp "A"))
(cl-arg1 (pvs2cl_up* (car arg1) bindings
(append (updateable-vars restargs)
livevars)))
(newexpr (pvs2cl-update-nd-type
(range type) (mk-funcall expr (list arg1var))
restargs assign-expr bindings livevars)))
(push (list arg1var cl-arg1) *lhs-args*)
`(pvs-outer-array-update ,expr ,arg1var ,newexpr ,cl-bound)))
(defmethod pvs2cl-update-nd-type* ((type recordtype) expr arg1 restargs
assign-expr bindings livevars)
(let* ((id (id (car arg1)))
(fields (sort-fields (fields type)))
(field-num (position id fields :test #'(lambda (x y) (eq x (id y)))))
(cl-expr-var (gentemp "E"))
(new-expr `(svref ,cl-expr-var ,field-num))
(field-type (type (find id fields :key #'id) ))
(dep-fields (sort-fields (fields type) t));;dependent sort
(new-bindings (pvs2cl-add-dep-field-bindings dep-fields fields id
cl-expr-var bindings))
(newval (pvs2cl-update-nd-type field-type new-expr
restargs assign-expr new-bindings
livevars)))
`(let ((,cl-expr-var ,expr))
(nd-rec-tup-update ,expr ,field-num ,newval))))
(defun pvs2cl-add-dep-field-bindings (dep-field-types field-types field-id expr bindings)
(if (consp dep-field-types)
(if (eq (id (car dep-field-types)) field-id)
bindings
(if (binding? (car field-types))
(let ((index (position (id (car dep-field-types)) field-types
:test #'(lambda (x y)(eq x (id y))))))
(pvs2cl-add-dep-field-bindings (cdr dep-field-types)
field-types field-id expr
(acons (car dep-field-types)
`(svref ,expr ,index) bindings)))
(pvs2cl-add-dep-field-bindings (cdr dep-field-types)
field-types field-id expr
bindings)))
bindings))
(defmethod pvs2cl-update-nd-type* ((type tupletype) expr arg1 restargs
assign-expr bindings livevars)
(let* ((num (number (if (consp arg1) (car arg1) arg1)))
(new-expr `(svref ,expr ,(1- num)))
(tupsel-type (nth (1- num)(types type)))
(newval (pvs2cl-update-nd-type tupsel-type new-expr
restargs assign-expr bindings
livevars)))
`(nd-rec-tup-update ,expr ,num ,newval)))
(defmethod pvs2cl-update-nd-type* ((type subtype) expr arg1 restargs
assign-expr bindings livevars)
(pvs2cl-update-nd-type* (find-supertype type) expr arg1 restargs
assign-expr bindings livevars))
;;assign-arg-livevars can be ignored since args are evaluated before
;;expression and have no updateable results.
;;even the RHS-livevars can be ignored since the nested updates
;;are done nondestructively.
(defmethod pvs2cl_up* ((expr update-expr) bindings livevars)
(if (updateable? (type (expression expr)))
(if (and *destructive?*
(not (some #'maplet? (assignments expr))))
(let* ((expression (expression expr))
(assignments (assignments expr))
(updateable-livevars
(no-livevars? expression livevars assignments))
; (check-assign-types
; (loop for assgn in assignments
; always
; (not (contains-possible-closure?
; (type (expression assgn))))))
)
;;very unrefined: uses all
;;freevars of eventually updated expression.
(cond (updateable-livevars ;; check-assign-types
(push-output-vars (car updateable-livevars)
(cdr updateable-livevars))
(pvs2cl-update expression
assignments
bindings livevars))
(t
(when (and *eval-verbose* (not updateable-livevars))
(format t "~%Update ~s translated nondestructively.
Live variables ~s present" expr livevars))
; (when (and *eval-verbose* (not check-assign-types))
; (format t "~%Update ~s translated nondestructively.
; Assignment right-hand sides contain possible function types that can
; trap references." expr))
(pvs2cl-update-nondestructive expr
bindings livevars))))
(pvs2cl-update-nondestructive expr bindings livevars))
(pvs2cl_up* (translate-update-to-if! expr)
bindings livevars)))
(defun pvs2cl-newid (id bindings)
(loop for i from 0
thereis
(let ((tmp
(makesym "~a#~a" id i)))
(and (null (rassoc tmp bindings))
tmp))))
(defun pvs2cl-lambda (bind-decls expr bindings) ;;removed livevars
(let* ((*destructive?* nil)
(bind-ids (pvs2cl-make-bindings bind-decls bindings))
(cl-body (pvs2cl_up* expr
(append (pairlis bind-decls bind-ids)
bindings)
nil))) ;;NSH(6-26-02) was livevars
(if (eql (length bind-ids) 1)
`(function (lambda ,bind-ids ,cl-body))
(let* ((lamvar
(pvs2cl-newid 'lamvar bindings))
(letbind
(loop for bind in bind-ids
as i from 1
collect
`(,bind (project ,i ,lamvar))))
(let-decls (pvs2cl-declare-vars bind-ids bind-decls)))
(if let-decls
`(function
(lambda (,lamvar)
(let ,letbind ,let-decls ,cl-body)))
`(function
(lambda (,lamvar)
(let ,letbind ,cl-body))))))))
(defun pvs2cl-make-bindings (bind-decls bindings)
(if (consp bind-decls)
(let* ((bb (car bind-decls))
(id (id bb))
(newid (if (null (rassoc id bindings))
(lisp-id id)
(pvs2cl-newid (id bb) bindings))))
(cons newid (pvs2cl-make-bindings (cdr bind-decls) bindings)))
nil))
(defun pvs2cl-bindings (bind-decls bindings)
(if (consp bind-decls)
(let* ((bind (car bind-decls))
(newid
(if (rassoc bind bindings)
(pvs2cl-newid (id bind) bindings)
(lisp-id (id bind)))))
(pvs2cl-bindings (cdr bind-decls)
(cons (cons bind newid) bindings)))
bindings))
(defparameter *primitive-constants* '(TRUE FALSE |null|))
(defun pvs2cl-constant (expr bindings livevars)
(cond ((pvs2cl-primitive? expr)
(if (memq (id expr) *primitive-constants*) ;the only constants
(pvs2cl-primitive expr) ;else need to return a closure
`(function ,(pvs2cl-primitive expr))))
((lazy-random-function? expr)
(generate-lazy-random-lisp-function expr))
(t
(let* ((nargs (if (funtype? (type expr)) (arity expr) 0))
(pvsiosymb (pvsio-symbol expr nargs)))
(cond ((and pvsiosymb (= nargs 0))
(mk-funapp pvsiosymb (list (type expr)))) ; it's a PVSio constant
(pvsiosymb `(function ,pvsiosymb)) ; need to return a closure (it's a PVSio function)
(t
(pvs2cl-resolution expr)
(if (datatype-constant? expr)
(if (scalar-constant? expr)
(lisp-function (declaration expr))
(let ((fun (lisp-function (declaration expr))))
(if (not (funtype? (find-supertype (type expr))))
(mk-funapp fun nil)
`(function ,fun))));;actuals irrelevant for datatypes
(let* ((actuals (expr-actuals (module-instance expr)))
(decl (declaration expr))
(internal-actuals
(or actuals
(and (eq (module decl) *external*)
(loop for x in (formals (module decl))
when (formal-const-decl? x)
collect (make-constant-from-decl x)))))
(defns (def-axiom decl))
(defn (when defns (args2 (car (last (def-axiom decl))))))
(def-formals (when (lambda-expr? defn)
(bindings defn)))
(fun (or (lisp-function (declaration expr))
(if defns
(if def-formals
(if internal-actuals
(external-lisp-function (declaration expr))
(lisp-function (declaration expr)))
(pvs2cl-operator2 expr actuals nil nil
livevars bindings))
(if internal-actuals
(external-lisp-function (declaration expr))
(lisp-function (declaration expr)))))))
(assert fun)
(mk-funapp fun (pvs2cl_up* internal-actuals
bindings livevars))))))))))
(defun expr-actuals (modinst)
(loop for act in (actuals modinst)
when (null (type-value act))
collect (expr act)))
(defun pvs2cl-actuals (actuals bindings livevars)
(if (consp actuals)
(if (type-value (car actuals))
(pvs2cl-actuals (cdr actuals) bindings livevars)
(cons (pvs2cl_up* (expr (car actuals)) bindings livevars)
(pvs2cl-actuals (cdr actuals) bindings livevars)))
nil))
(defun datatype-constant? (expr)
(adt-name-expr? expr))
(defun pvs2cl-resolution2 (expr)
(pvs2cl-resolution expr)
(if (or (expr-actuals (module-instance expr))
(eq (module (declaration expr)) *external*))
(external-lisp-function2 (declaration expr))
(lisp-function2 (declaration expr))))
(defun lisp-function (decl)
(or (in-name decl)(in-name-m decl)))
(defun lisp-function2 (decl)
(or (in-name-m decl)(in-name decl)))
(defun external-lisp-function (decl)
(or (ex-name decl)(ex-name-m decl)))
(defun external-lisp-function2 (decl)
(or (ex-name-m decl)(ex-name decl)))
(defun lisp-function-d (decl)
(or (in-name-d decl)(lisp-function2 decl)))
(defun external-lisp-function-d (decl)
(or (ex-name-d decl)(external-lisp-function2 decl)))
(defun pvs2cl-resolution (expr)
(let* ((decl (declaration expr))
(*current-context* (saved-context (module decl)))
(*current-theory* (theory *current-context*)))
(unless (eval-info decl)
(make-eval-info decl))
(if (datatype-constant? expr)
(or (lisp-function (declaration expr))
(pvs2cl-datatype expr))
(if (or (eq (module decl) *external*)
(expr-actuals (module-instance expr)));;datatype-subtype?
(or (external-lisp-function (declaration expr))
(pvs2cl-external-lisp-function (declaration expr)))
(or (lisp-function (declaration expr))
(pvs2cl-lisp-function (declaration expr)))))))
(defun mk-newsymb (x &optional (counter 0))
(let ((str (format nil "~a_~a" x counter)))
(if (find-symbol str)
(mk-newsymb x (1+ counter))
(intern str))))
(defun mk-newfsymb (x &optional counter)
(let ((fsym (intern (format nil "~a~@[_~a~]" x counter))))
(if (fboundp fsym)
(mk-newfsymb x (if counter (1+ counter) 0))
fsym)))
(defun pvs2cl-id (x)
(if (eq (id x) 'O)
'o
(id x)))
(defun pvs2cl-external-lisp-function (decl)
(let* ((defax (def-axiom decl))
(*external* (module decl))
(*current-theory* (module decl)))
(cond ((null defax)
(let ((undef (undefined decl)))
(make-eval-info decl)
(setf (ex-name decl) undef
(ex-name-m decl) undef
(ex-name-d decl) undef)
undef))
(t (let ((formals (loop for x in (formals (module decl))
when (formal-const-decl? x)
collect x)))
(if (null formals)
(or (lisp-function decl)
(pvs2cl-lisp-function decl))
(let* ((id (mk-newfsymb (format nil "~a_~a"
(id (module decl))
(pvs2cl-id decl))))
(id-d (mk-newfsymb (format nil "~a!~a"
(id (module decl))
(pvs2cl-id decl))))
(formal-ids (loop for x in formals
collect (lisp-id (id x))))
(bindings (pairlis formals formal-ids))
(defn (args2 (car (last defax))))
(defn-bindings (when (lambda-expr? defn)
(loop for bnd in
(bindings* defn)
append bnd)))
(defn-expr (body* defn))
(defn-binding-ids
(make-binding-ids-without-dups defn-bindings nil))
(formal-ids2 (append formal-ids
defn-binding-ids))
(declarations
(pvs2cl-declare-vars formal-ids2
(append formals defn-bindings))))
(make-eval-info decl)
(setf (ex-name decl) id)
(let ((id2 (mk-newfsymb (format nil "~a__~a"
(id (module decl))
(pvs2cl-id decl)))))
(setf (ex-name-m decl) id2)
(let ((*destructive?* nil))
(setf (definition (ex-defn-m decl))
`(defun ,id2 ,formal-ids2
,@(append (when declarations
(list declarations))
(list
(pvs2cl_up* defn-expr
(append (pairlis
defn-bindings
defn-binding-ids)
bindings)
nil))))))
(eval (definition (ex-defn-m decl)))
(assert id2)
(compile id2))
(setf (ex-name-d decl) id-d)
(let ((*destructive?* t)
(*output-vars* nil))
(setf (definition (ex-defn-d decl))
`(defun ,id-d ,formal-ids2
,declarations
,@(append (when declarations
(list declarations))
(list
(pvs2cl-till-output-stable
(ex-defn-d decl)
defn-expr
(append (pairlis defn-bindings
defn-binding-ids)
bindings)
nil)))))
;;setf output-vars already in
;;pvs2cl-till-output-stable
(setf (output-vars (ex-defn-d decl)) *output-vars*))
(eval (definition (ex-defn-d decl)))
(assert id-d)
(compile id-d)
(let ((*destructive?* nil)
(declarations (pvs2cl-declare-vars formal-ids formals)))
(setf (definition (ex-defn decl))
`(defun ,id ,formal-ids
,@(append (when declarations
(list declarations))
(list
(pvs2cl_up* defn bindings nil))))))
(eval (definition (ex-defn decl)))
(assert id)
(compile id))))))))
(defun pvs2cl-till-output-stable (defn-slot expr bindings livevars)
(let ((old-outputvars (copy-list *output-vars*))
(cl-expr (pvs2cl_up* expr bindings livevars)))
(cond ((equal old-outputvars *output-vars*)
cl-expr)
(t (setf (output-vars defn-slot) *output-vars*)
(pvs2cl-till-output-stable defn-slot expr bindings livevars)))))
(defmethod body* ((expr lambda-expr))
(body* (expression expr)))
(defmethod body* ((expr t))
expr)
(defun make-binding-ids-without-dups (bindings aux)
(if (consp bindings)
(let ((id (id (car bindings))))
(if (or (memq id aux)
(special-variable-p id)
(constantp id)) ; SO 2002-07-31 - lisp constants are also
; problematic (e.g., t or nil).
(make-binding-ids-without-dups
(cdr bindings)
(cons (gentemp (string id)) aux))
(make-binding-ids-without-dups
(cdr bindings)
(cons id aux))))
(nreverse aux)))
(defun pvs2cl-lisp-function (decl)
(let* ((defax (def-axiom decl))
(*external* nil))
(cond ((null defax)
(let ((undef (undefined decl)))
(setf (in-name decl) undef
(in-name-m decl) undef
(in-name-d decl) undef)
undef))
(t (let* ((id (mk-newfsymb (format nil "~@[~a_~]~a"
(generated-by decl) (pvs2cl-id decl))))
(id-d (mk-newfsymb (format nil "~@[~a_~]~a!"
(generated-by decl)
(pvs2cl-id decl))))
(defn (args2 (car (last (def-axiom decl)))))
(defn-bindings (when (lambda-expr? defn)
(loop for bnd in
(bindings* defn)
append bnd)))
(defn-body (body* defn))
(defn-binding-ids
(make-binding-ids-without-dups defn-bindings nil))
(declarations (pvs2cl-declare-vars defn-binding-ids
defn-bindings)))
(setf (in-name decl) id)
(let ((id2 (mk-newfsymb (format nil "_~@[~a_~]~a"
(generated-by decl)
(pvs2cl-id decl)))))
(when *eval-verbose*
(format t "~%~a ~a" (id decl) id2))
(setf (in-name-m decl) id2)
(let ((*destructive?* nil))
(setf (definition (in-defn-m decl))
`(defun ,id2 ,defn-binding-ids
,@(append (when declarations
(list declarations))
(list
(pvs2cl_up* defn-body
(pairlis defn-bindings
defn-binding-ids)
nil))))))
(eval (definition (in-defn-m decl)))
(assert id2)
(compile id2))
(when *eval-verbose*
(format t "~%~a ~a" (id decl) id-d))
(setf (in-name-d decl) id-d)
(let ((*destructive?* t)
(*output-vars* nil))
(setf (definition (in-defn-d decl))
`(defun ,id-d ,defn-binding-ids
,@(append (when declarations
(list declarations))
(list
(pvs2cl-till-output-stable
(in-defn-d decl)
defn-body
(pairlis defn-bindings
defn-binding-ids)
nil)))))
;;setf output-vars already in
;;pvs2cl-till-output-stable
(setf (output-vars (in-defn-d decl))
*output-vars*))
(eval (definition (in-defn-d decl)))
(assert id-d)
(compile id-d)
(when *eval-verbose*
(format t "~%~a ~a" (id decl) id))
(let ((*destructive?* nil))
(setf (definition (in-defn decl))
`(defun ,id ()
,(pvs2cl_up* defn nil nil))))
(eval (definition (in-defn decl)))
(assert id)
(compile id))))))
(defun pvs2cl-theory (theory &optional force?)
(let* ((theory (get-theory theory))
(*current-theory* theory)
(*current-context* (context theory)))
(cond ((datatype? theory)
(let ((adt (adt-type-name theory)))
(pvs2cl-constructors (constructors adt) adt))
(pvs2cl-theory (adt-theory theory))
(let ((map-theory (adt-map-theory theory))
(reduce-theory (adt-reduce-theory theory)))
(when map-theory (pvs2cl-theory (adt-map-theory theory)))
(when reduce-theory (pvs2cl-theory (adt-reduce-theory theory)))))
(t (loop for decl in (theory theory)
do (cond ((type-eq-decl? decl)
(let ((dt (find-supertype (type-value decl))))
(when (adt-type-name? dt)
(pvs2cl-constructors (constructors dt) dt))))
((datatype? decl)
(let ((adt (adt-type-name decl)))
(pvs2cl-constructors (constructors adt) adt)))
((const-decl? decl)
(unless (eval-info decl)
(progn
(make-eval-info decl)
(or (external-lisp-function decl)
(pvs2cl-external-lisp-function decl))
(or (lisp-function decl)
(pvs2cl-lisp-function decl)))))
(t nil)))))))
(defun pvs2cl-datatype (expr)
(let* ((dt (adt expr))
(constructors (constructors dt)))
(pvs2cl-constructors constructors dt)
(lisp-function (declaration expr))))
(defun pvs2cl-constructors (constrs datatype)
;; First create the structures, in case there are shared accessors
(let ((structs (unless (enum-adt? datatype) (mk-newconstructors constrs))))
(pvs2cl-constructors* constrs structs structs datatype)))
(defun pvs2cl-constructors* (constrs structs all-structs datatype)
(when constrs
(cons (pvs2cl-constructor (car constrs) (car structs) all-structs datatype)
(pvs2cl-constructors* (cdr constrs) (cdr structs)
all-structs datatype))))
(defun mk-newconstructors (constrs)
(mapcar #'(lambda (constructor)
(let* ((id (id constructor))
(accessors (accessors constructor))
(accessor-ids (mapcar #'id accessors))
(struct-id (mk-newconstructor id accessor-ids))
(recognizer-id (makesym "~a?" struct-id))
(constructor-symbol (makesym "make-~a" struct-id))
(defn `(defstruct (,struct-id
(:constructor ,constructor-symbol
,accessor-ids)
(:predicate ,recognizer-id))
,@accessor-ids)))
(eval defn)
(cons struct-id defn)))
constrs))
(defun mk-newconstructor (id accessor-ids &optional (counter 0))
(let* ((const-str (format nil "~a_~a" id counter))
(const-str? (find-symbol const-str))
(mk-str? (find-symbol (format nil "make-~a" const-str)))
(rec-str? (find-symbol (format nil "~a?" const-str)))
(acc-strs? (loop for acc in accessor-ids
thereis
(find-symbol (format nil "~a_~a"
const-str
acc)))))
(if (or const-str? mk-str? rec-str? acc-strs?)
(mk-newconstructor id accessor-ids (1+ counter))
(intern const-str))))
(defun pvs2cl-constructor (constructor struct all-structs datatype)
(let ((decl (declaration constructor)))
(or (and (eval-info decl)
(lisp-function decl))
;;above test duplicated in pvs2cl-resolution
(cond ((enum-adt? datatype)
(let* ((pos (position (id constructor)
(constructors (adt datatype))
:test #'eq :key #'id))
(recognizer (recognizer constructor))
(rec-decl (declaration recognizer))
(rec-id (mk-newsymb (id recognizer)))
(rec-defn `(defun ,rec-id (x) (eql x ,pos))))
(make-eval-info decl)
(setf (in-name decl) pos)
(make-eval-info rec-decl)
(setf (in-name rec-decl) rec-id)
(setf (definition (in-defn rec-decl))
rec-defn)
(eval rec-defn)
(compile rec-id)
pos))
(t (let* ((accessors (accessors constructor))
(struct-id (car struct))
(constructor-symbol (makesym "make-~a" struct-id))
(defn (cdr struct)))
(make-eval-info (declaration constructor))
(setf (definition (in-defn (declaration constructor)))
defn)
(setf (in-name (declaration constructor))
constructor-symbol)
(make-eval-info (declaration (recognizer constructor)))
(setf (in-name (declaration (recognizer constructor)))
(makesym "~a?" struct-id))
(loop for x in accessors
do (unless (eval-info (declaration x))
(make-eval-info (declaration x))
(setf (in-name (declaration x))
(pvs2cl-accessor-defn
(declaration x) struct-id all-structs
datatype))))
))))))
(defmethod pvs2cl-accessor-defn ((acc adt-accessor-decl)
struct-id all-structs datatype)
(declare (ignore all-structs datatype))
(makesym "~a-~a" struct-id (id acc)))
(defmethod pvs2cl-accessor-defn ((acc shared-adt-accessor-decl) struct-id
all-structs datatype)
(declare (ignore struct-id))
(let* ((acc-id (makenewsym "~a-~a" (id datatype) (id acc)))
(var (gentemp))
(constr-structs (pairlis (constructors datatype) all-structs))
(defn `(defun ,acc-id (,var)
(typecase ,var
,@(mapcar #'(lambda (cid)
(let ((struct (cdr (assoc cid constr-structs
:key #'id))))
(assert struct)
(list (car struct)
(list (makesym "~a-~a"
(car struct) (id acc))
var))))
(constructors acc))))))
(eval defn)
acc-id))
(defparameter *pvs2cl-primitives*
(list (mk-name '= nil '|equalities|)
(mk-name '/= nil '|notequal|)
(mk-name 'TRUE nil '|booleans|)
(mk-name 'FALSE nil '|booleans|)
(mk-name 'IMPLIES nil '|booleans|)
(mk-name '=> nil '|booleans|)
(mk-name '<=> nil '|booleans|)
(mk-name 'AND nil '|booleans|)
(mk-name '& nil '|booleans|)
(mk-name 'OR nil '|booleans|)
(mk-name 'NOT nil '|booleans|)
(mk-name 'WHEN nil '|booleans|)
(mk-name 'IFF nil '|booleans|)
(mk-name '+ nil '|number_fields|)
(mk-name '- nil '|number_fields|)
(mk-name '* nil '|number_fields|)
(mk-name '/ nil '|number_fields|)
(mk-name '|number_field_pred| nil '|number_fields|)
(mk-name '< nil '|reals|)
(mk-name '<= nil '|reals|)
(mk-name '> nil '|reals|)
(mk-name '>= nil '|reals|)
(mk-name '|real_pred| nil '|reals|)
(mk-name '|integer_pred| nil '|integers|)
(mk-name '|integer?| nil '|integers|)
(mk-name '|rational_pred| nil '|rationals|)
(mk-name '|floor| nil '|floor_ceil|)
(mk-name '|ceiling| nil '|floor_ceil|)
(mk-name '|rem| nil '|modulo_arithmetic|)
(mk-name '|ndiv| nil '|modulo_arithmetic|)
(mk-name '|even?| nil '|integers|)
(mk-name '|odd?| nil '|integers|)
(mk-name '|cons| nil '|list_adt|)
(mk-name '|car| nil '|list_adt|)
(mk-name '|cdr| nil '|list_adt|)
(mk-name '|cons?| nil '|list_adt|)
(mk-name '|null| nil '|list_adt|)
(mk-name '|null?| nil '|list_adt|)
(mk-name '|restrict| nil '|restrict|)
(mk-name '|length| nil '|list_props|)
(mk-name '|member| nil '|list_props|)
(mk-name '|nth| nil '|list_props|)
(mk-name '|append| nil '|list_props|)
(mk-name '|reverse| nil '|list_props|)
))
(defun same-primitive? (n i)
(and (same-id n i)
(module-instance n)
(eq (mod-id i)
(id (module-instance n)))))
(defmethod pvs2cl-primitive? ((expr name-expr))
(member expr *pvs2cl-primitives*
:test #'same-primitive?))
(defmethod pvs2cl-primitive? ((expr expr))
nil)
;
; This is sound as we've already gone through pvs2cl-primitve?
; by this point. However - should do it properly at some point
; as there could be overloading of the names of primitives (assuming
; different theory)
;
(defun pvs2cl-primitive (expr)
(cond ((eq (id expr) 'TRUE) t)
((eq (id expr) 'FALSE) nil)
((eq (id expr) '|null|) nil)
((and (eq (id expr) '-) ;;hard to distinguish unary,binary.
(tupletype? (domain (find-supertype (type expr)))))
(intern (format nil "pvs_--")))
(t (intern (format nil "pvs_~a" (id expr))))))
(defun pvs2cl-primitive2 (expr) ;;assuming expr is an id
(let* ((id (id expr))
(modinst (module-instance expr))
(acts (when modinst (actuals modinst))))
(if (and (eq id '=)
(eq (id modinst) '|equalities|)
(tc-eq (type-value (car acts)) *number*))
'=
(intern (format nil "pvs__~a" id)))))
;;;
;;; this clearing is now done automatically by untypecheck
;;;
(defun my-unintern (name)
(when (and name (symbolp name)) (unintern name)))
(defmethod clear-dependent-theories ((theory module))
(clear-theory theory)
(loop for (th . nil) in (all-usings theory)
do (clear-theory th))
(loop for (inst . nil) in (assuming-instances theory)
do (clear-theory inst)))
(defmethod clear-dependent-theories (theory)
(let ((module (get-theory theory)))
(when module
(clear-dependent-theories module))))
(defmethod clear-theory ((theory module))
(loop for dec in (theory theory)
when (and (const-decl? dec)
(eval-info dec))
do (remove-eval-info dec)))
(defmethod clear-theory (theory)
(let ((module (get-theory theory)))
(when module
(clear-theory module))))
(defun write-defn (defn output)
(when defn
(cond (output
(format output "~%")
(write defn :level nil :length nil
:pretty t :stream output))
(t (terpri)(terpri) (ppr defn)))))
(defun write-decl-defns (dec output)
(write-defn (definition (in-defn dec)) output)
(write-defn (definition (in-defn-m dec)) output)
(write-defn (definition (in-defn-d dec)) output)
(write-defn (definition (ex-defn dec)) output)
(write-defn (definition (ex-defn-m dec)) output)
(write-defn (definition (ex-defn-d dec)) output))
(defun write-decl-symbol-table (dec output)
(when (and (definition (in-defn dec))
(not (eq (id dec) (name (in-defn dec)))))
(format output "~%;;; ~a - ~a" (id dec) (name (in-defn dec))))
(when (and (definition (in-defn-m dec))
(not (eq (makesym "_~a" (id dec)) (name (in-defn-m dec)))))
(format output "~%;;; ~a - ~a" (id dec) (name (in-defn-m dec))))
(when (and (definition (in-defn-d dec))
(not (eq (makesym "~a!" (id dec)) (name (in-defn-d dec)))))
(format output "~%;;; ~a - ~a" (id dec) (name (in-defn-d dec))))
(when (and (definition (ex-defn dec))
(not (eq (id dec) (name (ex-defn dec)))))
(break "ex")
(format output "~%;;; ~a - ~a" (id dec) (name (ex-defn dec))))
(when (and (definition (ex-defn-m dec))
(not (eq (id dec) (name (ex-defn-m dec)))))
(break "ex-m")
(format output "~%;;; ~a - ~a" (id dec) (name (ex-defn-m dec))))
(when (and (definition (ex-defn-d dec))
(not (eq (id dec) (name (ex-defn-d dec)))))
(break "ex-d")
(format output "~%;;; ~a - ~a" (id dec) (name (ex-defn-d dec)))))
(defun print-lisp-defns (theory &optional file-string supersede?)
(if file-string
(with-open-file (output file-string :direction :output
:if-exists
(if supersede? :supersede :append)
:if-does-not-exist :create)
(when supersede? (format output "(in-package :pvs)~%"))
(print-lisp-defns-to-output (get-theory theory) output))
(print-lisp-defns-to-output (get-theory theory) nil)))
(defun print-lisp-defns-to-output (theory output)
(cond ((datatype? theory)
(print-lisp-defns-to-output (adt-theory theory) output)
(when (adt-map-theory theory)
(print-lisp-defns-to-output (adt-map-theory theory) output))
(when (adt-reduce-theory theory)
(print-lisp-defns-to-output (adt-reduce-theory theory) output)))
(t (loop for dec in (theory (get-theory theory))
when (and (const-decl? dec)(eval-info dec))
do (write-decl-defns dec output)))))
(defun pvs2cl-lisp-type (type)
(pvs2cl-lisp-type* type))
(defmethod pvs2cl-lisp-type* ((type funtype))
nil)
(defmethod pvs2cl-lisp-type* ((type tupletype))
'(simple-array t))
(defmethod pvs2cl-lisp-type* ((type cotupletype))
nil)
(defmethod pvs2cl-lisp-type* ((type recordtype))
(if (string-type? type)
'string
'(simple-array t)))
(defun subrange-index (type)
(let ((below (simple-below? type)))
(if below
(list 0 (if (number-expr? below)
(1- (number below))
'*))
(let ((upto (simple-upto? type)))
--> --------------------
--> maximum size reached
--> --------------------
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