;;;-*- Mode:LISP; Package:(WALKER LISP 1000); Base:10; Syntax:Common-lisp -*-
;;;
;;; *************************************************************************
;;; Copyright (c) 1985 Xerox Corporation. All rights reserved.
;;;
;;; Use and copying of this software and preparation of derivative works
;;; based upon this software are permitted. Any distribution of this
;;; software or derivative works must comply with all applicable United
;;; States export control laws.
;;;
;;; This software is made available AS IS, and Xerox Corporation makes no
;;; warranty about the software, its performance or its conformity to any
;;; specification.
;;;
;;; Any person obtaining a copy of this software is requested to send their
;;; name and post office or electronic mail address to:
;;; CommonLoops Coordinator
;;; Xerox Artifical Intelligence Systems
;;; 2400 Hanover St.
;;; Palo Alto, CA 94303
;;; (or send Arpanet mail to CommonLoops-Coordinator.pa@Xerox.arpa)
;;;
;;; Suggestions, comments and requests for improvements are also welcome.
;;; *************************************************************************
;;;
;;; A simple code walker, based IN PART on: (roll the credits)
;;; Larry Masinter's Masterscope
;;; Moon's Common Lisp code walker
;;; Gary Drescher's code walker
;;; Larry Masinter's simple code walker
;;; .
;;; .
;;; boy, thats fair (I hope).
;;;
;;; For now at least, this code walker really only does what PCL needs it to
;;; do. Maybe it will grow up someday.
;;;
(in-package 'walker)
(export '(define-walker-template
walk-form
variable-lexical-p
variable-special-p
))
;;; *walk-function* is the function being called on each sub-form as we walk.
;;; Normally it is supplied using the :walk-function keyword argument to
;;; walk-form, but it is OK to bind it around a call to walk-form-internal.
(defvar *walk-function*)
;;; *walk-form* is used by the IF template. When the first argument to the
;;; if template is a list it will be evaluated with *walk-form* bound to the
;;; form currently being walked.
(defvar *walk-form*)
;;; *declarations* is a list of the declarations currently in effect.
(defvar *declarations*)
;;; *lexical-variables* is a list of the variables bound in the current
;;; contour. In *lexical-variables* the cons whose car is the variable is
;;; meaningful in the sense that the cons whose car is the variable can be
;;; used to keep track of which contour the variable is bound in.
;;;
;;; Now isn't that just the cats pajamas.
;;;
(defvar *lexical-variables*)
;;; An environment of the kind that macroexpand-1 gets as its second
;;; argument. In fact, that is exactly where it comes from. This is kind of
;;; kludgy since Common Lisp is somewhat screwed up in this respect.
;;; Hopefully Common Lisp will fix this soon. For more info see:
;;; MAKE-LEXICAL-ENVIRONMENT
(defvar *environment*)
;;;
;;; With new contour is used to enter a new lexical binding contour which
;;; inherits from the exisiting one. I admit that using with-new-contour is
;;; often overkill. It would suffice for the the walker to rebind
;;; *lexical-variables* and *declarations* when walking LET and rebind
;;; *environment* and *declarations* when walking MACROLET etc.
;;; WITH-NEW-CONTOUR is much more convenient and just as correct.
;;;
(defmacro with-new-contour (&body body)
`(let ((*declarations* ()) ;If Common Lisp got an
;unspecial declaration
;this would need to be
;re-worked.
(*lexical-variables* *lexical-variables*)
(*environment* *environment*))
. ,body))
(defmacro note-lexical-binding (thing)
`(push ,thing *lexical-variables*))
(defmacro note-declaration (declaration)
`(push ,declaration *declarations*))
(defun variable-lexically-boundp (var)
(if (not (boundp '*walk-function*))
:unsure
(values (member var *lexical-variables* :test (function eq))
(variable-special-p var) 't)))
(defun variable-lexical-p (var)
(if (not (boundp '*walk-function*))
:unsure
(and (not (eq (variable-special-p var) 't))
(member var *lexical-variables* :test (function eq)))))
(defun variable-special-p (var)
(if (not (boundp '*walk-function*))
(or (variable-globally-special-p var) :unsure)
(or (dolist (decl *declarations*)
(and (eq (car decl) 'special)
(member var (cdr decl) :test #'eq)
(return t)))
(variable-globally-special-p var))))
;;;
;;; VARIABLE-GLOBALLY-SPECIAL-P is used to ask if a variable has been
;;; declared globally special. Any particular CommonLisp implementation
;;; should customize this function accordingly and send their customization
;;; back.
;;;
;;; The default version of variable-globally-special-p is probably pretty
;;; slow, so it uses *globally-special-variables* as a cache to remember
;;; variables that it has already figured out are globally special.
;;;
;;; This would need to be reworked if an unspecial declaration got added to
;;; Common Lisp.
;;;
;;; Common Lisp nit:
;;; variable-globally-special-p should be defined in Common Lisp.
;;;
#-(or Symbolics Lucid Xerox Excl KCL (and dec vax common) :CMU HP GCLisp TI
pyramid)
(defvar *globally-special-variables* ())
(defun variable-globally-special-p (symbol)
#+Symbolics (si:special-variable-p symbol)
#+Lucid (lucid::proclaimed-special-p symbol)
#+TI (get symbol 'special)
#+Xerox (il:variable-globally-special-p symbol)
#+(and dec vax common) (get symbol 'system::globally-special)
#+KCL (si:specialp symbol)
#+excl (get symbol 'excl::.globally-special.)
#+:CMU (or (get symbol 'lisp::globally-special)
(get symbol
'clc::globally-special-in-compiler))
#+HP (member (get symbol 'impl:vartype)
'(impl:fluid impl:global)
:test #'eq)
#+:GCLISP (gclisp::special-p symbol)
#+pyramid (or (get symbol 'lisp::globally-special)
(get symbol
'clc::globally-special-in-compiler))
#-(or Symbolics Lucid Xerox Excl KCL (and dec vax common) :CMU HP GCLisp TI
pyramid)
(or (not (null (member symbol *globally-special-variables* :test #'eq)))
(when (eval `(flet ((ref () ,symbol))
(let ((,symbol '#,(list nil)))
(and (boundp ',symbol) (eq ,symbol (ref))))))
(push symbol *globally-special-variables*)
t)))
;;
;;;;;; Handling of special forms (the infamous 24).
;;
;;;
;;; and I quote...
;;;
;;; The set of special forms is purposely kept very small because
;;; any program analyzing program (read code walker) must have
;;; special knowledge about every type of special form. Such a
;;; program needs no special knowledge about macros...
;;;
;;; So all we have to do here is a define a way to store and retrieve
;;; templates which describe how to walk the 24 special forms and we are all
;;; set...
;;;
;;; Well, its a nice concept, and I have to admit to being naive enough that
;;; I believed it for a while, but not everyone takes having only 24 special
;;; forms as seriously as might be nice. There are (at least) 3 ways to
;;; lose:
;;
;;; 1 - Implementation x implements a Common Lisp special form as a macro
;;; which expands into a special form which:
;;; - Is a common lisp special form (not likely)
;;; - Is not a common lisp special form (on the 3600 IF --> COND).
;;;
;;; * We can safe ourselves from this case (second subcase really) by
;;; checking to see if there is a template defined for something
;;; before we check to see if we we can macroexpand it.
;;;
;;; 2 - Implementation x implements a Common Lisp macro as a special form.
;;;
;;; * This is a screw, but not so bad, we save ourselves from it by
;;; defining extra templates for the macros which are *likely* to
;;; be implemented as special forms. (DO, DO* ...)
;;;
;;; 3 - Implementation x has a special form which is not on the list of
;;; Common Lisp special forms.
;;;
;;; * This is a bad sort of a screw and happens more than I would like
;;; to think, especially in the implementations which provide more
;;; than just Common Lisp (3600, Xerox etc.).
;;; The fix is not terribly staisfactory, but will have to do for
;;; now. There is a hook in get walker-template which can get a
;;; template from the implementation's own walker. That template
;;; has to be converted, and so it may be that the right way to do
;;; this would actually be for that implementation to provide an
;;; interface to its walker which looks like the interface to this
;;; walker.
;;;
(eval-when (compile load eval)
(defmacro get-walker-template-internal (x) ;Has to be inside eval-when because
`(get ,x 'walker-template)) ;Golden Common Lisp doesn't hack
;compile time definition of macros
;right for setf.
(defmacro define-walker-template (name template)
`(eval-when (load eval)
(setf (get-walker-template-internal ',name) ',template)))
)
(defun get-walker-template (x)
(cond ((symbolp x)
(or (get-walker-template-internal x)
(get-implementation-dependent-walker-template x)))
((and (listp x) (eq (car x) 'lambda))
'(lambda repeat (eval)))
((and (listp x) (eq (car x) 'lambda))
'(call repeat (eval)))))
(defun get-implementation-dependent-walker-template (x)
(declare (ignore x))
())
;;
;;;;;; The actual templates
;;
(define-walker-template BLOCK (NIL NIL REPEAT (EVAL)))
(define-walker-template CATCH (NIL EVAL REPEAT (EVAL)))
(define-walker-template COMPILER-LET walk-compiler-let)
(define-walker-template DECLARE walk-unexpected-declare)
(define-walker-template EVAL-WHEN (NIL QUOTE REPEAT (EVAL)))
(define-walker-template FLET walk-flet/labels)
(define-walker-template FUNCTION (NIL CALL))
(define-walker-template GO (NIL QUOTE))
(define-walker-template IF (NIL TEST RETURN RETURN))
(define-walker-template LABELS walk-flet/labels)
(define-walker-template LAMBDA walk-lambda)
(define-walker-template LET walk-let)
(define-walker-template LET* walk-let*)
(define-walker-template MACROLET walk-macrolet)
(define-walker-template MULTIPLE-VALUE-CALL (NIL EVAL REPEAT (EVAL)))
(define-walker-template MULTIPLE-VALUE-PROG1 (NIL RETURN REPEAT (EVAL)))
(define-walker-template MULTIPLE-VALUE-SETQ (NIL (REPEAT (SET)) EVAL))
(define-walker-template MULTIPLE-VALUE-BIND walk-multiple-value-bind)
(define-walker-template PROGN (NIL REPEAT (EVAL)))
(define-walker-template PROGV (NIL EVAL EVAL REPEAT (EVAL)))
(define-walker-template QUOTE (NIL QUOTE))
(define-walker-template RETURN-FROM (NIL QUOTE REPEAT (RETURN)))
(define-walker-template SETQ (NIL REPEAT (SET EVAL)))
(define-walker-template TAGBODY walk-tagbody)
(define-walker-template THE (NIL QUOTE EVAL))
(define-walker-template THROW (NIL EVAL EVAL))
(define-walker-template UNWIND-PROTECT (NIL RETURN REPEAT (EVAL)))
;;; The new special form.
;(define-walker-template pcl::LOAD-TIME-EVAL (NIL EVAL))
;;;
;;; And the extra templates...
;;;
(define-walker-template DO walk-do)
(define-walker-template DO* walk-do*)
(define-walker-template PROG walk-prog)
(define-walker-template PROG* walk-prog*)
(define-walker-template COND (NIL REPEAT ((TEST REPEAT (EVAL)))))
;;
;;;;;; WALK-FORM
;;
;;;
;;; The main entry-point is walk-form, calls back in should use walk-form-internal.
;;;
(defun walk-form (form &key ((:declarations *declarations*) ())
((:lexical-variables *lexical-variables*) ())
((:environment *environment*) ())
((:walk-function *walk-function*)
#'(lambda (x y) (declare (ignore y)) x)))
(walk-form-internal form 'eval))
;;;
;;; WALK-FORM-INTERNAL is the main driving function for the code walker. It
;;; takes a form and the current context and walks the form calling itself or
;;; the appropriate template recursively.
;;;
;;; "It is recommended that a program-analyzing-program process a form
;;; that is a list whose car is a symbol as follows:
;;;
;;; 1. If the program has particular knowledge about the symbol,
;;; process the form using special-purpose code. All of the
;;; standard special forms should fall into this category.
;;; 2. Otherwise, if macro-function is true of the symbol apply
;;; either macroexpand or macroexpand-1 and start over.
;;; 3. Otherwise, assume it is a function call. "
;;;
(defun walk-form-internal (form context
&aux newform newnewform
walk-no-more-p macrop
fn template)
;; First apply the *walk-function* to perform whatever translation
;; the user wants to to this form. If the second value returned
;; by *walk-function* is T then we don't recurse...
(multiple-value-setq (newform walk-no-more-p)
(funcall *walk-function* form context))
(cond (walk-no-more-p newform)
((not (eq form newform)) (walk-form-internal newform context))
((not (consp newform)) newform)
((setq template (get-walker-template (setq fn (car newform))))
(if (symbolp template)
(funcall template newform context)
(walk-template newform template context)))
((progn (multiple-value-setq (newnewform macrop)
(macroexpand-1 newform *environment*))
macrop)
(walk-form-internal newnewform context))
((and (symbolp fn)
(not (fboundp fn))
(special-form-p fn))
(error
"~S is a special form, not defined in the CommonLisp manual.~%~
This code walker doesn't know how to walk it. Please define a~%~
template for this special form and try again."
fn))
(t
;; Otherwise, walk the form as if its just a standard function
;; call using a template for standard function call.
(walk-template newform '(call repeat (eval)) context))))
(defun walk-template (form template context)
(if (atom template)
(ecase template
((QUOTE NIL) form)
((EVAL FUNCTION TEST EFFECT RETURN)
(walk-form-internal form :EVAL))
(SET
(walk-form-internal form :SET))
((LAMBDA CALL)
(if (symbolp form)
form
(walk-lambda form context))))
(case (car template)
(IF
(let ((*walk-form* form))
(walk-template form
(if (if (listp (cadr template))
(eval (cadr template))
(funcall (cadr template) form))
(caddr template)
(cadddr template))
context)))
(REPEAT
(walk-template-handle-repeat form
(cdr template)
;; For the case where nothing happens
;; after the repeat optimize out the
;; call to length.
(if (null (cddr template))
()
(nthcdr (- (length form)
(length
(cddr template)))
form))
context))
(REMOTE
(walk-template form (cadr template) context))
(otherwise
(cond ((atom form) form)
(t (recons form
(walk-template
(car form) (car template) context)
(walk-template
(cdr form) (cdr template) context))))))))
(defun walk-template-handle-repeat (form template stop-form context)
(if (eq form stop-form)
(walk-template form (cdr template) context)
(walk-template-handle-repeat-1 form
template
(car template)
stop-form
context)))
(defun walk-template-handle-repeat-1 (form template repeat-template
stop-form context)
(cond ((null form) ())
((eq form stop-form)
(if (null repeat-template)
(walk-template stop-form (cdr template) context)
(error "While handling repeat:
~%~Ran into stop while still in repeat template.")))
((null repeat-template)
(walk-template-handle-repeat-1
form template (car template) stop-form context))
(t
(recons form
(walk-template (car form) (car repeat-template) context)
(walk-template-handle-repeat-1 (cdr form)
template
(cdr repeat-template)
stop-form
context)))))
(defun recons (x car cdr)
(if (or (not (eq (car x) car))
(not (eq (cdr x) cdr)))
(cons car cdr)
x))
(defun relist* (x &rest args)
(relist*-internal x args))
(defun relist*-internal (x args)
(if (null (cdr args))
(car args)
(recons x (car args) (relist*-internal (cdr x) (cdr args)))))
;;
;;;;;; Special walkers
;;
(defun walk-declarations (body fn
&optional doc-string-p declarations old-body
&aux (form (car body)) macrop new-form)
(cond ((and (stringp form) ;might be a doc string
(cdr body) ;isn't the returned value
(null doc-string-p) ;no doc string yet
(null declarations)) ;no declarations yet
(recons body
form
(walk-declarations (cdr body) fn t)))
((and (listp form) (eq (car form) 'declare))
;; Got ourselves a real live declaration. Record it, look for more.
(dolist (declaration (cdr form))
(note-declaration declaration)
(push declaration declarations))
(recons body
form
(walk-declarations
(cdr body) fn doc-string-p declarations)))
((and form
(listp form)
(null (get-walker-template (car form)))
(progn
(multiple-value-setq (new-form macrop)
(macroexpand-1 (car form) *environment*))
macrop))
;; This form was a call to a macro. Maybe it expanded
;; into a declare? Recurse to find out.
(walk-declarations (recons body new-form (cdr body))
fn doc-string-p declarations
(or old-body body)))
(t
;; Now that we have walked and recorded the declarations,
;; call the function our caller provided to expand the body.
;; We call that function rather than passing the real-body
;; back, because we are RECONSING up the new body.
(funcall fn (or old-body body)))))
(defun walk-unexpected-declare (form context)
(declare (ignore context))
(warn "Encountered declare ~S in a place where a declare was not expected."
form)
form)
(defun walk-arglist (arglist context &optional (destructuringp nil) &aux arg)
(cond ((null arglist) ())
((symbolp (setq arg (car arglist)))
(or (member arg lambda-list-keywords :test #'eq)
(note-lexical-binding arg))
(recons arglist
arg
(walk-arglist (cdr arglist)
context
(and destructuringp
(not (member arg lambda-list-keywords
:test #'eq))))))
((consp arg)
(prog1 (if destructuringp
(walk-arglist arg context destructuringp)
(recons arglist
(relist* arg
(car arg)
(walk-form-internal (cadr arg) 'eval)
(cddr arg))
(walk-arglist (cdr arglist) context nil)))
(if (symbolp (car arg))
(note-lexical-binding (car arg))
(note-lexical-binding (cadar arg)))
(or (null (cddr arg))
(not (symbolp (caddr arg)))
(note-lexical-binding arg))))
(t
(error "Can't understand something in the arglist ~S" arglist))))
(defun walk-let (form context)
(walk-let/let* form context nil))
(defun walk-let* (form context)
(walk-let/let* form context t))
(defun walk-prog (form context)
(walk-let/let* form context nil))
(defun walk-prog* (form context)
(walk-let/let* form context t))
(defun walk-do (form context)
(walk-do/do* form context nil))
(defun walk-do* (form context)
(walk-do/do* form context t))
(defun walk-let/let* (form context sequentialp)
(let ((old-declarations *declarations*)
(old-lexical-variables *lexical-variables*))
(with-new-contour
(let* ((let/let* (car form))
(bindings (cadr form))
(body (cddr form))
walked-bindings
(walked-body
(walk-declarations
body
#'(lambda (real-body)
(setq walked-bindings
(walk-bindings-1 bindings
old-declarations
old-lexical-variables
context
sequentialp))
(walk-template real-body '(repeat (eval)) context)))))
(relist*
form let/let* walked-bindings walked-body)))))
(defun walk-do/do* (form context sequentialp)
(let ((old-declarations *declarations*)
(old-lexical-variables *lexical-variables*))
(with-new-contour
(let* ((do/do* (car form))
(bindings (cadr form))
(end-test (caddr form))
(body (cdddr form))
walked-bindings
(walked-body
(walk-declarations
body
#'(lambda (real-body)
(setq walked-bindings
(walk-bindings-1 bindings
old-declarations
old-lexical-variables
context
sequentialp))
(walk-template real-body '(repeat (eval)) context)))))
(relist* form
do/do*
(walk-bindings-2 bindings walked-bindings context)
(walk-template end-test '(test repeat (eval)) context)
walked-body)))))
(defun walk-multiple-value-bind (form context)
(let ((old-declarations *declarations*)
(old-lexical-variables *lexical-variables*))
(with-new-contour
(let* ((mvb (car form))
(bindings (cadr form))
(mv-form (walk-template (caddr form) 'eval context))
(body (cdddr form))
walked-bindings
(walked-body
(walk-declarations
body
#'(lambda (real-body)
(setq walked-bindings
(walk-bindings-1 bindings
old-declarations
old-lexical-variables
context
nil))
(walk-template real-body '(repeat (eval)) context)))))
(relist* form mvb walked-bindings mv-form walked-body)))))
(defun walk-bindings-1 (bindings old-declarations old-lexical-variables
context sequentialp)
(and bindings
(let ((binding (car bindings)))
(recons bindings
(if (symbolp binding)
(prog1 binding
(note-lexical-binding binding))
(prog1 (let ((*declarations* old-declarations)
(*lexical-variables*
(if sequentialp
*lexical-variables*
old-lexical-variables)))
(relist* binding
(car binding)
(walk-form-internal (cadr binding)
context)
(cddr binding))) ;save cddr for DO/DO*
;it is the next value
;form. Don't walk it
;now though.
(note-lexical-binding (car binding))))
(walk-bindings-1 (cdr bindings)
old-declarations old-lexical-variables
context sequentialp)))))
(defun walk-bindings-2 (bindings walked-bindings context)
(and bindings
(let ((binding (car bindings))
(walked-binding (car walked-bindings)))
(recons bindings
(if (symbolp binding)
binding
(relist* binding
(car walked-binding)
(cadr walked-binding)
(walk-template (cddr binding) '(eval) context)))
(walk-bindings-2 (cdr bindings)
(cdr walked-bindings)
context)))))
(defun walk-lambda (form context)
(with-new-contour
(let* ((arglist (cadr form))
(body (cddr form))
(walked-arglist nil)
(walked-body
(walk-declarations body
#'(lambda (real-body)
(setq walked-arglist (walk-arglist arglist context))
(walk-template real-body '(repeat (eval)) context)))))
(relist* form
(car form)
walked-arglist
walked-body))))
(defun walk-tagbody (form context)
(recons form (car form) (walk-tagbody-1 (cdr form) context)))
(defun walk-tagbody-1 (form context)
(and form
(recons form
(walk-form-internal (car form)
(if (symbolp (car form)) 'quote context))
(walk-tagbody-1 (cdr form) context))))
(defun walk-compiler-let (form context)
(with-new-contour
(let ((vars ())
(vals ()))
(dolist (binding (cadr form))
(cond ((symbolp binding) (push binding vars) (push nil vals))
(t
(push (car binding) vars)
(push (eval (cadr binding)) vals))))
(relist* form
(car form)
(cadr form)
(progv vars vals
(note-declaration (cons 'special vars))
(walk-template (cddr form) '(repeat (eval)) context))))))
(defun walk-macrolet (form context)
(labels ((walk-definitions (definitions)
(and (not (null definitions))
(let ((definition (car definitions)))
(recons definitions
(with-new-contour
(relist* definition
(car definition)
(walk-arglist (cadr definition)
context t)
(walk-declarations (cddr definition)
#'(lambda (real-body)
(walk-template
real-body
'(repeat (eval))
context)))))
(walk-definitions (cdr definitions)))))))
(with-new-contour
(relist* form
(car form)
(walk-definitions (cadr form))
(progn (setq *environment*
(make-lexical-environment form *environment*))
(walk-declarations (cddr form)
#'(lambda (real-body)
(walk-template real-body
'(repeat (eval))
context))))))))
(defun walk-flet/labels (form context)
(with-new-contour
(labels ((walk-definitions (definitions)
(if (null definitions)
()
(recons definitions
(walk-lambda (car definitions) context)
(walk-definitions (cdr definitions)))))
(update-environment ()
(setq *environment*
(make-lexical-environment form *environment*))))
(relist* form
(car form)
(ecase (car form)
(flet
(prog1 (walk-definitions (cadr form))
(update-environment)))
(labels
(update-environment)
(walk-definitions (cadr form))))
(walk-declarations (cddr form)
#'(lambda (real-body)
(walk-template real-body '(repeat (eval)) context)))))))
;;; make-lexical-environemnt is kind of gross. It would be less gross if
;;; EVAL took an environment argument.
;;;
;;; Common Lisp nit:
;;; if Common Lisp should provide mechanisms for playing with
;;; environments explicitly. making them, finding out what
;;; functions are bound in them etc. Maybe compile should
;;; take an environment argument too?
;;;
#-(or GCLisp)
(defun make-lexical-environment (macrolet/flet/labels-form environment)
(if (null (cadr macrolet/flet/labels-form))
environment
(evalhook (list (car macrolet/flet/labels-form)
(cadr macrolet/flet/labels-form)
() ;Fake out macroexpansion which
;may be looking for declares.
;Actually, this should be a
;no-op since declarations are
;not allowed to appear here,
;but...
(list 'make-lexical-environment-2))
'make-lexical-environment-1
()
environment)))
(defun make-lexical-environment-1 (form env)
(setq form (macroexpand form #-excl env
#+excl (cadr env)))
(evalhook form 'make-lexical-environment-1 nil env))
(defmacro make-lexical-environment-2 (&environment env)
(list 'quote (copy-tree env)))
#+GCLisp
(defun make-lexical-environment (mfl-form env)
(do ((new-entries nil)
(new-funcs (second mfl-form) (cdr new-funcs)))
((null new-funcs)
(if (eq :compiler-menv (car env))
`(:compiler-menv ,@new-entries ,@(cdr env))
(append new-entries env)))
(let ((lex-fn-entry
(ecase (car mfl-form)
((flet labels) (cons (caar new-funcs) nil))
(macrolet
(let* ((lisp::*defmacro-unrestricted-p* t)
(expander (cdr (lisp::defmac-trans
(cadr (car new-funcs))
(cddr (car new-funcs))))))
(declare (special lisp::*defmacro-unrestricted-p*))
(cons (caar new-funcs)
(if (eq :compiler-menv (car env))
`(,(gensym) ,expander)
`(MACRO . ,expander))))))))
(push lex-fn-entry new-entries))))
;;
;;;;;; Tests tests tests
;;
#|
(defmacro take-it-out-for-a-test-walk (form)
`(progn
(terpri)
(terpri)
(let ((copy-of-form (copy-tree ',form))
(result (walk-form ',form :walk-function
'(lambda (x y)
(format t "~&Form: ~S ~3T Context: ~A" x y)
(when (symbolp x)
(multiple-value-bind (lexical special)
(variable-lexically-boundp x)
(when lexical
(format t ";~3T")
(format t "lexically bound"))
(when special
(format t ";~3T")
(format t "declared special"))
(when (boundp x)
(format t ";~3T")
(format t "bound: ~S " (eval x)))))
x))))
(cond ((not (equal result copy-of-form))
(format t "~%Warning: Result not EQUAL to copy of start."))
((not (eq result ',form))
(format t "~%Warning: Result not EQ to copy of start.")))
(#+Symbolics zl:grind-top-level
#-Symbolics print
result)
result)))
(defun foo (&rest ignore) ())
(defmacro bar (x) `'(global-bar-expanded ,x))
(defun baz (&rest ignore) ())
(take-it-out-for-a-test-walk (foo arg1 arg2 arg3))
(take-it-out-for-a-test-walk (foo (baz 1 2) (baz 3 4 5)))
(take-it-out-for-a-test-walk (block block-name a b c))
(take-it-out-for-a-test-walk (block block-name (foo a) b c))
(take-it-out-for-a-test-walk (catch catch-tag (foo a) b c))
(take-it-out-for-a-test-walk (compiler-let ((a 1) (b 2)) (foo a) b))
(take-it-out-for-a-test-walk (prog () (declare (special a b))))
(take-it-out-for-a-test-walk (let (a b c)
(declare (special a b))
(foo a) b c))
(take-it-out-for-a-test-walk (let (a b c)
(declare (special a) (special b))
(foo a) b c))
(take-it-out-for-a-test-walk (let (a b c)
(declare (special a))
(declare (special b))
(foo a) b c))
(take-it-out-for-a-test-walk (let (a b c)
(declare (special a))
(declare (special b))
(let ((a 1))
(foo a) b c)))
(take-it-out-for-a-test-walk (eval-when ()
a
(foo a)))
(take-it-out-for-a-test-walk (eval-when (eval when load)
a
(foo a)))
(take-it-out-for-a-test-walk (multiple-value-bind (a b) (foo a b) (list a b)))
(take-it-out-for-a-test-walk (multiple-value-bind (a b)
(foo a b)
(declare (special a))
(list a b)))
(take-it-out-for-a-test-walk (progn (function foo)))
(take-it-out-for-a-test-walk (progn a b (go a)))
(take-it-out-for-a-test-walk (if a b c))
(take-it-out-for-a-test-walk (if a b))
(take-it-out-for-a-test-walk ((lambda (a b) (list a b)) 1 2))
(take-it-out-for-a-test-walk ((lambda (a b) (declare (special a)) (list a b))
1 2))
(take-it-out-for-a-test-walk (let ((a a) (b a) (c b)) (list a b c)))
(take-it-out-for-a-test-walk (let* ((a a) (b a) (c b)) (list a b c)))
(take-it-out-for-a-test-walk (let ((a a) (b a) (c b))
(declare (special a b))
(list a b c)))
(take-it-out-for-a-test-walk (let* ((a a) (b a) (c b))
(declare (special a b))
(list a b c)))
(take-it-out-for-a-test-walk (let ((a 1) (b 2))
(foo bar)
(declare (special a))
(foo a b)))
(take-it-out-for-a-test-walk (multiple-value-call #'foo a b c))
(take-it-out-for-a-test-walk (multiple-value-prog1 a b c))
(take-it-out-for-a-test-walk (progn a b c))
(take-it-out-for-a-test-walk (progv vars vals a b c))
(take-it-out-for-a-test-walk (quote a))
(take-it-out-for-a-test-walk (return-from block-name a b c))
(take-it-out-for-a-test-walk (setq a 1))
(take-it-out-for-a-test-walk (setq a (foo 1) b (bar 2) c 3))
(take-it-out-for-a-test-walk (tagbody a b c (go a)))
(take-it-out-for-a-test-walk (the foo (foo-form a b c)))
(take-it-out-for-a-test-walk (throw tag-form a))
(take-it-out-for-a-test-walk (unwind-protect (foo a b) d e f))
(take-it-out-for-a-test-walk (flet ((flet-1 (a b) (list a b)))
(flet-1 1 2)
(foo 1 2)))
(take-it-out-for-a-test-walk (labels ((label-1 (a b) (list a b)))
(label-1 1 2)
(foo 1 2)))
(take-it-out-for-a-test-walk (macrolet ((macrolet-1 (a b) (list a b)))
(macrolet-1 a b)
(foo 1 2)))
(take-it-out-for-a-test-walk (macrolet ((foo (a) `(inner-foo-expanded ,a)))
(foo 1)))
(take-it-out-for-a-test-walk (progn (bar 1)
(macrolet ((bar (a)
`(inner-bar-expanded ,a)))
(bar 1))))
(take-it-out-for-a-test-walk (progn (bar 1)
(macrolet ((bar (s)
(bar s)
`(inner-bar-expanded ,s)))
(bar 2))))
(take-it-out-for-a-test-walk (cond (a b)
((foo bar) a (foo a))))
(let ((the-lexical-variables ()))
(walk-form '(let ((a 1) (b 2))
#'(lambda (x) (list a b x y)))
:walk-function #'(lambda (form context)
(when (and (symbolp form)
(variable-lexical-p form))
(push form the-lexical-variables))
form))
(or (and (= (length the-lexical-variables) 3)
(member 'a the-lexical-variables)
(member 'b the-lexical-variables)
(member 'x the-lexical-variables))
(error "Walker didn't do lexical variables of a closure properly.")))
|#
()