3 ;; copyright (C) 2012, 2013 David Vazquez
4 ;; Copyright (C) 2012 Raimon Grau
6 ;; JSCL is free software: you can redistribute it and/or
7 ;; modify it under the terms of the GNU General Public License as
8 ;; published by the Free Software Foundation, either version 3 of the
9 ;; License, or (at your option) any later version.
11 ;; JSCL is distributed in the hope that it will be useful, but
12 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
13 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 ;; General Public License for more details.
16 ;; You should have received a copy of the GNU General Public License
17 ;; along with JSCL. If not, see <http://www.gnu.org/licenses/>.
21 (/debug "loading compiler.lisp!")
23 ;;; Translate the Lisp code to Javascript. It will compile the special
24 ;;; forms. Some primitive functions are compiled as special forms
25 ;;; too. The respective real functions are defined in the target (see
26 ;;; the beginning of this file) as well as some primitive functions.
28 (defun interleave (list element &optional after-last-p)
32 (dolist (x (cdr list))
38 (defun code (&rest args)
39 (mapconcat (lambda (arg)
42 ((integerp arg) (integer-to-string arg))
43 ((floatp arg) (float-to-string arg))
46 (with-output-to-string (*standard-output*)
50 ;;; Wrap X with a Javascript code to convert the result from
51 ;;; Javascript generalized booleans to T or NIL.
53 `(if ,x ,(ls-compile t) ,(ls-compile nil)))
55 ;;; Concatenate the arguments and wrap them with a self-calling
56 ;;; Javascript anonymous function. It is used to make some Javascript
57 ;;; statements valid expressions and provide a private scope as well.
58 ;;; It could be defined as function, but we could do some
59 ;;; preprocessing in the future.
60 (defmacro js!selfcall (&body body)
61 ``(call (function nil (code ,,@body))))
63 (defmacro js!selfcall* (&body body)
64 ``(call (function nil ,,@body)))
67 ;;; Like CODE, but prefix each line with four spaces. Two versions
68 ;;; of this function are available, because the Ecmalisp version is
69 ;;; very slow and bootstraping was annoying.
71 ;;; A Form can return a multiple values object calling VALUES, like
72 ;;; values(arg1, arg2, ...). It will work in any context, as well as
73 ;;; returning an individual object. However, if the special variable
74 ;;; `*multiple-value-p*' is NIL, is granted that only the primary
75 ;;; value will be used, so we can optimize to avoid the VALUES
77 (defvar *multiple-value-p* nil)
93 (defun lookup-in-lexenv (name lexenv namespace)
94 (find name (ecase namespace
95 (variable (lexenv-variable lexenv))
96 (function (lexenv-function lexenv))
97 (block (lexenv-block lexenv))
98 (gotag (lexenv-gotag lexenv)))
101 (defun push-to-lexenv (binding lexenv namespace)
103 (variable (push binding (lexenv-variable lexenv)))
104 (function (push binding (lexenv-function lexenv)))
105 (block (push binding (lexenv-block lexenv)))
106 (gotag (push binding (lexenv-gotag lexenv)))))
108 (defun extend-lexenv (bindings lexenv namespace)
109 (let ((env (copy-lexenv lexenv)))
110 (dolist (binding (reverse bindings) env)
111 (push-to-lexenv binding env namespace))))
114 (defvar *environment* (make-lexenv))
116 (defvar *variable-counter* 0)
118 (defun gvarname (symbol)
119 (declare (ignore symbol))
120 (incf *variable-counter*)
121 (concat "v" (integer-to-string *variable-counter*)))
123 (defun translate-variable (symbol)
124 (awhen (lookup-in-lexenv symbol *environment* 'variable)
127 (defun extend-local-env (args)
128 (let ((new (copy-lexenv *environment*)))
129 (dolist (symbol args new)
130 (let ((b (make-binding :name symbol :type 'variable :value (gvarname symbol))))
131 (push-to-lexenv b new 'variable)))))
133 ;;; Toplevel compilations
134 (defvar *toplevel-compilations* nil)
136 (defun toplevel-compilation (string)
137 (push string *toplevel-compilations*))
139 (defun get-toplevel-compilations ()
140 (reverse *toplevel-compilations*))
142 (defun %compile-defmacro (name lambda)
143 (toplevel-compilation (ls-compile `',name))
144 (let ((binding (make-binding :name name :type 'macro :value lambda)))
145 (push-to-lexenv binding *environment* 'function))
148 (defun global-binding (name type namespace)
149 (or (lookup-in-lexenv name *environment* namespace)
150 (let ((b (make-binding :name name :type type :value nil)))
151 (push-to-lexenv b *environment* namespace)
154 (defun claimp (symbol namespace claim)
155 (let ((b (lookup-in-lexenv symbol *environment* namespace)))
156 (and b (member claim (binding-declarations b)))))
158 (defun !proclaim (decl)
161 (dolist (name (cdr decl))
162 (let ((b (global-binding name 'variable 'variable)))
163 (push 'special (binding-declarations b)))))
165 (dolist (name (cdr decl))
166 (let ((b (global-binding name 'function 'function)))
167 (push 'notinline (binding-declarations b)))))
169 (dolist (name (cdr decl))
170 (let ((b (global-binding name 'variable 'variable)))
171 (push 'constant (binding-declarations b)))))))
174 (fset 'proclaim #'!proclaim)
176 (defun %define-symbol-macro (name expansion)
177 (let ((b (make-binding :name name :type 'macro :value expansion)))
178 (push-to-lexenv b *environment* 'variable)
182 (defmacro define-symbol-macro (name expansion)
183 `(%define-symbol-macro ',name ',expansion))
188 (defvar *compilations* nil)
190 (defmacro define-compilation (name args &body body)
191 ;; Creates a new primitive `name' with parameters args and
192 ;; @body. The body can access to the local environment through the
193 ;; variable *ENVIRONMENT*.
194 `(push (list ',name (lambda ,args (block ,name ,@body)))
197 (define-compilation if (condition true &optional false)
198 `(if (!== ,(ls-compile condition) ,(ls-compile nil))
199 ,(ls-compile true *multiple-value-p*)
200 ,(ls-compile false *multiple-value-p*)))
202 (defvar *ll-keywords* '(&optional &rest &key))
204 (defun list-until-keyword (list)
205 (if (or (null list) (member (car list) *ll-keywords*))
207 (cons (car list) (list-until-keyword (cdr list)))))
209 (defun ll-section (keyword ll)
210 (list-until-keyword (cdr (member keyword ll))))
212 (defun ll-required-arguments (ll)
213 (list-until-keyword ll))
215 (defun ll-optional-arguments-canonical (ll)
216 (mapcar #'ensure-list (ll-section '&optional ll)))
218 (defun ll-optional-arguments (ll)
219 (mapcar #'car (ll-optional-arguments-canonical ll)))
221 (defun ll-rest-argument (ll)
222 (let ((rest (ll-section '&rest ll)))
224 (error "Bad lambda-list `~S'." ll))
227 (defun ll-keyword-arguments-canonical (ll)
228 (flet ((canonicalize (keyarg)
229 ;; Build a canonical keyword argument descriptor, filling
230 ;; the optional fields. The result is a list of the form
231 ;; ((keyword-name var) init-form svar).
232 (let ((arg (ensure-list keyarg)))
233 (cons (if (listp (car arg))
235 (list (intern (symbol-name (car arg)) "KEYWORD") (car arg)))
237 (mapcar #'canonicalize (ll-section '&key ll))))
239 (defun ll-keyword-arguments (ll)
240 (mapcar (lambda (keyarg) (second (first keyarg)))
241 (ll-keyword-arguments-canonical ll)))
243 (defun ll-svars (lambda-list)
246 (ll-keyword-arguments-canonical lambda-list)
247 (ll-optional-arguments-canonical lambda-list))))
248 (remove nil (mapcar #'third args))))
250 (defun lambda-name/docstring-wrapper (name docstring code)
251 (if (or name docstring)
254 (when name `(= (get func "fname") ,name))
255 (when docstring `(= (get func "docstring") ,docstring))
259 (defun lambda-check-argument-count
260 (n-required-arguments n-optional-arguments rest-p)
261 ;; Note: Remember that we assume that the number of arguments of a
262 ;; call is at least 1 (the values argument).
263 (let ((min n-required-arguments)
264 (max (if rest-p 'n/a (+ n-required-arguments n-optional-arguments))))
266 ;; Special case: a positive exact number of arguments.
267 (when (and (< 0 min) (eql min max))
268 (return `(call |checkArgs| |nargs| ,min)))
271 ,(when (< 0 min) `(call |checkArgsAtLeast| |nargs| ,min))
272 ,(when (numberp max) `(call |checkArgsAtMost| |nargs| ,max))))))
274 (defun compile-lambda-optional (ll)
275 (let* ((optional-arguments (ll-optional-arguments-canonical ll))
276 (n-required-arguments (length (ll-required-arguments ll)))
277 (n-optional-arguments (length optional-arguments)))
278 (when optional-arguments
281 (dotimes (idx n-optional-arguments)
282 (let ((arg (nth idx optional-arguments)))
283 (collect `(,(+ idx n-required-arguments)
284 (= ,(make-symbol (translate-variable (car arg)))
285 ,(ls-compile (cadr arg)))
287 `(= ,(make-symbol (translate-variable (third arg)))
288 ,(ls-compile nil)))))))
289 (collect `(default (break))))))))
291 (defun compile-lambda-rest (ll)
292 (let ((n-required-arguments (length (ll-required-arguments ll)))
293 (n-optional-arguments (length (ll-optional-arguments ll)))
294 (rest-argument (ll-rest-argument ll)))
296 (let ((js!rest (make-symbol (translate-variable rest-argument))))
298 (var (,js!rest ,(ls-compile nil)))
300 (for ((= i (- |nargs| 1))
301 (>= i ,(+ n-required-arguments n-optional-arguments))
303 (= ,js!rest (object "car" (property |arguments| (+ i 2))
304 "cdr" ,js!rest))))))))
306 (defun compile-lambda-parse-keywords (ll)
307 (let ((n-required-arguments
308 (length (ll-required-arguments ll)))
309 (n-optional-arguments
310 (length (ll-optional-arguments ll)))
312 (ll-keyword-arguments-canonical ll)))
316 (dolist (keyword-argument keyword-arguments)
317 (destructuring-bind ((keyword-name var) &optional initform svar)
319 (declare (ignore keyword-name initform))
320 (collect `(var ,(make-symbol (translate-variable var))))
323 `(var (,(make-symbol (translate-variable svar))
324 ,(ls-compile nil))))))))
327 ,(flet ((parse-keyword (keyarg)
328 (destructuring-bind ((keyword-name var) &optional initform svar) keyarg
329 ;; ((keyword-name var) init-form svar)
331 (for ((= i ,(+ n-required-arguments n-optional-arguments))
335 (if (=== (property |arguments| (+ i 2))
336 ,(ls-compile keyword-name))
338 (= ,(make-symbol (translate-variable var))
339 (property |arguments| (+ i 3)))
340 ,(when svar `(= ,(make-symbol (translate-variable svar))
344 (= ,(make-symbol (translate-variable var))
345 ,(ls-compile initform)))))))
346 (when keyword-arguments
349 ,@(mapcar #'parse-keyword keyword-arguments))))
351 ;; Check for unknown keywords
352 ,(when keyword-arguments
354 (var (start ,(+ n-required-arguments n-optional-arguments)))
355 (if (== (% (- |nargs| start) 2) 1)
356 (throw "Odd number of keyword arguments."))
357 (for ((= i start) (< i |nargs|) (+= i 2))
358 (if (and ,@(mapcar (lambda (keyword-argument)
359 (destructuring-bind ((keyword-name var) &optional initform svar)
361 (declare (ignore var initform svar))
362 `(!== (property |arguments| (+ i 2)) ,(ls-compile keyword-name))))
364 (throw (+ "Unknown keyword argument "
367 (property |arguments| (+ i 2))
370 (defun parse-lambda-list (ll)
371 (values (ll-required-arguments ll)
372 (ll-optional-arguments ll)
373 (ll-keyword-arguments ll)
374 (ll-rest-argument ll)))
376 ;;; Process BODY for declarations and/or docstrings. Return as
377 ;;; multiple values the BODY without docstrings or declarations, the
378 ;;; list of declaration forms and the docstring.
379 (defun parse-body (body &key declarations docstring)
380 (let ((value-declarations)
382 ;; Parse declarations
384 (do* ((rest body (cdr rest))
385 (form (car rest) (car rest)))
386 ((or (atom form) (not (eq (car form) 'declare)))
388 (push form value-declarations)))
392 (not (null (cdr body))))
393 (setq value-docstring (car body))
394 (setq body (cdr body)))
395 (values body value-declarations value-docstring)))
397 ;;; Compile a lambda function with lambda list LL and body BODY. If
398 ;;; NAME is given, it should be a constant string and it will become
399 ;;; the name of the function. If BLOCK is non-NIL, a named block is
400 ;;; created around the body. NOTE: No block (even anonymous) is
401 ;;; created if BLOCk is NIL.
402 (defun compile-lambda (ll body &key name block)
403 (multiple-value-bind (required-arguments
407 (parse-lambda-list ll)
408 (multiple-value-bind (body decls documentation)
409 (parse-body body :declarations t :docstring t)
410 (declare (ignore decls))
411 (let ((n-required-arguments (length required-arguments))
412 (n-optional-arguments (length optional-arguments))
413 (*environment* (extend-local-env
414 (append (ensure-list rest-argument)
419 (lambda-name/docstring-wrapper name documentation
420 `(function (|values| |nargs| ,@(mapcar (lambda (x)
421 (make-symbol (translate-variable x)))
422 (append required-arguments optional-arguments)))
423 ;; Check number of arguments
424 ,(lambda-check-argument-count n-required-arguments
426 (or rest-argument keyword-arguments))
427 ,(compile-lambda-optional ll)
428 ,(compile-lambda-rest ll)
429 ,(compile-lambda-parse-keywords ll)
431 ,(let ((*multiple-value-p* t))
433 (ls-compile-block `((block ,block ,@body)) t)
434 (ls-compile-block body t)))))))))
437 (defun setq-pair (var val)
438 (let ((b (lookup-in-lexenv var *environment* 'variable)))
441 (eq (binding-type b) 'variable)
442 (not (member 'special (binding-declarations b)))
443 (not (member 'constant (binding-declarations b))))
444 ;; TODO: Unnecesary make-symbol when codegen migration is
446 `(= ,(make-symbol (binding-value b)) ,(ls-compile val)))
447 ((and b (eq (binding-type b) 'macro))
448 (ls-compile `(setf ,var ,val)))
450 (ls-compile `(set ',var ,val))))))
453 (define-compilation setq (&rest pairs)
456 (return-from setq (ls-compile nil)))
462 (error "Odd pairs in SETQ"))
464 (push `,(setq-pair (car pairs) (cadr pairs)) result)
465 (setq pairs (cddr pairs)))))
466 `(progn ,@(reverse result))))
469 ;;; Compilation of literals an object dumping
471 ;;; BOOTSTRAP MAGIC: We record the macro definitions as lists during
472 ;;; the bootstrap. Once everything is compiled, we want to dump the
473 ;;; whole global environment to the output file to reproduce it in the
474 ;;; run-time. However, the environment must contain expander functions
475 ;;; rather than lists. We do not know how to dump function objects
476 ;;; itself, so we mark the list definitions with this object and the
477 ;;; compiler will be called when this object has to be dumped.
478 ;;; Backquote/unquote does a similar magic, but this use is exclusive.
480 ;;; Indeed, perhaps to compile the object other macros need to be
481 ;;; evaluated. For this reason we define a valid macro-function for
483 (defvar *magic-unquote-marker* (gensym "MAGIC-UNQUOTE"))
485 (setf (macro-function *magic-unquote-marker*)
486 (lambda (form &optional environment)
487 (declare (ignore environment))
490 (defvar *literal-table* nil)
491 (defvar *literal-counter* 0)
494 (incf *literal-counter*)
495 (concat "l" (integer-to-string *literal-counter*)))
497 (defun dump-symbol (symbol)
499 (let ((package (symbol-package symbol)))
500 (if (eq package (find-package "KEYWORD"))
501 `(new (call |Symbol| ,(dump-string (symbol-name symbol)) ,(dump-string (package-name package))))
502 `(new (call |Symbol| ,(dump-string (symbol-name symbol))))))
504 (let ((package (symbol-package symbol)))
506 `(new (call |Symbol| ,(dump-string (symbol-name symbol))))
507 (ls-compile `(intern ,(symbol-name symbol) ,(package-name package))))))
509 (defun dump-cons (cons)
510 (let ((head (butlast cons))
513 ,@(mapcar (lambda (x) `(code ,(literal x t))) head)
514 (code ,(literal (car tail) t))
515 (code ,(literal (cdr tail) t)))))
517 (defun dump-array (array)
518 (let ((elements (vector-to-list array)))
519 (list-to-vector (mapcar (lambda (x) `(code ,(literal x)))
522 (defun dump-string (string)
523 `(call |make_lisp_string| ,string))
525 (defun literal (sexp &optional recursive)
527 ((integerp sexp) (integer-to-string sexp))
528 ((floatp sexp) (float-to-string sexp))
529 ((characterp sexp) (js-escape-string (string sexp)))
531 (or (cdr (assoc sexp *literal-table* :test #'eql))
532 (let ((dumped (typecase sexp
533 (symbol (dump-symbol sexp))
534 (string (dump-string sexp))
536 ;; BOOTSTRAP MAGIC: See the root file
537 ;; jscl.lisp and the function
538 ;; `dump-global-environment' for futher
540 (if (eq (car sexp) *magic-unquote-marker*)
541 (ls-compile (second sexp))
543 (array (dump-array sexp)))))
544 (if (and recursive (not (symbolp sexp)))
546 (let ((jsvar (genlit)))
547 (push (cons sexp jsvar) *literal-table*)
548 (toplevel-compilation `(code "var " ,jsvar " = " ,dumped))
549 (when (keywordp sexp)
550 (toplevel-compilation `(code ,jsvar ".value = " ,jsvar)))
554 (define-compilation quote (sexp)
557 (define-compilation %while (pred &rest body)
559 `(while (!== ,(ls-compile pred) ,(ls-compile nil))
561 ; braces. Unnecesary when code
563 ,(ls-compile-block body))
564 `(return ,(ls-compile nil))))
566 (define-compilation function (x)
568 ((and (listp x) (eq (car x) 'lambda))
569 (compile-lambda (cadr x) (cddr x)))
570 ((and (listp x) (eq (car x) 'named-lambda))
571 (destructuring-bind (name ll &rest body) (cdr x)
572 (compile-lambda ll body
573 :name (symbol-name name)
576 (let ((b (lookup-in-lexenv x *environment* 'function)))
579 (ls-compile `(symbol-function ',x)))))))
582 (defun make-function-binding (fname)
583 (make-binding :name fname :type 'function :value (gvarname fname)))
585 (defun compile-function-definition (list)
586 (compile-lambda (car list) (cdr list)))
588 (defun translate-function (name)
589 (let ((b (lookup-in-lexenv name *environment* 'function)))
590 (and b (binding-value b))))
592 (define-compilation flet (definitions &rest body)
593 (let* ((fnames (mapcar #'car definitions))
594 (cfuncs (mapcar (lambda (def)
595 (compile-lambda (cadr def)
600 (extend-lexenv (mapcar #'make-function-binding fnames)
603 `(call (function ,(mapcar #'make-symbol (mapcar #'translate-function fnames))
604 ,(ls-compile-block body t))
607 (define-compilation labels (definitions &rest body)
608 (let* ((fnames (mapcar #'car definitions))
610 (extend-lexenv (mapcar #'make-function-binding fnames)
615 ,@(mapcar (lambda (func)
616 `(var (,(make-symbol (translate-function (car func)))
617 ,(compile-lambda (cadr func)
618 `((block ,(car func) ,@(cddr func)))))))
620 (ls-compile-block body t))))
623 (defvar *compiling-file* nil)
624 (define-compilation eval-when-compile (&rest body)
627 (eval (cons 'progn body))
629 (ls-compile `(progn ,@body))))
631 (defmacro define-transformation (name args form)
632 `(define-compilation ,name ,args
635 (define-compilation progn (&rest body)
636 (if (null (cdr body))
637 (ls-compile (car body) *multiple-value-p*)
639 ,@(append (mapcar #'ls-compile (butlast body))
640 (list (ls-compile (car (last body)) t))))))
642 (define-compilation macrolet (definitions &rest body)
643 (let ((*environment* (copy-lexenv *environment*)))
644 (dolist (def definitions)
645 (destructuring-bind (name lambda-list &body body) def
646 (let ((binding (make-binding :name name :type 'macro :value
647 (let ((g!form (gensym)))
649 (destructuring-bind ,lambda-list ,g!form
651 (push-to-lexenv binding *environment* 'function))))
652 (ls-compile `(progn ,@body) *multiple-value-p*)))
655 (defun special-variable-p (x)
656 (and (claimp x 'variable 'special) t))
658 ;;; Wrap CODE to restore the symbol values of the dynamic
659 ;;; bindings. BINDINGS is a list of pairs of the form
660 ;;; (SYMBOL . PLACE), where PLACE is a Javascript variable
661 ;;; name to initialize the symbol value and where to stored
663 (defun let-binding-wrapper (bindings body)
664 (when (null bindings)
665 (return-from let-binding-wrapper body))
670 (let ((s (ls-compile `',(car b))))
671 (collect `(= tmp (get ,s "value")))
672 (collect `(= (get ,s "value") ,(cdr b)))
673 (collect `(= ,(cdr b) tmp)))))
678 (let ((s (ls-compile `(quote ,(car b)))))
679 (collect `(= (get ,s "value") ,(cdr b)))))))))
681 (define-compilation let (bindings &rest body)
682 (let* ((bindings (mapcar #'ensure-list bindings))
683 (variables (mapcar #'first bindings))
684 (cvalues (mapcar #'ls-compile (mapcar #'second bindings)))
685 (*environment* (extend-local-env (remove-if #'special-variable-p variables)))
687 `(call (function ,(mapcar (lambda (x)
688 (if (special-variable-p x)
689 (let ((v (gvarname x)))
690 (push (cons x (make-symbol v)) dynamic-bindings)
692 (make-symbol (translate-variable x))))
694 ,(let ((body (ls-compile-block body t t)))
695 `,(let-binding-wrapper dynamic-bindings body)))
699 ;;; Return the code to initialize BINDING, and push it extending the
700 ;;; current lexical environment if the variable is not special.
701 (defun let*-initialize-value (binding)
702 (let ((var (first binding))
703 (value (second binding)))
704 (if (special-variable-p var)
705 `(code ,(ls-compile `(setq ,var ,value)) ";" )
706 (let* ((v (gvarname var))
707 (b (make-binding :name var :type 'variable :value v)))
708 (prog1 `(code "var " ,v " = " ,(ls-compile value) ";" )
709 (push-to-lexenv b *environment* 'variable))))))
711 ;;; Wrap BODY to restore the symbol values of SYMBOLS after body. It
712 ;;; DOES NOT generate code to initialize the value of the symbols,
713 ;;; unlike let-binding-wrapper.
714 (defun let*-binding-wrapper (symbols body)
716 (return-from let*-binding-wrapper body))
717 (let ((store (mapcar (lambda (s) (cons s (gvarname s)))
718 (remove-if-not #'special-variable-p symbols))))
722 ,@(mapcar (lambda (b)
723 (let ((s (ls-compile `(quote ,(car b)))))
724 `(code "var " ,(cdr b) " = " ,s ".value;" )))
730 ,@(mapcar (lambda (b)
731 (let ((s (ls-compile `(quote ,(car b)))))
732 `(code ,s ".value" " = " ,(cdr b) ";" )))
736 (define-compilation let* (bindings &rest body)
737 (let ((bindings (mapcar #'ensure-list bindings))
738 (*environment* (copy-lexenv *environment*)))
740 (let ((specials (remove-if-not #'special-variable-p (mapcar #'first bindings)))
741 (body `(code ,@(mapcar #'let*-initialize-value bindings)
742 ,(ls-compile-block body t t))))
743 (let*-binding-wrapper specials body)))))
746 (define-compilation block (name &rest body)
747 ;; We use Javascript exceptions to implement non local control
748 ;; transfer. Exceptions has dynamic scoping, so we use a uniquely
749 ;; generated object to identify the block. The instance of a empty
750 ;; array is used to distinguish between nested dynamic Javascript
751 ;; exceptions. See https://github.com/davazp/jscl/issues/64 for
753 (let* ((idvar (gvarname name))
754 (b (make-binding :name name :type 'block :value idvar)))
755 (when *multiple-value-p*
756 (push 'multiple-value (binding-declarations b)))
757 (let* ((*environment* (extend-lexenv (list b) *environment* 'block))
758 (cbody (ls-compile-block body t)))
759 (if (member 'used (binding-declarations b))
762 "var " idvar " = [];"
766 " if (cf.type == 'block' && cf.id == " idvar ")"
767 (if *multiple-value-p*
768 " return values.apply(this, forcemv(cf.values));"
769 " return cf.values;")
774 (js!selfcall cbody)))))
776 (define-compilation return-from (name &optional value)
777 (let* ((b (lookup-in-lexenv name *environment* 'block))
778 (multiple-value-p (member 'multiple-value (binding-declarations b))))
780 (error "Return from unknown block `~S'." (symbol-name name)))
781 (push 'used (binding-declarations b))
782 ;; The binding value is the name of a variable, whose value is the
783 ;; unique identifier of the block as exception. We can't use the
784 ;; variable name itself, because it could not to be unique, so we
785 ;; capture it in a closure.
787 (when multiple-value-p `(code "var values = mv;" ))
790 "id: " (binding-value b) ", "
791 "values: " (ls-compile value multiple-value-p) ", "
792 "message: 'Return from unknown block " (symbol-name name) ".'"
795 (define-compilation catch (id &rest body)
797 `(var (|id| ,(ls-compile id)))
799 ,(ls-compile-block body t))
801 (if (and (== (get |cf| "type") "catch")
802 (== (get |cf| "id") |id|))
803 ,(if *multiple-value-p*
804 `(return (call (get |values| "apply")
806 (call |forcemv| (get |cf| "values"))))
807 `(return (call (get |pv| "apply")
809 (call |forcemv| (get |cf| "values")))))
812 (define-compilation throw (id value)
814 `(var (|values| |mv|))
817 |id| ,(ls-compile id)
818 |values| ,(ls-compile value t)
819 |message| "Throw uncatched."))))
822 (or (integerp x) (symbolp x)))
824 (defun declare-tagbody-tags (tbidx body)
825 (let* ((go-tag-counter 0)
827 (mapcar (lambda (label)
828 (let ((tagidx (integer-to-string (incf go-tag-counter))))
829 (make-binding :name label :type 'gotag :value (list tbidx tagidx))))
830 (remove-if-not #'go-tag-p body))))
831 (extend-lexenv bindings *environment* 'gotag)))
833 (define-compilation tagbody (&rest body)
834 ;; Ignore the tagbody if it does not contain any go-tag. We do this
835 ;; because 1) it is easy and 2) many built-in forms expand to a
836 ;; implicit tagbody, so we save some space.
837 (unless (some #'go-tag-p body)
838 (return-from tagbody (ls-compile `(progn ,@body nil))))
839 ;; The translation assumes the first form in BODY is a label
840 (unless (go-tag-p (car body))
841 (push (gensym "START") body))
842 ;; Tagbody compilation
843 (let ((branch (gvarname 'branch))
844 (tbidx (gvarname 'tbidx)))
845 (let ((*environment* (declare-tagbody-tags tbidx body))
847 (let ((b (lookup-in-lexenv (first body) *environment* 'gotag)))
848 (setq initag (second (binding-value b))))
850 ;; TAGBODY branch to take
851 "var " branch " = " initag ";"
852 "var " tbidx " = [];"
856 ,(let ((content nil))
857 `(code "switch(" ,branch "){"
859 ,@(dolist (form (cdr body) (reverse content))
860 (push (if (not (go-tag-p form))
861 `(code ,(ls-compile form) ";" )
862 (let ((b (lookup-in-lexenv form *environment* 'gotag)))
863 `(code "case " ,(second (binding-value b)) ":" )))
870 " if (jump.type == 'tagbody' && jump.id == " ,tbidx ")"
871 " " ,branch " = jump.label;"
876 "return " (ls-compile nil) ";" ))))
878 (define-compilation go (label)
879 (let ((b (lookup-in-lexenv label *environment* 'gotag))
881 ((symbolp label) (symbol-name label))
882 ((integerp label) (integer-to-string label)))))
884 (error "Unknown tag `~S'" label))
888 "id: " (first (binding-value b)) ", "
889 "label: " (second (binding-value b)) ", "
890 "message: 'Attempt to GO to non-existing tag " n "'"
893 (define-compilation unwind-protect (form &rest clean-up)
895 `(var (|ret| ,(ls-compile nil)))
897 (= |ret| ,(ls-compile form)))
899 ,(ls-compile-block clean-up))
902 (define-compilation multiple-value-call (func-form &rest forms)
904 "var func = " (ls-compile func-form) ";"
905 "var args = [" (if *multiple-value-p* "values" "pv") ", 0];"
911 ,@(mapcar (lambda (form)
912 `(code "vs = " ,(ls-compile form t) ";"
913 "if (typeof vs === 'object' && 'multiple-value' in vs)"
914 (code " args = args.concat(vs);" )
916 (code "args.push(vs);" )))
918 "args[1] = args.length-2;"
919 "return func.apply(window, args);" ) ";" ))
921 (define-compilation multiple-value-prog1 (first-form &rest forms)
923 "var args = " (ls-compile first-form *multiple-value-p*) ";"
924 (ls-compile-block forms)
927 (define-transformation backquote (form)
928 (bq-completely-process form))
933 (defvar *builtins* nil)
935 (defmacro define-raw-builtin (name args &body body)
936 ;; Creates a new primitive function `name' with parameters args and
937 ;; @body. The body can access to the local environment through the
938 ;; variable *ENVIRONMENT*.
939 `(push (list ',name (lambda ,args (block ,name ,@body)))
942 (defmacro define-builtin (name args &body body)
943 `(define-raw-builtin ,name ,args
944 (let ,(mapcar (lambda (arg) `(,arg (ls-compile ,arg))) args)
947 ;;; DECLS is a list of (JSVARNAME TYPE LISPFORM) declarations.
948 (defmacro type-check (decls &body body)
950 ,@(mapcar (lambda (decl)
951 `(let ((name ,(first decl))
952 (value ,(third decl)))
953 `(code "var " ,name " = " ,value ";" )))
955 ,@(mapcar (lambda (decl)
956 `(let ((name ,(first decl))
957 (type ,(second decl)))
958 `(code "if (typeof " ,name " != '" ,type "')"
959 (code "throw 'The value ' + "
961 " + ' is not a type "
966 `(code "return " ,,@body ";" )))
968 ;;; VARIABLE-ARITY compiles variable arity operations. ARGS stands for
969 ;;; a variable which holds a list of forms. It will compile them and
970 ;;; store the result in some Javascript variables. BODY is evaluated
971 ;;; with ARGS bound to the list of these variables to generate the
972 ;;; code which performs the transformation on these variables.
974 (defun variable-arity-call (args function)
976 (error "ARGS must be a non-empty list"))
982 ((or (floatp x) (numberp x)) (push x fargs))
983 (t (let ((v (make-symbol (code "x" (incf counter)))))
985 (push `(code "var " ,v " = " ,(ls-compile x) ";"
986 "if (typeof " ,v " !== 'number') throw 'Not a number!';")
989 `(code ,@(reverse prelude))
990 (funcall function (reverse fargs)))))
993 (defmacro variable-arity (args &body body)
994 (unless (symbolp args)
995 (error "`~S' is not a symbol." args))
996 `(variable-arity-call ,args
998 `(code "return " ,,@body ";" ))))
1000 (defun num-op-num (x op y)
1001 (type-check (("x" "number" x) ("y" "number" y))
1002 `(code "x" ,op "y")))
1004 (define-raw-builtin + (&rest numbers)
1007 (variable-arity numbers
1010 (define-raw-builtin - (x &rest others)
1011 (let ((args (cons x others)))
1012 (variable-arity args `(- ,@args))))
1014 (define-raw-builtin * (&rest numbers)
1017 (variable-arity numbers `(* ,@numbers))))
1019 (define-raw-builtin / (x &rest others)
1020 (let ((args (cons x others)))
1021 (variable-arity args
1024 (reduce (lambda (x y) `(/ ,x ,y))
1027 (define-builtin mod (x y) (num-op-num x "%" y))
1030 (defun comparison-conjuntion (vars op)
1035 `(,op ,(car vars) ,(cadr vars)))
1037 `(and (,op ,(car vars) ,(cadr vars))
1038 ,(comparison-conjuntion (cdr vars) op)))))
1040 (defmacro define-builtin-comparison (op sym)
1041 `(define-raw-builtin ,op (x &rest args)
1042 (let ((args (cons x args)))
1043 (variable-arity args
1044 (js!bool (comparison-conjuntion args ',sym))))))
1046 (define-builtin-comparison > >)
1047 (define-builtin-comparison < <)
1048 (define-builtin-comparison >= >=)
1049 (define-builtin-comparison <= <=)
1050 (define-builtin-comparison = ==)
1051 (define-builtin-comparison /= !=)
1053 (define-builtin numberp (x)
1054 (js!bool `(== (typeof ,x) "number")))
1056 (define-builtin floor (x)
1057 (type-check (("x" "number" x))
1060 (define-builtin expt (x y)
1061 (type-check (("x" "number" x)
1065 (define-builtin float-to-string (x)
1066 (type-check (("x" "number" x))
1067 "make_lisp_string(x.toString())"))
1069 (define-builtin cons (x y)
1070 `(object "car" ,x "cdr" ,y))
1072 (define-builtin consp (x)
1076 "return (typeof tmp == 'object' && 'car' in tmp);" )))
1078 (define-builtin car (x)
1081 `(return (if (=== tmp ,(ls-compile nil))
1085 (define-builtin cdr (x)
1088 `(return (if (=== tmp ,(ls-compile nil))
1092 (define-builtin rplaca (x new)
1093 (type-check (("x" "object" x))
1094 `(code "(x.car = " ,new ", x)")))
1096 (define-builtin rplacd (x new)
1097 (type-check (("x" "object" x))
1098 `(code "(x.cdr = " ,new ", x)")))
1100 (define-builtin symbolp (x)
1101 (js!bool `(instanceof ,x |Symbol|)))
1103 (define-builtin make-symbol (name)
1104 `(new (call |Symbol| ,name)))
1106 (define-builtin symbol-name (x)
1109 (define-builtin set (symbol value)
1110 `(= (get ,symbol "value") ,value))
1112 (define-builtin fset (symbol value)
1113 `(= (get ,symbol "fvalue") ,value))
1115 (define-builtin boundp (x)
1116 (js!bool `(!== (get ,x "value") undefined)))
1118 (define-builtin fboundp (x)
1119 (js!bool `(!== (get ,x "fvalue") undefined)))
1121 (define-builtin symbol-value (x)
1124 (value (get symbol "value")))
1125 `(if (=== value undefined)
1126 (throw (+ "Variable `" (call |xstring| (get symbol "name")) "' is unbound.")))
1129 (define-builtin symbol-function (x)
1132 (func (get symbol "fvalue")))
1133 `(if (=== func undefined)
1134 (throw (+ "Function `" (call |xstring| (get symbol "name")) "' is undefined.")))
1137 (define-builtin symbol-plist (x)
1138 `(or (get ,x "plist") ,(ls-compile nil)))
1140 (define-builtin lambda-code (x)
1141 `(call |make_lisp_string| (call (get ,x "toString"))))
1143 (define-builtin eq (x y)
1144 (js!bool `(=== ,x ,y)))
1146 (define-builtin char-code (x)
1147 (type-check (("x" "string" x))
1148 "char_to_codepoint(x)"))
1150 (define-builtin code-char (x)
1151 (type-check (("x" "number" x))
1152 "char_from_codepoint(x)"))
1154 (define-builtin characterp (x)
1158 `(return (and (== (typeof x) "string")
1159 (or (== (get x "length") 1)
1160 (== (get x "length") 2)))))))
1162 (define-builtin char-upcase (x)
1163 `(call |safe_char_upcase| ,x))
1165 (define-builtin char-downcase (x)
1166 `(call |safe_char_downcase| ,x))
1168 (define-builtin stringp (x)
1172 `(return (and (and (===(typeof x) "object")
1174 (== (get x "stringp") 1))))))
1176 (define-raw-builtin funcall (func &rest args)
1178 `(var (f ,(ls-compile func)))
1179 `(return (call (if (=== (typeof f) "function")
1182 ,@(list* (if *multiple-value-p* '|values| '|pv|)
1184 (mapcar #'ls-compile args))))))
1186 (define-raw-builtin apply (func &rest args)
1188 `(code "(" ,(ls-compile func) ")()")
1189 (let ((args (butlast args))
1190 (last (car (last args))))
1192 "var f = " (ls-compile func) ";"
1193 "var args = [" `(code
1194 ,@(interleave (list* (if *multiple-value-p* "values" "pv")
1195 (integer-to-string (length args))
1196 (mapcar #'ls-compile args))
1199 "var tail = (" (ls-compile last) ");"
1200 "while (tail != " (ls-compile nil) "){"
1201 " args.push(tail.car);"
1205 "return (typeof f === 'function'? f : f.fvalue).apply(this, args);" ))))
1207 (define-builtin js-eval (string)
1208 (if *multiple-value-p*
1210 `(var (v (call |globalEval| (call |xstring| ,string))))
1211 `(return (call (get |values| "apply") this (call |forcemv| v))))
1212 `(call |globalEval| (call |xstring| ,string))))
1214 (define-builtin %throw (string)
1215 (js!selfcall* `(throw ,string)))
1217 (define-builtin functionp (x)
1218 (js!bool `(=== (typeof ,x) "function")))
1220 (define-builtin %write-string (x)
1221 `(call (get |lisp| "write") ,x))
1223 (define-builtin /debug (x)
1224 `(call (get |console| "log") (call |xstring| ,x)))
1227 ;;; Storage vectors. They are used to implement arrays and (in the
1228 ;;; future) structures.
1230 (define-builtin storage-vector-p (x)
1234 `(return (and (=== (typeof x) "object") (in "length" x))))))
1236 (define-builtin make-storage-vector (n)
1239 `(= (get r "length") ,n)
1242 (define-builtin storage-vector-size (x)
1245 (define-builtin resize-storage-vector (vector new-size)
1246 `(= (get ,vector "length") ,new-size))
1248 (define-builtin storage-vector-ref (vector n)
1250 `(var (x (property ,vector ,n)))
1251 `(if (=== x undefined) (throw "Out of range."))
1254 (define-builtin storage-vector-set (vector n value)
1258 `(if (or (< i 0) (>= i (get x "length")))
1259 (throw "Out of range."))
1260 `(return (= (property x i) ,value))))
1262 (define-builtin concatenate-storage-vector (sv1 sv2)
1265 `(var (r (call (get sv1 "concat") ,sv2)))
1266 `(= (get r "type") (get sv1 "type"))
1267 `(= (get r "stringp") (get sv1 "stringp"))
1270 (define-builtin get-internal-real-time ()
1271 `(call (get (new (call |Date|)) "getTime")))
1273 (define-builtin values-array (array)
1274 (if *multiple-value-p*
1275 `(call (get |values| "apply") this ,array)
1276 `(call (get |pv| "apply") this ,array)))
1278 (define-raw-builtin values (&rest args)
1279 (if *multiple-value-p*
1280 `(call |values| ,@(mapcar #'ls-compile args))
1281 `(call |pv| ,@(mapcar #'ls-compile args))))
1285 (define-builtin new ()
1288 (define-raw-builtin oget* (object key &rest keys)
1291 (var (tmp (property ,(ls-compile object) (call |xstring| ,(ls-compile key)))))
1292 ,@(mapcar (lambda (key)
1294 (if (=== tmp undefined) (return ,(ls-compile nil)))
1295 (= tmp (property tmp (call |xstring| ,(ls-compile key))))))
1297 `(return (if (=== tmp undefined) ,(ls-compile nil) tmp))))
1299 (define-raw-builtin oset* (value object key &rest keys)
1300 (let ((keys (cons key keys)))
1303 (var (obj ,(ls-compile object)))
1304 ,@(mapcar (lambda (key)
1306 (= obj (property obj (call |xstring| ,(ls-compile key))))
1307 (if (=== object undefined)
1308 (throw "Impossible to set object property."))))
1311 (= (property obj (call |xstring| ,(ls-compile (car (last keys)))))
1312 ,(ls-compile value))))
1313 (return (if (=== tmp undefined)
1317 (define-raw-builtin oget (object key &rest keys)
1318 `(call |js_to_lisp| ,(ls-compile `(oget* ,object ,key ,@keys))))
1320 (define-raw-builtin oset (value object key &rest keys)
1321 (ls-compile `(oset* (lisp-to-js ,value) ,object ,key ,@keys)))
1323 (define-builtin objectp (x)
1324 (js!bool `(=== (typeof ,x) "object")))
1326 (define-builtin lisp-to-js (x) `(call |lisp_to_js| ,x))
1327 (define-builtin js-to-lisp (x) `(call |js_to_lisp| ,x))
1330 (define-builtin in (key object)
1331 (js!bool `(in (call |xstring| ,key) ,object)))
1333 (define-builtin map-for-in (function object)
1336 (g (if (=== (typeof f) "function") f (get f "fvalue")))
1339 (call g ,(if *multiple-value-p* '|values| '|pv|) 1 (get o "key")))
1340 `(return ,(ls-compile nil))))
1342 (define-compilation %js-vref (var)
1343 `(call |js_to_lisp| ,(make-symbol var)))
1345 (define-compilation %js-vset (var val)
1346 `(= ,(make-symbol var) (call |lisp_to_js| ,(ls-compile val))))
1348 (define-setf-expander %js-vref (var)
1349 (let ((new-value (gensym)))
1350 (unless (stringp var)
1351 (error "`~S' is not a string." var))
1355 `(%js-vset ,var ,new-value)
1360 (defvar *macroexpander-cache*
1361 (make-hash-table :test #'eq))
1363 (defun !macro-function (symbol)
1364 (unless (symbolp symbol)
1365 (error "`~S' is not a symbol." symbol))
1366 (let ((b (lookup-in-lexenv symbol *environment* 'function)))
1367 (if (and b (eq (binding-type b) 'macro))
1368 (let ((expander (binding-value b)))
1371 ((gethash b *macroexpander-cache*)
1372 (setq expander (gethash b *macroexpander-cache*)))
1374 (let ((compiled (eval expander)))
1375 ;; The list representation are useful while
1376 ;; bootstrapping, as we can dump the definition of the
1377 ;; macros easily, but they are slow because we have to
1378 ;; evaluate them and compile them now and again. So, let
1379 ;; us replace the list representation version of the
1380 ;; function with the compiled one.
1382 #+jscl (setf (binding-value b) compiled)
1383 #-jscl (setf (gethash b *macroexpander-cache*) compiled)
1384 (setq expander compiled))))
1388 (defun !macroexpand-1 (form)
1391 (let ((b (lookup-in-lexenv form *environment* 'variable)))
1392 (if (and b (eq (binding-type b) 'macro))
1393 (values (binding-value b) t)
1394 (values form nil))))
1395 ((and (consp form) (symbolp (car form)))
1396 (let ((macrofun (!macro-function (car form))))
1398 (values (funcall macrofun (cdr form)) t)
1399 (values form nil))))
1401 (values form nil))))
1403 (defun compile-funcall (function args)
1404 (let* ((values-funcs (if *multiple-value-p* "values" "pv"))
1405 (arglist `(code "(" ,@(interleave (list* values-funcs
1406 (integer-to-string (length args))
1407 (mapcar #'ls-compile args))
1410 (unless (or (symbolp function)
1411 (and (consp function)
1412 (member (car function) '(lambda oget))))
1413 (error "Bad function designator `~S'" function))
1415 ((translate-function function)
1416 `(code ,(translate-function function) ,arglist))
1417 ((and (symbolp function)
1418 #+jscl (eq (symbol-package function) (find-package "COMMON-LISP"))
1420 `(code ,(ls-compile `',function) ".fvalue" ,arglist))
1421 #+jscl((symbolp function)
1422 `(code ,(ls-compile `#',function) ,arglist))
1423 ((and (consp function) (eq (car function) 'lambda))
1424 `(code ,(ls-compile `#',function) ,arglist))
1425 ((and (consp function) (eq (car function) 'oget))
1426 `(code ,(ls-compile function) ,arglist))
1428 (error "Bad function descriptor")))))
1430 (defun ls-compile-block (sexps &optional return-last-p decls-allowed-p)
1431 (multiple-value-bind (sexps decls)
1432 (parse-body sexps :declarations decls-allowed-p)
1433 (declare (ignore decls))
1435 `(code ,(ls-compile-block (butlast sexps) nil decls-allowed-p)
1436 "return " ,(ls-compile (car (last sexps)) *multiple-value-p*) ";")
1438 ,@(interleave (mapcar #'ls-compile sexps) ";
1442 (defun ls-compile* (sexp &optional multiple-value-p)
1443 (multiple-value-bind (sexp expandedp) (!macroexpand-1 sexp)
1445 (return-from ls-compile* (ls-compile sexp multiple-value-p)))
1446 ;; The expression has been macroexpanded. Now compile it!
1447 (let ((*multiple-value-p* multiple-value-p))
1450 (let ((b (lookup-in-lexenv sexp *environment* 'variable)))
1452 ((and b (not (member 'special (binding-declarations b))))
1454 ((or (keywordp sexp)
1455 (and b (member 'constant (binding-declarations b))))
1456 `(code ,(ls-compile `',sexp) ".value"))
1458 (ls-compile `(symbol-value ',sexp))))))
1459 ((or (integerp sexp) (floatp sexp) (characterp sexp) (stringp sexp) (arrayp sexp))
1462 (let ((name (car sexp))
1466 ((assoc name *compilations*)
1467 (let ((comp (second (assoc name *compilations*))))
1469 ;; Built-in functions
1470 ((and (assoc name *builtins*)
1471 (not (claimp name 'function 'notinline)))
1472 (let ((comp (second (assoc name *builtins*))))
1475 (compile-funcall name args)))))
1477 (error "How should I compile `~S'?" sexp))))))
1479 (defun ls-compile (sexp &optional multiple-value-p)
1480 `(code "(" ,(ls-compile* sexp multiple-value-p) ")"))
1483 (defvar *compile-print-toplevels* nil)
1485 (defun truncate-string (string &optional (width 60))
1486 (let ((n (or (position #\newline string)
1487 (min width (length string)))))
1488 (subseq string 0 n)))
1490 (defun convert-toplevel (sexp &optional multiple-value-p)
1491 (let ((*toplevel-compilations* nil))
1493 ;; Non-empty toplevel progn
1495 (eq (car sexp) 'progn)
1498 ,@(mapcar (lambda (s) (convert-toplevel s t))
1501 (when *compile-print-toplevels*
1502 (let ((form-string (prin1-to-string sexp)))
1503 (format t "Compiling ~a..." (truncate-string form-string))))
1504 (let ((code (ls-compile sexp multiple-value-p)))
1506 ,@(interleave (get-toplevel-compilations) ";
1509 `(code ,code ";"))))))))
1511 (defun ls-compile-toplevel (sexp &optional multiple-value-p)
1512 (with-output-to-string (*standard-output*)
1513 (js (convert-toplevel sexp multiple-value-p))))