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 `(case ,(+ idx n-required-arguments)))
284 (collect `(= ,(make-symbol (translate-variable (car arg)))
285 ,(ls-compile (cadr arg))))
286 (collect (when (third arg)
287 `(= ,(make-symbol (translate-variable (third arg)))
288 ,(ls-compile nil))))))
290 (collect '(break)))))))
292 (defun compile-lambda-rest (ll)
293 (let ((n-required-arguments (length (ll-required-arguments ll)))
294 (n-optional-arguments (length (ll-optional-arguments ll)))
295 (rest-argument (ll-rest-argument ll)))
297 (let ((js!rest (make-symbol (translate-variable rest-argument))))
299 (var (,js!rest ,(ls-compile nil)))
301 (for ((= i (- |nargs| 1))
302 (>= i ,(+ n-required-arguments n-optional-arguments))
304 (= ,js!rest (object "car" (property |arguments| (+ i 2))
305 "cdr" ,js!rest))))))))
307 (defun compile-lambda-parse-keywords (ll)
308 (let ((n-required-arguments
309 (length (ll-required-arguments ll)))
310 (n-optional-arguments
311 (length (ll-optional-arguments ll)))
313 (ll-keyword-arguments-canonical ll)))
317 (dolist (keyword-argument keyword-arguments)
318 (destructuring-bind ((keyword-name var) &optional initform svar)
320 (declare (ignore keyword-name initform))
321 (collect `(var ,(make-symbol (translate-variable var))))
324 `(var (,(make-symbol (translate-variable svar))
325 ,(ls-compile nil))))))))
328 ,(flet ((parse-keyword (keyarg)
329 (destructuring-bind ((keyword-name var) &optional initform svar) keyarg
330 ;; ((keyword-name var) init-form svar)
332 (for ((= i ,(+ n-required-arguments n-optional-arguments))
336 (if (=== (property |arguments| (+ i 2))
337 ,(ls-compile keyword-name))
339 (= ,(make-symbol (translate-variable var))
340 (property |arguments| (+ i 3)))
341 ,(when svar `(= ,(make-symbol (translate-variable svar))
345 (= ,(make-symbol (translate-variable var))
346 ,(ls-compile initform)))))))
347 (when keyword-arguments
350 ,@(mapcar #'parse-keyword keyword-arguments))))
352 ;; Check for unknown keywords
353 ,(when keyword-arguments
355 (var (start ,(+ n-required-arguments n-optional-arguments)))
356 (if (== (% (- |nargs| start) 2) 1)
357 (throw "Odd number of keyword arguments."))
358 (for ((= i start) (< i |nargs|) (+= i 2))
359 (if (and ,@(mapcar (lambda (keyword-argument)
360 (destructuring-bind ((keyword-name var) &optional initform svar)
362 (declare (ignore var initform svar))
363 `(!== (property |arguments| (+ i 2)) ,(ls-compile keyword-name))))
365 (throw (+ "Unknown keyword argument "
368 (property |arguments| (+ i 2))
371 (defun parse-lambda-list (ll)
372 (values (ll-required-arguments ll)
373 (ll-optional-arguments ll)
374 (ll-keyword-arguments ll)
375 (ll-rest-argument ll)))
377 ;;; Process BODY for declarations and/or docstrings. Return as
378 ;;; multiple values the BODY without docstrings or declarations, the
379 ;;; list of declaration forms and the docstring.
380 (defun parse-body (body &key declarations docstring)
381 (let ((value-declarations)
383 ;; Parse declarations
385 (do* ((rest body (cdr rest))
386 (form (car rest) (car rest)))
387 ((or (atom form) (not (eq (car form) 'declare)))
389 (push form value-declarations)))
393 (not (null (cdr body))))
394 (setq value-docstring (car body))
395 (setq body (cdr body)))
396 (values body value-declarations value-docstring)))
398 ;;; Compile a lambda function with lambda list LL and body BODY. If
399 ;;; NAME is given, it should be a constant string and it will become
400 ;;; the name of the function. If BLOCK is non-NIL, a named block is
401 ;;; created around the body. NOTE: No block (even anonymous) is
402 ;;; created if BLOCk is NIL.
403 (defun compile-lambda (ll body &key name block)
404 (multiple-value-bind (required-arguments
408 (parse-lambda-list ll)
409 (multiple-value-bind (body decls documentation)
410 (parse-body body :declarations t :docstring t)
411 (declare (ignore decls))
412 (let ((n-required-arguments (length required-arguments))
413 (n-optional-arguments (length optional-arguments))
414 (*environment* (extend-local-env
415 (append (ensure-list rest-argument)
420 (lambda-name/docstring-wrapper name documentation
421 `(function (|values| |nargs| ,@(mapcar (lambda (x)
422 (make-symbol (translate-variable x)))
423 (append required-arguments optional-arguments)))
424 ;; Check number of arguments
425 ,(lambda-check-argument-count n-required-arguments
427 (or rest-argument keyword-arguments))
428 ,(compile-lambda-optional ll)
429 ,(compile-lambda-rest ll)
430 ,(compile-lambda-parse-keywords ll)
432 ,(let ((*multiple-value-p* t))
434 (ls-compile-block `((block ,block ,@body)) t)
435 (ls-compile-block body t)))))))))
438 (defun setq-pair (var val)
439 (let ((b (lookup-in-lexenv var *environment* 'variable)))
442 (eq (binding-type b) 'variable)
443 (not (member 'special (binding-declarations b)))
444 (not (member 'constant (binding-declarations b))))
445 ;; TODO: Unnecesary make-symbol when codegen migration is
447 `(= ,(make-symbol (binding-value b)) ,(ls-compile val)))
448 ((and b (eq (binding-type b) 'macro))
449 (ls-compile `(setf ,var ,val)))
451 (ls-compile `(set ',var ,val))))))
454 (define-compilation setq (&rest pairs)
457 (return-from setq (ls-compile nil)))
463 (error "Odd pairs in SETQ"))
465 (push `,(setq-pair (car pairs) (cadr pairs)) result)
466 (setq pairs (cddr pairs)))))
467 `(progn ,@(reverse result))))
470 ;;; Compilation of literals an object dumping
472 ;;; BOOTSTRAP MAGIC: We record the macro definitions as lists during
473 ;;; the bootstrap. Once everything is compiled, we want to dump the
474 ;;; whole global environment to the output file to reproduce it in the
475 ;;; run-time. However, the environment must contain expander functions
476 ;;; rather than lists. We do not know how to dump function objects
477 ;;; itself, so we mark the list definitions with this object and the
478 ;;; compiler will be called when this object has to be dumped.
479 ;;; Backquote/unquote does a similar magic, but this use is exclusive.
481 ;;; Indeed, perhaps to compile the object other macros need to be
482 ;;; evaluated. For this reason we define a valid macro-function for
484 (defvar *magic-unquote-marker* (gensym "MAGIC-UNQUOTE"))
486 (setf (macro-function *magic-unquote-marker*)
487 (lambda (form &optional environment)
488 (declare (ignore environment))
491 (defvar *literal-table* nil)
492 (defvar *literal-counter* 0)
495 (incf *literal-counter*)
496 (concat "l" (integer-to-string *literal-counter*)))
498 (defun dump-symbol (symbol)
500 (let ((package (symbol-package symbol)))
501 (if (eq package (find-package "KEYWORD"))
502 `(new (call |Symbol| ,(dump-string (symbol-name symbol)) ,(dump-string (package-name package))))
503 `(new (call |Symbol| ,(dump-string (symbol-name symbol))))))
505 (let ((package (symbol-package symbol)))
507 `(new (call |Symbol| ,(dump-string (symbol-name symbol))))
508 (ls-compile `(intern ,(symbol-name symbol) ,(package-name package))))))
510 (defun dump-cons (cons)
511 (let ((head (butlast cons))
514 ,@(mapcar (lambda (x) `(code ,(literal x t))) head)
515 (code ,(literal (car tail) t))
516 (code ,(literal (cdr tail) t)))))
518 (defun dump-array (array)
519 (let ((elements (vector-to-list array)))
520 (list-to-vector (mapcar (lambda (x) `(code ,(literal x)))
523 (defun dump-string (string)
524 `(call |make_lisp_string| ,string))
526 (defun literal (sexp &optional recursive)
528 ((integerp sexp) (integer-to-string sexp))
529 ((floatp sexp) (float-to-string sexp))
530 ((characterp sexp) (js-escape-string (string sexp)))
532 (or (cdr (assoc sexp *literal-table* :test #'eql))
533 (let ((dumped (typecase sexp
534 (symbol (dump-symbol sexp))
535 (string (dump-string sexp))
537 ;; BOOTSTRAP MAGIC: See the root file
538 ;; jscl.lisp and the function
539 ;; `dump-global-environment' for futher
541 (if (eq (car sexp) *magic-unquote-marker*)
542 (ls-compile (second sexp))
544 (array (dump-array sexp)))))
545 (if (and recursive (not (symbolp sexp)))
547 (let ((jsvar (genlit)))
548 (push (cons sexp jsvar) *literal-table*)
549 (toplevel-compilation `(code "var " ,jsvar " = " ,dumped))
550 (when (keywordp sexp)
551 (toplevel-compilation `(code ,jsvar ".value = " ,jsvar)))
555 (define-compilation quote (sexp)
558 (define-compilation %while (pred &rest body)
560 `(while (!== ,(ls-compile pred) ,(ls-compile nil))
562 ; braces. Unnecesary when code
564 ,(ls-compile-block body))
565 `(return ,(ls-compile nil))))
567 (define-compilation function (x)
569 ((and (listp x) (eq (car x) 'lambda))
570 (compile-lambda (cadr x) (cddr x)))
571 ((and (listp x) (eq (car x) 'named-lambda))
572 (destructuring-bind (name ll &rest body) (cdr x)
573 (compile-lambda ll body
574 :name (symbol-name name)
577 (let ((b (lookup-in-lexenv x *environment* 'function)))
580 (ls-compile `(symbol-function ',x)))))))
583 (defun make-function-binding (fname)
584 (make-binding :name fname :type 'function :value (gvarname fname)))
586 (defun compile-function-definition (list)
587 (compile-lambda (car list) (cdr list)))
589 (defun translate-function (name)
590 (let ((b (lookup-in-lexenv name *environment* 'function)))
591 (and b (binding-value b))))
593 (define-compilation flet (definitions &rest body)
594 (let* ((fnames (mapcar #'car definitions))
595 (cfuncs (mapcar (lambda (def)
596 (compile-lambda (cadr def)
601 (extend-lexenv (mapcar #'make-function-binding fnames)
604 `(call (function ,(mapcar #'make-symbol (mapcar #'translate-function fnames))
605 ,(ls-compile-block body t))
608 (define-compilation labels (definitions &rest body)
609 (let* ((fnames (mapcar #'car definitions))
611 (extend-lexenv (mapcar #'make-function-binding fnames)
616 ,@(mapcar (lambda (func)
617 `(var (,(make-symbol (translate-function (car func)))
618 ,(compile-lambda (cadr func)
619 `((block ,(car func) ,@(cddr func)))))))
621 (ls-compile-block body t))))
624 (defvar *compiling-file* nil)
625 (define-compilation eval-when-compile (&rest body)
628 (eval (cons 'progn body))
630 (ls-compile `(progn ,@body))))
632 (defmacro define-transformation (name args form)
633 `(define-compilation ,name ,args
636 (define-compilation progn (&rest body)
637 (if (null (cdr body))
638 (ls-compile (car body) *multiple-value-p*)
640 ,@(append (mapcar #'ls-compile (butlast body))
641 (list (ls-compile (car (last body)) t))))))
643 (define-compilation macrolet (definitions &rest body)
644 (let ((*environment* (copy-lexenv *environment*)))
645 (dolist (def definitions)
646 (destructuring-bind (name lambda-list &body body) def
647 (let ((binding (make-binding :name name :type 'macro :value
648 (let ((g!form (gensym)))
650 (destructuring-bind ,lambda-list ,g!form
652 (push-to-lexenv binding *environment* 'function))))
653 (ls-compile `(progn ,@body) *multiple-value-p*)))
656 (defun special-variable-p (x)
657 (and (claimp x 'variable 'special) t))
659 ;;; Wrap CODE to restore the symbol values of the dynamic
660 ;;; bindings. BINDINGS is a list of pairs of the form
661 ;;; (SYMBOL . PLACE), where PLACE is a Javascript variable
662 ;;; name to initialize the symbol value and where to stored
664 (defun let-binding-wrapper (bindings body)
665 (when (null bindings)
666 (return-from let-binding-wrapper body))
671 (let ((s (ls-compile `',(car b))))
672 (collect `(= tmp (get ,s "value")))
673 (collect `(= (get ,s "value") ,(cdr b)))
674 (collect `(= ,(cdr b) tmp)))))
679 (let ((s (ls-compile `(quote ,(car b)))))
680 (collect `(= (get ,s "value") ,(cdr b)))))))))
682 (define-compilation let (bindings &rest body)
683 (let* ((bindings (mapcar #'ensure-list bindings))
684 (variables (mapcar #'first bindings))
685 (cvalues (mapcar #'ls-compile (mapcar #'second bindings)))
686 (*environment* (extend-local-env (remove-if #'special-variable-p variables)))
688 `(call (function ,(mapcar (lambda (x)
689 (if (special-variable-p x)
690 (let ((v (gvarname x)))
691 (push (cons x (make-symbol v)) dynamic-bindings)
693 (make-symbol (translate-variable x))))
695 ,(let ((body (ls-compile-block body t t)))
696 `,(let-binding-wrapper dynamic-bindings body)))
700 ;;; Return the code to initialize BINDING, and push it extending the
701 ;;; current lexical environment if the variable is not special.
702 (defun let*-initialize-value (binding)
703 (let ((var (first binding))
704 (value (second binding)))
705 (if (special-variable-p var)
706 `(code ,(ls-compile `(setq ,var ,value)) ";" )
707 (let* ((v (gvarname var))
708 (b (make-binding :name var :type 'variable :value v)))
709 (prog1 `(code "var " ,v " = " ,(ls-compile value) ";" )
710 (push-to-lexenv b *environment* 'variable))))))
712 ;;; Wrap BODY to restore the symbol values of SYMBOLS after body. It
713 ;;; DOES NOT generate code to initialize the value of the symbols,
714 ;;; unlike let-binding-wrapper.
715 (defun let*-binding-wrapper (symbols body)
717 (return-from let*-binding-wrapper body))
718 (let ((store (mapcar (lambda (s) (cons s (gvarname s)))
719 (remove-if-not #'special-variable-p symbols))))
723 ,@(mapcar (lambda (b)
724 (let ((s (ls-compile `(quote ,(car b)))))
725 `(code "var " ,(cdr b) " = " ,s ".value;" )))
731 ,@(mapcar (lambda (b)
732 (let ((s (ls-compile `(quote ,(car b)))))
733 `(code ,s ".value" " = " ,(cdr b) ";" )))
737 (define-compilation let* (bindings &rest body)
738 (let ((bindings (mapcar #'ensure-list bindings))
739 (*environment* (copy-lexenv *environment*)))
741 (let ((specials (remove-if-not #'special-variable-p (mapcar #'first bindings)))
742 (body `(code ,@(mapcar #'let*-initialize-value bindings)
743 ,(ls-compile-block body t t))))
744 (let*-binding-wrapper specials body)))))
747 (define-compilation block (name &rest body)
748 ;; We use Javascript exceptions to implement non local control
749 ;; transfer. Exceptions has dynamic scoping, so we use a uniquely
750 ;; generated object to identify the block. The instance of a empty
751 ;; array is used to distinguish between nested dynamic Javascript
752 ;; exceptions. See https://github.com/davazp/jscl/issues/64 for
754 (let* ((idvar (gvarname name))
755 (b (make-binding :name name :type 'block :value idvar)))
756 (when *multiple-value-p*
757 (push 'multiple-value (binding-declarations b)))
758 (let* ((*environment* (extend-lexenv (list b) *environment* 'block))
759 (cbody (ls-compile-block body t)))
760 (if (member 'used (binding-declarations b))
763 "var " idvar " = [];"
767 " if (cf.type == 'block' && cf.id == " idvar ")"
768 (if *multiple-value-p*
769 " return values.apply(this, forcemv(cf.values));"
770 " return cf.values;")
775 (js!selfcall cbody)))))
777 (define-compilation return-from (name &optional value)
778 (let* ((b (lookup-in-lexenv name *environment* 'block))
779 (multiple-value-p (member 'multiple-value (binding-declarations b))))
781 (error "Return from unknown block `~S'." (symbol-name name)))
782 (push 'used (binding-declarations b))
783 ;; The binding value is the name of a variable, whose value is the
784 ;; unique identifier of the block as exception. We can't use the
785 ;; variable name itself, because it could not to be unique, so we
786 ;; capture it in a closure.
788 (when multiple-value-p
789 `(var (|values| |mv|)))
793 "id" ,(make-symbol (binding-value b))
794 "values" ,(ls-compile value multiple-value-p)
795 "message" ,(concat "Return from unknown block '" (symbol-name name) "'."))))))
797 (define-compilation catch (id &rest body)
799 `(var (|id| ,(ls-compile id)))
801 ,(ls-compile-block body t))
803 (if (and (== (get |cf| "type") "catch")
804 (== (get |cf| "id") |id|))
805 ,(if *multiple-value-p*
806 `(return (call (get |values| "apply")
808 (call |forcemv| (get |cf| "values"))))
809 `(return (call (get |pv| "apply")
811 (call |forcemv| (get |cf| "values")))))
814 (define-compilation throw (id value)
816 `(var (|values| |mv|))
819 |id| ,(ls-compile id)
820 |values| ,(ls-compile value t)
821 |message| "Throw uncatched."))))
824 (or (integerp x) (symbolp x)))
826 (defun declare-tagbody-tags (tbidx body)
827 (let* ((go-tag-counter 0)
829 (mapcar (lambda (label)
830 (let ((tagidx (incf go-tag-counter)))
831 (make-binding :name label :type 'gotag :value (list tbidx tagidx))))
832 (remove-if-not #'go-tag-p body))))
833 (extend-lexenv bindings *environment* 'gotag)))
835 (define-compilation tagbody (&rest body)
836 ;; Ignore the tagbody if it does not contain any go-tag. We do this
837 ;; because 1) it is easy and 2) many built-in forms expand to a
838 ;; implicit tagbody, so we save some space.
839 (unless (some #'go-tag-p body)
840 (return-from tagbody (ls-compile `(progn ,@body nil))))
841 ;; The translation assumes the first form in BODY is a label
842 (unless (go-tag-p (car body))
843 (push (gensym "START") body))
844 ;; Tagbody compilation
845 (let ((branch (gvarname 'branch))
846 (tbidx (gvarname 'tbidx)))
847 (let ((*environment* (declare-tagbody-tags tbidx body))
849 (let ((b (lookup-in-lexenv (first body) *environment* 'gotag)))
850 (setq initag (second (binding-value b))))
852 ;; TAGBODY branch to take
853 `(var (,(make-symbol branch) ,initag))
854 `(var (,(make-symbol tbidx) #()))
858 (switch ,(make-symbol branch)
860 (collect `(case ,initag))
861 (dolist (form (cdr body))
863 (let ((b (lookup-in-lexenv form *environment* 'gotag)))
864 (collect `(case ,(second (binding-value b)))))
866 (collect (ls-compile form))
868 (collect '(code ";"))))))
872 (if (and (== (get jump "type") "tagbody")
873 (== (get jump "id") ,(make-symbol tbidx)))
874 (= ,(make-symbol branch) (get 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))
889 "id" ,(make-symbol (first (binding-value b)))
890 "label" ,(second (binding-value b))
891 "message" ,(concat "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 ,(vector (if *multiple-value-p* '|values| '|pv|) 0)))
908 `(var (|values| |mv|))
913 (collect `(= vs ,(ls-compile form t)))
914 (collect `(if (and (=== (typeof vs) "object")
915 (in "multiple-value" vs))
916 (= args (call (get args "concat") vs))
917 (call (get args "push") vs))))))
918 `(= (property args 1) (- (property args "length") 2))
919 `(return (call (get 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 ;; TODO: Interleave is temporal
925 `(progn ,@(interleave (mapcar #'ls-compile forms)
930 (define-transformation backquote (form)
931 (bq-completely-process form))
936 (defvar *builtins* nil)
938 (defmacro define-raw-builtin (name args &body body)
939 ;; Creates a new primitive function `name' with parameters args and
940 ;; @body. The body can access to the local environment through the
941 ;; variable *ENVIRONMENT*.
942 `(push (list ',name (lambda ,args (block ,name ,@body)))
945 (defmacro define-builtin (name args &body body)
946 `(define-raw-builtin ,name ,args
947 (let ,(mapcar (lambda (arg) `(,arg (ls-compile ,arg))) args)
950 ;;; DECLS is a list of (JSVARNAME TYPE LISPFORM) declarations.
951 (defmacro type-check (decls &body body)
953 ,@(mapcar (lambda (decl)
954 `(let ((name ,(first decl))
955 (value ,(third decl)))
956 `(code "var " ,name " = " ,value ";" )))
958 ,@(mapcar (lambda (decl)
959 `(let ((name ,(first decl))
960 (type ,(second decl)))
961 `(code "if (typeof " ,name " != '" ,type "')"
962 (code "throw 'The value ' + "
964 " + ' is not a type "
969 `(code "return " ,,@body ";" )))
971 ;;; VARIABLE-ARITY compiles variable arity operations. ARGS stands for
972 ;;; a variable which holds a list of forms. It will compile them and
973 ;;; store the result in some Javascript variables. BODY is evaluated
974 ;;; with ARGS bound to the list of these variables to generate the
975 ;;; code which performs the transformation on these variables.
977 (defun variable-arity-call (args function)
979 (error "ARGS must be a non-empty list"))
984 (if (or (floatp x) (numberp x))
986 (let ((v (make-symbol (concat "x" (integer-to-string (incf counter))))))
988 (push `(var (,v ,(ls-compile x)))
990 (push `(if (!= (typeof ,v) "number")
991 (throw "Not a number!"))
994 `(progn ,@(reverse prelude))
995 (funcall function (reverse fargs)))))
998 (defmacro variable-arity (args &body body)
999 (unless (symbolp args)
1000 (error "`~S' is not a symbol." args))
1001 `(variable-arity-call ,args
1003 `(code "return " ,,@body ";" ))))
1005 (defun num-op-num (x op y)
1006 (type-check (("x" "number" x) ("y" "number" y))
1007 `(code "x" ,op "y")))
1009 (define-raw-builtin + (&rest numbers)
1012 (variable-arity numbers
1015 (define-raw-builtin - (x &rest others)
1016 (let ((args (cons x others)))
1017 (variable-arity args `(- ,@args))))
1019 (define-raw-builtin * (&rest numbers)
1022 (variable-arity numbers `(* ,@numbers))))
1024 (define-raw-builtin / (x &rest others)
1025 (let ((args (cons x others)))
1026 (variable-arity args
1029 (reduce (lambda (x y) `(/ ,x ,y))
1032 (define-builtin mod (x y) (num-op-num x "%" y))
1035 (defun comparison-conjuntion (vars op)
1040 `(,op ,(car vars) ,(cadr vars)))
1042 `(and (,op ,(car vars) ,(cadr vars))
1043 ,(comparison-conjuntion (cdr vars) op)))))
1045 (defmacro define-builtin-comparison (op sym)
1046 `(define-raw-builtin ,op (x &rest args)
1047 (let ((args (cons x args)))
1048 (variable-arity args
1049 (js!bool (comparison-conjuntion args ',sym))))))
1051 (define-builtin-comparison > >)
1052 (define-builtin-comparison < <)
1053 (define-builtin-comparison >= >=)
1054 (define-builtin-comparison <= <=)
1055 (define-builtin-comparison = ==)
1056 (define-builtin-comparison /= !=)
1058 (define-builtin numberp (x)
1059 (js!bool `(== (typeof ,x) "number")))
1061 (define-builtin floor (x)
1062 (type-check (("x" "number" x))
1065 (define-builtin expt (x y)
1066 (type-check (("x" "number" x)
1070 (define-builtin float-to-string (x)
1071 (type-check (("x" "number" x))
1072 "make_lisp_string(x.toString())"))
1074 (define-builtin cons (x y)
1075 `(object "car" ,x "cdr" ,y))
1077 (define-builtin consp (x)
1081 `(return (and (== (typeof tmp) "object")
1084 (define-builtin car (x)
1087 `(return (if (=== tmp ,(ls-compile nil))
1091 (define-builtin cdr (x)
1094 `(return (if (=== tmp ,(ls-compile nil))
1098 (define-builtin rplaca (x new)
1099 (type-check (("x" "object" x))
1100 `(code "(x.car = " ,new ", x)")))
1102 (define-builtin rplacd (x new)
1103 (type-check (("x" "object" x))
1104 `(code "(x.cdr = " ,new ", x)")))
1106 (define-builtin symbolp (x)
1107 (js!bool `(instanceof ,x |Symbol|)))
1109 (define-builtin make-symbol (name)
1110 `(new (call |Symbol| ,name)))
1112 (define-builtin symbol-name (x)
1115 (define-builtin set (symbol value)
1116 `(= (get ,symbol "value") ,value))
1118 (define-builtin fset (symbol value)
1119 `(= (get ,symbol "fvalue") ,value))
1121 (define-builtin boundp (x)
1122 (js!bool `(!== (get ,x "value") undefined)))
1124 (define-builtin fboundp (x)
1125 (js!bool `(!== (get ,x "fvalue") undefined)))
1127 (define-builtin symbol-value (x)
1130 (value (get symbol "value")))
1131 `(if (=== value undefined)
1132 (throw (+ "Variable `" (call |xstring| (get symbol "name")) "' is unbound.")))
1135 (define-builtin symbol-function (x)
1138 (func (get symbol "fvalue")))
1139 `(if (=== func undefined)
1140 (throw (+ "Function `" (call |xstring| (get symbol "name")) "' is undefined.")))
1143 (define-builtin symbol-plist (x)
1144 `(or (get ,x "plist") ,(ls-compile nil)))
1146 (define-builtin lambda-code (x)
1147 `(call |make_lisp_string| (call (get ,x "toString"))))
1149 (define-builtin eq (x y)
1150 (js!bool `(=== ,x ,y)))
1152 (define-builtin char-code (x)
1153 (type-check (("x" "string" x))
1154 "char_to_codepoint(x)"))
1156 (define-builtin code-char (x)
1157 (type-check (("x" "number" x))
1158 "char_from_codepoint(x)"))
1160 (define-builtin characterp (x)
1164 `(return (and (== (typeof x) "string")
1165 (or (== (get x "length") 1)
1166 (== (get x "length") 2)))))))
1168 (define-builtin char-upcase (x)
1169 `(call |safe_char_upcase| ,x))
1171 (define-builtin char-downcase (x)
1172 `(call |safe_char_downcase| ,x))
1174 (define-builtin stringp (x)
1178 `(return (and (and (===(typeof x) "object")
1180 (== (get x "stringp") 1))))))
1182 (define-raw-builtin funcall (func &rest args)
1184 `(var (f ,(ls-compile func)))
1185 `(return (call (if (=== (typeof f) "function")
1188 ,@(list* (if *multiple-value-p* '|values| '|pv|)
1190 (mapcar #'ls-compile args))))))
1192 (define-raw-builtin apply (func &rest args)
1195 (let ((args (butlast args))
1196 (last (car (last args))))
1198 `(var (f ,(ls-compile func)))
1199 `(var (args ,(list-to-vector
1200 (list* (if *multiple-value-p* '|values| '|pv|)
1202 (mapcar #'ls-compile args)))))
1203 `(var (tail ,(ls-compile last)))
1204 `(while (!= tail ,(ls-compile nil))
1205 (call (get args "push") (get tail "car"))
1206 (post++ (property args 1))
1207 (= tail (get tail "cdr")))
1208 `(return (call (get (if (=== (typeof f) "function")
1215 (define-builtin js-eval (string)
1216 (if *multiple-value-p*
1218 `(var (v (call |globalEval| (call |xstring| ,string))))
1219 `(return (call (get |values| "apply") this (call |forcemv| v))))
1220 `(call |globalEval| (call |xstring| ,string))))
1222 (define-builtin %throw (string)
1223 (js!selfcall* `(throw ,string)))
1225 (define-builtin functionp (x)
1226 (js!bool `(=== (typeof ,x) "function")))
1228 (define-builtin %write-string (x)
1229 `(call (get |lisp| "write") ,x))
1231 (define-builtin /debug (x)
1232 `(call (get |console| "log") (call |xstring| ,x)))
1235 ;;; Storage vectors. They are used to implement arrays and (in the
1236 ;;; future) structures.
1238 (define-builtin storage-vector-p (x)
1242 `(return (and (=== (typeof x) "object") (in "length" x))))))
1244 (define-builtin make-storage-vector (n)
1247 `(= (get r "length") ,n)
1250 (define-builtin storage-vector-size (x)
1253 (define-builtin resize-storage-vector (vector new-size)
1254 `(= (get ,vector "length") ,new-size))
1256 (define-builtin storage-vector-ref (vector n)
1258 `(var (x (property ,vector ,n)))
1259 `(if (=== x undefined) (throw "Out of range."))
1262 (define-builtin storage-vector-set (vector n value)
1266 `(if (or (< i 0) (>= i (get x "length")))
1267 (throw "Out of range."))
1268 `(return (= (property x i) ,value))))
1270 (define-builtin concatenate-storage-vector (sv1 sv2)
1273 `(var (r (call (get sv1 "concat") ,sv2)))
1274 `(= (get r "type") (get sv1 "type"))
1275 `(= (get r "stringp") (get sv1 "stringp"))
1278 (define-builtin get-internal-real-time ()
1279 `(call (get (new (call |Date|)) "getTime")))
1281 (define-builtin values-array (array)
1282 (if *multiple-value-p*
1283 `(call (get |values| "apply") this ,array)
1284 `(call (get |pv| "apply") this ,array)))
1286 (define-raw-builtin values (&rest args)
1287 (if *multiple-value-p*
1288 `(call |values| ,@(mapcar #'ls-compile args))
1289 `(call |pv| ,@(mapcar #'ls-compile args))))
1293 (define-builtin new ()
1296 (define-raw-builtin oget* (object key &rest keys)
1299 (var (tmp (property ,(ls-compile object) (call |xstring| ,(ls-compile key)))))
1300 ,@(mapcar (lambda (key)
1302 (if (=== tmp undefined) (return ,(ls-compile nil)))
1303 (= tmp (property tmp (call |xstring| ,(ls-compile key))))))
1305 `(return (if (=== tmp undefined) ,(ls-compile nil) tmp))))
1307 (define-raw-builtin oset* (value object key &rest keys)
1308 (let ((keys (cons key keys)))
1311 (var (obj ,(ls-compile object)))
1312 ,@(mapcar (lambda (key)
1314 (= obj (property obj (call |xstring| ,(ls-compile key))))
1315 (if (=== object undefined)
1316 (throw "Impossible to set object property."))))
1319 (= (property obj (call |xstring| ,(ls-compile (car (last keys)))))
1320 ,(ls-compile value))))
1321 (return (if (=== tmp undefined)
1325 (define-raw-builtin oget (object key &rest keys)
1326 `(call |js_to_lisp| ,(ls-compile `(oget* ,object ,key ,@keys))))
1328 (define-raw-builtin oset (value object key &rest keys)
1329 (ls-compile `(oset* (lisp-to-js ,value) ,object ,key ,@keys)))
1331 (define-builtin objectp (x)
1332 (js!bool `(=== (typeof ,x) "object")))
1334 (define-builtin lisp-to-js (x) `(call |lisp_to_js| ,x))
1335 (define-builtin js-to-lisp (x) `(call |js_to_lisp| ,x))
1338 (define-builtin in (key object)
1339 (js!bool `(in (call |xstring| ,key) ,object)))
1341 (define-builtin map-for-in (function object)
1344 (g (if (=== (typeof f) "function") f (get f "fvalue")))
1347 (call g ,(if *multiple-value-p* '|values| '|pv|) 1 (get o "key")))
1348 `(return ,(ls-compile nil))))
1350 (define-compilation %js-vref (var)
1351 `(call |js_to_lisp| ,(make-symbol var)))
1353 (define-compilation %js-vset (var val)
1354 `(= ,(make-symbol var) (call |lisp_to_js| ,(ls-compile val))))
1356 (define-setf-expander %js-vref (var)
1357 (let ((new-value (gensym)))
1358 (unless (stringp var)
1359 (error "`~S' is not a string." var))
1363 `(%js-vset ,var ,new-value)
1368 (defvar *macroexpander-cache*
1369 (make-hash-table :test #'eq))
1371 (defun !macro-function (symbol)
1372 (unless (symbolp symbol)
1373 (error "`~S' is not a symbol." symbol))
1374 (let ((b (lookup-in-lexenv symbol *environment* 'function)))
1375 (if (and b (eq (binding-type b) 'macro))
1376 (let ((expander (binding-value b)))
1379 ((gethash b *macroexpander-cache*)
1380 (setq expander (gethash b *macroexpander-cache*)))
1382 (let ((compiled (eval expander)))
1383 ;; The list representation are useful while
1384 ;; bootstrapping, as we can dump the definition of the
1385 ;; macros easily, but they are slow because we have to
1386 ;; evaluate them and compile them now and again. So, let
1387 ;; us replace the list representation version of the
1388 ;; function with the compiled one.
1390 #+jscl (setf (binding-value b) compiled)
1391 #-jscl (setf (gethash b *macroexpander-cache*) compiled)
1392 (setq expander compiled))))
1396 (defun !macroexpand-1 (form)
1399 (let ((b (lookup-in-lexenv form *environment* 'variable)))
1400 (if (and b (eq (binding-type b) 'macro))
1401 (values (binding-value b) t)
1402 (values form nil))))
1403 ((and (consp form) (symbolp (car form)))
1404 (let ((macrofun (!macro-function (car form))))
1406 (values (funcall macrofun (cdr form)) t)
1407 (values form nil))))
1409 (values form nil))))
1411 (defun compile-funcall (function args)
1412 (let* ((values-funcs (if *multiple-value-p* "values" "pv"))
1413 (arglist `(code "(" ,@(interleave (list* values-funcs
1414 (integer-to-string (length args))
1415 (mapcar #'ls-compile args))
1418 (unless (or (symbolp function)
1419 (and (consp function)
1420 (member (car function) '(lambda oget))))
1421 (error "Bad function designator `~S'" function))
1423 ((translate-function function)
1424 `(code ,(translate-function function) ,arglist))
1425 ((and (symbolp function)
1426 #+jscl (eq (symbol-package function) (find-package "COMMON-LISP"))
1428 `(code ,(ls-compile `',function) ".fvalue" ,arglist))
1429 #+jscl((symbolp function)
1430 `(code ,(ls-compile `#',function) ,arglist))
1431 ((and (consp function) (eq (car function) 'lambda))
1432 `(code ,(ls-compile `#',function) ,arglist))
1433 ((and (consp function) (eq (car function) 'oget))
1434 `(code ,(ls-compile function) ,arglist))
1436 (error "Bad function descriptor")))))
1438 (defun ls-compile-block (sexps &optional return-last-p decls-allowed-p)
1439 (multiple-value-bind (sexps decls)
1440 (parse-body sexps :declarations decls-allowed-p)
1441 (declare (ignore decls))
1443 `(code ,(ls-compile-block (butlast sexps) nil decls-allowed-p)
1444 "return " ,(ls-compile (car (last sexps)) *multiple-value-p*) ";")
1446 ,@(interleave (mapcar #'ls-compile sexps) ";
1450 (defun ls-compile* (sexp &optional multiple-value-p)
1451 (multiple-value-bind (sexp expandedp) (!macroexpand-1 sexp)
1453 (return-from ls-compile* (ls-compile sexp multiple-value-p)))
1454 ;; The expression has been macroexpanded. Now compile it!
1455 (let ((*multiple-value-p* multiple-value-p))
1458 (let ((b (lookup-in-lexenv sexp *environment* 'variable)))
1460 ((and b (not (member 'special (binding-declarations b))))
1462 ((or (keywordp sexp)
1463 (and b (member 'constant (binding-declarations b))))
1464 `(code ,(ls-compile `',sexp) ".value"))
1466 (ls-compile `(symbol-value ',sexp))))))
1467 ((or (integerp sexp) (floatp sexp) (characterp sexp) (stringp sexp) (arrayp sexp))
1470 (let ((name (car sexp))
1474 ((assoc name *compilations*)
1475 (let ((comp (second (assoc name *compilations*))))
1477 ;; Built-in functions
1478 ((and (assoc name *builtins*)
1479 (not (claimp name 'function 'notinline)))
1480 (let ((comp (second (assoc name *builtins*))))
1483 (compile-funcall name args)))))
1485 (error "How should I compile `~S'?" sexp))))))
1487 (defun ls-compile (sexp &optional multiple-value-p)
1488 `(code "(" ,(ls-compile* sexp multiple-value-p) ")"))
1491 (defvar *compile-print-toplevels* nil)
1493 (defun truncate-string (string &optional (width 60))
1494 (let ((n (or (position #\newline string)
1495 (min width (length string)))))
1496 (subseq string 0 n)))
1498 (defun convert-toplevel (sexp &optional multiple-value-p)
1499 (let ((*toplevel-compilations* nil))
1501 ;; Non-empty toplevel progn
1503 (eq (car sexp) 'progn)
1506 ,@(mapcar (lambda (s) (convert-toplevel s t))
1509 (when *compile-print-toplevels*
1510 (let ((form-string (prin1-to-string sexp)))
1511 (format t "Compiling ~a..." (truncate-string form-string))))
1512 (let ((code (ls-compile sexp multiple-value-p)))
1514 ,@(interleave (get-toplevel-compilations) ";
1517 `(code ,code ";"))))))))
1519 (defun ls-compile-toplevel (sexp &optional multiple-value-p)
1520 (with-output-to-string (*standard-output*)
1521 (js (convert-toplevel sexp multiple-value-p))))