;;; language to the compiler to be able to run.
#+ecmalisp
(progn
- (eval-when-compile
- (%compile-defmacro 'defmacro
- '(lambda (name args &rest body)
- `(eval-when-compile
- (%compile-defmacro ',name
- '(lambda ,(mapcar (lambda (x)
- (if (eq x '&body)
- '&rest
- x))
- args)
- ,@body))))))
-
- (defmacro %defvar (name value)
- `(progn
- (eval-when-compile
- (%compile-defvar ',name))
- (setq ,name ,value)))
+ (eval-when-compile
+ (%compile-defmacro 'defmacro
+ '(lambda (name args &rest body)
+ `(eval-when-compile
+ (%compile-defmacro ',name
+ '(lambda ,(mapcar (lambda (x)
+ (if (eq x '&body)
+ '&rest
+ x))
+ args)
+ ,@body))))))
+
+ (defmacro %defvar (name value)
+ `(progn
+ (eval-when-compile
+ (%compile-defvar ',name))
+ (setq ,name ,value)))
(defmacro defvar (name &optional value)
`(%defvar ,name ,value))
(defmacro defun (name args &rest body)
`(%defun ,name ,args ,@body))
- (defvar *package* (new))
-
- (defvar nil (make-symbol "NIL"))
- (set *package* "NIL" nil)
-
- (defvar t (make-symbol "T"))
- (set *package* "T" t)
-
- (defun null (x)
- (eq x nil))
-
- (defmacro return (&optional value)
- `(return-from nil ,value))
-
- (defmacro while (condition &body body)
- `(block nil (%while ,condition ,@body)))
-
- (defun internp (name)
- (in name *package*))
-
- (defun intern (name)
- (if (internp name)
- (get *package* name)
- (set *package* name (make-symbol name))))
+ (defvar *package* (new))
- (defun find-symbol (name)
- (get *package* name))
+ (defvar nil (make-symbol "NIL"))
+ (set *package* "NIL" nil)
- (defvar *gensym-counter* 0)
- (defun gensym (&optional (prefix "G"))
- (setq *gensym-counter* (+ *gensym-counter* 1))
- (make-symbol (concat-two prefix (integer-to-string *gensym-counter*))))
+ (defvar t (make-symbol "T"))
+ (set *package* "T" t)
- ;; Basic functions
- (defun = (x y) (= x y))
- (defun + (x y) (+ x y))
- (defun - (x y) (- x y))
- (defun * (x y) (* x y))
- (defun / (x y) (/ x y))
- (defun 1+ (x) (+ x 1))
- (defun 1- (x) (- x 1))
- (defun zerop (x) (= x 0))
- (defun truncate (x y) (floor (/ x y)))
+ (defun null (x)
+ (eq x nil))
- (defun eql (x y) (eq x y))
+ (defmacro return (&optional value)
+ `(return-from nil ,value))
- (defun not (x) (if x nil t))
-
- (defun cons (x y ) (cons x y))
- (defun consp (x) (consp x))
- (defun car (x) (car x))
- (defun cdr (x) (cdr x))
- (defun caar (x) (car (car x)))
- (defun cadr (x) (car (cdr x)))
- (defun cdar (x) (cdr (car x)))
- (defun cddr (x) (cdr (cdr x)))
- (defun caddr (x) (car (cdr (cdr x))))
- (defun cdddr (x) (cdr (cdr (cdr x))))
- (defun cadddr (x) (car (cdr (cdr (cdr x)))))
- (defun first (x) (car x))
- (defun second (x) (cadr x))
- (defun third (x) (caddr x))
- (defun fourth (x) (cadddr x))
-
- (defun list (&rest args) args)
- (defun atom (x)
- (not (consp x)))
-
- ;; Basic macros
+ (defmacro while (condition &body body)
+ `(block nil (%while ,condition ,@body)))
+
+ (defun internp (name)
+ (in name *package*))
+
+ (defun intern (name)
+ (if (internp name)
+ (get *package* name)
+ (set *package* name (make-symbol name))))
+
+ (defun find-symbol (name)
+ (get *package* name))
+
+ (defvar *gensym-counter* 0)
+ (defun gensym (&optional (prefix "G"))
+ (setq *gensym-counter* (+ *gensym-counter* 1))
+ (make-symbol (concat-two prefix (integer-to-string *gensym-counter*))))
+
+ ;; Basic functions
+ (defun = (x y) (= x y))
+ (defun + (x y) (+ x y))
+ (defun - (x y) (- x y))
+ (defun * (x y) (* x y))
+ (defun / (x y) (/ x y))
+ (defun 1+ (x) (+ x 1))
+ (defun 1- (x) (- x 1))
+ (defun zerop (x) (= x 0))
+ (defun truncate (x y) (floor (/ x y)))
+
+ (defun eql (x y) (eq x y))
+
+ (defun not (x) (if x nil t))
+
+ (defun cons (x y ) (cons x y))
+ (defun consp (x) (consp x))
+ (defun car (x) (car x))
+ (defun cdr (x) (cdr x))
+ (defun caar (x) (car (car x)))
+ (defun cadr (x) (car (cdr x)))
+ (defun cdar (x) (cdr (car x)))
+ (defun cddr (x) (cdr (cdr x)))
+ (defun caddr (x) (car (cdr (cdr x))))
+ (defun cdddr (x) (cdr (cdr (cdr x))))
+ (defun cadddr (x) (car (cdr (cdr (cdr x)))))
+ (defun first (x) (car x))
+ (defun second (x) (cadr x))
+ (defun third (x) (caddr x))
+ (defun fourth (x) (cadddr x))
+
+ (defun list (&rest args) args)
+ (defun atom (x)
+ (not (consp x)))
+
+ ;; Basic macros
(defmacro incf (x &optional (delta 1))
`(setq ,x (+ ,x ,delta)))
(defmacro decf (x &optional (delta 1))
`(setq ,x (- ,x ,delta)))
- (defmacro push (x place)
- `(setq ,place (cons ,x ,place)))
-
- (defmacro when (condition &body body)
- `(if ,condition (progn ,@body) nil))
-
- (defmacro unless (condition &body body)
- `(if ,condition nil (progn ,@body)))
-
- (defmacro dolist (iter &body body)
- (let ((var (first iter))
- (g!list (gensym)))
- `(let ((,g!list ,(second iter))
- (,var nil))
- (while ,g!list
- (setq ,var (car ,g!list))
- ,@body
- (setq ,g!list (cdr ,g!list)))
- ,(third iter))))
-
- (defmacro dotimes (iter &body body)
- (let ((g!to (gensym))
- (var (first iter))
- (to (second iter))
- (result (third iter)))
- `(let ((,var 0)
- (,g!to ,to))
- (while (< ,var ,g!to)
- ,@body
- (incf ,var))
- ,result)))
-
- (defmacro cond (&rest clausules)
- (if (null clausules)
- nil
- (if (eq (caar clausules) t)
- `(progn ,@(cdar clausules))
- `(if ,(caar clausules)
- (progn ,@(cdar clausules))
- (cond ,@(cdr clausules))))))
-
- (defmacro case (form &rest clausules)
- (let ((!form (gensym)))
- `(let ((,!form ,form))
- (cond
- ,@(mapcar (lambda (clausule)
- (if (eq (car clausule) t)
- clausule
- `((eql ,!form ',(car clausule))
- ,@(cdr clausule))))
- clausules)))))
+ (defmacro push (x place)
+ `(setq ,place (cons ,x ,place)))
+
+ (defmacro when (condition &body body)
+ `(if ,condition (progn ,@body) nil))
+
+ (defmacro unless (condition &body body)
+ `(if ,condition nil (progn ,@body)))
+
+ (defmacro dolist (iter &body body)
+ (let ((var (first iter))
+ (g!list (gensym)))
+ `(block nil
+ (let ((,g!list ,(second iter))
+ (,var nil))
+ (%while ,g!list
+ (setq ,var (car ,g!list))
+ ,@body
+ (setq ,g!list (cdr ,g!list)))
+ ,(third iter)))))
+
+ (defmacro dotimes (iter &body body)
+ (let ((g!to (gensym))
+ (var (first iter))
+ (to (second iter))
+ (result (third iter)))
+ `(block nil
+ (let ((,var 0)
+ (,g!to ,to))
+ (%while (< ,var ,g!to)
+ ,@body
+ (incf ,var))
+ ,result))))
+
+ (defmacro cond (&rest clausules)
+ (if (null clausules)
+ nil
+ (if (eq (caar clausules) t)
+ `(progn ,@(cdar clausules))
+ `(if ,(caar clausules)
+ (progn ,@(cdar clausules))
+ (cond ,@(cdr clausules))))))
+
+ (defmacro case (form &rest clausules)
+ (let ((!form (gensym)))
+ `(let ((,!form ,form))
+ (cond
+ ,@(mapcar (lambda (clausule)
+ (if (eq (car clausule) t)
+ clausule
+ `((eql ,!form ',(car clausule))
+ ,@(cdr clausule))))
+ clausules)))))
(defmacro ecase (form &rest clausules)
`(case ,form
`(let ((,g ,(car forms)))
(if ,g ,g (or ,@(cdr forms))))))))
- (defmacro prog1 (form &body body)
- (let ((value (gensym)))
- `(let ((,value ,form))
- ,@body
- ,value))))
+ (defmacro prog1 (form &body body)
+ (let ((value (gensym)))
+ `(let ((,value ,form))
+ ,@body
+ ,value))))
;;; This couple of helper functions will be defined in both Common
;;; Lisp and in Ecmalisp.
(defun subseq (seq a &optional b)
(cond
- ((stringp seq)
- (if b
- (slice seq a b)
- (slice seq a)))
- (t
- (error "Unsupported argument."))))
+ ((stringp seq)
+ (if b
+ (slice seq a b)
+ (slice seq a)))
+ (t
+ (error "Unsupported argument."))))
(defun parse-integer (string)
(let ((value 0)
(incf index))
value))
+ (defun some (function seq)
+ (cond
+ ((stringp seq)
+ (let ((index 0)
+ (size (length seq)))
+ (while (< index size)
+ (when (funcall function (char seq index))
+ (return-from some t))
+ (incf index))
+ nil))
+ ((listp seq)
+ (dolist (x seq nil)
+ (when (funcall function x)
+ (return t))))
+ (t
+ (error "Unknown sequence."))))
+
(defun every (function seq)
- ;; string
- (let ((index 0)
- (size (length seq)))
- (while (< index size)
- (unless (funcall function (char seq index))
- (return-from every nil))
- (incf index))
- t))
+ (cond
+ ((stringp seq)
+ (let ((index 0)
+ (size (length seq)))
+ (while (< index size)
+ (unless (funcall function (char seq index))
+ (return-from every nil))
+ (incf index))
+ t))
+ ((listp seq)
+ (dolist (x seq t)
+ (unless (funcall function x)
+ (return))))
+ (t
+ (error "Unknown sequence."))))
(defun assoc (x alist)
(while alist
(defun concat (&rest strs)
(!reduce #'concat-two strs ""))
+(defmacro concatf (variable &body form)
+ `(setq ,variable (concat ,variable (progn ,@form))))
+
;;; Concatenate a list of strings, with a separator
(defun join (list &optional (separator ""))
(cond
(join (mapcar (lambda (d) (string (char "0123456789" d)))
digits))))))
+
+(defun js!selfcall (&rest args)
+ (concat "(function(){" *newline* (apply #'indent args) "})()"))
+
+
;;; Printer
#+ecmalisp
(progn
- (defun print-to-string (form)
+ (defun prin1-to-string (form)
(cond
((symbolp form) (symbol-name form))
((integerp form) (integer-to-string form))
(concat "#<FUNCTION>"))))
((listp form)
(concat "("
- (join-trailing (mapcar #'print-to-string (butlast form)) " ")
+ (join-trailing (mapcar #'prin1-to-string (butlast form)) " ")
(let ((last (last form)))
(if (null (cdr last))
- (print-to-string (car last))
- (concat (print-to-string (car last)) " . " (print-to-string (cdr last)))))
+ (prin1-to-string (car last))
+ (concat (prin1-to-string (car last)) " . " (prin1-to-string (cdr last)))))
")"))))
(defun write-line (x)
x)
(defun print (x)
- (write-line (print-to-string x))
+ (write-line (prin1-to-string x))
x))
(defvar *compilation-unit-checks* '())
-(defun make-binding (name type js declared)
- (list name type js declared))
+(defun make-binding (name type translation declared)
+ (list name type translation declared))
(defun binding-name (b) (first b))
(defun binding-type (b) (second b))
(setcar (cdddr b) t))
(defun make-lexenv ()
- (list nil nil nil))
+ (list nil nil nil nil))
(defun copy-lexenv (lexenv)
(copy-list lexenv))
(function
(setcar (cdr lexenv) (cons binding (cadr lexenv))))
(block
- (setcar (cddr lexenv) (cons binding (caddr lexenv))))))
+ (setcar (cddr lexenv) (cons binding (caddr lexenv))))
+ (gotag
+ (setcar (cdddr lexenv) (cons binding (cadddr lexenv))))))
-(defun extend-lexenv (binding lexenv namespace)
+(defun extend-lexenv (bindings lexenv namespace)
(let ((env (copy-lexenv lexenv)))
- (push-to-lexenv binding env namespace)
- env))
+ (dolist (binding (reverse bindings) env)
+ (push-to-lexenv binding env namespace))))
(defun lookup-in-lexenv (name lexenv namespace)
(assoc name (ecase namespace
(variable (first lexenv))
(function (second lexenv))
- (block (third lexenv)))))
+ (block (third lexenv))
+ (gotag (fourth lexenv)))))
(defvar *environment* (make-lexenv))
;; Creates a new primitive `name' with parameters args and
;; @body. The body can access to the local environment through the
;; variable ENV.
- `(push (list ',name (lambda (env ,@args) ,@body))
+ `(push (list ',name (lambda (env ,@args) (block ,name ,@body)))
*compilations*))
(define-compilation if (condition true false)
(concat "(function(){" *newline*
(indent "try {" *newline*
(indent "return " (ls-compile `(progn ,@body)
- (extend-lexenv b env 'block))) ";" *newline*
+ (extend-lexenv (list b) env 'block))
+ ";" *newline*)
"}" *newline*
"catch (cf){" *newline*
" if (cf.type == 'block' && cf.id == " tr ")" *newline*
"})})()")
(error (concat "Unknown block `" (symbol-name name) "'.")))))
+
+(define-compilation catch (id &rest body)
+ (concat "(function(){" *newline*
+ (indent "var id = " (ls-compile id env) ";" *newline*
+ "try {" *newline*
+ (indent "return " (ls-compile `(progn ,@body))
+ ";" *newline*)
+ "}" *newline*
+ "catch (cf){" *newline*
+ " if (cf.type == 'catch' && cf.id == id)" *newline*
+ " return cf.value;" *newline*
+ " else" *newline*
+ " throw cf;" *newline*
+ "}" *newline*)
+ "})()"))
+
+(define-compilation throw (id &optional value)
+ (concat "(function(){ throw ({"
+ "type: 'catch', "
+ "id: " (ls-compile id env) ", "
+ "value: " (ls-compile value env) ", "
+ "message: 'Throw uncatched.'"
+ "})})()"))
+
+
+(defvar *tagbody-counter* 0)
+(defvar *go-tag-counter* 0)
+
+(defun go-tag-p (x)
+ (or (integerp x) (symbolp x)))
+
+(defun declare-tagbody-tags (env tbidx body)
+ (let ((bindings
+ (mapcar (lambda (label)
+ (let ((tagidx (integer-to-string (incf *go-tag-counter*))))
+ (make-binding label 'gotag (list tbidx tagidx) t)))
+ (remove-if-not #'go-tag-p body))))
+ (extend-lexenv bindings env 'gotag)))
+
+(define-compilation tagbody (&rest body)
+ ;; Ignore the tagbody if it does not contain any go-tag. We do this
+ ;; because 1) it is easy and 2) many built-in forms expand to a
+ ;; implicit tagbody, so we save some space.
+ (unless (some #'go-tag-p body)
+ (return-from tagbody (ls-compile `(progn ,@body nil) env)))
+ ;; The translation assumes the first form in BODY is a label
+ (unless (go-tag-p (car body))
+ (push (gensym "START") body))
+ ;; Tagbody compilation
+ (let ((tbidx (integer-to-string *tagbody-counter*)))
+ (let ((env (declare-tagbody-tags env tbidx body))
+ initag)
+ (let ((b (lookup-in-lexenv (first body) env 'gotag)))
+ (setq initag (second (binding-translation b))))
+ (js!selfcall
+ "var tagbody_" tbidx " = " initag ";" *newline*
+ "tbloop:" *newline*
+ "while (true) {" *newline*
+ (indent "try {" *newline*
+ (indent (let ((content ""))
+ (concat "switch(tagbody_" tbidx "){" *newline*
+ "case " initag ":" *newline*
+ (dolist (form (cdr body) content)
+ (concatf content
+ (if (not (go-tag-p form))
+ (indent (ls-compile form env) ";" *newline*)
+ (let ((b (lookup-in-lexenv form env 'gotag)))
+ (concat "case " (second (binding-translation b)) ":" *newline*)))))
+ "default:" *newline*
+ " break tbloop;" *newline*
+ "}" *newline*)))
+ "}" *newline*
+ "catch (jump) {" *newline*
+ " if (jump.type == 'tagbody' && jump.id == " tbidx ")" *newline*
+ " tagbody_" tbidx " = jump.label;" *newline*
+ " else" *newline*
+ " throw(jump);" *newline*
+ "}" *newline*)
+ "}" *newline*
+ "return " (ls-compile nil) ";" *newline*))))
+
+(define-compilation go (label)
+ (let ((b (lookup-in-lexenv label env 'gotag))
+ (n (cond
+ ((symbolp label) (symbol-name label))
+ ((integerp label) (integer-to-string label)))))
+ (if b
+ (js!selfcall
+ (concat "throw ({"
+ "type: 'tagbody', "
+ "id: " (first (binding-translation b)) ", "
+ "label: " (second (binding-translation b)) ", "
+ "message: 'Attempt to GO to non-existing tag " n "'"
+ "})" *newline*))
+ (error (concat "Unknown tag `" n "'.")))))
+
+
+(define-compilation unwind-protect (form &rest clean-up)
+ (concat "(function(){" *newline*
+ (indent "var ret = " (ls-compile nil) ";" *newline*
+ "try {" *newline*
+ (indent "ret = " (ls-compile form env) ";" *newline*)
+ "} finally {" *newline*
+ (indent (ls-compile-block clean-up env))
+ "}" *newline*
+ "return ret;" *newline*)
+ "})()"))
+
+
;;; A little backquote implementation without optimizations of any
;;; kind for ecmalisp.
(defun backquote-expand-1 (form)
(js-eval
(concat "var lisp = {};"
"lisp.read = " (lookup-function-translation 'ls-read-from-string nil) ";" *newline*
- "lisp.print = " (lookup-function-translation 'print-to-string nil) ";" *newline*
+ "lisp.print = " (lookup-function-translation 'prin1-to-string nil) ";" *newline*
"lisp.eval = " (lookup-function-translation 'eval nil) ";" *newline*
"lisp.compile = " (lookup-function-translation 'ls-compile-toplevel nil) ";" *newline*
"lisp.evalString = function(str){" *newline*