;;; ecmalisp.lisp ---
-;; Copyright (C) 2012 David Vazquez
+;; Copyright (C) 2012, 2013 David Vazquez
;; Copyright (C) 2012 Raimon Grau
;; This program is free software: you can redistribute it and/or
;;; as well as funcalls and macroexpansion, but no functions. So, we
;;; define the Lisp world from scratch. This code has to define enough
;;; 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)))
-
- (defmacro defvar (name &optional value)
- `(%defvar ,name ,value))
-
- (defmacro named-lambda (name args &rest body)
+ (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)
+ ',name))
+
+ (defmacro named-lambda (name args &body body)
(let ((x (gensym "FN")))
`(let ((,x (lambda ,args ,@body)))
- (set ,x "fname" ,name)
+ (oset ,x "fname" ,name)
,x)))
- (defmacro %defun (name args &rest body)
+ (defmacro defun (name args &body body)
`(progn
(eval-when-compile
(%compile-defun ',name))
(fsetq ,name (named-lambda ,(symbol-name name) ,args
- ,@body))))
-
- (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 (value)
- `(return-from nil ,value))
-
- (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
+ (block ,name ,@body)))
+ ',name))
+
+ (defvar *package* (new))
+
+ (defvar nil 'nil)
+ (defvar 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)
+ (oget *package* name)
+ (oset *package* name (make-symbol name))))
+
+ (defun find-symbol (name)
+ (oget *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))
+ (tagbody ,@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)
+ (tagbody ,@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)))
+
+ (defmacro prog2 (form1 result &body body)
+ `(prog1 (progn ,form1 ,result) ,@body))
+
+ )
+
;;; This couple of helper functions will be defined in both Common
;;; Lisp and in Ecmalisp.
;;; constructions.
#+ecmalisp
(progn
- (defmacro defun (name args &body body)
- `(progn
- (%defun ,name ,args ,@body)
- ',name))
-
- (defmacro defvar (name &optional value)
- `(progn
- (%defvar ,name ,value)
- ',name))
-
(defun append-two (list1 list2)
(if (null list1)
list2
(defun append (&rest lists)
(!reduce #'append-two lists '()))
- (defun reverse-aux (list acc)
- (if (null list)
- acc
- (reverse-aux (cdr list) (cons (car list) acc))))
+ (defun revappend (list1 list2)
+ (while list1
+ (push (car list1) list2)
+ (setq list1 (cdr list1)))
+ list2)
(defun reverse (list)
- (reverse-aux list '()))
+ (revappend list '()))
(defun list-length (list)
(let ((l 0))
(defun listp (x)
(or (consp x) (null x)))
+ (defun nthcdr (n list)
+ (while (and (plusp n) list)
+ (setq n (1- n))
+ (setq list (cdr list)))
+ list)
+
(defun nth (n list)
- (cond
- ((null list) list)
- ((zerop n) (car list))
- (t (nth (1- n) (cdr list)))))
+ (car (nthcdr n list)))
(defun last (x)
- (if (consp (cdr x))
- (last (cdr x))
- x))
+ (while (consp (cdr x))
+ (setq x (cdr x)))
+ x)
(defun butlast (x)
(and (consp (cdr x))
(cons (car x) (butlast (cdr x)))))
(defun member (x list)
- (cond
- ((null list)
- nil)
- ((eql x (car list))
- list)
- (t
- (member x (cdr list)))))
+ (while list
+ (when (eql x (car list))
+ (return list))
+ (setq list (cdr list))))
(defun remove (x list)
(cond
(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 ((ret t)
- (index 0)
- (size (length seq)))
- (while (and ret (< index size))
- (unless (funcall function (char seq index))
- (setq ret nil))
- (incf index))
- ret))
+ (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)
- (let ((found nil))
- (while (and alist (not found))
- (if (eql x (caar alist))
- (setq found t)
- (setq alist (cdr alist))))
- (car alist)))
+ (while alist
+ (if (eql x (caar alist))
+ (return)
+ (setq alist (cdr alist))))
+ (car alist))
(defun string= (s1 s2)
(equal s1 s2)))
(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
""
(concat (car list) separator (join-trailing (cdr list) separator))))
-;;; Like CONCAT, but prefix each line with four spaces.
+(defun mapconcat (func list)
+ (join (mapcar func list)))
+
+;;; Like CONCAT, but prefix each line with four spaces. Two versions
+;;; of this function are available, because the Ecmalisp version is
+;;; very slow and bootstraping was annoying.
+
+#+ecmalisp
(defun indent (&rest string)
(let ((input (join string)))
(let ((output "")
(index 0)
(size (length input)))
- (when (plusp size)
- (setq output " "))
+ (when (plusp (length input)) (concatf output " "))
(while (< index size)
- (setq output
- (concat output
- (if (and (char= (char input index) #\newline)
- (< index (1- size))
- (not (char= (char input (1+ index)) #\newline)))
- (concat (string #\newline) " ")
- (subseq input index (1+ index)))))
+ (let ((str
+ (if (and (char= (char input index) #\newline)
+ (< index (1- size))
+ (not (char= (char input (1+ index)) #\newline)))
+ (concat (string #\newline) " ")
+ (string (char input index)))))
+ (concatf output str))
(incf index))
output)))
+#+common-lisp
+(defun indent (&rest string)
+ (with-output-to-string (*standard-output*)
+ (with-input-from-string (input (join string))
+ (loop
+ for line = (read-line input nil)
+ while line
+ do (write-string " ")
+ do (write-line line)))))
+
+
(defun integer-to-string (x)
(cond
((zerop x)
(join (mapcar (lambda (d) (string (char "0123456789" d)))
digits))))))
+
+;;; Wrap X with a Javascript code to convert the result from
+;;; Javascript generalized booleans to T or NIL.
+(defun js!bool (x)
+ (concat "(" x "?" (ls-compile t) ": " (ls-compile nil) ")"))
+
+;;; Concatenate the arguments and wrap them with a self-calling
+;;; Javascript anonymous function. It is used to make some Javascript
+;;; statements valid expressions and provide a private scope as well.
+;;; It could be defined as function, but we could do some
+;;; preprocessing in the future.
+(defmacro js!selfcall (&body body)
+ `(concat "(function(){" *newline* (indent ,@body) "})()"))
+
+
;;; 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))
((stringp form) (concat "\"" (escape-string form) "\""))
((functionp form)
- (let ((name (get form "fname")))
+ (let ((name (oget form "fname")))
(if name
(concat "#<FUNCTION " name ">")
(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))
(defun clear-undeclared-global-bindings ()
- (let ((variables (first *environment*))
- (functions (second *environment*)))
- (setq *environment* (list variables functions (third *environment*)))))
+ (setq *environment*
+ (mapcar (lambda (namespace)
+ (remove-if-not #'binding-declared namespace))
+ *environment*)))
(defvar *variable-counter* 0)
(or (lookup-in-lexenv symbol env 'variable)
(lookup-in-lexenv symbol *environment* 'variable)
(let ((name (symbol-name symbol))
- (binding (make-binding symbol 'variable (gvarname symbol) nil)))
+ (binding (make-binding symbol 'special-variable (gvarname symbol) nil)))
(push-to-lexenv binding *environment* 'variable)
(push (lambda ()
- (unless (lookup-in-lexenv symbol *environment* 'variable)
- (error (concat "Undefined variable `" name "'"))))
+ (let ((b (lookup-in-lexenv symbol *environment* 'variable)))
+ (unless (binding-declared b)
+ (error (concat "Undefined variable `" name "'")))))
*compilation-unit-checks*)
binding)))
(defun extend-local-env (args env)
(let ((new (copy-lexenv env)))
(dolist (symbol args new)
- (let ((b (make-binding symbol 'variable (gvarname symbol) t)))
+ (let ((b (make-binding symbol 'lexical-variable (gvarname symbol) t)))
(push-to-lexenv b new 'variable)))))
(defvar *function-counter* 0)
nil)))
(push-to-lexenv binding *environment* 'function)
(push (lambda ()
- (unless (binding-declared (lookup-in-lexenv symbol *environment* 'function))
- (error (concat "Undefined function `" name "'"))))
+ (let ((b (lookup-in-lexenv symbol *environment* 'function)))
+ (unless (binding-declared b)
+ (error (concat "Undefined function `" name "'")))))
*compilation-unit-checks*)
binding)))
(defun ls-compile-block (sexps env)
(join-trailing
- (remove-if (lambda (x)
- (or (null x)
- (and (stringp x)
- (zerop (length x)))))
+ (remove-if #'null
(mapcar (lambda (x) (ls-compile x env)) sexps))
(concat ";" *newline*)))
;; 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)
(ls-compile val env)))
(define-compilation setq (var val)
- (concat (lookup-variable-translation var env)
- " = "
- (ls-compile val env)))
+ (let ((b (lookup-variable var env)))
+ (ecase (binding-type b)
+ (lexical-variable (concat (binding-translation b) " = " (ls-compile val env)))
+ (special-variable (ls-compile `(set ',var ,val) env)))))
+
+;;; FFI Variable accessors
+(define-compilation js-vref (var)
+ var)
+(define-compilation js-vset (var val)
+ (concat "(" var " = " (ls-compile val env) ")"))
+
;;; Literals
(defun escape-string (string)
(incf index))
output))
-(defun literal->js (sexp)
+
+(defvar *literal-symbols* nil)
+(defvar *literal-counter* 0)
+
+(defun genlit ()
+ (concat "l" (integer-to-string (incf *literal-counter*))))
+
+(defun literal (sexp &optional recursive)
(cond
((integerp sexp) (integer-to-string sexp))
((stringp sexp) (concat "\"" (escape-string sexp) "\""))
- ((symbolp sexp) (ls-compile `(intern ,(escape-string (symbol-name sexp))) *environment*))
- ((consp sexp) (concat "{car: "
- (literal->js (car sexp))
- ", cdr: "
- (literal->js (cdr sexp)) "}"))))
-
-(defvar *literal-counter* 0)
-(defun literal (form)
- (let ((var (concat "l" (integer-to-string (incf *literal-counter*)))))
- (push (concat "var " var " = " (literal->js form)) *toplevel-compilations*)
- var))
+ ((symbolp sexp)
+ #+common-lisp
+ (or (cdr (assoc sexp *literal-symbols*))
+ (let ((v (genlit))
+ (s (concat "{name: \"" (escape-string (symbol-name sexp)) "\"}")))
+ (push (cons sexp v) *literal-symbols*)
+ (push (concat "var " v " = " s) *toplevel-compilations*)
+ v))
+ #+ecmalisp
+ (let ((v (genlit)))
+ (push (concat "var " v " = " (ls-compile `(intern ,(symbol-name sexp))))
+ *toplevel-compilations*)
+ v))
+ ((consp sexp)
+ (let ((c (concat "{car: " (literal (car sexp) t) ", "
+ "cdr: " (literal (cdr sexp) t) "}")))
+ (if recursive
+ c
+ (let ((v (genlit)))
+ (push (concat "var " v " = " c) *toplevel-compilations*)
+ v))))))
(define-compilation quote (sexp)
(literal sexp))
-(define-compilation while (pred &rest body)
- (concat "(function(){" *newline*
- (indent "while("
- (ls-compile pred env)
- " !== "
- (ls-compile nil) "){" *newline*
- (indent (ls-compile-block body env)))
- "}})()"))
+
+(define-compilation %while (pred &rest body)
+ (js!selfcall
+ "while(" (ls-compile pred env) " !== " (ls-compile nil) "){" *newline*
+ (indent (ls-compile-block body env))
+ "}"
+ "return " (ls-compile nil) ";" *newline*))
(define-compilation function (x)
(cond
(define-compilation eval-when-compile (&rest body)
(eval (cons 'progn body))
- "")
+ nil)
(defmacro define-transformation (name args form)
`(define-compilation ,name ,args
(ls-compile ,form env)))
(define-compilation progn (&rest body)
- (concat "(function(){" *newline*
- (indent (ls-compile-block (butlast body) env)
- "return " (ls-compile (car (last body)) env) ";" *newline*)
- "})()"))
+ (js!selfcall
+ (ls-compile-block (butlast body) env)
+ "return " (ls-compile (car (last body)) env) ";" *newline*))
(define-compilation let (bindings &rest body)
(let ((bindings (mapcar #'ensure-list bindings)))
(define-compilation block (name &rest body)
(let ((tr (integer-to-string (incf *block-counter*))))
(let ((b (make-binding name 'block tr t)))
- (concat "(function(){" *newline*
- (indent "try {" *newline*
- (indent "return " (ls-compile `(progn ,@body)
- (extend-lexenv b env 'block))) ";" *newline*
- "}" *newline*
- "catch (cf){" *newline*
- " if (cf.type == 'block' && cf.id == " tr ")" *newline*
- " return cf.value;" *newline*
- " else" *newline*
- " throw cf;" *newline*
- "}" *newline*)
- "})()" *newline*))))
+ (js!selfcall
+ "try {" *newline*
+ (indent "return " (ls-compile `(progn ,@body)
+ (extend-lexenv (list b) env 'block))
+ ";" *newline*)
+ "}" *newline*
+ "catch (cf){" *newline*
+ " if (cf.type == 'block' && cf.id == " tr ")" *newline*
+ " return cf.value;" *newline*
+ " else" *newline*
+ " throw cf;" *newline*
+ "}" *newline*))))
(define-compilation return-from (name &optional value)
(let ((b (lookup-in-lexenv name env 'block)))
(if b
- (concat "(function(){ throw ({"
- "type: 'block', "
- "id: " (binding-translation b) ", "
- "value: " (ls-compile value env) ", "
- "message: 'Return from unknown block " (symbol-name name) ".'"
- "})})()")
+ (js!selfcall
+ "throw ({"
+ "type: 'block', "
+ "id: " (binding-translation b) ", "
+ "value: " (ls-compile value env) ", "
+ "message: 'Return from unknown block " (symbol-name name) ".'"
+ "})")
(error (concat "Unknown block `" (symbol-name name) "'.")))))
+
+(define-compilation catch (id &rest body)
+ (js!selfcall
+ "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)
+ (js!selfcall
+ "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
+ "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)
+ (js!selfcall
+ "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)
(let ,(mapcar (lambda (arg) `(,arg (ls-compile ,arg env))) args)
,@body)))
-(defun compile-bool (x)
- (concat "(" x "?" (ls-compile t) ": " (ls-compile nil) ")"))
-
;;; DECLS is a list of (JSVARNAME TYPE LISPFORM) declarations.
(defmacro type-check (decls &body body)
- `(concat "(function(){" *newline*
- (indent ,@(mapcar (lambda (decl)
- `(concat "var " ,(first decl) " = " ,(third decl) ";" *newline*))
- decls)
-
- ,@(mapcar (lambda (decl)
- `(concat "if (typeof " ,(first decl) " != '" ,(second decl) "')" *newline*
- (indent "throw 'The value ' + "
- ,(first decl)
- " + ' is not a type "
- ,(second decl)
- ".';"
- *newline*)))
- decls)
- (concat "return " (progn ,@body) ";" *newline*))
- "})()"))
+ `(js!selfcall
+ ,@(mapcar (lambda (decl)
+ `(concat "var " ,(first decl) " = " ,(third decl) ";" *newline*))
+ decls)
+ ,@(mapcar (lambda (decl)
+ `(concat "if (typeof " ,(first decl) " != '" ,(second decl) "')" *newline*
+ (indent "throw 'The value ' + "
+ ,(first decl)
+ " + ' is not a type "
+ ,(second decl)
+ ".';"
+ *newline*)))
+ decls)
+ (concat "return " (progn ,@body) ";" *newline*)))
(defun num-op-num (x op y)
(type-check (("x" "number" x) ("y" "number" y))
(define-builtin mod (x y) (num-op-num x "%" y))
-(define-builtin < (x y) (compile-bool (num-op-num x "<" y)))
-(define-builtin > (x y) (compile-bool (num-op-num x ">" y)))
-(define-builtin = (x y) (compile-bool (num-op-num x "==" y)))
-(define-builtin <= (x y) (compile-bool (num-op-num x "<=" y)))
-(define-builtin >= (x y) (compile-bool (num-op-num x ">=" y)))
+(define-builtin < (x y) (js!bool (num-op-num x "<" y)))
+(define-builtin > (x y) (js!bool (num-op-num x ">" y)))
+(define-builtin = (x y) (js!bool (num-op-num x "==" y)))
+(define-builtin <= (x y) (js!bool (num-op-num x "<=" y)))
+(define-builtin >= (x y) (js!bool (num-op-num x ">=" y)))
(define-builtin numberp (x)
- (compile-bool (concat "(typeof (" x ") == \"number\")")))
+ (js!bool (concat "(typeof (" x ") == \"number\")")))
(define-builtin floor (x)
(type-check (("x" "number" x))
"Math.floor(x)"))
-(define-builtin cons (x y) (concat "({car: " x ", cdr: " y "})"))
+(define-builtin cons (x y)
+ (concat "({car: " x ", cdr: " y "})"))
+
(define-builtin consp (x)
- (compile-bool
- (concat "(function(){" *newline*
- (indent "var tmp = " x ";" *newline*
- "return (typeof tmp == 'object' && 'car' in tmp);" *newline*)
- "})()")))
+ (js!bool
+ (js!selfcall
+ "var tmp = " x ";" *newline*
+ "return (typeof tmp == 'object' && 'car' in tmp);" *newline*)))
(define-builtin car (x)
- (concat "(function(){" *newline*
- (indent "var tmp = " x ";" *newline*
- "return tmp === " (ls-compile nil)
- "? " (ls-compile nil)
- ": tmp.car;" *newline*)
- "})()"))
+ (js!selfcall
+ "var tmp = " x ";" *newline*
+ "return tmp === " (ls-compile nil)
+ "? " (ls-compile nil)
+ ": tmp.car;" *newline*))
(define-builtin cdr (x)
- (concat "(function(){" *newline*
- (indent "var tmp = " x ";" *newline*
- "return tmp === " (ls-compile nil) "? "
- (ls-compile nil)
- ": tmp.cdr;" *newline*)
- "})()"))
+ (js!selfcall
+ "var tmp = " x ";" *newline*
+ "return tmp === " (ls-compile nil) "? "
+ (ls-compile nil)
+ ": tmp.cdr;" *newline*))
(define-builtin setcar (x new)
(type-check (("x" "object" x))
(concat "(x.cdr = " new ")")))
(define-builtin symbolp (x)
- (compile-bool
- (concat "(function(){" *newline*
- (indent "var tmp = " x ";" *newline*
- "return (typeof tmp == 'object' && 'name' in tmp);" *newline*)
- "})()")))
+ (js!bool
+ (js!selfcall
+ "var tmp = " x ";" *newline*
+ "return (typeof tmp == 'object' && 'name' in tmp);" *newline*)))
(define-builtin make-symbol (name)
(type-check (("name" "string" name))
(define-builtin symbol-name (x)
(concat "(" x ").name"))
-(define-builtin eq (x y) (compile-bool (concat "(" x " === " y ")")))
-(define-builtin equal (x y) (compile-bool (concat "(" x " == " y ")")))
+(define-builtin set (symbol value)
+ (concat "(" symbol ").value =" value))
+
+(define-builtin symbol-value (x)
+ (concat "(" x ").value"))
+
+(define-builtin symbol-function (x)
+ (concat "(" x ").function"))
+
+(define-builtin eq (x y) (js!bool (concat "(" x " === " y ")")))
+(define-builtin equal (x y) (js!bool (concat "(" x " == " y ")")))
(define-builtin string (x)
(type-check (("x" "number" x))
"String.fromCharCode(x)"))
(define-builtin stringp (x)
- (compile-bool (concat "(typeof(" x ") == \"string\")")))
+ (js!bool (concat "(typeof(" x ") == \"string\")")))
(define-builtin string-upcase (x)
(type-check (("x" "string" x))
"x.length"))
(define-compilation slice (string a &optional b)
- (concat "(function(){" *newline*
- (indent "var str = " (ls-compile string env) ";" *newline*
- "var a = " (ls-compile a env) ";" *newline*
- "var b;" *newline*
- (if b
- (concat "b = " (ls-compile b env) ";" *newline*)
- "")
- "return str.slice(a,b);" *newline*)
- "})()"))
+ (js!selfcall
+ "var str = " (ls-compile string env) ";" *newline*
+ "var a = " (ls-compile a env) ";" *newline*
+ "var b;" *newline*
+ (if b
+ (concat "b = " (ls-compile b env) ";" *newline*)
+ "")
+ "return str.slice(a,b);" *newline*))
(define-builtin char (string index)
(type-check (("string" "string" string)
(concat "(" (ls-compile func env) ")()")
(let ((args (butlast args))
(last (car (last args))))
- (concat "(function(){" *newline*
- (indent "var f = " (ls-compile func env) ";" *newline*
- "var args = [" (join (mapcar (lambda (x)
- (ls-compile x env))
- args)
- ", ")
- "];" *newline*
- "var tail = (" (ls-compile last env) ");" *newline*
- (indent "while (tail != " (ls-compile nil) "){" *newline*
- " args.push(tail.car);" *newline*
- " tail = tail.cdr;" *newline*
- "}" *newline*
- "return f.apply(this, args);" *newline*)
- "})()")))))
+ (js!selfcall
+ "var f = " (ls-compile func env) ";" *newline*
+ "var args = [" (join (mapcar (lambda (x)
+ (ls-compile x env))
+ args)
+ ", ")
+ "];" *newline*
+ "var tail = (" (ls-compile last env) ");" *newline*
+ "while (tail != " (ls-compile nil) "){" *newline*
+ " args.push(tail.car);" *newline*
+ " tail = tail.cdr;" *newline*
+ "}" *newline*
+ "return f.apply(this, args);" *newline*))))
(define-builtin js-eval (string)
(type-check (("string" "string" string))
"eval.apply(window, [string])"))
(define-builtin error (string)
- (concat "(function (){ throw " string "; })()"))
+ (js!selfcall "throw " string ";" *newline*))
(define-builtin new () "{}")
-(define-builtin get (object key)
- (concat "(function(){" *newline*
- (indent "var tmp = " "(" object ")[" key "];" *newline*
- "return tmp == undefined? " (ls-compile nil) ": tmp ;" *newline*)
- "})()"))
+(define-builtin oget (object key)
+ (js!selfcall
+ "var tmp = " "(" object ")[" key "];" *newline*
+ "return tmp == undefined? " (ls-compile nil) ": tmp ;" *newline*))
-(define-builtin set (object key value)
+(define-builtin oset (object key value)
(concat "((" object ")[" key "] = " value ")"))
(define-builtin in (key object)
- (compile-bool (concat "((" key ") in (" object "))")))
+ (js!bool (concat "((" key ") in (" object "))")))
(define-builtin functionp (x)
- (compile-bool (concat "(typeof " x " == 'function')")))
+ (js!bool (concat "(typeof " x " == 'function')")))
(define-builtin write-string (x)
(type-check (("x" "string" x))
(defun ls-compile (sexp &optional (env (make-lexenv)))
(cond
- ((symbolp sexp) (lookup-variable-translation sexp env))
+ ((symbolp sexp)
+ (let ((b (lookup-variable sexp env)))
+ (ecase (binding-type b)
+ (lexical-variable
+ (binding-translation b))
+ (special-variable
+ (ls-compile `(symbol-value ',sexp) env)))))
((integerp sexp) (integer-to-string sexp))
((stringp sexp) (concat "\"" (escape-string sexp) "\""))
((listp sexp)
(ls-compile (ls-macroexpand-1 sexp env) env)
(compile-funcall (car sexp) (cdr sexp) env))))))
+(defun null-or-empty-p (x)
+ (zerop (length x)))
+
(defun ls-compile-toplevel (sexp)
(setq *toplevel-compilations* nil)
- (let ((code (ls-compile sexp)))
- (prog1
- (concat (join (mapcar (lambda (x) (concat x ";" *newline*))
- *toplevel-compilations*))
- code)
- (setq *toplevel-compilations* nil))))
+ (cond
+ ((and (consp sexp) (eq (car sexp) 'progn))
+ (let ((subs (mapcar #'ls-compile-toplevel (cdr sexp))))
+ (join (remove-if #'null-or-empty-p subs))))
+ (t
+ (let ((code (ls-compile sexp)))
+ (prog1
+ (concat (join-trailing (remove-if #'null-or-empty-p *toplevel-compilations*)
+ (concat ";" *newline*))
+ (if code
+ (concat code ";" *newline*)
+ ""))
+ (setq *toplevel-compilations* nil))))))
;;; Once we have the compiler, we define the runtime environment and
(ls-compile-toplevel x))))
(js-eval code)))
+ (js-eval "var lisp")
+ (js-vset "lisp" (new))
+ (js-vset "lisp.read" #'ls-read-from-string)
+ (js-vset "lisp.print" #'prin1-to-string)
+ (js-vset "lisp.eval" #'eval)
+ (js-vset "lisp.compile" #'ls-compile-toplevel)
+ (js-vset "lisp.evalString" (lambda (str) (eval (ls-read-from-string str))))
+ (js-vset "lisp.compileString" (lambda (str) (ls-compile-toplevel (ls-read-from-string str))))
+
;; Set the initial global environment to be equal to the host global
;; environment at this point of the compilation.
(eval-when-compile
(let ((tmp (ls-compile
`(progn
+ ,@(mapcar (lambda (s)
+ `(oset *package* ,(symbol-name (car s))
+ (js-vref ,(cdr s))))
+ *literal-symbols*)
(setq *environment* ',*environment*)
- (setq *variable-counter* ',*variable-counter*)
- (setq *function-counter* ',*function-counter*)
- (setq *literal-counter* ',*literal-counter*)
- (setq *gensym-counter* ',*gensym-counter*)
- (setq *block-counter* ',*block-counter*)))))
+ (setq *variable-counter* ,*variable-counter*)
+ (setq *function-counter* ,*function-counter*)
+ (setq *gensym-counter* ,*gensym-counter*)
+ (setq *block-counter* ,*block-counter*)))))
(setq *toplevel-compilations*
(append *toplevel-compilations* (list tmp)))))
-
- (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.eval = " (lookup-function-translation 'eval nil) ";" *newline*
- "lisp.compile = " (lookup-function-translation 'ls-compile-toplevel nil) ";" *newline*
- "lisp.evalString = function(str){" *newline*
- " return lisp.eval(lisp.read(str));" *newline*
- "}" *newline*
- "lisp.compileString = function(str){" *newline*
- " return lisp.compile(lisp.read(str));" *newline*
- "}" *newline*)))
+ ;; KLUDGE:
+ (eval-when-compile
+ (let ((tmp (ls-compile
+ `(setq *literal-counter* ,*literal-counter*))))
+ (setq *toplevel-compilations*
+ (append *toplevel-compilations* (list tmp))))))
;;; Finally, we provide a couple of functions to easily bootstrap
until (eq x *eof*)
for compilation = (ls-compile-toplevel x)
when (plusp (length compilation))
- do (write-line (concat compilation "; ") out))
+ do (write-string compilation out))
(dolist (check *compilation-unit-checks*)
(funcall check))
(setq *compilation-unit-checks* nil))))
(defun bootstrap ()
(setq *environment* (make-lexenv))
+ (setq *literal-symbols* nil)
(setq *variable-counter* 0
*gensym-counter* 0
*function-counter* 0
projects / jscl.git / blobdiff