;;; 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
'(lambda (name args &rest body)
`(eval-when-compile
(%compile-defmacro ',name
- '(lambda ,(mapcar (lambda (x)
+ '(lambda ,(mapcar (lambda (x)
(if (eq x '&body)
'&rest
x))
(defmacro named-lambda (name args &rest 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)
(defvar *package* (new))
- (defvar nil (make-symbol "NIL"))
- (set *package* "NIL" nil)
-
- (defvar t (make-symbol "T"))
- (set *package* "T" t)
+ (defvar nil 'nil)
+ (defvar t 't)
(defun null (x)
(eq x nil))
(defun intern (name)
(if (internp name)
- (get *package* name)
- (set *package* name (make-symbol name))))
+ (oget *package* name)
+ (oset *package* name (make-symbol name))))
(defun find-symbol (name)
- (get *package* name))
+ (oget *package* name))
(defvar *gensym-counter* 0)
(defun gensym (&optional (prefix "G"))
(,var nil))
(%while ,g!list
(setq ,var (car ,g!list))
- ,@body
+ (tagbody ,@body)
(setq ,g!list (cdr ,g!list)))
,(third iter)))))
(let ((,var 0)
(,g!to ,to))
(%while (< ,var ,g!to)
- ,@body
+ (tagbody ,@body)
(incf ,var))
,result))))
(let ((value (gensym)))
`(let ((,value ,form))
,@body
- ,value))))
+ ,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.
(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
""
(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)
((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>"))))
(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)))
(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)
(js!selfcall
"while(" (ls-compile pred env) " !== " (ls-compile nil) "){" *newline*
(define-builtin symbol-name (x)
(concat "(" x ").name"))
+(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 new () "{}")
-(define-builtin get (object key)
+(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)
(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)
(compile-funcall (car sexp) (cdr sexp) env))))))
(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-trailing
+ (remove-if (lambda (s) (or (null s) (equal s "")))
+ subs)
+ (concat ";" *newline*))))
+ (t
+ (setq *toplevel-compilations* nil)
+ (let ((code (ls-compile sexp)))
+ (prog1
+ (concat (join-trailing *toplevel-compilations*
+ (concat ";" *newline*))
+ code)
+ (setq *toplevel-compilations* nil))))))
;;; Once we have the compiler, we define the runtime environment and
(setq *function-counter* ',*function-counter*)
(setq *literal-counter* ',*literal-counter*)
(setq *gensym-counter* ',*gensym-counter*)
- (setq *block-counter* ',*block-counter*)))))
+ (setq *block-counter* ',*block-counter*)
+ ,@(mapcar (lambda (s)
+ `(oset *package* ,(symbol-name (car s))
+ (js-vref ,(cdr s))))
+ *literal-symbols*)))))
(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 '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*
- " return lisp.eval(lisp.read(str));" *newline*
- "}" *newline*
- "lisp.compileString = function(str){" *newline*
- " return lisp.compile(lisp.read(str));" *newline*
- "}" *newline*)))
+ (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)))))
;;; Finally, we provide a couple of functions to easily bootstrap
(defun bootstrap ()
(setq *environment* (make-lexenv))
+ (setq *literal-symbols* nil)
(setq *variable-counter* 0
*gensym-counter* 0
*function-counter* 0
projects / jscl.git / blobdiff