+
+(defun ls-read-from-string (string)
+ (ls-read (make-string-stream string)))
+
+
+;;;; Compiler
+
+(defvar *compilation-unit-checks* '())
+
+(defvar *env* '())
+(defvar *fenv* '())
+
+(defun make-binding (name type js declared)
+ (list name type js declared))
+
+(defun binding-name (b) (first b))
+(defun binding-type (b) (second b))
+(defun binding-translation (b) (third b))
+(defun binding-declared (b)
+ (and b (fourth b)))
+(defun mark-binding-as-declared (b)
+ (setcar (cdddr b) t))
+
+(defvar *variable-counter* 0)
+(defun gvarname (symbol)
+ (concat "v" (integer-to-string (incf *variable-counter*))))
+
+(defun lookup-variable (symbol env)
+ (or (assoc symbol env)
+ (assoc symbol *env*)
+ (let ((name (symbol-name symbol))
+ (binding (make-binding symbol 'variable (gvarname symbol) nil)))
+ (push binding *env*)
+ (push (lambda ()
+ (unless (binding-declared (assoc symbol *env*))
+ (error (concat "Undefined variable `" name "'"))))
+ *compilation-unit-checks*)
+ binding)))
+
+(defun lookup-variable-translation (symbol env)
+ (binding-translation (lookup-variable symbol env)))
+
+(defun extend-local-env (args env)
+ (append (mapcar (lambda (symbol)
+ (make-binding symbol 'variable (gvarname symbol) t))
+ args)
+ env))
+
+(defvar *function-counter* 0)
+(defun lookup-function (symbol env)
+ (or (assoc symbol env)
+ (assoc symbol *fenv*)
+ (let ((name (symbol-name symbol))
+ (binding
+ (make-binding symbol
+ 'function
+ (concat "f" (integer-to-string (incf *function-counter*)))
+ nil)))
+ (push binding *fenv*)
+ (push (lambda ()
+ (unless (binding-declared (assoc symbol *fenv*))
+ (error (concat "Undefined function `" name "'"))))
+ *compilation-unit-checks*)
+ binding)))
+
+(defun lookup-function-translation (symbol env)
+ (binding-translation (lookup-function symbol env)))
+
+
+(defvar *toplevel-compilations* nil)
+
+(defun %compile-defvar (name)
+ (let ((b (lookup-variable name *env*)))
+ (mark-binding-as-declared b)
+ (push (concat "var " (binding-translation b)) *toplevel-compilations*)))
+
+(defun %compile-defun (name)
+ (let ((b (lookup-function name *env*)))
+ (mark-binding-as-declared b)
+ (push (concat "var " (binding-translation b)) *toplevel-compilations*)))
+
+(defun %compile-defmacro (name lambda)
+ (push (make-binding name 'macro lambda t) *fenv*))
+
+
+(defvar *compilations* nil)
+
+(defun ls-compile-block (sexps env fenv)
+ (join-trailing
+ (remove nil (mapcar (lambda (x)
+ (ls-compile x env fenv))
+ sexps))
+ ";
+"))
+(defmacro define-compilation (name args &rest body)
+ ;; 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 fenv ,@args) ,@body))
+ *compilations*))
+
+(define-compilation if (condition true false)
+ (concat "("
+ (ls-compile condition env fenv) " !== " (ls-compile nil nil nil)
+ " ? "
+ (ls-compile true env fenv)
+ " : "
+ (ls-compile false env fenv)
+ ")"))
+
+;;; Return the required args of a lambda list
+(defun lambda-list-required-argument (lambda-list)
+ (if (or (null lambda-list) (eq (car lambda-list) '&rest))
+ nil
+ (cons (car lambda-list) (lambda-list-required-argument (cdr lambda-list)))))
+
+(defun lambda-list-rest-argument (lambda-list)
+ (second (member '&rest lambda-list)))
+
+(define-compilation lambda (lambda-list &rest body)
+ (let ((required-arguments (lambda-list-required-argument lambda-list))
+ (rest-argument (lambda-list-rest-argument lambda-list)))
+ (let ((new-env (extend-local-env
+ (append (and rest-argument (list rest-argument))
+ required-arguments)
+ env)))
+ (concat "(function ("
+ (join (mapcar (lambda (x)
+ (lookup-variable-translation x new-env))
+ required-arguments)
+ ",")
+ "){"
+ *newline*
+ (if rest-argument
+ (let ((js!rest (lookup-variable-translation rest-argument new-env)))
+ (concat "var " js!rest "= " (ls-compile nil env fenv) ";" *newline*
+ "for (var i = arguments.length-1; i>="
+ (integer-to-string (length required-arguments))
+ "; i--)" *newline*
+ js!rest " = "
+ "{car: arguments[i], cdr: " js!rest "};"
+ *newline*))
+ "")
+ (concat (ls-compile-block (butlast body) new-env fenv)
+ "return " (ls-compile (car (last body)) new-env fenv) ";")
+ *newline*
+ "})"))))
+
+(define-compilation fsetq (var val)
+ (concat (lookup-function-translation var fenv)
+ " = "
+ (ls-compile val env fenv)))
+
+(define-compilation setq (var val)
+ (concat (lookup-variable-translation var env)
+ " = "
+ (ls-compile val env fenv)))
+
+;;; Literals
+
+(defun escape-string (string)
+ (let ((output "")
+ (index 0)
+ (size (length string)))
+ (while (< index size)
+ (let ((ch (char string index)))
+ (when (or (char= ch #\") (char= ch #\\))
+ (setq output (concat output "\\")))
+ (when (or (char= ch #\newline))
+ (setq output (concat output "\\"))
+ (setq ch #\n))
+ (setq output (concat output (string ch))))
+ (incf index))
+ output))
+
+(defun literal->js (sexp)
+ (cond
+ ((integerp sexp) (integer-to-string sexp))
+ ((stringp sexp) (concat "\"" (escape-string sexp) "\""))
+ ((symbolp sexp) (ls-compile `(intern ,(escape-string (symbol-name sexp))) *env* *fenv*))
+ ((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))
+
+(define-compilation quote (sexp)
+ (literal sexp))
+
+(define-compilation debug (form)
+ (concat "console.log(" (ls-compile form env fenv) ")"))
+
+(define-compilation while (pred &rest body)
+ (concat "(function(){ while("
+ (ls-compile pred env fenv) " !== " (ls-compile nil nil nil)
+ "){"
+ (ls-compile-block body env fenv)
+ "}})()"))
+
+(define-compilation function (x)
+ (cond
+ ((and (listp x) (eq (car x) 'lambda))
+ (ls-compile x env fenv))
+ ((symbolp x)
+ (lookup-function-translation x fenv))))
+
+#+common-lisp
+c(defmacro eval-when-compile (&body body)
+ `(eval-when (:compile-toplevel :load-toplevel :execute)
+ ,@body))
+
+(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 fenv)))
+
+(define-transformation progn (&rest body)
+ `((lambda () ,@body)))
+
+(define-transformation let (bindings &rest body)
+ (let ((bindings (mapcar #'ensure-list bindings)))
+ `((lambda ,(mapcar 'car bindings) ,@body)
+ ,@(mapcar 'cadr bindings))))
+
+;;; A little backquote implementation without optimizations of any
+;;; kind for lispstrack.
+(defun backquote-expand-1 (form)
+ (cond
+ ((symbolp form)
+ (list 'quote form))
+ ((atom form)
+ form)
+ ((eq (car form) 'unquote)
+ (car form))
+ ((eq (car form) 'backquote)
+ (backquote-expand-1 (backquote-expand-1 (cadr form))))
+ (t
+ (cons 'append
+ (mapcar (lambda (s)
+ (cond
+ ((and (listp s) (eq (car s) 'unquote))
+ (list 'list (cadr s)))
+ ((and (listp s) (eq (car s) 'unquote-splicing))
+ (cadr s))
+ (t
+ (list 'list (backquote-expand-1 s)))))
+ form)))))
+
+(defun backquote-expand (form)
+ (if (and (listp form) (eq (car form) 'backquote))
+ (backquote-expand-1 (cadr form))
+ form))
+
+(defmacro backquote (form)
+ (backquote-expand-1 form))
+
+(define-transformation backquote (form)
+ (backquote-expand-1 form))
+
+;;; Primitives
+
+(defun compile-bool (x)
+ (concat "(" x "?" (ls-compile t nil nil) ": " (ls-compile nil nil nil) ")"))
+
+(define-compilation + (x y)
+ (concat "((" (ls-compile x env fenv) ") + (" (ls-compile y env fenv) "))"))
+
+(define-compilation - (x y)
+ (concat "((" (ls-compile x env fenv) ") - (" (ls-compile y env fenv) "))"))
+
+(define-compilation * (x y)
+ (concat "((" (ls-compile x env fenv) ") * (" (ls-compile y env fenv) "))"))
+
+(define-compilation / (x y)
+ (concat "((" (ls-compile x env fenv) ") / (" (ls-compile y env fenv) "))"))
+
+(define-compilation < (x y)
+ (compile-bool (concat "((" (ls-compile x env fenv) ") < (" (ls-compile y env fenv) "))")))
+
+(define-compilation = (x y)
+ (compile-bool (concat "((" (ls-compile x env fenv) ") == (" (ls-compile y env fenv) "))")))
+
+(define-compilation numberp (x)
+ (compile-bool (concat "(typeof (" (ls-compile x env fenv) ") == \"number\")")))
+
+
+(define-compilation mod (x y)
+ (concat "((" (ls-compile x env fenv) ") % (" (ls-compile y env fenv) "))"))
+
+(define-compilation floor (x)
+ (concat "(Math.floor(" (ls-compile x env fenv) "))"))
+
+(define-compilation null (x)
+ (compile-bool (concat "(" (ls-compile x env fenv) "===" (ls-compile nil env fenv) ")")))
+
+(define-compilation cons (x y)
+ (concat "{car: " (ls-compile x env fenv) ", cdr: " (ls-compile y env fenv) "}"))
+
+(define-compilation consp (x)
+ (compile-bool
+ (concat "(function(){ var tmp = "
+ (ls-compile x env fenv)
+ "; return (typeof tmp == 'object' && 'car' in tmp);})()")))
+
+(define-compilation car (x)
+ (concat "(function () { var tmp = " (ls-compile x env fenv)
+ "; return tmp === " (ls-compile nil nil nil) "? "
+ (ls-compile nil nil nil)
+ ": tmp.car; })()"))
+
+(define-compilation cdr (x)
+ (concat "(function () { var tmp = " (ls-compile x env fenv)
+ "; return tmp === " (ls-compile nil nil nil) "? "
+ (ls-compile nil nil nil)
+ ": tmp.cdr; })()"))
+
+(define-compilation setcar (x new)
+ (concat "((" (ls-compile x env fenv) ").car = " (ls-compile new env fenv) ")"))
+
+(define-compilation setcdr (x new)
+ (concat "((" (ls-compile x env fenv) ").cdr = " (ls-compile new env fenv) ")"))
+
+(define-compilation symbolp (x)
+ (compile-bool
+ (concat "(function(){ var tmp = "
+ (ls-compile x env fenv)
+ "; return (typeof tmp == 'object' && 'name' in tmp); })()")))
+
+(define-compilation make-symbol (name)
+ (concat "{name: " (ls-compile name env fenv) "}"))
+
+(define-compilation symbol-name (x)
+ (concat "(" (ls-compile x env fenv) ").name"))
+
+(define-compilation eq (x y)
+ (compile-bool
+ (concat "(" (ls-compile x env fenv) " === " (ls-compile y env fenv) ")")))
+
+(define-compilation equal (x y)
+ (compile-bool
+ (concat "(" (ls-compile x env fenv) " == " (ls-compile y env fenv) ")")))
+
+(define-compilation string (x)
+ (concat "String.fromCharCode(" (ls-compile x env fenv) ")"))
+
+(define-compilation stringp (x)
+ (compile-bool
+ (concat "(typeof(" (ls-compile x env fenv) ") == \"string\")")))
+
+(define-compilation string-upcase (x)
+ (concat "(" (ls-compile x env fenv) ").toUpperCase()"))
+
+(define-compilation string-length (x)
+ (concat "(" (ls-compile x env fenv) ").length"))
+
+(define-compilation char (string index)
+ (concat "("
+ (ls-compile string env fenv)
+ ").charCodeAt("
+ (ls-compile index env fenv)
+ ")"))
+
+(define-compilation concat-two (string1 string2)
+ (concat "("
+ (ls-compile string1 env fenv)
+ ").concat("
+ (ls-compile string2 env fenv)
+ ")"))
+
+(define-compilation funcall (func &rest args)
+ (concat "("
+ (ls-compile func env fenv)
+ ")("
+ (join (mapcar (lambda (x)
+ (ls-compile x env fenv))
+ args)
+ ", ")
+ ")"))
+
+(define-compilation apply (func &rest args)
+ (if (null args)
+ (concat "(" (ls-compile func env fenv) ")()")
+ (let ((args (butlast args))
+ (last (car (last args))))
+ (concat "(function(){" *newline*
+ "var f = " (ls-compile func env fenv) ";" *newline*
+ "var args = [" (join (mapcar (lambda (x)
+ (ls-compile x env fenv))
+ args)
+ ", ")
+ "];" *newline*
+ "var tail = (" (ls-compile last env fenv) ");" *newline*
+ "while (tail != " (ls-compile nil env fenv) "){" *newline*
+ " args.push(tail.car);" *newline*
+ " tail = tail.cdr;" *newline*
+ "}" *newline*
+ "return f.apply(this, args);" *newline*
+ "})()" *newline*))))
+
+(define-compilation js-eval (string)
+ (concat "eval(" (ls-compile string env fenv) ")"))
+
+
+(define-compilation error (string)
+ (concat "(function (){ throw " (ls-compile string env fenv) ";" "return 0;})()"))
+
+(define-compilation new ()
+ "{}")
+
+(define-compilation get (object key)
+ (concat "(function(){ var tmp = "
+ "(" (ls-compile object env fenv) ")[" (ls-compile key env fenv) "]"
+ ";"
+ "return tmp == undefined? " (ls-compile nil nil nil) ": tmp ;"
+ "})()"))
+
+(define-compilation set (object key value)
+ (concat "(("
+ (ls-compile object env fenv)
+ ")["
+ (ls-compile key env fenv) "]"
+ " = " (ls-compile value env fenv) ")"))
+
+(define-compilation in (key object)
+ (compile-bool
+ (concat "(" (ls-compile key env fenv) " in " (ls-compile object env fenv) ")")))
+
+
+(defun macrop (x)
+ (and (symbolp x) (eq (binding-type (lookup-function x *fenv*)) 'macro)))
+
+(defun ls-macroexpand-1 (form env fenv)
+ (when (macrop (car form))
+ (let ((binding (lookup-function (car form) *env*)))
+ (if (eq (binding-type binding) 'macro)
+ (apply (eval (binding-translation binding)) (cdr form))
+ form))))
+
+(defun compile-funcall (function args env fenv)
+ (cond
+ ((symbolp function)
+ (concat (lookup-function-translation function fenv)
+ "("
+ (join (mapcar (lambda (x) (ls-compile x env fenv)) args)
+ ", ")
+ ")"))
+ ((and (listp function) (eq (car function) 'lambda))
+ (concat "(" (ls-compile function env fenv) ")("
+ (join (mapcar (lambda (x) (ls-compile x env fenv)) args)
+ ", ")
+ ")"))
+ (t
+ (error (concat "Invalid function designator " (symbol-name function))))))
+
+(defun ls-compile (sexp env fenv)
+ (cond
+ ((symbolp sexp) (lookup-variable-translation sexp env))
+ ((integerp sexp) (integer-to-string sexp))
+ ((stringp sexp) (concat "\"" (escape-string sexp) "\""))
+ ((listp sexp)
+ (if (assoc (car sexp) *compilations*)
+ (let ((comp (second (assoc (car sexp) *compilations*))))
+ (apply comp env fenv (cdr sexp)))
+ (if (macrop (car sexp))
+ (ls-compile (ls-macroexpand-1 sexp env fenv) env fenv)
+ (compile-funcall (car sexp) (cdr sexp) env fenv))))))
+
+(defun ls-compile-toplevel (sexp)
+ (setq *toplevel-compilations* nil)
+ (let ((code (ls-compile sexp nil nil)))
+ (prog1
+ (concat #+common-lisp (concat "/* " (princ-to-string sexp) " */")
+ (join (mapcar (lambda (x) (concat x ";" *newline*))
+ *toplevel-compilations*)
+ "")
+ code)
+ (setq *toplevel-compilations* nil))))
+
+#+common-lisp
+(progn
+ (defun read-whole-file (filename)
+ (with-open-file (in filename)
+ (let ((seq (make-array (file-length in) :element-type 'character)))
+ (read-sequence seq in)
+ seq)))
+
+ (defun ls-compile-file (filename output)
+ (setq *env* nil *fenv* nil)
+ (setq *compilation-unit-checks* nil)
+ (with-open-file (out output :direction :output :if-exists :supersede)
+ (let* ((source (read-whole-file filename))
+ (in (make-string-stream source)))
+ (loop
+ for x = (ls-read in)
+ until (eq x *eof*)
+ for compilation = (ls-compile-toplevel x)
+ when (plusp (length compilation))
+ do (write-line (concat compilation "; ") out))
+ (dolist (check *compilation-unit-checks*)
+ (funcall check))
+ (setq *compilation-unit-checks* nil))))
+
+ (defun bootstrap ()
+ (ls-compile-file "lispstrack.lisp" "lispstrack.js")))
+
+;;; ----------------------------------------------------------
+
+(defmacro with-compilation-unit (&rest body)
+ `(prog1
+ (progn
+ (setq *compilation-unit-checks* nil)
+ (setq *env* (remove-if-not #'binding-declared *env*))
+ (setq *fenv* (remove-if-not #'binding-declared *fenv*))
+ ,@body)
+ (dolist (check *compilation-unit-checks*)
+ (funcall check))))
+
+(defun eval (x)
+ (let ((code
+ (with-compilation-unit
+ (ls-compile-toplevel x nil nil))))
+ (js-eval code)))
+
+
+;; Set the initial global environment to be equal to the host global
+;; environment at this point of the compilation.
+(eval-when-compile
+ (let ((c1 (ls-compile `(setq *fenv* ',*fenv*) nil nil))
+ (c2 (ls-compile `(setq *env* ',*env*) nil nil))
+ (c3 (ls-compile `(setq *variable-counter* ',*variable-counter*) nil nil))
+ (c4 (ls-compile `(setq *function-counter* ',*function-counter*) nil nil))
+ (c5 (ls-compile `(setq *literal-counter* ',*literal-counter*) nil nil)))
+ (setq *toplevel-compilations*
+ (append *toplevel-compilations* (list c1 c2 c3 c4 c5)))))
+
+(js-eval
+ (concat "var lisp = {};"
+ "lisp.read = " (lookup-function-translation 'ls-read-from-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*))
projects / jscl.git / blobdiff