;;; 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))
+ (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 declaim (&rest decls)
+ `(eval-when-compile
+ ,@(mapcar (lambda (decl) `(!proclaim ',decl)) decls)))
+
+ (declaim (constant nil t))
+ (setq nil 'nil)
+ (setq t 't)
+
+ (defmacro when (condition &body body)
+ `(if ,condition (progn ,@body) nil))
+
+ (defmacro unless (condition &body body)
+ `(if ,condition nil (progn ,@body)))
+
+ (defmacro defvar (name value &optional docstring)
+ `(progn
+ (unless (boundp ',name) (setq ,name ,value))
+ ,@(when (stringp docstring) `((oset ',name "vardoc" ,docstring)))
+ ',name))
+
+ (defmacro defparameter (name value &optional docstring)
+ `(progn
+ (setq ,name ,value)
+ ,@(when (stringp docstring) `((oset ',name "vardoc" ,docstring)))
+ ',name))
(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)
+ (defmacro defun (name args &rest body)
`(progn
- (eval-when-compile
- (%compile-defun ',name))
- (fsetq ,name (named-lambda ,(symbol-name name) ,args
- ,@body))))
+ (declaim (non-overridable ,name))
+ (fset ',name
+ (named-lambda ,(symbol-name name) ,args
+ ,@(if (and (stringp (car body)) (not (null (cdr body))))
+ `(,(car body) (block ,name ,@(cdr body)))
+ `((block ,name ,@body)))))
+ ',name))
- (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))
-
- (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
+ (defun null (x)
+ (eq x nil))
+
+ (defmacro return (&optional value)
+ `(return-from nil ,value))
+
+ (defmacro while (condition &body body)
+ `(block nil (%while ,condition ,@body)))
+
+ (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*))))
+
+ (defun boundp (x)
+ (boundp x))
+
+ ;; 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)
+ "Return the CAR part of a cons, or NIL if X is null."
+ (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))))))
-
- (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 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))
(cons (funcall func (car list))
(mapcar func (cdr list)))))
+ (defun identity (x) x)
+
+ (defun copy-list (x)
+ (mapcar #'identity x))
+
(defun code-char (x) x)
(defun char-code (x) x)
(defun char= (x y) (= x y))
(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 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))
+ (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 assoc (x alist)
+ (defun every (function seq)
(cond
- ((null alist)
- nil)
- ((eql x (caar alist))
- (car alist))
+ ((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
- (assoc x (cdr alist)))))
+ (error "Unknown sequence."))))
+
+ (defun assoc (x alist)
+ (while alist
+ (if (eql x (caar alist))
+ (return)
+ (setq alist (cdr alist))))
+ (car alist))
+
+ (defun string (x)
+ (cond ((stringp x) x)
+ ((symbolp x) (symbol-name x))
+ (t (char-to-string x))))
(defun string= (s1 s2)
- (equal s1 s2)))
+ (equal s1 s2))
+
+ (defun fdefinition (x)
+ (cond
+ ((functionp x)
+ x)
+ ((symbolp x)
+ (symbol-function x))
+ (t
+ (error "Invalid function"))))
+
+ (defun disassemble (function)
+ (write-line (lambda-code (fdefinition function)))
+ nil)
+
+ (defun documentation (x type)
+ "Return the documentation of X. TYPE must be the symbol VARIABLE or FUNCTION."
+ (ecase type
+ (function
+ (let ((func (fdefinition x)))
+ (oget func "docstring")))
+ (variable
+ (unless (symbolp x)
+ (error "Wrong argument type! it should be a symbol"))
+ (oget x "vardoc"))))
+
+ ;; Packages
+
+ (defvar *package-list* nil)
+
+ (defun make-package (name &optional use)
+ (let ((package (new))
+ (use (mapcar #'find-package-or-fail use)))
+ (oset package "packageName" name)
+ (oset package "symbols" (new))
+ (oset package "exports" (new))
+ (oset package "use" use)
+ (push package *package-list*)
+ package))
+
+ (defun packagep (x)
+ (and (objectp x) (in "symbols" x)))
+
+ (defun find-package (package-designator)
+ (when (packagep package-designator)
+ (return-from find-package package-designator))
+ (let ((name (string package-designator)))
+ (dolist (package *package-list*)
+ (when (string= (package-name package) name)
+ (return package)))))
+
+ (defun find-package-or-fail (package-designator)
+ (or (find-package package-designator)
+ (error "Package unknown.")))
+
+ (defun package-name (package-designator)
+ (let ((package (find-package-or-fail package-designator)))
+ (oget package "packageName")))
+
+ (defun %package-symbols (package-designator)
+ (let ((package (find-package-or-fail package-designator)))
+ (oget package "symbols")))
+
+ (defun package-use-list (package-designator)
+ (let ((package (find-package-or-fail package-designator)))
+ (oget package "use")))
+
+ (defun %package-external-symbols (package-designator)
+ (let ((package (find-package-or-fail package-designator)))
+ (oget package "exports")))
+
+ (defvar *common-lisp-package*
+ (make-package "CL"))
+
+ (defvar *user-package*
+ (make-package "CL-USER" (list *common-lisp-package*)))
+
+ (defvar *package* *common-lisp-package*)
+
+ (defmacro in-package (package-designator)
+ `(eval-when-compile
+ (setq *package* (find-package-or-fail ,package-designator))))
+
+ ;; This function is used internally to initialize the CL package
+ ;; with the symbols built during bootstrap.
+ (defun %intern-symbol (symbol)
+ (let ((symbols (%package-symbols *common-lisp-package*)))
+ (oset symbol "package" *common-lisp-package*)
+ (oset symbols (symbol-name symbol) symbol)))
+
+ (defun %find-symbol (name package)
+ (let ((package (find-package-or-fail package)))
+ (let ((symbols (%package-symbols package)))
+ (if (in name symbols)
+ (cons (oget symbols name) t)
+ (dolist (used (package-use-list package) (cons nil nil))
+ (let ((exports (%package-external-symbols used)))
+ (when (in name exports)
+ (return-from %find-symbol
+ (cons (oget exports name) t)))))))))
+
+ (defun find-symbol (name &optional (package *package*))
+ (car (%find-symbol name package)))
+
+ (defun intern (name &optional (package *package*))
+ (let ((result (%find-symbol name package)))
+ (if (cdr result)
+ (car result)
+ (let ((symbols (%package-symbols package)))
+ (oget symbols name)
+ (let ((symbol (make-symbol name)))
+ (oset symbol "package" package)
+ (oset symbols name symbol))))))
+
+ (defun symbol-package (symbol)
+ (unless (symbolp symbol)
+ (error "it is not a symbol"))
+ (oget symbol "package"))
+
+ (defun export (symbols &optional (package *package*))
+ (let ((exports (%package-external-symbols package)))
+ (dolist (symb symbols t)
+ (oset exports (symbol-name symb) symb)))))
;;; The compiler offers some primitives and special forms which are
(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 (!reduce #'concat 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)))))
+ ")"))
+ ((packagep form)
+ (concat "#<PACKAGE " (package-name form) ">"))))
(defun write-line (x)
(write-string x)
(write-string *newline*)
x)
+ (defun warn (string)
+ (write-string "WARNING: ")
+ (write-line string))
+
(defun print (x)
- (write-line (print-to-string x))))
+ (write-line (prin1-to-string x))
+ x))
;;;; Reader
(t
(error "Unknown reader form.")))))))
-(defvar *eof* (make-symbol "EOF"))
+;;; Parse a string of the form NAME, PACKAGE:NAME or
+;;; PACKAGE::NAME and return the name. If the string is of the
+;;; form 1) or 3), but the symbol does not exist, it will be created
+;;; and interned in that package.
+(defun read-symbol (string)
+ (let ((size (length string))
+ package name internalp index)
+ (setq index 0)
+ (while (and (< index size)
+ (not (char= (char string index) #\:)))
+ (incf index))
+ (cond
+ ;; No package prefix
+ ((= index size)
+ (setq name string)
+ (setq package *package*)
+ (setq internalp t))
+ (t
+ ;; Package prefix
+ (if (zerop index)
+ (setq package "KEYWORD")
+ (setq package (string-upcase (subseq string 0 index))))
+ (incf index)
+ (when (char= (char string index) #\:)
+ (setq internalp t)
+ (incf index))
+ (setq name (subseq string index))))
+ ;; Canonalize symbol name and package
+ (setq name (string-upcase name))
+ (setq package (find-package package))
+ ;; TODO: PACKAGE:SYMBOL should signal error if SYMBOL is not an
+ ;; external symbol from PACKAGE.
+ (if internalp
+ (intern name package)
+ (find-symbol name package))))
+
+(defvar *eof* (gensym))
(defun ls-read (stream)
(skip-whitespaces-and-comments stream)
(let ((ch (%peek-char stream)))
(cond
- ((null ch)
+ ((or (null ch) (char= ch #\)))
*eof*)
((char= ch #\()
(%read-char stream)
(let ((string (read-until stream #'terminalp)))
(if (every #'digit-char-p string)
(parse-integer string)
- (intern (string-upcase string))))))))
+ (read-symbol string)))))))
(defun ls-read-from-string (string)
(ls-read (make-string-stream string)))
(defvar *compilation-unit-checks* '())
-(defvar *env* '())
-(defvar *fenv* '())
-
-(defun make-binding (name type js declared)
- (list name type js declared))
+(defun make-binding (name type value &optional declarations)
+ (list name type value declarations))
(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))
+(defun binding-value (b) (third b))
+(defun binding-declarations (b) (fourth b))
+
+(defun set-binding-value (b value)
+ (setcar (cddr b) value))
+
+(defun set-binding-declarations (b value)
+ (setcar (cdddr b) value))
+
+(defun push-binding-declaration (decl b)
+ (set-binding-declarations b (cons decl (binding-declarations b))))
+
+
+(defun make-lexenv ()
+ (list nil nil nil nil))
+
+(defun copy-lexenv (lexenv)
+ (copy-list lexenv))
+
+(defun push-to-lexenv (binding lexenv namespace)
+ (ecase namespace
+ (variable (setcar lexenv (cons binding (car lexenv))))
+ (function (setcar (cdr lexenv) (cons binding (cadr lexenv))))
+ (block (setcar (cddr lexenv) (cons binding (caddr lexenv))))
+ (gotag (setcar (cdddr lexenv) (cons binding (cadddr lexenv))))))
+
+(defun extend-lexenv (bindings lexenv namespace)
+ (let ((env (copy-lexenv lexenv)))
+ (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))
+ (gotag (fourth lexenv)))))
+
+(defvar *environment* (make-lexenv))
(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)))
+(defun translate-variable (symbol)
+ (binding-value (lookup-in-lexenv symbol *environment* 'variable)))
+(defun extend-local-env (args)
+ (let ((new (copy-lexenv *environment*)))
+ (dolist (symbol args new)
+ (let ((b (make-binding symbol 'lexical-variable (gvarname symbol))))
+ (push-to-lexenv b new 'variable)))))
+
+;;; Toplevel compilations
(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 toplevel-compilation (string)
+ (push string *toplevel-compilations*))
+
+(defun null-or-empty-p (x)
+ (zerop (length x)))
-(defun %compile-defun (name)
- (let ((b (lookup-function name *fenv*)))
- (mark-binding-as-declared b)
- (push (concat "var " (binding-translation b)) *toplevel-compilations*)))
+(defun get-toplevel-compilations ()
+ (reverse (remove-if #'null-or-empty-p *toplevel-compilations*)))
(defun %compile-defmacro (name lambda)
- (push (make-binding name 'macro lambda t) *fenv*))
+ (toplevel-compilation (ls-compile `',name))
+ (push-to-lexenv (make-binding name 'macro lambda) *environment* 'function))
+
+(defun global-binding (name type namespace)
+ (or (lookup-in-lexenv name *environment* namespace)
+ (let ((b (make-binding name type nil)))
+ (push-to-lexenv b *environment* namespace)
+ b)))
+
+(defun claimp (symbol namespace claim)
+ (let ((b (lookup-in-lexenv symbol *environment* namespace)))
+ (and b (member claim (binding-declarations b)))))
+
+(defun !proclaim (decl)
+ (case (car decl)
+ (notinline
+ (dolist (name (cdr decl))
+ (let ((b (global-binding name 'function 'function)))
+ (push-binding-declaration 'notinline b))))
+ (constant
+ (dolist (name (cdr decl))
+ (let ((b (global-binding name 'variable 'variable)))
+ (push-binding-declaration 'constant b))))
+ (non-overridable
+ (dolist (name (cdr decl))
+ (let ((b (global-binding name 'function 'function)))
+ (push-binding-declaration 'non-overridable b))))))
-(defvar *compilations* nil)
+#+ecmalisp
+(fset 'proclaim #'!proclaim)
-(defun ls-compile-block (sexps env fenv)
- (join-trailing
- (remove-if (lambda (x)
- (or (null x)
- (and (stringp x)
- (zerop (length x)))))
- (mapcar (lambda (x) (ls-compile x env fenv)) sexps))
- (concat ";" *newline*)))
+;;; Special forms
+
+(defvar *compilations* nil)
(defmacro define-compilation (name args &body 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))
+ ;; variable *ENVIRONMENT*.
+ `(push (list ',name (lambda ,args (block ,name ,@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)
+ (concat "(" (ls-compile condition) " !== " (ls-compile nil)
+ " ? " (ls-compile true)
+ " : " (ls-compile false)
")"))
-
(defvar *lambda-list-keywords* '(&optional &rest))
(defun list-until-keyword (list)
(error "Bad lambda-list"))
(car rest)))
+
+(defun lambda-docstring-wrapper (docstring &rest strs)
+ (if docstring
+ (js!selfcall
+ "var func = " (join strs) ";" *newline*
+ "func.docstring = '" docstring "';" *newline*
+ "return func;" *newline*)
+ (join strs)))
+
(define-compilation lambda (lambda-list &rest body)
(let ((required-arguments (lambda-list-required-arguments lambda-list))
(optional-arguments (lambda-list-optional-arguments lambda-list))
- (rest-argument (lambda-list-rest-argument lambda-list)))
+ (rest-argument (lambda-list-rest-argument lambda-list))
+ documentation)
+ ;; Get the documentation string for the lambda function
+ (when (and (stringp (car body))
+ (not (null (cdr body))))
+ (setq documentation (car body))
+ (setq body (cdr body)))
(let ((n-required-arguments (length required-arguments))
(n-optional-arguments (length optional-arguments))
- (new-env (extend-local-env
- (append (ensure-list rest-argument)
- required-arguments
- optional-arguments)
- env)))
- (concat "(function ("
- (join (mapcar (lambda (x)
- (lookup-variable-translation x new-env))
- (append required-arguments optional-arguments))
- ",")
- "){" *newline*
- ;; Check number of arguments
- (indent
- (if required-arguments
- (concat "if (arguments.length < " (integer-to-string n-required-arguments)
- ") throw 'too few arguments';" *newline*)
- "")
- (if (not rest-argument)
- (concat "if (arguments.length > "
- (integer-to-string (+ n-required-arguments n-optional-arguments))
- ") throw 'too many arguments';" *newline*)
- "")
- ;; Optional arguments
- (if optional-arguments
- (concat "switch(arguments.length){" *newline*
- (let ((optional-and-defaults
- (lambda-list-optional-arguments-with-default lambda-list))
- (cases nil)
- (idx 0))
- (progn
- (while (< idx n-optional-arguments)
- (let ((arg (nth idx optional-and-defaults)))
- (push (concat "case "
- (integer-to-string (+ idx n-required-arguments)) ":" *newline*
- (lookup-variable-translation (car arg) new-env)
- "="
- (ls-compile (cadr arg) new-env fenv)
- ";" *newline*)
- cases)
- (incf idx)))
- (push (concat "default: break;" *newline*) cases)
- (join (reverse cases))))
- "}" *newline*)
- "")
- ;; &rest/&body argument
- (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 (+ n-required-arguments n-optional-arguments))
- "; i--)" *newline*
- (indent js!rest " = "
- "{car: arguments[i], cdr: ") js!rest "};"
- *newline*))
- "")
- ;; Body
- (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)))
+ (*environment* (extend-local-env
+ (append (ensure-list rest-argument)
+ required-arguments
+ optional-arguments))))
+ (lambda-docstring-wrapper
+ documentation
+ "(function ("
+ (join (mapcar #'translate-variable
+ (append required-arguments optional-arguments))
+ ",")
+ "){" *newline*
+ ;; Check number of arguments
+ (indent
+ (if required-arguments
+ (concat "if (arguments.length < " (integer-to-string n-required-arguments)
+ ") throw 'too few arguments';" *newline*)
+ "")
+ (if (not rest-argument)
+ (concat "if (arguments.length > "
+ (integer-to-string (+ n-required-arguments n-optional-arguments))
+ ") throw 'too many arguments';" *newline*)
+ "")
+ ;; Optional arguments
+ (if optional-arguments
+ (concat "switch(arguments.length){" *newline*
+ (let ((optional-and-defaults
+ (lambda-list-optional-arguments-with-default lambda-list))
+ (cases nil)
+ (idx 0))
+ (progn
+ (while (< idx n-optional-arguments)
+ (let ((arg (nth idx optional-and-defaults)))
+ (push (concat "case "
+ (integer-to-string (+ idx n-required-arguments)) ":" *newline*
+ (translate-variable (car arg))
+ "="
+ (ls-compile (cadr arg))
+ ";" *newline*)
+ cases)
+ (incf idx)))
+ (push (concat "default: break;" *newline*) cases)
+ (join (reverse cases))))
+ "}" *newline*)
+ "")
+ ;; &rest/&body argument
+ (if rest-argument
+ (let ((js!rest (translate-variable rest-argument)))
+ (concat "var " js!rest "= " (ls-compile nil) ";" *newline*
+ "for (var i = arguments.length-1; i>="
+ (integer-to-string (+ n-required-arguments n-optional-arguments))
+ "; i--)" *newline*
+ (indent js!rest " = "
+ "{car: arguments[i], cdr: ") js!rest "};"
+ *newline*))
+ "")
+ ;; Body
+ (ls-compile-block body t)) *newline*
+ "})"))))
(define-compilation setq (var val)
- (concat (lookup-variable-translation var env)
- " = "
- (ls-compile val env fenv)))
+ (let ((b (lookup-in-lexenv var *environment* 'variable)))
+ (if (eq (binding-type b) 'lexical-variable)
+ (concat (binding-value b) " = " (ls-compile val))
+ (ls-compile `(set ',var ,val)))))
+
+;;; FFI Variable accessors
+(define-compilation js-vref (var)
+ var)
+
+(define-compilation js-vset (var val)
+ (concat "(" var " = " (ls-compile val) ")"))
+
;;; 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))) *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))
+ ((symbolp sexp)
+ (or (cdr (assoc sexp *literal-symbols*))
+ (let ((v (genlit))
+ (s #+common-lisp (concat "{name: \"" (escape-string (symbol-name sexp)) "\"}")
+ #+ecmalisp (ls-compile `(intern ,(symbol-name sexp)))))
+ (push (cons sexp v) *literal-symbols*)
+ (toplevel-compilation (concat "var " v " = " s))
+ v)))
+ ((consp sexp)
+ (let ((c (concat "{car: " (literal (car sexp) t) ", "
+ "cdr: " (literal (cdr sexp) t) "}")))
+ (if recursive
+ c
+ (let ((v (genlit)))
+ (toplevel-compilation (concat "var " v " = " c))
+ v))))))
(define-compilation quote (sexp)
(literal sexp))
-(define-compilation while (pred &rest body)
- (concat "(function(){" *newline*
- (indent "while("
- (ls-compile pred env fenv)
- " !== "
- (ls-compile nil nil nil) "){" *newline*
- (indent (ls-compile-block body env fenv)))
- "}})()"))
+(define-compilation %while (pred &rest body)
+ (js!selfcall
+ "while(" (ls-compile pred) " !== " (ls-compile nil) "){" *newline*
+ (indent (ls-compile-block body))
+ "}"
+ "return " (ls-compile nil) ";" *newline*))
(define-compilation function (x)
(cond
((and (listp x) (eq (car x) 'lambda))
- (ls-compile x env fenv))
+ (ls-compile x))
((symbolp x)
- (lookup-function-translation x fenv))))
+ (ls-compile `(symbol-function ',x)))))
(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)))
+ (ls-compile ,form)))
(define-compilation progn (&rest body)
- (concat "(function(){" *newline*
- (indent (ls-compile-block (butlast body) env fenv)
- "return " (ls-compile (car (last body)) env fenv) ";" *newline*)
- "})()"))
+ (js!selfcall (ls-compile-block body t)))
+
+(defun dynamic-binding-wrapper (bindings body)
+ (if (null bindings)
+ body
+ (concat
+ "try {" *newline*
+ (indent
+ "var tmp;" *newline*
+ (join
+ (mapcar (lambda (b)
+ (let ((s (ls-compile `(quote ,(car b)))))
+ (concat "tmp = " s ".value;" *newline*
+ s ".value = " (cdr b) ";" *newline*
+ (cdr b) " = tmp;" *newline*)))
+ bindings))
+ body)
+ "}" *newline*
+ "finally {" *newline*
+ (indent
+ (join-trailing
+ (mapcar (lambda (b)
+ (let ((s (ls-compile `(quote ,(car b)))))
+ (concat s ".value" " = " (cdr b))))
+ bindings)
+ (concat ";" *newline*)))
+ "}" *newline*)))
+
(define-compilation let (bindings &rest body)
(let ((bindings (mapcar #'ensure-list bindings)))
(let ((variables (mapcar #'first bindings))
(values (mapcar #'second bindings)))
- (let ((new-env (extend-local-env variables env)))
+ (let ((cvalues (mapcar #'ls-compile values))
+ (*environment* (extend-local-env (remove-if #'boundp variables)))
+ (dynamic-bindings))
(concat "(function("
(join (mapcar (lambda (x)
- (lookup-variable-translation x new-env))
+ (if (boundp x)
+ (let ((v (gvarname x)))
+ (push (cons x v) dynamic-bindings)
+ v)
+ (translate-variable x)))
variables)
",")
"){" *newline*
- (indent (ls-compile-block (butlast body) new-env fenv)
- "return " (ls-compile (car (last body)) new-env fenv)
- ";" *newline*)
- "})(" (join (mapcar (lambda (x) (ls-compile x env fenv))
- values)
- ",")
- ")")))))
+ (let ((body (ls-compile-block body t)))
+ (indent (dynamic-binding-wrapper dynamic-bindings body)))
+ "})(" (join cvalues ",") ")")))))
+
+
+(defvar *block-counter* 0)
+
+(define-compilation block (name &rest body)
+ (let ((tr (integer-to-string (incf *block-counter*))))
+ (let ((b (make-binding name 'block tr)))
+ (js!selfcall
+ "try {" *newline*
+ (let ((*environment* (extend-lexenv (list b) *environment* 'block)))
+ (indent "return " (ls-compile `(progn ,@body)) ";" *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 *environment* 'block)))
+ (if b
+ (js!selfcall
+ "throw ({"
+ "type: 'block', "
+ "id: " (binding-value b) ", "
+ "value: " (ls-compile value) ", "
+ "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) ";" *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 value)
+ (js!selfcall
+ "throw ({"
+ "type: 'catch', "
+ "id: " (ls-compile id) ", "
+ "value: " (ls-compile value) ", "
+ "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 (tbidx body)
+ (let ((bindings
+ (mapcar (lambda (label)
+ (let ((tagidx (integer-to-string (incf *go-tag-counter*))))
+ (make-binding label 'gotag (list tbidx tagidx))))
+ (remove-if-not #'go-tag-p body))))
+ (extend-lexenv bindings *environment* '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))))
+ ;; 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 ((*environment* (declare-tagbody-tags tbidx body))
+ initag)
+ (let ((b (lookup-in-lexenv (first body) *environment* 'gotag)))
+ (setq initag (second (binding-value 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) ";" *newline*)
+ (let ((b (lookup-in-lexenv form *environment* 'gotag)))
+ (concat "case " (second (binding-value 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 *environment* 'gotag))
+ (n (cond
+ ((symbolp label) (symbol-name label))
+ ((integerp label) (integer-to-string label)))))
+ (if b
+ (js!selfcall
+ "throw ({"
+ "type: 'tagbody', "
+ "id: " (first (binding-value b)) ", "
+ "label: " (second (binding-value 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) ";" *newline*)
+ "} finally {" *newline*
+ (indent (ls-compile-block clean-up))
+ "}" *newline*
+ "return ret;" *newline*))
+
;;; A little backquote implementation without optimizations of any
;;; kind for ecmalisp.
;;; Primitives
-(defmacro define-builtin (name args &body body)
- `(define-compilation ,name ,args
- (let ,(mapcar (lambda (arg) `(,arg (ls-compile ,arg env fenv))) args)
- ,@body)))
+(defvar *builtins* nil)
+
+(defmacro define-raw-builtin (name args &body body)
+ ;; Creates a new primitive function `name' with parameters args and
+ ;; @body. The body can access to the local environment through the
+ ;; variable *ENVIRONMENT*.
+ `(push (list ',name (lambda ,args (block ,name ,@body)))
+ *builtins*))
-(defun compile-bool (x)
- (concat "(" x "?" (ls-compile t nil nil) ": " (ls-compile nil nil nil) ")"))
+(defmacro define-builtin (name args &body body)
+ `(progn
+ (define-raw-builtin ,name ,args
+ (let ,(mapcar (lambda (arg) `(,arg (ls-compile ,arg))) args)
+ ,@body))))
;;; 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 nil nil)
- "? " (ls-compile nil nil 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 nil nil) "? "
- (ls-compile nil nil 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 fset (symbol value)
+ (concat "(" symbol ").function = " value))
+
+(define-builtin boundp (x)
+ (js!bool (concat "(" x ".value !== undefined)")))
+
+(define-builtin symbol-value (x)
+ (js!selfcall
+ "var symbol = " x ";" *newline*
+ "var value = symbol.value;" *newline*
+ "if (value === undefined) throw \"Variable `\" + symbol.name + \"' is unbound.\";" *newline*
+ "return value;" *newline*))
+
+(define-builtin symbol-function (x)
+ (js!selfcall
+ "var symbol = " x ";" *newline*
+ "var func = symbol.function;" *newline*
+ "if (func === undefined) throw \"Function `\" + symbol.name + \"' is undefined.\";" *newline*
+ "return func;" *newline*))
+
+(define-builtin symbol-plist (x)
+ (concat "((" x ").plist || " (ls-compile nil) ")"))
+
+(define-builtin lambda-code (x)
+ (concat "(" x ").toString()"))
+
+
+(define-builtin eq (x y) (js!bool (concat "(" x " === " y ")")))
+(define-builtin equal (x y) (js!bool (concat "(" x " == " y ")")))
-(define-builtin string (x)
+(define-builtin char-to-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))
(type-check (("x" "string" x))
"x.length"))
-(define-compilation slice (string a &optional b)
- (concat "(function(){" *newline*
- (indent "var str = " (ls-compile string env fenv) ";" *newline*
- "var a = " (ls-compile a env fenv) ";" *newline*
- "var b;" *newline*
- (if b
- (concat "b = " (ls-compile b env fenv) ";" *newline*)
- "")
- "return str.slice(a,b);" *newline*)
- "})()"))
+(define-raw-builtin slice (string a &optional b)
+ (js!selfcall
+ "var str = " (ls-compile string) ";" *newline*
+ "var a = " (ls-compile a) ";" *newline*
+ "var b;" *newline*
+ (if b
+ (concat "b = " (ls-compile b) ";" *newline*)
+ "")
+ "return str.slice(a,b);" *newline*))
(define-builtin char (string index)
(type-check (("string" "string" string)
("string2" "string" string2))
"string1.concat(string2)"))
-(define-compilation funcall (func &rest args)
- (concat "(" (ls-compile func env fenv) ")("
- (join (mapcar (lambda (x)
- (ls-compile x env fenv))
- args)
+(define-raw-builtin funcall (func &rest args)
+ (concat "(" (ls-compile func) ")("
+ (join (mapcar #'ls-compile args)
", ")
")"))
-(define-compilation apply (func &rest args)
+(define-raw-builtin apply (func &rest args)
(if (null args)
- (concat "(" (ls-compile func env fenv) ")()")
+ (concat "(" (ls-compile func) ")()")
(let ((args (butlast args))
(last (car (last args))))
- (concat "(function(){" *newline*
- (indent "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*
- (indent "while (tail != " (ls-compile nil env fenv) "){" *newline*
- " args.push(tail.car);" *newline*
- " tail = tail.cdr;" *newline*
- "}" *newline*
- "return f.apply(this, args);" *newline*)
- "})()")))))
+ (js!selfcall
+ "var f = " (ls-compile func) ";" *newline*
+ "var args = [" (join (mapcar #'ls-compile args)
+ ", ")
+ "];" *newline*
+ "var tail = (" (ls-compile last) ");" *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 nil nil) ": tmp ;" *newline*)
- "})()"))
+(define-builtin objectp (x)
+ (js!bool (concat "(typeof (" x ") === 'object')")))
+
+(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))
"lisp.write(x)"))
-(defun macrop (x)
- (and (symbolp x) (eq (binding-type (lookup-function x *fenv*)) 'macro)))
-
-(defun ls-macroexpand-1 (form env fenv)
- (if (macrop (car form))
- (let ((binding (lookup-function (car form) *env*)))
- (if (eq (binding-type binding) 'macro)
- (apply (eval (binding-translation binding)) (cdr form))
- 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)
+(defun macro (x)
+ (and (symbolp x)
+ (let ((b (lookup-in-lexenv x *environment* 'function)))
+ (and (eq (binding-type b) 'macro)
+ b))))
+
+(defun ls-macroexpand-1 (form)
+ (let ((macro-binding (macro (car form))))
+ (if macro-binding
+ (let ((expander (binding-value macro-binding)))
+ (when (listp expander)
+ (let ((compiled (eval expander)))
+ ;; The list representation are useful while
+ ;; bootstrapping, as we can dump the definition of the
+ ;; macros easily, but they are slow because we have to
+ ;; evaluate them and compile them now and again. So, let
+ ;; us replace the list representation version of the
+ ;; function with the compiled one.
+ ;;
+ #+ecmalisp (set-binding-value macro-binding compiled)
+ (setq expander compiled)))
+ (apply expander (cdr form)))
+ form)))
+
+(defun compile-funcall (function args)
+ (if (and (symbolp function)
+ (claimp function 'function 'non-overridable))
+ (concat (ls-compile `',function) ".function("
+ (join (mapcar #'ls-compile args)
+ ", ")
+ ")")
+ (concat (ls-compile `#',function) "("
+ (join (mapcar #'ls-compile args)
+ ", ")
+ ")")))
+
+(defun ls-compile-block (sexps &optional return-last-p)
+ (if return-last-p
+ (concat (ls-compile-block (butlast sexps))
+ "return " (ls-compile (car (last sexps))) ";")
+ (join-trailing
+ (remove-if #'null-or-empty-p (mapcar #'ls-compile sexps))
+ (concat ";" *newline*))))
+
+(defun ls-compile (sexp)
(cond
- ((symbolp sexp) (lookup-variable-translation sexp env))
+ ((symbolp sexp)
+ (let ((b (lookup-in-lexenv sexp *environment* 'variable)))
+ (cond
+ ((eq (binding-type b) 'lexical-variable)
+ (binding-value b))
+ ((claimp sexp 'variable 'constant)
+ (concat (ls-compile `',sexp) ".value"))
+ (t
+ (ls-compile `(symbol-value ',sexp))))))
((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))))))
+ (let ((name (car sexp))
+ (args (cdr sexp)))
+ (cond
+ ;; Special forms
+ ((assoc name *compilations*)
+ (let ((comp (second (assoc name *compilations*))))
+ (apply comp args)))
+ ;; Built-in functions
+ ((and (assoc name *builtins*)
+ (not (claimp name 'function 'notinline)))
+ (let ((comp (second (assoc name *builtins*))))
+ (apply comp args)))
+ (t
+ (if (macro name)
+ (ls-compile (ls-macroexpand-1 sexp))
+ (compile-funcall name args))))))))
(defun ls-compile-toplevel (sexp)
- (setq *toplevel-compilations* nil)
- (let ((code (ls-compile sexp nil nil)))
- (prog1
- (concat (join (mapcar (lambda (x) (concat x ";" *newline*))
- *toplevel-compilations*))
- code)
- (setq *toplevel-compilations* nil))))
+ (let ((*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)))
+ (concat (join-trailing (get-toplevel-compilations)
+ (concat ";" *newline*))
+ (if code
+ (concat code ";" *newline*)
+ "")))))))
;;; Once we have the compiler, we define the runtime environment and
#+ecmalisp
(progn
- (defmacro with-compilation-unit (&body 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))))
- (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))
- (c6 (ls-compile `(setq *gensym-counter* ',*gensym-counter*) nil nil)))
- (setq *toplevel-compilations*
- (append *toplevel-compilations* (list c1 c2 c3 c4 c5 c6)))))
-
- (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*)))
+ (defmacro with-compilation-unit (&body body)
+ `(prog1
+ (progn
+ (setq *compilation-unit-checks* nil)
+ ,@body)
+ (dolist (check *compilation-unit-checks*)
+ (funcall check))))
+
+ (defun eval (x)
+ (let ((code
+ (with-compilation-unit
+ (ls-compile-toplevel x))))
+ (js-eval code)))
+
+ (export '(* *gensym-counter* *package* + - / 1+ 1- < <= = = > >= and append
+ apply assoc atom block boundp boundp butlast caar cadddr
+ caddr cadr car car case catch cdar cdddr cddr cdr cdr char
+ char-code char= code-char cond cons consp copy-list decf
+ declaim defparameter defun defvar digit-char-p disassemble
+ documentation dolist dotimes ecase eq eql equal error eval
+ every export fdefinition find-package find-symbol first
+ fourth fset funcall function functionp gensym go identity
+ in-package incf integerp integerp intern lambda-code last
+ length let list listp make-package make-symbol mapcar
+ member minusp mod nil not nth nthcdr null numberp or
+ package-name package-use-list packagep plusp
+ prin1-to-string print proclaim prog1 prog2 pron push quote
+ remove remove-if remove-if-not return return-from
+ revappend reverse second set setq some string-upcase
+ string string= stringp subseq symbol-function symbol-name
+ symbol-package symbol-plist symbol-value symbolp t tagbody
+ third throw truncate unless unwind-protect variable warn
+ when write-line write-string zerop))
+
+ (setq *package* *user-package*)
+
+ (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
+ (toplevel-compilation
+ (ls-compile
+ `(progn
+ ,@(mapcar (lambda (s) `(%intern-symbol (js-vref ,(cdr s))))
+ *literal-symbols*)
+ (setq *literal-symbols* ',*literal-symbols*)
+ (setq *environment* ',*environment*)
+ (setq *variable-counter* ,*variable-counter*)
+ (setq *gensym-counter* ,*gensym-counter*)
+ (setq *block-counter* ,*block-counter*)))))
+
+ (eval-when-compile
+ (toplevel-compilation
+ (ls-compile
+ `(setq *literal-counter* ,*literal-counter*)))))
;;; Finally, we provide a couple of functions to easily bootstrap
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))
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
- *literal-counter* 0)
+ *literal-counter* 0
+ *block-counter* 0)
(ls-compile-file "ecmalisp.lisp" "ecmalisp.js")))
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