-#+lispstrack
-(progn
- (eval-when-compile
- (%compile-defmacro 'defmacro
- (lambda (name args &rest body)
- `(eval-when-compile
- (%compile-defmacro ',name (lambda ,args ,@body))))))
-
- (defmacro defvar (name value)
- `(progn
- (eval-when-compile
- (%compile-defvar ',name))
- (setq ,name ,value)))
-
- (defmacro defun (name args &rest body)
- `(progn
- (eval-when-compile
- (%compile-defun ',name))
- (fsetq ,name (lambda ,args ,@body))))
-
- (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 cons (x y) (cons x y))
- (defun car (x) (car x))
- (defun cdr (x) (cdr x))
-
- (defun append (list1 list2)
- (if (null list1)
- list2
- (cons (car list1)
- (append (cdr list1) list2))))
-
- (defun reverse-aux (list acc)
- (if (null list)
- acc
- (reverse-aux (cdr list) (cons (car list) acc))))
-
- (defun reverse (list)
- (reverse-aux list '()))
-
- (defun mapcar (func list)
- (if (null list)
- '()
- (cons (funcall func (car list))
- (mapcar func (cdr list)))))
-
- (defmacro push (x place)
- `(setq ,place (cons ,x ,place))))
-
+(defun ensure-list (x)
+ (if (listp x)
+ x
+ (list x)))
(defun !reduce (func list initial)
(if (null list)
((not ,condition))
,@body))
- #+common-lisp
(defun concat-two (s1 s2)
- (concatenate 'string s1 s2)))
+ (concatenate 'string s1 s2))
-(defvar *newline* "
-")
+ (defun setcar (cons new)
+ (setf (car cons) new))
+ (defun setcdr (cons new)
+ (setf (cdr cons) new)))
+
+(defvar *newline* (string (code-char 10)))
(defun concat (&rest strs)
(!reduce (lambda (s1 s2) (concat-two s1 s2))
(join (cdr list) separator)))))
(defun join-trailing (list separator)
- (if (null list)
- ""
- (concat (car list) separator (join-trailing (cdr list) separator))))
+ (cond
+ ((null list)
+ "")
+ ((null (car list))
+ (join-trailing (cdr list) separator))
+ (t
+ (concat (car list) separator (join-trailing (cdr list) separator)))))
(defun integer-to-string (x)
(if (zerop x)
(cons string 0))
(defun %peek-char (stream)
- (if (streamp stream)
- (peek-char nil stream nil)
- (and (< (cdr stream) (length (car stream)))
- (char (car stream) (cdr stream)))))
+ (and (< (cdr stream) (length (car stream)))
+ (char (car stream) (cdr stream))))
(defun %read-char (stream)
- (if (streamp stream)
- (read-char stream nil)
- (and (< (cdr stream) (length (car stream)))
- (prog1 (char (car stream) (cdr stream))
- (incf (cdr stream))))))
+ (and (< (cdr stream) (length (car stream)))
+ (prog1 (char (car stream) (cdr stream))
+ (setcdr stream (1+ (cdr stream))))))
(defun whitespacep (ch)
(or (char= ch #\space) (char= ch #\newline) (char= ch #\tab)))
(let (ch)
(skip-whitespaces stream)
(setq ch (%peek-char stream))
- (while (and ch (eql ch #\;))
- (read-until stream (lambda (x) (eql x #\newline)))
+ (while (and ch (char= ch #\;))
+ (read-until stream (lambda (x) (char= x #\newline)))
(skip-whitespaces stream)
(setq ch (%peek-char stream)))))
(t
(cons (ls-read stream) (%read-list stream))))))
+(defun read-string (stream)
+ (let ((string "")
+ (ch nil))
+ (setq ch (%read-char stream))
+ (while (not (char= ch #\"))
+ (when (char= ch #\\)
+ (setq ch (%read-char stream)))
+ (setq string (concat string (string ch)))
+ (setq ch (%read-char stream)))
+ string))
+
(defvar *eof* (make-symbol "EOF"))
(defun ls-read (stream)
(skip-whitespaces-and-comments stream)
(list 'backquote (ls-read stream)))
((char= ch #\")
(%read-char stream)
- (prog1 (read-until stream (lambda (ch) (char= ch #\")))
- (%read-char stream)))
+ (read-string stream))
((char= ch #\,)
(%read-char stream)
(if (eql (%peek-char stream) #\@)
(ecase (%read-char stream)
(#\'
(list 'function (ls-read stream)))
+ (#\\
+ (let ((cname
+ (concat (string (%read-char stream))
+ (read-until stream #'terminalp))))
+ (cond
+ ((string= cname "space") (char-code #\space))
+ ((string= cname "tab") (char-code #\tab))
+ ((string= cname "newline") (char-code #\newline))
+ (t (char-code (char cname 0))))))
(#\+
(let ((feature (read-until stream #'terminalp)))
(cond
((string= feature "common-lisp")
- (ls-read stream);ignore
+ (ls-read stream) ;ignore
(ls-read stream))
((string= feature "lispstrack")
(ls-read stream))
;;;; Compiler
-(let ((counter 0))
- (defun make-var-binding (symbol)
- (cons symbol (concat "v" (integer-to-string (incf counter))))))
+(defvar *compilation-unit-checks* '())
-(let ((counter 0))
- (defun make-func-binding (symbol)
- (cons symbol (concat "f" (integer-to-string (incf counter))))))
+(defvar *env* '())
+(defvar *fenv* '())
-(defvar *compilations* nil)
+(defun make-binding (name type js declared)
+ (list name type js declared))
-(defun ls-compile-block (sexps env fenv)
- (join-trailing (mapcar (lambda (x)
- (ls-compile x env fenv))
- sexps)
- ";
-"))
+(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 extend-env (args env)
- (append (mapcar #'make-var-binding args) env))
+(defvar *variable-counter* 0)
+(defun gvarname (symbol)
+ (concat "v" (integer-to-string (incf *variable-counter*))))
-(defparameter *env* '())
-(defparameter *fenv* '())
+(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 ls-lookup (symbol env)
- (let ((binding (assoc symbol env)))
- (and binding (cdr binding))))
+(defun %compile-defvar (name)
+ (let ((b (lookup-variable name *env*)))
+ (mark-binding-as-declared b)
+ (push (concat "var " (binding-translation b)) *toplevel-compilations*)))
-(defun lookup-variable (symbol env)
- (or (ls-lookup symbol env)
- (ls-lookup symbol *env*)
- (error "Undefined variable `~a'" symbol)))
+(defun %compile-defun (name)
+ (let ((b (lookup-function name *env*)))
+ (mark-binding-as-declared b)
+ (push (concat "var " (binding-translation b)) *toplevel-compilations*)))
-(defun lookup-function (symbol env)
- (or (ls-lookup symbol env)
- (ls-lookup symbol *fenv*)
- (error "Undefined function `~a'" symbol)))
+(defun %compile-defmacro (name lambda)
+ (push (make-binding name 'macro lambda t) *fenv*))
+
+
+(defvar *compilations* nil)
-(defmacro define-compilation (name args &body body)
+(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*))
-(defvar *toplevel-compilations*)
-
(define-compilation if (condition true false)
(concat "("
- (ls-compile condition env fenv)
+ (ls-compile condition env fenv) " !== " (ls-compile nil nil nil)
" ? "
(ls-compile true env fenv)
" : "
(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-env (cons rest-argument required-arguments) env)))
+ (let ((new-env (extend-local-env
+ (append (and rest-argument (list rest-argument))
+ required-arguments)
+ env)))
(concat "(function ("
- (join (mapcar (lambda (x) (lookup-variable x new-env))
+ (join (mapcar (lambda (x)
+ (lookup-variable-translation x new-env))
required-arguments)
",")
"){"
*newline*
(if rest-argument
- (concat "var " (lookup-variable rest-argument new-env) ";" *newline*
- "for (var i = arguments.length-1; i>="
- (integer-to-string (length required-arguments))
- "; i--)" *newline*
- (lookup-variable rest-argument new-env) " = "
- "{car: arguments[i], cdr: " (lookup-variable rest-argument new-env) "};"
- *newline*)
+ (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) ";")
"})"))))
(define-compilation fsetq (var val)
- (concat (lookup-function var fenv)
+ (concat (lookup-function-translation var fenv)
" = "
(ls-compile val env fenv)))
(define-compilation setq (var val)
- (concat (lookup-variable var env)
+ (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
- ((null sexp) "undefined")
((integerp sexp) (integer-to-string sexp))
- ((stringp sexp) (concat "\"" sexp "\""))
- ((symbolp sexp) (concat "{name: \"" (symbol-name 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)) "}"))))
-(let ((counter 0))
- (defun literal (form)
- (let ((var (concat "l" (integer-to-string (incf counter)))))
- (push (concat "var " var " = " (literal->js form)) *toplevel-compilations*)
- var)))
+(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 while (pred &rest body)
(concat "(function(){ while("
- (ls-compile pred env fenv)
+ (ls-compile pred env fenv) " !== " (ls-compile nil nil nil)
"){"
(ls-compile-block body env fenv)
"}})()"))
((and (listp x) (eq (car x) 'lambda))
(ls-compile x env fenv))
((symbolp x)
- (lookup-function x fenv))))
+ (lookup-function-translation x fenv))))
#+common-lisp
(defmacro eval-when-compile (&body body)
- `(eval-when (:compile-toplevel :execute)
+ `(eval-when (:compile-toplevel :load-toplevel :execute)
,@body))
-(defvar *eval-when-compilations*)
(define-compilation eval-when-compile (&rest body)
(eval (cons 'progn body))
nil)
`((lambda () ,@body)))
(define-transformation let (bindings &rest body)
- `((lambda ,(mapcar 'car bindings) ,@body)
- ,@(mapcar 'cadr bindings)))
+ (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.
;;; 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)
+ (compile-bool (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) "))"))
+ (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)
- (concat "(" (ls-compile x env fenv) "== undefined)"))
+ (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 "(" (ls-compile x env fenv) ").car"))
+ (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 "(" (ls-compile x env fenv) ").cdr"))
+ (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)
- (concat "(" (ls-compile x env fenv) " === " (ls-compile y env fenv) ")"))
+ (compile-bool
+ (concat "(" (ls-compile x env fenv) " === " (ls-compile y env fenv) ")")))
-(define-compilation eql (x y)
- (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 code-char (x)
- (concat "String.fromCharCode( " (ls-compile x 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 "("
", ")
")"))
-(defun %compile-defvar (name)
- (push (make-var-binding name) *env*)
- (push (concat "var " (lookup-variable name *env*)) *toplevel-compilations*))
-
-(defun %compile-defun (name)
- (push (make-func-binding name) *fenv*)
- (push (concat "var " (lookup-variable name *fenv*)) *toplevel-compilations*))
-
-(defun %compile-defmacro (name lambda)
- (push (cons name (cons 'macro lambda)) *fenv*))
-
-(defun ls-macroexpand-1 (form &optional env fenv)
- (let ((function (cdr (assoc (car form) *fenv*))))
- (if (and (listp function) (eq (car function) 'macro))
- (apply (eval (cdr function)) (cdr form))
- form)))
+(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)
+ (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 function fenv)
+ (concat (lookup-function-translation function fenv)
"("
(join (mapcar (lambda (x) (ls-compile x env fenv)) args)
", ")
", ")
")"))
(t
- (error "Invalid function designator ~a." function))))
+ (error (concat "Invalid function designator " (symbol-name function))))))
-(defun ls-compile (sexp &optional env fenv)
+(defun ls-compile (sexp env fenv)
(cond
- ((symbolp sexp) (lookup-variable sexp env))
+ ((symbolp sexp) (lookup-variable-translation sexp env))
((integerp sexp) (integer-to-string sexp))
- ((stringp sexp) (concat "\"" sexp "\""))
+ ((stringp sexp) (concat "\"" (escape-string sexp) "\""))
((listp sexp)
- (let ((sexp (ls-macroexpand-1 sexp env fenv)))
- (let ((compiler-func (second (assoc (car sexp) *compilations*))))
- (if compiler-func
- (apply compiler-func env fenv (cdr sexp))
- (compile-funcall (car sexp) (cdr sexp) env fenv)))))))
+ (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)))
+ (let ((code (ls-compile sexp nil nil)))
(prog1
- (concat (join (mapcar (lambda (x) (concat x ";" *newline*))
+ (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 ls-compile-file (filename output)
+ (defun read-whole-file (filename)
(with-open-file (in filename)
- (with-open-file (out output :direction :output :if-exists :supersede)
+ (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 compilation do (write-line (concat compilation "; ") out)))))
+ 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")))
projects / jscl.git / blobdiff