(defmacro named-lambda (name args &rest body)
(let ((x (gensym "FN")))
`(let ((,x (lambda ,args ,@body)))
- (set ,x "fname" ,name)
+ (oset ,x "fname" ,name)
,x)))
(defmacro %defun (name args &rest body)
(defvar *package* (new))
(defvar nil (make-symbol "NIL"))
- (set *package* "NIL" nil)
+ (oset *package* "NIL" nil)
(defvar t (make-symbol "T"))
- (set *package* "T" t)
+ (oset *package* "T" t)
(defun null (x)
(eq x nil))
(defun intern (name)
(if (internp name)
- (get *package* name)
- (set *package* name (make-symbol name))))
+ (oget *package* name)
+ (oset *package* name (make-symbol name))))
(defun find-symbol (name)
- (get *package* name))
+ (oget *package* name))
(defvar *gensym-counter* 0)
(defun gensym (&optional (prefix "G"))
(,var nil))
(%while ,g!list
(setq ,var (car ,g!list))
- ,@body
+ (tagbody ,@body)
(setq ,g!list (cdr ,g!list)))
,(third iter)))))
(let ((,var 0)
(,g!to ,to))
(%while (< ,var ,g!to)
- ,@body
+ (tagbody ,@body)
(incf ,var))
,result))))
(let ((value (gensym)))
`(let ((,value ,form))
,@body
- ,value))))
+ ,value)))
+
+ (defmacro prog2 (form1 result &body body)
+ `(prog1 (progn ,form1 ,result) ,@body))
+
+
+
+)
;;; This couple of helper functions will be defined in both Common
;;; Lisp and in Ecmalisp.
(defun append (&rest lists)
(!reduce #'append-two lists '()))
- (defun reverse-aux (list acc)
- (if (null list)
- acc
- (reverse-aux (cdr list) (cons (car list) acc))))
+ (defun revappend (list1 list2)
+ (while list1
+ (push (car list1) list2)
+ (setq list1 (cdr list1)))
+ list2)
(defun reverse (list)
- (reverse-aux list '()))
+ (revappend list '()))
(defun list-length (list)
(let ((l 0))
(defun listp (x)
(or (consp x) (null x)))
+ (defun nthcdr (n list)
+ (while (and (plusp n) list)
+ (setq n (1- n))
+ (setq list (cdr list)))
+ list)
+
(defun nth (n list)
- (cond
- ((null list) list)
- ((zerop n) (car list))
- (t (nth (1- n) (cdr list)))))
+ (car (nthcdr n list)))
(defun last (x)
- (if (consp (cdr x))
- (last (cdr x))
- x))
+ (while (consp (cdr x))
+ (setq x (cdr x)))
+ x)
(defun butlast (x)
(and (consp (cdr x))
(cons (car x) (butlast (cdr x)))))
(defun member (x list)
- (cond
- ((null list)
- nil)
- ((eql x (car list))
- list)
- (t
- (member x (cdr list)))))
+ (while list
+ (when (eql x (car list))
+ (return list))
+ (setq list (cdr list))))
(defun remove (x list)
(cond
""
(concat (car list) separator (join-trailing (cdr list) separator))))
-;;; Like CONCAT, but prefix each line with four spaces.
+
+;;; Like CONCAT, but prefix each line with four spaces. Two versions
+;;; of this function are available, because the Ecmalisp version is
+;;; very slow and bootstraping was annoying.
+
+#+ecmalisp
(defun indent (&rest string)
(let ((input (join string)))
(let ((output "")
(index 0)
(size (length input)))
- (when (plusp size)
- (setq output " "))
+ (when (plusp (length input)) (concatf output " "))
(while (< index size)
- (setq output
- (concat output
- (if (and (char= (char input index) #\newline)
- (< index (1- size))
- (not (char= (char input (1+ index)) #\newline)))
- (concat (string #\newline) " ")
- (subseq input index (1+ index)))))
+ (let ((str
+ (if (and (char= (char input index) #\newline)
+ (< index (1- size))
+ (not (char= (char input (1+ index)) #\newline)))
+ (concat (string #\newline) " ")
+ (string (char input index)))))
+ (concatf output str))
(incf index))
output)))
+#+common-lisp
+(defun indent (&rest string)
+ (with-output-to-string (*standard-output*)
+ (with-input-from-string (input (join string))
+ (loop
+ for line = (read-line input nil)
+ while line
+ do (write-string " ")
+ do (write-line line)))))
+
+
(defun integer-to-string (x)
(cond
((zerop x)
digits))))))
-(defun js!selfcall (&rest args)
- (concat "(function(){" *newline* (apply #'indent args) "})()"))
+;;; 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
((integerp form) (integer-to-string form))
((stringp form) (concat "\"" (escape-string form) "\""))
((functionp form)
- (let ((name (get form "fname")))
+ (let ((name (oget form "fname")))
(if name
(concat "#<FUNCTION " name ">")
(concat "#<FUNCTION>"))))
(defvar *environment* (make-lexenv))
(defun clear-undeclared-global-bindings ()
- (let ((variables (first *environment*))
- (functions (second *environment*)))
- (setq *environment* (list variables functions (third *environment*)))))
+ (setq *environment*
+ (mapcar (lambda (namespace)
+ (remove-if-not #'binding-declared namespace))
+ *environment*)))
(defvar *variable-counter* 0)
(or (lookup-in-lexenv symbol env 'variable)
(lookup-in-lexenv symbol *environment* 'variable)
(let ((name (symbol-name symbol))
- (binding (make-binding symbol 'variable (gvarname symbol) nil)))
+ (binding (make-binding symbol 'special-variable (gvarname symbol) nil)))
(push-to-lexenv binding *environment* 'variable)
(push (lambda ()
- (unless (lookup-in-lexenv symbol *environment* 'variable)
- (error (concat "Undefined variable `" name "'"))))
+ (let ((b (lookup-in-lexenv symbol *environment* 'variable)))
+ (unless (binding-declared b)
+ (error (concat "Undefined variable `" name "'")))))
*compilation-unit-checks*)
binding)))
(defun extend-local-env (args env)
(let ((new (copy-lexenv env)))
(dolist (symbol args new)
- (let ((b (make-binding symbol 'variable (gvarname symbol) t)))
+ (let ((b (make-binding symbol 'lexical-variable (gvarname symbol) t)))
(push-to-lexenv b new 'variable)))))
(defvar *function-counter* 0)
nil)))
(push-to-lexenv binding *environment* 'function)
(push (lambda ()
- (unless (binding-declared (lookup-in-lexenv symbol *environment* 'function))
- (error (concat "Undefined function `" name "'"))))
+ (let ((b (lookup-in-lexenv symbol *environment* 'function)))
+ (unless (binding-declared b)
+ (error (concat "Undefined function `" name "'")))))
*compilation-unit-checks*)
binding)))
(ls-compile val env)))
(define-compilation setq (var val)
- (concat (lookup-variable-translation var env)
- " = "
- (ls-compile val env)))
+ (let ((b (lookup-variable var env)))
+ (ecase (binding-type b)
+ (lexical-variable (concat (binding-translation b) " = " (ls-compile val env)))
+ (special-variable (ls-compile `(set ',var ,val) env)))))
+
;;; Literals
(defun escape-string (string)
(literal sexp))
(define-compilation %while (pred &rest body)
- (concat "(function(){" *newline*
- (indent "while(" (ls-compile pred env) " !== " (ls-compile nil) "){" *newline*
- (indent (ls-compile-block body env))
- "}"
- "return " (ls-compile nil) ";" *newline*)
- "})()"))
+ (js!selfcall
+ "while(" (ls-compile pred env) " !== " (ls-compile nil) "){" *newline*
+ (indent (ls-compile-block body env))
+ "}"
+ "return " (ls-compile nil) ";" *newline*))
(define-compilation function (x)
(cond
(ls-compile ,form env)))
(define-compilation progn (&rest body)
- (concat "(function(){" *newline*
- (indent (ls-compile-block (butlast body) env)
- "return " (ls-compile (car (last body)) env) ";" *newline*)
- "})()"))
+ (js!selfcall
+ (ls-compile-block (butlast body) env)
+ "return " (ls-compile (car (last body)) env) ";" *newline*))
(define-compilation let (bindings &rest body)
(let ((bindings (mapcar #'ensure-list bindings)))
(define-compilation block (name &rest body)
(let ((tr (integer-to-string (incf *block-counter*))))
(let ((b (make-binding name 'block tr t)))
- (concat "(function(){" *newline*
- (indent "try {" *newline*
- (indent "return " (ls-compile `(progn ,@body)
- (extend-lexenv (list b) env 'block))
- ";" *newline*)
- "}" *newline*
- "catch (cf){" *newline*
- " if (cf.type == 'block' && cf.id == " tr ")" *newline*
- " return cf.value;" *newline*
- " else" *newline*
- " throw cf;" *newline*
- "}" *newline*)
- "})()"))))
+ (js!selfcall
+ "try {" *newline*
+ (indent "return " (ls-compile `(progn ,@body)
+ (extend-lexenv (list b) env 'block))
+ ";" *newline*)
+ "}" *newline*
+ "catch (cf){" *newline*
+ " if (cf.type == 'block' && cf.id == " tr ")" *newline*
+ " return cf.value;" *newline*
+ " else" *newline*
+ " throw cf;" *newline*
+ "}" *newline*))))
(define-compilation return-from (name &optional value)
(let ((b (lookup-in-lexenv name env 'block)))
(if b
- (concat "(function(){ throw ({"
- "type: 'block', "
- "id: " (binding-translation b) ", "
- "value: " (ls-compile value env) ", "
- "message: 'Return from unknown block " (symbol-name name) ".'"
- "})})()")
+ (js!selfcall
+ "throw ({"
+ "type: 'block', "
+ "id: " (binding-translation b) ", "
+ "value: " (ls-compile value env) ", "
+ "message: 'Return from unknown block " (symbol-name name) ".'"
+ "})")
(error (concat "Unknown block `" (symbol-name name) "'.")))))
(define-compilation catch (id &rest body)
- (concat "(function(){" *newline*
- (indent "var id = " (ls-compile id env) ";" *newline*
- "try {" *newline*
- (indent "return " (ls-compile `(progn ,@body))
- ";" *newline*)
- "}" *newline*
- "catch (cf){" *newline*
- " if (cf.type == 'catch' && cf.id == id)" *newline*
- " return cf.value;" *newline*
- " else" *newline*
- " throw cf;" *newline*
- "}" *newline*)
- "})()"))
+ (js!selfcall
+ "var id = " (ls-compile id env) ";" *newline*
+ "try {" *newline*
+ (indent "return " (ls-compile `(progn ,@body))
+ ";" *newline*)
+ "}" *newline*
+ "catch (cf){" *newline*
+ " if (cf.type == 'catch' && cf.id == id)" *newline*
+ " return cf.value;" *newline*
+ " else" *newline*
+ " throw cf;" *newline*
+ "}" *newline*))
(define-compilation throw (id &optional value)
- (concat "(function(){ throw ({"
- "type: 'catch', "
- "id: " (ls-compile id env) ", "
- "value: " (ls-compile value env) ", "
- "message: 'Throw uncatched.'"
- "})})()"))
+ (js!selfcall
+ "throw ({"
+ "type: 'catch', "
+ "id: " (ls-compile id env) ", "
+ "value: " (ls-compile value env) ", "
+ "message: 'Throw uncatched.'"
+ "})"))
(defvar *tagbody-counter* 0)
((integerp label) (integer-to-string label)))))
(if b
(js!selfcall
- (concat "throw ({"
- "type: 'tagbody', "
- "id: " (first (binding-translation b)) ", "
- "label: " (second (binding-translation b)) ", "
- "message: 'Attempt to GO to non-existing tag " n "'"
- "})" *newline*))
+ "throw ({"
+ "type: 'tagbody', "
+ "id: " (first (binding-translation b)) ", "
+ "label: " (second (binding-translation b)) ", "
+ "message: 'Attempt to GO to non-existing tag " n "'"
+ "})" *newline*)
(error (concat "Unknown tag `" n "'.")))))
(define-compilation unwind-protect (form &rest clean-up)
- (concat "(function(){" *newline*
- (indent "var ret = " (ls-compile nil) ";" *newline*
- "try {" *newline*
- (indent "ret = " (ls-compile form env) ";" *newline*)
- "} finally {" *newline*
- (indent (ls-compile-block clean-up env))
- "}" *newline*
- "return ret;" *newline*)
- "})()"))
+ (js!selfcall
+ "var ret = " (ls-compile nil) ";" *newline*
+ "try {" *newline*
+ (indent "ret = " (ls-compile form env) ";" *newline*)
+ "} finally {" *newline*
+ (indent (ls-compile-block clean-up env))
+ "}" *newline*
+ "return ret;" *newline*))
;;; A little backquote implementation without optimizations of any
(let ,(mapcar (lambda (arg) `(,arg (ls-compile ,arg env))) args)
,@body)))
-(defun compile-bool (x)
- (concat "(" x "?" (ls-compile t) ": " (ls-compile nil) ")"))
-
;;; DECLS is a list of (JSVARNAME TYPE LISPFORM) declarations.
(defmacro type-check (decls &body body)
- `(concat "(function(){" *newline*
- (indent ,@(mapcar (lambda (decl)
- `(concat "var " ,(first decl) " = " ,(third decl) ";" *newline*))
- decls)
-
- ,@(mapcar (lambda (decl)
- `(concat "if (typeof " ,(first decl) " != '" ,(second decl) "')" *newline*
- (indent "throw 'The value ' + "
- ,(first decl)
- " + ' is not a type "
- ,(second decl)
- ".';"
- *newline*)))
- decls)
- (concat "return " (progn ,@body) ";" *newline*))
- "})()"))
+ `(js!selfcall
+ ,@(mapcar (lambda (decl)
+ `(concat "var " ,(first decl) " = " ,(third decl) ";" *newline*))
+ decls)
+ ,@(mapcar (lambda (decl)
+ `(concat "if (typeof " ,(first decl) " != '" ,(second decl) "')" *newline*
+ (indent "throw 'The value ' + "
+ ,(first decl)
+ " + ' is not a type "
+ ,(second decl)
+ ".';"
+ *newline*)))
+ decls)
+ (concat "return " (progn ,@body) ";" *newline*)))
(defun num-op-num (x op y)
(type-check (("x" "number" x) ("y" "number" y))
(define-builtin mod (x y) (num-op-num x "%" y))
-(define-builtin < (x y) (compile-bool (num-op-num x "<" y)))
-(define-builtin > (x y) (compile-bool (num-op-num x ">" y)))
-(define-builtin = (x y) (compile-bool (num-op-num x "==" y)))
-(define-builtin <= (x y) (compile-bool (num-op-num x "<=" y)))
-(define-builtin >= (x y) (compile-bool (num-op-num x ">=" y)))
+(define-builtin < (x y) (js!bool (num-op-num x "<" y)))
+(define-builtin > (x y) (js!bool (num-op-num x ">" y)))
+(define-builtin = (x y) (js!bool (num-op-num x "==" y)))
+(define-builtin <= (x y) (js!bool (num-op-num x "<=" y)))
+(define-builtin >= (x y) (js!bool (num-op-num x ">=" y)))
(define-builtin numberp (x)
- (compile-bool (concat "(typeof (" x ") == \"number\")")))
+ (js!bool (concat "(typeof (" x ") == \"number\")")))
(define-builtin floor (x)
(type-check (("x" "number" x))
(define-builtin cons (x y) (concat "({car: " x ", cdr: " y "})"))
(define-builtin consp (x)
- (compile-bool
- (concat "(function(){" *newline*
- (indent "var tmp = " x ";" *newline*
- "return (typeof tmp == 'object' && 'car' in tmp);" *newline*)
- "})()")))
+ (js!bool
+ (js!selfcall
+ "var tmp = " x ";" *newline*
+ "return (typeof tmp == 'object' && 'car' in tmp);" *newline*)))
(define-builtin car (x)
- (concat "(function(){" *newline*
- (indent "var tmp = " x ";" *newline*
- "return tmp === " (ls-compile nil)
- "? " (ls-compile nil)
- ": tmp.car;" *newline*)
- "})()"))
+ (js!selfcall
+ "var tmp = " x ";" *newline*
+ "return tmp === " (ls-compile nil)
+ "? " (ls-compile nil)
+ ": tmp.car;" *newline*))
(define-builtin cdr (x)
- (concat "(function(){" *newline*
- (indent "var tmp = " x ";" *newline*
- "return tmp === " (ls-compile nil) "? "
- (ls-compile nil)
- ": tmp.cdr;" *newline*)
- "})()"))
+ (js!selfcall
+ "var tmp = " x ";" *newline*
+ "return tmp === " (ls-compile nil) "? "
+ (ls-compile nil)
+ ": tmp.cdr;" *newline*))
(define-builtin setcar (x new)
(type-check (("x" "object" x))
(concat "(x.cdr = " new ")")))
(define-builtin symbolp (x)
- (compile-bool
- (concat "(function(){" *newline*
- (indent "var tmp = " x ";" *newline*
- "return (typeof tmp == 'object' && 'name' in tmp);" *newline*)
- "})()")))
+ (js!bool
+ (js!selfcall
+ "var tmp = " x ";" *newline*
+ "return (typeof tmp == 'object' && 'name' in tmp);" *newline*)))
(define-builtin make-symbol (name)
(type-check (("name" "string" name))
(define-builtin symbol-name (x)
(concat "(" x ").name"))
-(define-builtin eq (x y) (compile-bool (concat "(" x " === " y ")")))
-(define-builtin equal (x y) (compile-bool (concat "(" x " == " y ")")))
+(define-builtin set (symbol value)
+ (concat "(" symbol ").value =" value))
+
+(define-builtin symbol-value (x)
+ (concat "(" x ").value"))
+
+(define-builtin symbol-function (x)
+ (concat "(" x ").function"))
+
+(define-builtin eq (x y) (js!bool (concat "(" x " === " y ")")))
+(define-builtin equal (x y) (js!bool (concat "(" x " == " y ")")))
(define-builtin string (x)
(type-check (("x" "number" x))
"String.fromCharCode(x)"))
(define-builtin stringp (x)
- (compile-bool (concat "(typeof(" x ") == \"string\")")))
+ (js!bool (concat "(typeof(" x ") == \"string\")")))
(define-builtin string-upcase (x)
(type-check (("x" "string" x))
"x.length"))
(define-compilation slice (string a &optional b)
- (concat "(function(){" *newline*
- (indent "var str = " (ls-compile string env) ";" *newline*
- "var a = " (ls-compile a env) ";" *newline*
- "var b;" *newline*
- (if b
- (concat "b = " (ls-compile b env) ";" *newline*)
- "")
- "return str.slice(a,b);" *newline*)
- "})()"))
+ (js!selfcall
+ "var str = " (ls-compile string env) ";" *newline*
+ "var a = " (ls-compile a env) ";" *newline*
+ "var b;" *newline*
+ (if b
+ (concat "b = " (ls-compile b env) ";" *newline*)
+ "")
+ "return str.slice(a,b);" *newline*))
(define-builtin char (string index)
(type-check (("string" "string" string)
(concat "(" (ls-compile func env) ")()")
(let ((args (butlast args))
(last (car (last args))))
- (concat "(function(){" *newline*
- (indent "var f = " (ls-compile func env) ";" *newline*
- "var args = [" (join (mapcar (lambda (x)
- (ls-compile x env))
- args)
- ", ")
- "];" *newline*
- "var tail = (" (ls-compile last env) ");" *newline*
- (indent "while (tail != " (ls-compile nil) "){" *newline*
- " args.push(tail.car);" *newline*
- " tail = tail.cdr;" *newline*
- "}" *newline*
- "return f.apply(this, args);" *newline*)
- "})()")))))
+ (js!selfcall
+ "var f = " (ls-compile func env) ";" *newline*
+ "var args = [" (join (mapcar (lambda (x)
+ (ls-compile x env))
+ args)
+ ", ")
+ "];" *newline*
+ "var tail = (" (ls-compile last env) ");" *newline*
+ "while (tail != " (ls-compile nil) "){" *newline*
+ " args.push(tail.car);" *newline*
+ " tail = tail.cdr;" *newline*
+ "}" *newline*
+ "return f.apply(this, args);" *newline*))))
(define-builtin js-eval (string)
(type-check (("string" "string" string))
"eval.apply(window, [string])"))
(define-builtin error (string)
- (concat "(function (){ throw " string "; })()"))
+ (js!selfcall "throw " string ";" *newline*))
(define-builtin new () "{}")
-(define-builtin get (object key)
- (concat "(function(){" *newline*
- (indent "var tmp = " "(" object ")[" key "];" *newline*
- "return tmp == undefined? " (ls-compile nil) ": tmp ;" *newline*)
- "})()"))
+(define-builtin oget (object key)
+ (js!selfcall
+ "var tmp = " "(" object ")[" key "];" *newline*
+ "return tmp == undefined? " (ls-compile nil) ": tmp ;" *newline*))
-(define-builtin set (object key value)
+(define-builtin oset (object key value)
(concat "((" object ")[" key "] = " value ")"))
(define-builtin in (key object)
- (compile-bool (concat "((" key ") in (" object "))")))
+ (js!bool (concat "((" key ") in (" object "))")))
(define-builtin functionp (x)
- (compile-bool (concat "(typeof " x " == 'function')")))
+ (js!bool (concat "(typeof " x " == 'function')")))
(define-builtin write-string (x)
(type-check (("x" "string" x))
(defun ls-compile (sexp &optional (env (make-lexenv)))
(cond
- ((symbolp sexp) (lookup-variable-translation sexp env))
+ ((symbolp sexp)
+ (let ((b (lookup-variable sexp env)))
+ (ecase (binding-type b)
+ (lexical-variable
+ (lookup-variable-translation sexp env))
+ (special-variable
+ (ls-compile `(symbol-value ',sexp) env)))))
((integerp sexp) (integer-to-string sexp))
((stringp sexp) (concat "\"" (escape-string sexp) "\""))
((listp sexp)
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