;;; 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
+
+ 'defmacro
(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-defmacro ',name
+ '(lambda ,(mapcar (lambda (x)
+ (if (eq x '&body)
+ '&rest
+ x))
+ args)
+ ,@body)))
+ ',name))))
+
+ (defmacro defvar (name value)
`(progn
- (eval-when-compile
- (%compile-defvar ',name))
- (setq ,name ,value)))
-
- (defmacro defvar (name &optional value)
- `(%defvar ,name ,value))
+ (setq ,name ,value)
+ ',name))
- (defmacro named-lambda (name args &rest body)
+ (defmacro named-lambda (name args &body body)
(let ((x (gensym "FN")))
`(let ((,x (lambda ,args ,@body)))
(oset ,x "fname" ,name)
,x)))
- (defmacro %defun (name args &rest body)
+ (defmacro defun (name args &body body)
`(progn
(eval-when-compile
(%compile-defun ',name))
(fsetq ,name (named-lambda ,(symbol-name name) ,args
- (block ,name ,@body)))))
-
- (defmacro defun (name args &rest body)
- `(%defun ,name ,args ,@body))
+ (block ,name ,@body)))
+ ',name))
(defvar *package* (new))
- (defvar nil (make-symbol "NIL"))
- (oset *package* "NIL" nil)
-
- (defvar t (make-symbol "T"))
- (oset *package* "T" t)
+ (defvar nil 'nil)
+ (defvar t 't)
(defun null (x)
(eq x nil))
,value)))
(defmacro prog2 (form1 result &body body)
- `(prog1 (progn ,form1 ,result) ,@body))
+ `(prog1 (progn ,form1 ,result) ,@body)))
-)
-
;;; This couple of helper functions will be defined in both Common
;;; Lisp and in Ecmalisp.
(defun ensure-list (x)
;;; 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
""
(concat (car list) separator (join-trailing (cdr list) separator))))
+(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
(write-string *newline*)
x)
+ (defun warn (string)
+ (write-string "WARNING: ")
+ (write-line string))
+
(defun print (x)
(write-line (prin1-to-string x))
x))
(defun gvarname (symbol)
(concat "v" (integer-to-string (incf *variable-counter*))))
-(defun lookup-variable (symbol env)
- (or (lookup-in-lexenv symbol env 'variable)
- (lookup-in-lexenv symbol *environment* 'variable)
- (let ((name (symbol-name symbol))
- (binding (make-binding symbol 'special-variable (gvarname symbol) nil)))
- (push-to-lexenv binding *environment* 'variable)
- (push (lambda ()
- (let ((b (lookup-in-lexenv symbol *environment* 'variable)))
- (unless (binding-declared b)
- (error (concat "Undefined variable `" name "'")))))
- *compilation-unit-checks*)
- binding)))
-
-(defun lookup-variable-translation (symbol env)
- (binding-translation (lookup-variable symbol env)))
+(defun translate-variable (symbol env)
+ (binding-translation (lookup-in-lexenv symbol env 'variable)))
(defun extend-local-env (args env)
(let ((new (copy-lexenv env)))
(defun lookup-function-translation (symbol env)
(binding-translation (lookup-function symbol env)))
+;;; Toplevel compilations
(defvar *toplevel-compilations* nil)
-(defun %compile-defvar (name)
- (let ((b (lookup-variable name *environment*)))
- (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 get-toplevel-compilations ()
+ (reverse (remove-if #'null-or-empty-p *toplevel-compilations*)))
(defun %compile-defun (name)
(let ((b (lookup-function name *environment*)))
(mark-binding-as-declared b)
- (push (concat "var " (binding-translation b)) *toplevel-compilations*)))
+ (toplevel-compilation (concat "var " (binding-translation b)))))
(defun %compile-defmacro (name lambda)
(push-to-lexenv (make-binding name 'macro lambda t) *environment* 'function))
(defun ls-compile-block (sexps env)
(join-trailing
- (remove-if (lambda (x)
- (or (null x)
- (and (stringp x)
- (zerop (length x)))))
+ (remove-if #'null
(mapcar (lambda (x) (ls-compile x env)) sexps))
(concat ";" *newline*)))
env)))
(concat "(function ("
(join (mapcar (lambda (x)
- (lookup-variable-translation x new-env))
+ (translate-variable x new-env))
(append required-arguments optional-arguments))
",")
"){" *newline*
(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)
+ (translate-variable (car arg) new-env)
"="
(ls-compile (cadr arg) new-env)
";" *newline*)
"")
;; &rest/&body argument
(if rest-argument
- (let ((js!rest (lookup-variable-translation rest-argument new-env)))
+ (let ((js!rest (translate-variable rest-argument new-env)))
(concat "var " js!rest "= " (ls-compile nil) ";" *newline*
"for (var i = arguments.length-1; i>="
(integer-to-string (+ n-required-arguments n-optional-arguments))
(ls-compile val env)))
(define-compilation setq (var val)
- (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)))))
+ (let ((b (lookup-in-lexenv var env 'variable)))
+ (if (eq (binding-type b) 'lexical-variable)
+ (concat (binding-translation b) " = " (ls-compile val env))
+ (ls-compile `(set ',var ,val) env))))
+
+;;; FFI Variable accessors
+(define-compilation js-vref (var)
+ var)
+
+(define-compilation js-vset (var val)
+ (concat "(" var " = " (ls-compile val env) ")"))
;;; Literals
(incf index))
output))
-(defun literal->js (sexp)
+
+(defvar *literal-symbols* nil)
+(defvar *literal-counter* 0)
+
+(defun genlit ()
+ (concat "l" (integer-to-string (incf *literal-counter*))))
+
+(defun literal (sexp &optional recursive)
(cond
((integerp sexp) (integer-to-string sexp))
((stringp sexp) (concat "\"" (escape-string sexp) "\""))
- ((symbolp sexp) (ls-compile `(intern ,(escape-string (symbol-name sexp))) *environment*))
- ((consp sexp) (concat "{car: "
- (literal->js (car sexp))
- ", cdr: "
- (literal->js (cdr sexp)) "}"))))
-
-(defvar *literal-counter* 0)
-(defun literal (form)
- (let ((var (concat "l" (integer-to-string (incf *literal-counter*)))))
- (push (concat "var " var " = " (literal->js form)) *toplevel-compilations*)
- var))
+ ((symbolp sexp)
+ #+common-lisp
+ (or (cdr (assoc sexp *literal-symbols*))
+ (let ((v (genlit))
+ (s (concat "{name: \"" (escape-string (symbol-name sexp)) "\"}")))
+ (push (cons sexp v) *literal-symbols*)
+ (toplevel-compilation (concat "var " v " = " s))
+ v))
+ #+ecmalisp
+ (let ((v (genlit))
+ (s (ls-compile `(intern ,(symbol-name sexp)))))
+ (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)
(js!selfcall
"while(" (ls-compile pred env) " !== " (ls-compile nil) "){" *newline*
(define-compilation eval-when-compile (&rest body)
(eval (cons 'progn body))
- "")
+ nil)
(defmacro define-transformation (name args form)
`(define-compilation ,name ,args
(let ((new-env (extend-local-env variables env)))
(concat "(function("
(join (mapcar (lambda (x)
- (lookup-variable-translation x new-env))
+ (translate-variable x new-env))
variables)
",")
"){" *newline*
(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)
(js!bool
(js!selfcall
(concat "(" symbol ").value =" value))
(define-builtin symbol-value (x)
- (concat "(" x ").value"))
+ (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)
(concat "(" x ").function"))
(defun ls-compile (sexp &optional (env (make-lexenv)))
(cond
((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)))))
+ (let ((b (lookup-in-lexenv sexp env 'variable)))
+ (if (eq (binding-type b) 'lexical-variable)
+ (binding-translation b)
+ (ls-compile `(symbol-value ',sexp) env))))
((integerp sexp) (integer-to-string sexp))
((stringp sexp) (concat "\"" (escape-string sexp) "\""))
((listp sexp)
(defun ls-compile-toplevel (sexp)
(setq *toplevel-compilations* nil)
- (let ((code (ls-compile sexp)))
- (prog1
- (concat (join (mapcar (lambda (x) (concat x ";" *newline*))
- *toplevel-compilations*))
- code)
- (setq *toplevel-compilations* nil))))
+ (cond
+ ((and (consp sexp) (eq (car sexp) 'progn))
+ (let ((subs (mapcar #'ls-compile-toplevel (cdr sexp))))
+ (join (remove-if #'null-or-empty-p subs))))
+ (t
+ (let ((code (ls-compile sexp)))
+ (prog1
+ (concat (join-trailing (get-toplevel-compilations) (concat ";" *newline*))
+ (if code
+ (concat code ";" *newline*)
+ ""))
+ (setq *toplevel-compilations* nil))))))
;;; Once we have the compiler, we define the runtime environment and
(ls-compile-toplevel x))))
(js-eval code)))
+ (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
- (let ((tmp (ls-compile
- `(progn
- (setq *environment* ',*environment*)
- (setq *variable-counter* ',*variable-counter*)
- (setq *function-counter* ',*function-counter*)
- (setq *literal-counter* ',*literal-counter*)
- (setq *gensym-counter* ',*gensym-counter*)
- (setq *block-counter* ',*block-counter*)))))
- (setq *toplevel-compilations*
- (append *toplevel-compilations* (list tmp)))))
-
- (js-eval
- (concat "var lisp = {};"
- "lisp.read = " (lookup-function-translation 'ls-read-from-string nil) ";" *newline*
- "lisp.print = " (lookup-function-translation 'prin1-to-string nil) ";" *newline*
- "lisp.eval = " (lookup-function-translation 'eval nil) ";" *newline*
- "lisp.compile = " (lookup-function-translation 'ls-compile-toplevel nil) ";" *newline*
- "lisp.evalString = function(str){" *newline*
- " return lisp.eval(lisp.read(str));" *newline*
- "}" *newline*
- "lisp.compileString = function(str){" *newline*
- " return lisp.compile(lisp.read(str));" *newline*
- "}" *newline*)))
+ (toplevel-compilation
+ (ls-compile
+ `(progn
+ ,@(mapcar (lambda (s)
+ `(oset *package* ,(symbol-name (car s))
+ (js-vref ,(cdr s))))
+ *literal-symbols*)
+ (setq *environment* ',*environment*)
+ (setq *variable-counter* ,*variable-counter*)
+ (setq *function-counter* ,*function-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
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
projects / jscl.git / blobdiff