syntax-quote and syntax-quasiquote should create identifiers at runtime,
not at compile time
This commit is contained in:
Yuichi Nishiwaki
parent
dbba29a5a8
commit
2c269b4f0e
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@ -294,38 +294,41 @@ my $src = <<'EOL';
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(define-macro syntax-quote
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(lambda (form env)
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(let ((renames '()))
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(letrec
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((wrap (let ((register (make-register)))
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(lambda (var)
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(let ((id (register var)))
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(if (undefined? id)
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(let ((id (make-identifier var env)))
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(register var id)
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id)
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id)))))
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((rename (lambda (var)
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(let ((x (assq var renames)))
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(if x
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(cadr x)
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(begin
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(set! renames `((,var ,(make-identifier var env) (,(the 'make-identifier) ',var ',env)) . ,renames))
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(rename var))))))
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(walk (lambda (f form)
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(cond
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((variable? form)
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(f form))
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((pair? form)
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(cons (walk f (car form)) (walk f (cdr form))))
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`(,(the 'cons) (walk f (car form)) (walk f (cdr form))))
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((vector? form)
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(list->vector (walk f (vector->list form))))
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`(,(the 'list->vector) (walk f (vector->list form))))
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(else
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form)))))
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(list the-quote (walk wrap (cadr form))))))
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`(,(the 'quote) ,form))))))
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(let ((form (walk rename (cadr form))))
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`(,(the 'let)
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,(map cdr renames)
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,form))))))
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(define-macro syntax-quasiquote
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(lambda (form env)
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(let ((renames '()))
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(letrec
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((wrap (let ((register (make-register)))
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(lambda (var)
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(let ((id (register var)))
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(if (undefined? id)
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(let ((id (make-identifier var env)))
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(register var id)
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id)
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id))))))
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((rename (lambda (var)
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(let ((x (assq var renames)))
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(if x
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(cadr x)
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(begin
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(set! renames `((,var ,(make-identifier var env) (,(the 'make-identifier) ',var ',env)) . ,renames))
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(rename var)))))))
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(define (syntax-quasiquote? form)
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(and (pair? form)
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@ -378,13 +381,15 @@ my $src = <<'EOL';
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(list (the 'list->vector) (qq depth (vector->list expr))))
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;; variable
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((variable? expr)
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(list (the 'quote) (wrap expr)))
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(rename expr))
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;; simple datum
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(else
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(list (the 'quote) expr))))
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(let ((x (cadr form)))
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(qq 1 x)))))
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(let ((body (qq 1 (cadr form))))
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`(,(the 'let)
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,(map cdr renames)
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,body))))))
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(define (transformer f)
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(lambda (form env)
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@ -629,79 +634,84 @@ const char pic_boot[][80] = {
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"v)\n (let ((formal (car (cdr form)))\n (body (cdr (cdr form))))\n",
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" `(,(the 'with-parameter)\n (,(the 'lambda) ()\n ,@forma",
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"l\n ,@body)))))\n\n (define-macro syntax-quote\n (lambda (form env)\n ",
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" (letrec\n ((wrap (let ((register (make-register)))\n ",
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" (lambda (var)\n (let ((id (register var)))\n ",
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" (if (undefined? id)\n (let ((id (make-identifier",
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" var env)))\n (register var id)\n ",
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" id)\n id)))))\n (walk (lambda (f form)",
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"\n (cond\n ((variable? form)\n ",
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" (f form))\n ((pair? form)\n (cons (wal",
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"k f (car form)) (walk f (cdr form))))\n ((vector? form)\n ",
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" (list->vector (walk f (vector->list form))))\n ",
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"(else\n form)))))\n (list the-quote (walk wrap (cadr fo",
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"rm))))))\n\n (define-macro syntax-quasiquote\n (lambda (form env)\n (letrec",
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"\n ((wrap (let ((register (make-register)))\n (lambda (",
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"var)\n (let ((id (register var)))\n (if ",
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"(undefined? id)\n (let ((id (make-identifier var env)))",
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"\n (register var id)\n id)",
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"\n id))))))\n\n (define (syntax-quasiquote? form)\n",
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" (let ((renames '()))\n (letrec\n ((rename (lambda (var)\n ",
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" (let ((x (assq var renames)))\n (if x\n",
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" (cadr x)\n (begin\n ",
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" (set! renames `((,var ,(make-identifier var env) (,(the",
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" 'make-identifier) ',var ',env)) . ,renames))\n (re",
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"name var))))))\n (walk (lambda (f form)\n (cond\n ",
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" ((variable? form)\n (f form))\n ",
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" ((pair? form)\n `(,(the 'cons) (walk f (car fo",
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"rm)) (walk f (cdr form))))\n ((vector? form)\n ",
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" `(,(the 'list->vector) (walk f (vector->list form))))\n ",
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" (else\n `(,(the 'quote) ,form))))))\n (let ((fo",
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"rm (walk rename (cadr form))))\n `(,(the 'let)\n ,(map cdr",
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" renames)\n ,form))))))\n\n (define-macro syntax-quasiquote\n (lamb",
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"da (form env)\n (let ((renames '()))\n (letrec\n ((rename (l",
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"ambda (var)\n (let ((x (assq var renames)))\n ",
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" (if x\n (cadr x)\n ",
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" (begin\n (set! renames `((,var ,(make-identifier",
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" var env) (,(the 'make-identifier) ',var ',env)) . ,renames))\n ",
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" (rename var)))))))\n\n (define (syntax-quasiquote? form)\n ",
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" (and (pair? form)\n (variable? (car form))\n ",
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" (variable=? (the 'syntax-quasiquote) (make-identifier (car form) env))))\n\n ",
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" (define (syntax-unquote? form)\n (and (pair? form)\n (va",
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"riable? (car form))\n (variable=? (the 'syntax-unquote) (make-ident",
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"ifier (car form) env))))\n\n (define (syntax-unquote-splicing? form)\n ",
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" (and (pair? form)\n (pair? (car form))\n (variable",
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"? (caar form))\n (variable=? (the 'syntax-unquote-splicing) (make-i",
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"dentifier (caar form) env))))\n\n (define (qq depth expr)\n (cond\n ",
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" ;; syntax-unquote\n ((syntax-unquote? expr)\n (if (",
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"= depth 1)\n (car (cdr expr))\n (list (the 'list)\n ",
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" (list (the 'quote) (the 'syntax-unquote))\n ",
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" (qq (- depth 1) (car (cdr expr))))))\n ;; syntax-unquote-splicing\n ",
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" ((syntax-unquote-splicing? expr)\n (if (= depth 1)\n ",
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" (list (the 'append)\n (car (cdr (car expr)))\n ",
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" (qq depth (cdr expr)))\n (list (the 'cons)\n ",
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" (list (the 'list)\n (list (the 'quote) (t",
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"he 'syntax-unquote-splicing))\n (qq (- depth 1) (car (",
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"cdr (car expr)))))\n (qq depth (cdr expr)))))\n ;; ",
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"syntax-quasiquote\n ((syntax-quasiquote? expr)\n (list (the '",
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"list)\n (list (the 'quote) (the 'quasiquote))\n ",
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"(qq (+ depth 1) (car (cdr expr)))))\n ;; list\n ((pair? expr)\n",
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" (define (syntax-unquote? form)\n (and (pair? form)\n ",
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" (variable? (car form))\n (variable=? (the 'syntax-unquote) ",
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"(make-identifier (car form) env))))\n\n (define (syntax-unquote-splicing?",
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" form)\n (and (pair? form)\n (pair? (car form))\n ",
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" (variable? (caar form))\n (variable=? (the 'syntax-unqu",
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"ote-splicing) (make-identifier (caar form) env))))\n\n (define (qq depth ",
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"expr)\n (cond\n ;; syntax-unquote\n ((syntax-unq",
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"uote? expr)\n (if (= depth 1)\n (car (cdr expr))\n ",
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" (list (the 'list)\n (list (the 'quote) (the",
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" 'syntax-unquote))\n (qq (- depth 1) (car (cdr expr))))))\n",
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" ;; syntax-unquote-splicing\n ((syntax-unquote-splicing? ",
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"expr)\n (if (= depth 1)\n (list (the 'append)\n ",
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" (car (cdr (car expr)))\n (qq depth (cdr ",
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"expr)))\n (list (the 'cons)\n (list (the '",
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"list)\n (list (the 'quote) (the 'syntax-unquote-spli",
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"cing))\n (qq (- depth 1) (car (cdr (car expr)))))\n ",
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" (qq depth (cdr expr)))))\n ;; syntax-quasiquote",
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"\n ((syntax-quasiquote? expr)\n (list (the 'list)\n ",
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" (list (the 'quote) (the 'quasiquote))\n (qq (+ de",
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"pth 1) (car (cdr expr)))))\n ;; list\n ((pair? expr)\n ",
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" (list (the 'cons)\n (qq depth (car expr))\n ",
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" (qq depth (cdr expr))))\n ;; vector\n ((vector? expr)\n",
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" (list (the 'list->vector) (qq depth (vector->list expr))))\n ",
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" ;; variable\n ((variable? expr)\n (list (the 'quote) (wrap ",
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"expr)))\n ;; simple datum\n (else\n (list (the 'quot",
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"e) expr))))\n\n (let ((x (cadr form)))\n (qq 1 x)))))\n\n (define (t",
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"ransformer f)\n (lambda (form env)\n (let ((register1 (make-register))\n ",
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" (register2 (make-register)))\n (letrec\n ((wrap (lambda",
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" (var1)\n (let ((var2 (register1 var1)))\n ",
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" (if (undefined? var2)\n (let ((var2 (make-identifier",
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" var1 env)))\n (register1 var1 var2)\n ",
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" (qq depth (cdr expr))))\n ;; vector\n ((vector? e",
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"xpr)\n (list (the 'list->vector) (qq depth (vector->list expr))))\n ",
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" ;; variable\n ((variable? expr)\n (rename expr",
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"))\n ;; simple datum\n (else\n (list (the 'quo",
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"te) expr))))\n\n (let ((body (qq 1 (cadr form))))\n `(,(the 'le",
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"t)\n ,(map cdr renames)\n ,body))))))\n\n (define (transf",
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"ormer f)\n (lambda (form env)\n (let ((register1 (make-register))\n ",
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" (register2 (make-register)))\n (letrec\n ((wrap (lambda (var",
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"1)\n (let ((var2 (register1 var1)))\n (i",
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"f (undefined? var2)\n (let ((var2 (make-identifier var1",
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" env)))\n (register1 var1 var2)\n ",
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" (register2 var2 var1)\n var2)\n ",
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" var2))))\n (unwrap (lambda (var2)\n ",
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" (let ((var1 (register2 var2)))\n (if (undefined? var",
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"1)\n var2\n var1))))\n ",
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" (walk (lambda (f form)\n (cond\n ",
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"((variable? form)\n (f form))\n ((pair?",
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" form)\n (cons (walk f (car form)) (walk f (cdr form))))\n ",
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" ((vector? form)\n (list->vector (walk f",
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" (vector->list form))))\n (else\n form)",
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"))))\n (let ((form (cdr form)))\n (walk unwrap (apply f (walk ",
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"wrap form))))))))\n\n (define-macro define-syntax\n (lambda (form env)\n (l",
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"et ((formal (car (cdr form)))\n (body (cdr (cdr form))))\n (if",
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" (pair? formal)\n `(,(the 'define-syntax) ,(car formal) (,the-lambda ,",
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"(cdr formal) ,@body))\n `(,the-define-macro ,formal (,(the 'transforme",
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"r) (,the-begin ,@body)))))))\n\n (define-macro letrec-syntax\n (lambda (form en",
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"v)\n (let ((formal (car (cdr form)))\n (body (cdr (cdr form))))\n",
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" `(let ()\n ,@(map (lambda (x)\n `(,(the 'defi",
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"ne-syntax) ,(car x) ,(cadr x)))\n formal)\n ,@body))))\n",
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"\n (define-macro let-syntax\n (lambda (form env)\n `(,(the 'letrec-syntax)",
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" ,@(cdr form))))\n\n (export let let* letrec letrec*\n let-values let*-va",
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"lues define-values\n quasiquote unquote unquote-splicing\n and o",
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"r\n cond case else =>\n do when unless\n parameterize\n ",
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" define-syntax\n syntax-quote syntax-unquote\n syntax-qua",
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"siquote syntax-unquote-splicing\n let-syntax letrec-syntax\n syn",
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"tax-error))\n\n",
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"(let ((var1 (register2 var2)))\n (if (undefined? var1)\n ",
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" var2\n var1))))\n ",
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" (walk (lambda (f form)\n (cond\n ((var",
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"iable? form)\n (f form))\n ((pair? form",
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")\n (cons (walk f (car form)) (walk f (cdr form))))\n ",
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" ((vector? form)\n (list->vector (walk f (vec",
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"tor->list form))))\n (else\n form)))))\n",
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" (let ((form (cdr form)))\n (walk unwrap (apply f (walk wrap ",
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"form))))))))\n\n (define-macro define-syntax\n (lambda (form env)\n (let ((",
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"formal (car (cdr form)))\n (body (cdr (cdr form))))\n (if (pai",
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"r? formal)\n `(,(the 'define-syntax) ,(car formal) (,the-lambda ,(cdr ",
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"formal) ,@body))\n `(,the-define-macro ,formal (,(the 'transformer) (,",
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"the-begin ,@body)))))))\n\n (define-macro letrec-syntax\n (lambda (form env)\n ",
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" (let ((formal (car (cdr form)))\n (body (cdr (cdr form))))\n ",
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" `(let ()\n ,@(map (lambda (x)\n `(,(the 'define-sy",
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"ntax) ,(car x) ,(cadr x)))\n formal)\n ,@body))))\n\n (d",
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"efine-macro let-syntax\n (lambda (form env)\n `(,(the 'letrec-syntax) ,@(c",
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"dr form))))\n\n (export let let* letrec letrec*\n let-values let*-values ",
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"define-values\n quasiquote unquote unquote-splicing\n and or\n ",
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" cond case else =>\n do when unless\n parameterize\n ",
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" define-syntax\n syntax-quote syntax-unquote\n syntax-quasiquo",
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"te syntax-unquote-splicing\n let-syntax letrec-syntax\n syntax-e",
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"rror))\n\n",
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"",
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""
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};
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