- ((null rest-of-args))
- (let ((var (car rest-of-args)))
- (cond ((eq var '&whole)
- (cond ((and (cdr rest-of-args) (symbolp (cadr rest-of-args)))
- (setq rest-of-args (cdr rest-of-args))
- (push-let-binding (car rest-of-args) arg-list-name nil))
- (t
- (defmacro-error "&WHOLE" error-kind name))))
- ((eq var '&environment)
- (cond (env-illegal
- (error "&ENVIRONMENT is not valid with ~S." error-kind))
- ((not top-level)
- (error "&ENVIRONMENT is only valid at top level of ~
- lambda-list.")))
- (cond ((and (cdr rest-of-args) (symbolp (cadr rest-of-args)))
- (setq rest-of-args (cdr rest-of-args))
- (push-let-binding (car rest-of-args) env-arg-name nil)
- (setq env-arg-used t))
- (t
- (defmacro-error "&ENVIRONMENT" error-kind name))))
- ((or (eq var '&rest)
- (eq var '&body))
- (cond ((and (cdr rest-of-args) (symbolp (cadr rest-of-args)))
- (setq rest-of-args (cdr rest-of-args))
- (setq restp t)
- (push-let-binding (car rest-of-args) path nil))
- (t
- (defmacro-error (symbol-name var) error-kind name))))
- ((eq var '&optional)
- (setq now-processing :optionals))
- ((eq var '&key)
- (setq now-processing :keywords)
- (setq rest-name (gensym "KEYWORDS-"))
- (push rest-name *ignorable-vars*)
- (setq restp t)
- (push-let-binding rest-name path t))
- ((eq var '&allow-other-keys)
- (setq allow-other-keys-p t))
- ((eq var '&aux)
- (setq now-processing :auxs))
- ((listp var)
- (cond ; (since it's too early to use CASE)
- ((eq now-processing :required)
- (let ((sub-list-name (gensym "SUBLIST-")))
- (push-sub-list-binding sub-list-name `(car ,path) var
- name error-kind error-fun)
- (parse-defmacro-lambda-list var sub-list-name name
- error-kind error-fun))
- (setq path `(cdr ,path)
- minimum (1+ minimum)
- maximum (1+ maximum)))
- ((eq now-processing :optionals)
- (destructuring-bind (varname &optional initform supplied-p)
- var
- (push-optional-binding varname initform supplied-p
- `(not (null ,path)) `(car ,path)
- name error-kind error-fun))
- (setq path `(cdr ,path)
- maximum (1+ maximum)))
- ((eq now-processing :keywords)
- (let* ((keyword-given (consp (car var)))
- (variable (if keyword-given
- (cadar var)
- (car var)))
- (keyword (if keyword-given
- (caar var)
- (keywordicate variable)))
- (supplied-p (caddr var)))
- (push-optional-binding variable (cadr var) supplied-p
- `(keyword-supplied-p ',keyword
- ,rest-name)
- `(lookup-keyword ',keyword
- ,rest-name)
- name error-kind error-fun)
- (push keyword keys)))
- ((eq now-processing :auxs)
- (push-let-binding (car var) (cadr var) nil))))
- ((symbolp var)
- (cond ; (too early in bootstrapping to use CASE)
- ;; FIXME: ^ This "too early in bootstrapping" is no
- ;; longer an issue in current SBCL bootstrapping.
- ((eq now-processing :required)
- (push-let-binding var `(car ,path) nil)
- (setq minimum (1+ minimum)
- maximum (1+ maximum)
- path `(cdr ,path)))
- ((eq now-processing :optionals)
- (push-let-binding var `(car ,path) nil `(not (null ,path)))
- (setq path `(cdr ,path)
- maximum (1+ maximum)))
- ((eq now-processing :keywords)
- (let ((key (keywordicate var)))
- (push-let-binding var
- `(lookup-keyword ,key ,rest-name)
- nil)
- (push key keys)))
- ((eq now-processing :auxs)
- (push-let-binding var nil nil))))
- (t
- (error "non-symbol in lambda-list: ~S" var)))))
- (push `(unless ,(if restp
- ;; (If RESTP, then the argument list might be
- ;; dotted, in which case ordinary LENGTH won't
- ;; work.)
- `(list-of-length-at-least-p ,path-0 ,minimum)
- `(proper-list-of-length-p ,path-0 ,minimum ,maximum))
- ,(if (eq error-fun 'error)
- `(do-arg-count-error ',error-kind ',name ,path-0
- ',lambda-list ,minimum
- ,(unless restp maximum))
- `(,error-fun 'defmacro-ll-arg-count-error
- :kind ',error-kind
- ,@(when name `(:name ',name))
- :argument ,path-0
- :lambda-list ',lambda-list
- :minimum ,minimum
- ,@(unless restp
- `(:maximum ,maximum)))))
- *arg-tests*)
- (when keys
- (let ((problem (gensym "KEY-PROBLEM-"))
- (info (gensym "INFO-")))
- (push `(multiple-value-bind (,problem ,info)
- (verify-keywords ,rest-name
- ',keys
- ',allow-other-keys-p)
- (when ,problem
- (,error-fun
- 'defmacro-ll-broken-key-list-error
- :kind ',error-kind
- ,@(when name `(:name ',name))
- :problem ,problem
- :info ,info)))
- *arg-tests*)))
- (values env-arg-used minimum (if (null restp) maximum nil))))
+ ((null rest-of-args))
+ (macrolet ((process-sublist (var sublist-name path)
+ (once-only ((var var))
+ `(if (listp ,var)
+ (let ((sub-list-name (gensym ,sublist-name)))
+ (push-sub-list-binding sub-list-name ,path ,var
+ name context error-fun)
+ (parse-defmacro-lambda-list ,var sub-list-name name
+ context error-fun))
+ (push-let-binding ,var ,path nil))))
+ (normalize-singleton (var)
+ `(when (null (cdr ,var))
+ (setf (cdr ,var) (list *default-default*)))))
+ (let ((var (car rest-of-args)))
+ (typecase var
+ (list
+ (case now-processing
+ ((:required)
+ (when restp
+ (defmacro-error (format nil "required argument after ~A" restp)
+ context name))
+ (process-sublist var "SUBLIST-" `(car ,path))
+ (setq path `(cdr ,path)
+ minimum (1+ minimum)
+ maximum (1+ maximum)))
+ ((:optionals)
+ (normalize-singleton var)
+ (destructuring-bind (varname &optional initform supplied-p)
+ var
+ (push-optional-binding varname initform supplied-p
+ `(not (null ,path)) `(car ,path)
+ name context error-fun))
+ (setq path `(cdr ,path)
+ maximum (1+ maximum)))
+ ((:keywords)
+ (normalize-singleton var)
+ (let* ((keyword-given (consp (car var)))
+ (variable (if keyword-given
+ (cadar var)
+ (car var)))
+ (keyword (if keyword-given
+ (caar var)
+ (keywordicate variable)))
+ (supplied-p (caddr var)))
+ (push-optional-binding variable (cadr var) supplied-p
+ `(keyword-supplied-p ',keyword
+ ,rest-name)
+ `(lookup-keyword ',keyword
+ ,rest-name)
+ name context error-fun)
+ (push keyword keys)))
+ ((:auxs)
+ (push-let-binding (car var) (cadr var) nil))))
+ ((and symbol (not (eql nil)))
+ (case var
+ (&whole
+ (cond ((cdr rest-of-args)
+ (setq rest-of-args (cdr rest-of-args))
+ ;; Special case for compiler-macros: if car of
+ ;; the form is FUNCALL skip over it for
+ ;; destructuring, pretending cdr of the form is
+ ;; the actual form.
+ (when (eq context 'define-compiler-macro)
+ (push-let-binding
+ arg-list-name
+ arg-list-name
+ t
+ `(not (and (listp ,arg-list-name)
+ (eq 'funcall (car ,arg-list-name))))
+ `(setf ,arg-list-name (cdr ,arg-list-name))))
+ (process-sublist (car rest-of-args)
+ "WHOLE-LIST-" arg-list-name))
+ (t
+ (defmacro-error "&WHOLE" context name))))
+ (&environment
+ (cond (env-illegal
+ (error "&ENVIRONMENT is not valid with ~S." context))
+ ((not toplevel)
+ (error "&ENVIRONMENT is only valid at top level of ~
+ lambda-list."))
+ (env-arg-used
+ (error "Repeated &ENVIRONMENT.")))
+ (cond ((and (cdr rest-of-args) (symbolp (cadr rest-of-args)))
+ (setq rest-of-args (cdr rest-of-args))
+ (check-defmacro-arg (car rest-of-args))
+ (setq *env-var* (car rest-of-args)
+ env-arg-used t))
+ (t
+ (defmacro-error "&ENVIRONMENT" context name))))
+ ((&rest &body)
+ (cond ((or key-seen aux-seen)
+ (error "~A after ~A in ~A" var (or key-seen aux-seen) context))
+ ((and (not restp) (cdr rest-of-args))
+ (setq rest-of-args (cdr rest-of-args)
+ restp var)
+ (process-sublist (car rest-of-args) "REST-LIST-" path))
+ (t
+ (defmacro-error (symbol-name var) context name))))
+ (&optional
+ (when (or key-seen aux-seen restp)
+ (error "~A after ~A in ~A lambda-list." var (or key-seen aux-seen restp) context))
+ (when optional-seen
+ (error "Multiple ~A in ~A lambda list." var context))
+ (setq now-processing :optionals
+ optional-seen var))
+ (&key
+ (when aux-seen
+ (error "~A after ~A in ~A lambda-list." '&key '&aux context))
+ (when key-seen
+ (error "Multiple ~A in ~A lambda-list." '&key context))
+ (setf now-processing :keywords
+ rest-name (gensym "KEYWORDS-")
+ restp var
+ key-seen var)
+ (push rest-name *ignorable-vars*)
+ (push-let-binding rest-name path t))
+ (&allow-other-keys
+ (unless (eq now-processing :keywords)
+ (error "~A outside ~A section of lambda-list in ~A." var '&key context))
+ (when allow-other-keys-p
+ (error "Multiple ~A in ~A lambda-list." var context))
+ (setq allow-other-keys-p t))
+ (&aux
+ (when aux-seen
+ (error "Multiple ~A in ~A lambda-list." '&aux context))
+ (setq now-processing :auxs
+ aux-seen var))
+ ;; FIXME: Other lambda list keywords.
+ (t
+ (case now-processing
+ ((:required)
+ (when restp
+ (defmacro-error (format nil "required argument after ~A" restp)
+ context name))
+ (push-let-binding var `(car ,path) nil)
+ (setq minimum (1+ minimum)
+ maximum (1+ maximum)
+ path `(cdr ,path)))
+ ((:optionals)
+ (push-let-binding var `(car ,path) nil `(not (null ,path)))
+ (setq path `(cdr ,path)
+ maximum (1+ maximum)))
+ ((:keywords)
+ (let ((key (keywordicate var)))
+ (push-let-binding
+ var
+ `(lookup-keyword ,key ,rest-name)
+ nil
+ `(keyword-supplied-p ,key ,rest-name))
+ (push key keys)))
+ ((:auxs)
+ (push-let-binding var nil nil))))))
+ (t
+ (error "non-symbol in lambda-list: ~S" var))))))
+ (let (;; common subexpression, suitable for passing to functions
+ ;; which expect a MAXIMUM argument regardless of whether
+ ;; there actually is a maximum number of arguments
+ ;; (expecting MAXIMUM=NIL when there is no maximum)
+ (explicit-maximum (and (not restp) maximum)))
+ (unless (and restp (zerop minimum))
+ (push `(unless ,(if restp
+ ;; (If RESTP, then the argument list might be
+ ;; dotted, in which case ordinary LENGTH won't
+ ;; work.)
+ `(list-of-length-at-least-p ,path-0 ,minimum)
+ `(proper-list-of-length-p ,path-0 ,minimum ,maximum))
+ ,(if (eq error-fun 'error)
+ `(arg-count-error ',context ',name ,path-0
+ ',lambda-list ,minimum
+ ,explicit-maximum)
+ `(,error-fun 'arg-count-error
+ :kind ',context
+ ,@(when name `(:name ',name))
+ :args ,path-0
+ :lambda-list ',lambda-list
+ :minimum ,minimum
+ :maximum ,explicit-maximum)))
+ *arg-tests*))
+ (when key-seen
+ (let ((problem (gensym "KEY-PROBLEM-"))
+ (info (gensym "INFO-")))
+ (push `(multiple-value-bind (,problem ,info)
+ (verify-keywords ,rest-name
+ ',keys
+ ',allow-other-keys-p)
+ (when ,problem
+ (,error-fun
+ 'defmacro-lambda-list-broken-key-list-error
+ :kind ',context
+ ,@(when name `(:name ',name))
+ :problem ,problem
+ :info ,info)))
+ *arg-tests*)))
+ (values env-arg-used minimum explicit-maximum))))