(t `(values ,@(cdr result) &optional)))))
`(function ,args ,result)))
+;;; a type specifier
+;;;
+;;; FIXME: The SB!KERNEL:INSTANCE here really means CL:CLASS.
+;;; However, the CL:CLASS type is only defined once PCL is loaded,
+;;; which is before this is evaluated. Once PCL is moved into cold
+;;; init, this might be fixable.
+(def!type type-specifier () '(or list symbol sb!kernel:instance))
+
;;; the default value used for initializing character data. The ANSI
;;; spec says this is arbitrary, so we use the value that falls
;;; through when we just let the low-level consing code initialize
;; just define ASSQ explicitly in terms of more primitive
;; operations:
(dolist (pair alist)
- (when (eq (car pair) item)
+ ;; though it may look more natural to write this as
+ ;; (AND PAIR (EQ (CAR PAIR) ITEM))
+ ;; the temptation to do so should be resisted, as pointed out by PFD
+ ;; sbcl-devel 2003-08-16, as NIL elements are rare in association
+ ;; lists. -- CSR, 2003-08-16
+ (when (and (eq (car pair) item) (not (null pair)))
(return pair))))
;;; like (DELETE .. :TEST #'EQ):
;;; Iterate over the entries in a HASH-TABLE.
(defmacro dohash ((key-var value-var table &optional result) &body body)
- (multiple-value-bind (forms decls) (parse-body body nil)
+ (multiple-value-bind (forms decls) (parse-body body :doc-string-allowed nil)
(let ((gen (gensym))
(n-more (gensym)))
`(with-hash-table-iterator (,gen ,table)
(defmacro define-cached-synonym
(name &optional (original (symbolicate "%" name)))
- (let ((cached-name (symbolicate "%%" name "-cached")))
+ (let ((cached-name (symbolicate "%%" name "-CACHED")))
`(progn
(defun-cached (,cached-name :hash-bits 8
:hash-function (lambda (x)
;;;; various operations on names
;;; Is NAME a legal function name?
+(declaim (inline legal-fun-name-p))
(defun legal-fun-name-p (name)
(values (valid-function-name-p name)))
(unless (legal-fun-name-p name)
(error 'simple-type-error
:datum name
- :expected-type '(or symbol list)
+ :expected-type '(or symbol (cons (member setf) (cons symbol null)))
:format-control "invalid function name: ~S"
:format-arguments (list name))))
(%failed-aver ,(format nil "~A" expr))))
(defun %failed-aver (expr-as-string)
+ ;; hackish way to tell we're in a cold sbcl and output the
+ ;; message before signallign error, as it may be this is too
+ ;; early in the cold init.
+ (when (find-package "SB!C")
+ (fresh-line)
+ (write-line "failed AVER:")
+ (write-line expr-as-string)
+ (terpri))
(bug "~@<failed AVER: ~2I~_~S~:>" expr-as-string))
-;;; We need a definition of BUG here for the host compiler to be able
-;;; to deal with BUGs in sbcl. This should never affect an end-user,
-;;; who will pick up the definition that signals a CONDITION of
-;;; condition-class BUG; however, this is not defined on the host
-;;; lisp, but for the target. SBCL developers sometimes trigger BUGs
-;;; in their efforts, and it is useful to get the details of the BUG
-;;; rather than an undefined function error. - CSR, 2002-04-12
-#+sb-xc-host
(defun bug (format-control &rest format-arguments)
- (error 'simple-error
- :format-control "~@< ~? ~:@_~?~:>"
- :format-arguments `(,format-control
- ,format-arguments
- "~@<If you see this and are an SBCL ~
-developer, then it is probable that you have made a change to the ~
-system that has broken the ability for SBCL to compile, usually by ~
-removing an assumed invariant of the system, but sometimes by making ~
-an averrance that is violated (check your code!). If you are a user, ~
-please submit a bug report to the developers' mailing list, details of ~
-which can be found at <http://sbcl.sourceforge.net/>.~:@>"
- ())))
+ (error 'bug
+ :format-control format-control
+ :format-arguments format-arguments))
(defmacro enforce-type (value type)
(once-only ((value value))
(%failed-enforce-type ,value ',type))))
(defun %failed-enforce-type (value type)
- (error 'simple-type-error ; maybe should be TYPE-BUG, subclass of BUG?
- :value value
+ ;; maybe should be TYPE-BUG, subclass of BUG? If it is changed,
+ ;; check uses of it in user-facing code (e.g. WARN)
+ (error 'simple-type-error
+ :datum value
:expected-type type
- :format-string "~@<~S ~_is not a ~_~S~:>"
+ :format-control "~@<~S ~_is not a ~_~S~:>"
:format-arguments (list value type)))
\f
;;; Return a function like FUN, but expecting its (two) arguments in
(let ((it ,test)) (declare (ignorable it)),@body)
(acond ,@rest))))))
+;;; (binding* ({(names initial-value [flag])}*) body)
+;;; FLAG may be NIL or :EXIT-IF-NULL
+;;;
+;;; This form unites LET*, MULTIPLE-VALUE-BIND and AWHEN.
+(defmacro binding* ((&rest bindings) &body body)
+ (let ((bindings (reverse bindings)))
+ (loop with form = `(progn ,@body)
+ for binding in bindings
+ do (destructuring-bind (names initial-value &optional flag)
+ binding
+ (multiple-value-bind (names declarations)
+ (etypecase names
+ (null
+ (let ((name (gensym)))
+ (values (list name) `((declare (ignorable ,name))))))
+ (symbol
+ (values (list names) nil))
+ (list
+ (collect ((new-names) (ignorable))
+ (dolist (name names)
+ (when (eq name nil)
+ (setq name (gensym))
+ (ignorable name))
+ (new-names name))
+ (values (new-names)
+ (when (ignorable)
+ `((declare (ignorable ,@(ignorable)))))))))
+ (setq form `(multiple-value-bind ,names
+ ,initial-value
+ ,@declarations
+ ,(ecase flag
+ ((nil) form)
+ ((:exit-if-null)
+ `(when ,(first names) ,form)))))))
+ finally (return form))))
\f
;;; Delayed evaluation
(defmacro delay (form)
(defun promise-ready-p (promise)
(or (not (consp promise))
(car promise)))
+\f
+;;; toplevel helper
+(defmacro with-rebound-io-syntax (&body body)
+ `(%with-rebound-io-syntax (lambda () ,@body)))
+
+(defun %with-rebound-io-syntax (function)
+ (declare (type function function))
+ (let ((*package* *package*)
+ (*print-array* *print-array*)
+ (*print-base* *print-base*)
+ (*print-case* *print-case*)
+ (*print-circle* *print-circle*)
+ (*print-escape* *print-escape*)
+ (*print-gensym* *print-gensym*)
+ (*print-length* *print-length*)
+ (*print-level* *print-level*)
+ (*print-lines* *print-lines*)
+ (*print-miser-width* *print-miser-width*)
+ (*print-pretty* *print-pretty*)
+ (*print-radix* *print-radix*)
+ (*print-readably* *print-readably*)
+ (*print-right-margin* *print-right-margin*)
+ (*read-base* *read-base*)
+ (*read-default-float-format* *read-default-float-format*)
+ (*read-eval* *read-eval*)
+ (*read-suppress* *read-suppress*)
+ (*readtable* *readtable*))
+ (funcall function)))
+
+;;; Bind a few "potentially dangerous" printer control variables to
+;;; safe values, respecting current values if possible.
+(defmacro with-sane-io-syntax (&body forms)
+ `(call-with-sane-io-syntax (lambda () ,@forms)))
+
+(defun call-with-sane-io-syntax (function)
+ (declare (type function function))
+ (macrolet ((true (sym)
+ `(and (boundp ',sym) ,sym)))
+ (let ((*print-readably* nil)
+ (*print-level* (or (true *print-level*) 6))
+ (*print-length* (or (true *print-length*) 12)))
+ (funcall function))))
projects / sbcl.git / blobdiff