X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fcode%2Fearly-extensions.lisp;h=13638c4f834e755f45506a9f717ba7b7f017e9c4;hb=70c579379283da66f97906a0d62c8a5fc34e4dab;hp=cf747759d74f05b50491bcdfd74c7a62549b34c8;hpb=dfae0cd85d45a30d8687d6a366b608d10350872f;p=sbcl.git

diff --git a/src/code/early-extensions.lisp b/src/code/early-extensions.lisp
index cf74775..13638c4 100644
--- a/src/code/early-extensions.lisp
+++ b/src/code/early-extensions.lisp
@@ -641,6 +641,7 @@
 ;;;; 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)))
 
@@ -796,29 +797,20 @@
      (%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))
@@ -1097,7 +1089,7 @@ which can be found at <http://sbcl.sourceforge.net/>.~:@>"
                (let ((it ,test)) (declare (ignorable it)),@body)
                (acond ,@rest))))))
 
-;;; (binding* ({(name initial-value [flag])}*) body)
+;;; (binding* ({(names initial-value [flag])}*) body)
 ;;; FLAG may be NIL or :EXIT-IF-NULL
 ;;;
 ;;; This form unites LET*, MULTIPLE-VALUE-BIND and AWHEN.
@@ -1115,7 +1107,15 @@ which can be found at <http://sbcl.sourceforge.net/>.~:@>"
                      (symbol
                       (values (list names) nil))
                      (list
-                      (values names nil)))
+                      (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
@@ -1166,3 +1166,17 @@ which can be found at <http://sbcl.sourceforge.net/>.~:@>"
 	(*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))))