restore old behaviour as the default for package variance

[sbcl.git] / doc / manual / beyond-ansi.texinfo

diff --git a/doc/manual/beyond-ansi.texinfo b/doc/manual/beyond-ansi.texinfo
index b365498..348208c 100644 (file)
--- a/doc/manual/beyond-ansi.texinfo
+++ b/doc/manual/beyond-ansi.texinfo
@@ -58,6 +58,9 @@ has been specified. Different packages can use same local nickname for
 different global names, or different local nickname for same global
 name.
 
 different global names, or different local nickname for same global
 name.
 

+Symbol @code{:package-local-nicknames} in @code{*features*} denotes the
+support for this feature.
+

 @findex @cl{defpackage}
 @defmac @cl{defpackage} name [[option]]* @result{} package
 
 @findex @cl{defpackage}
 @defmac @cl{defpackage} name [[option]]* @result{} package
 

@@ -91,6 +94,19 @@ Example:
 @include fun-sb-ext-add-package-local-nickname.texinfo
 @include fun-sb-ext-remove-package-local-nickname.texinfo
 
 @include fun-sb-ext-add-package-local-nickname.texinfo
 @include fun-sb-ext-remove-package-local-nickname.texinfo
 

+@node  Package Variance
+@comment  node-name,  next,  previous,  up
+@section Package Variance
+
+Common Lisp standard specifies that ``If the new definition is at
+variance with the current state of that package, the consequences are
+undefined;'' SBCL by default signals a full warning and retains as
+much of the package state as possible.
+
+This can be adjusted using @code{sb-ext:*on-package-variance*}:
+
+@include var-sb-ext-star-on-package-variance-star.texinfo
+

 @node  Garbage Collection
 @comment  node-name,  next,  previous,  up
 @section Garbage Collection
 @node  Garbage Collection
 @comment  node-name,  next,  previous,  up
 @section Garbage Collection