0.8.21.31: tweak finalizers, thighten spec further

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

diff --git a/doc/manual/beyond-ansi.texinfo b/doc/manual/beyond-ansi.texinfo
index fdf8b69..4bb8556 100644 (file)
--- a/doc/manual/beyond-ansi.texinfo
+++ b/doc/manual/beyond-ansi.texinfo
@@ -7,35 +7,38 @@ ANSI standard. SBCL doesn't support as many extensions as CMUCL, but
 it still has quite a few.  @xref{Contributed Modules}.
 
 @menu
-* Things Which Might Be In The Next ANSI Standard::  
+* Garbage Collection::          
+* Metaobject Protocol::         
 * Support For Unix::            
 * Customization Hooks for Users::  
 * Tools To Help Developers::    
+* Resolution of Name Conflicts::  
 * Stale Extensions::            
 * Efficiency Hacks::            
 @end menu
 
-@node  Things Which Might Be In The Next ANSI Standard
+@node  Garbage Collection
 @comment  node-name,  next,  previous,  up
-@section Things Which Might Be In The Next ANSI Standard
-
-SBCL provides extensive support for calling external C code,
-@ref{Foreign Function Interface}.
+@section Garbage Collection
 
 SBCL provides additional garbage collection functionality not
 specified by ANSI. Weak pointers allow references to objects to be
-maintained without keeping them from being GCed (garbage
-collected). And ``finalization'' hooks are available to cause code to
-be executed when an object has been GCed.
-@c <!-- FIXME: Actually documenting these would be good.:-| -->
-
-SBCL supports @dfn{Gray streams}, user-overloadable CLOS classes whose
-instances can be used as Lisp streams (e.g. passed as the first
-argument to @code{format}).  Additionally, the bundled contrib module
-@dfn{sb-simple-streams} implements a subset of the Franz Allegro
-simple-streams proposal.
-
-SBCL supports a MetaObject Protocol which is intended to be compatible
+maintained without keeping them from being garbage collected, and
+``finalization'' hooks are available to cause code to be executed when
+an object has been garbage collected. Additionally users can specify
+their own cleanup actions to be executed with garbage collection.
+
+@include fun-sb-ext-finalize.texinfo
+@include fun-sb-ext-cancel-finalization.texinfo
+@include fun-sb-ext-make-weak-pointer.texinfo
+@include fun-sb-ext-weak-pointer-value.texinfo
+@include var-sb-ext-star-after-gc-hooks-star.texinfo
+
+@node Metaobject Protocol
+@comment  node-name,  next,  previous,  up
+@section Metaobject Protocol
+
+SBCL supports a metaobject protocol which is intended to be compatible
 with AMOP; present exceptions to this (as distinct from current bugs)
 are:
 
@@ -92,7 +95,7 @@ mechanisms as follows:
 @include fun-common-lisp-ed.texinfo
 @include var-sb-ext-star-ed-functions-star.texinfo
 
-@node  Tools To Help Developers
+@node Tools To Help Developers
 @comment  node-name,  next,  previous,  up
 @section Tools To Help Developers
 
@@ -105,6 +108,17 @@ accessed by typing @kbd{help} at the debugger prompt. @xref{Debugger}.
 Documentation for @code{inspect} is accessed by typing @kbd{help} at
 the @code{inspect} prompt.
 
+@node Resolution of Name Conflicts
+@section Resolution of Name Conflicts
+
+The ANSI standard (section 11.1.1.2.5) requires that name conflicts in
+packages be resolvable in favour of any of the conflicting symbols.  In
+the interactive debugger, this is achieved by prompting for the symbol
+in whose favour the conflict should be resolved; for programmatic use,
+the @code{sb-ext:resolve-conflict} restart should be invoked with one
+argument, which should be a member of the list returned by the condition
+accessor @code{sb-ext:name-conflict-symbols}.
+
 @node Stale Extensions
 @comment  node-name,  next,  previous,  up
 @section Stale Extensions