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* goops.texi (Class Redefinition): Clarifications; Removed

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mentioning of change-object-class.
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Mikael Djurfeldt 2003-01-10 12:40:21 +00:00
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5
doc/goops/ChangeLog
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@ -1,3 +1,8 @@
2003-01-10 Mikael Djurfeldt <djurfeldt@nada.kth.se>
* goops.texi (Class Redefinition): Clarifications; Removed
mentioning of change-object-class.
2002-11-07 Neil Jerram <neil@ossau.uklinux.net> 2002-11-07 Neil Jerram <neil@ossau.uklinux.net>
* goops.texi (Top): Say "Indices" before index nodes in main menu. * goops.texi (Top): Say "Indices" before index nodes in main menu.

26
doc/goops/goops.texi
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@ -26,7 +26,7 @@ Guile
@ifinfo @ifinfo
This file documents GOOPS, an object oriented extension for Guile. This file documents GOOPS, an object oriented extension for Guile.
Copyright (C) 1999, 2000, 2001 Free Software Foundation Copyright (C) 1999, 2000, 2001, 2003 Free Software Foundation
Permission is granted to make and distribute verbatim copies of Permission is granted to make and distribute verbatim copies of
this manual provided the copyright notice and this permission notice this manual provided the copyright notice and this permission notice
@ -2651,12 +2651,6 @@ The default @code{class-redefinition} method, specialized for classes
with the default metaclass @code{<class>}, has the following internal with the default metaclass @code{<class>}, has the following internal
protocol. protocol.
[ *fixme* I'm not sure that I understand this sufficiently to explain
it. Also, the internals of the default class redefinition method are
extremely implementation-specific, and I'm not sure that there is that
much point trying to describe the internal protocol such that it could
be customized without going to look at the source code. ]
@code{class-redefinition @var{(old <class>)} @var{(new <class>)}} @code{class-redefinition @var{(old <class>)} @var{(new <class>)}}
(method) (method)
@ -2671,16 +2665,24 @@ be customized without going to look at the source code. ]
@code{update-direct-subclass! @var{subclass} @var{old} @var{new}} (generic) @code{update-direct-subclass! @var{subclass} @var{old} @var{new}} (generic)
@end itemize @end itemize
This protocol cleans up things that the definition of the old class
once changed and modifies things to work with the new class.
The default @code{remove-class-accessors!} method removes the
accessor methods of the old class from all classes which they
specialize.
The default @code{update-direct-method!} method substitutes the new
class for the old in all methods specialized to the old class.
The default @code{update-direct-subclass!} method invokes The default @code{update-direct-subclass!} method invokes
@code{class-redefinition} recursively to handle the redefinition of the @code{class-redefinition} recursively to handle the redefinition of
subclass. subclasses.
When a class is redefined, any existing instance of the redefined class When a class is redefined, any existing instance of the redefined class
will be modified for the new class definition before the next time that will be modified for the new class definition before the next time that
any of the instance's slot is referenced or set. GOOPS modifies each any of the instance's slot is referenced or set. GOOPS modifies each
instance by calling the generic function @code{change-class}. [ *fixme* instance by calling the generic function @code{change-class}.
Actually it sometimes calls @code{change-class} and sometimes
@code{change-object-class}, and I don't understand why. ]
The default @code{change-class} method copies slot values from the old The default @code{change-class} method copies slot values from the old
to the modified instance, and initializes new slots, as described in to the modified instance, and initializes new slots, as described in