make all d-pointer * const pointers

Doing this disables the implicit copy assignment operator (among others)
which would cause hovac if used on the classes as it would just copy the
pointer, not the data the d-pointer points to. For most of the classes
we don't need a copy assignment operator anyway and in many classes it
was broken before as many contain a pointer of some sort.

Only for our Cacheset Container interfaces we define an explicit copy
assignment operator which could later be implemented to copy the data
from one d-pointer to the other if we need it.

Git-Dch: Ignore

1 files changed, 2 insertions, 2 deletions

diff --git a/apt-pkg/depcache.h b/apt-pkg/depcache.h
index 0594a253d..40a2fcaab 100644
--- a/apt-pkg/depcache.h
+++ b/apt-pkg/depcache.h
@@ -163,7 +163,7 @@ class pkgDepCache : protected pkgCache::Namespace
     */
    class ActionGroup
    {
-       void *d;
+       void * const d;
        pkgDepCache &cache;
 
        bool released;
@@ -503,7 +503,7 @@ class pkgDepCache : protected pkgCache::Namespace
 	 bool const rPurge, unsigned long const Depth, bool const FromUser);
 
    private:
-   void *d;
+   void * const d;
 
    APT_HIDDEN bool IsModeChangeOk(ModeList const mode, PkgIterator const &Pkg,
 			unsigned long const Depth, bool const FromUser);