Introduce tolower_ascii_unsafe() and use it for hashing

[apt.git] / apt-pkg / cacheset.h

diff --git a/apt-pkg/cacheset.h b/apt-pkg/cacheset.h
index dde4e221e219e09e9a208ffce1e455fbca17d0c0..7edeac4af537b2864069d542f1d7b5d69bd996b2 100644 (file)
--- a/apt-pkg/cacheset.h
+++ b/apt-pkg/cacheset.h
@@ -12,15 +12,24 @@
 #include <fstream>
 #include <map>
 #include <set>
 #include <fstream>
 #include <map>
 #include <set>

+#if __cplusplus >= 201103L
+#include <unordered_set>
+#include <forward_list>
+#include <initializer_list>
+#endif

 #include <list>
 #include <list>

+#include <deque>
+#include <vector>

 #include <string>
 #include <iterator>
 #include <string>
 #include <iterator>

+#include <algorithm>

 
 #include <stddef.h>
 
 #include <apt-pkg/error.h>
 #include <apt-pkg/pkgcache.h>
 #include <apt-pkg/cacheiterators.h>
 
 #include <stddef.h>
 
 #include <apt-pkg/error.h>
 #include <apt-pkg/pkgcache.h>
 #include <apt-pkg/cacheiterators.h>

+#include <apt-pkg/macros.h>

 
 #ifndef APT_8_CLEANER_HEADERS
 #include <apt-pkg/cachefile.h>
 
 #ifndef APT_8_CLEANER_HEADERS
 #include <apt-pkg/cachefile.h>


@@ -47,40 +56,126 @@ class CacheSetHelper {                                                     /*{{{*/
 */
 public:                                                                        /*{{{*/
        CacheSetHelper(bool const ShowError = true,
 */
 public:                                                                        /*{{{*/
        CacheSetHelper(bool const ShowError = true,

-               GlobalError::MsgType ErrorType = GlobalError::ERROR) :
-                       ShowError(ShowError), ErrorType(ErrorType) {}
-       virtual ~CacheSetHelper() {}
-
-       virtual void showTaskSelection(pkgCache::PkgIterator const &pkg, std::string const &pattern);
-       virtual void showRegExSelection(pkgCache::PkgIterator const &pkg, std::string const &pattern);
-#if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)
-       virtual void showFnmatchSelection(pkgCache::PkgIterator const &pkg, std::string const &pattern);
-#endif
-       virtual void showSelectedVersion(pkgCache::PkgIterator const &Pkg, pkgCache::VerIterator const Ver,
-                                std::string const &ver, bool const verIsRel);
+               GlobalError::MsgType ErrorType = GlobalError::ERROR);
+       virtual ~CacheSetHelper();

 
 

-       virtual void canNotFindTask(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern);
-       virtual void canNotFindRegEx(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern);
-#if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR >= 13)
-       virtual void canNotFindFnmatch(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern);
-#endif
-       virtual void canNotFindPackage(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string const &str);
+       enum PkgSelector { UNKNOWN, REGEX, TASK, FNMATCH, PACKAGENAME, STRING };
+
+       virtual bool PackageFrom(enum PkgSelector const select, PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string const &pattern);

 
 

-       virtual void canNotFindAllVer(VersionContainerInterface * const vci, pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg);
-       virtual void canNotFindInstCandVer(VersionContainerInterface * const vci, pkgCacheFile &Cache,
+       virtual bool PackageFromCommandLine(PackageContainerInterface * const pci, pkgCacheFile &Cache, const char **cmdline);
+
+       struct PkgModifier {
+               enum Position { NONE, PREFIX, POSTFIX };
+               unsigned short ID;
+               const char * const Alias;
+               Position Pos;
+               PkgModifier (unsigned short const &id, const char * const alias, Position const &pos) : ID(id), Alias(alias), Pos(pos) {}
+       };
+       virtual bool PackageFromModifierCommandLine(unsigned short &modID, PackageContainerInterface * const pci,
+                                           pkgCacheFile &Cache, const char * cmdline,
+                                           std::list<PkgModifier> const &mods);
+
+       APT_DEPRECATED_MSG("use .PackageFrom(PACKAGENAME, …) instead") pkgCache::PkgIterator PackageFromName(pkgCacheFile &Cache, std::string const &pattern);
+
+       /** \brief be notified about the package being selected via pattern
+        *
+        * Main use is probably to show a message to the user what happened
+        *
+        * \param pkg is the package which was selected
+        * \param select is the selection method which choose the package
+        * \param pattern is the string used by the selection method to pick the package
+        */
+       virtual void showPackageSelection(pkgCache::PkgIterator const &pkg, PkgSelector const select, std::string const &pattern);
+       // use the method above instead, react only on the type you need and let the base handle the rest if need be
+       // this allows us to add new selection methods without breaking the ABI constantly with new virtual methods
+       APT_DEPRECATED_MSG("override .showPackageSelection and select with switch") virtual void showTaskSelection(pkgCache::PkgIterator const &pkg, std::string const &pattern);
+       APT_DEPRECATED_MSG("override .showPackageSelection and select with switch") virtual void showRegExSelection(pkgCache::PkgIterator const &pkg, std::string const &pattern);
+       APT_DEPRECATED_MSG("override .showPackageSelection and select with switch") virtual void showFnmatchSelection(pkgCache::PkgIterator const &pkg, std::string const &pattern);
+
+       /** \brief be notified if a package can't be found via pattern
+        *
+        * Can be used to show a message as well as to try something else to make it match
+        *
+        * \param select is the method tried for selection
+        * \param pci is the container the package should be inserted in
+        * \param Cache is the package universe available
+        * \param pattern is the string not matching anything
+        */
+       virtual void canNotFindPackage(enum PkgSelector const select, PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string const &pattern);
+       // same as above for showPackageSelection
+       APT_DEPRECATED_MSG("override .canNotFindPackage and select with switch") virtual void canNotFindTask(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern);
+       APT_DEPRECATED_MSG("override .canNotFindPackage and select with switch") virtual void canNotFindRegEx(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern);
+       APT_DEPRECATED_MSG("override .canNotFindPackage and select with switch") virtual void canNotFindFnmatch(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern);
+       APT_DEPRECATED_MSG("override .canNotFindPackage and select with switch") virtual void canNotFindPackage(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string const &str);
+
+       /** \brief specifies which version(s) we want to refer to */
+       enum VerSelector {
+               /** by release string */
+               RELEASE,
+               /** by version number string */
+               VERSIONNUMBER,
+               /** All versions */
+               ALL,
+               /** Candidate and installed version */
+               CANDANDINST,
+               /** Candidate version */
+               CANDIDATE,
+               /** Installed version */
+               INSTALLED,
+               /** Candidate or if non installed version */
+               CANDINST,
+               /** Installed or if non candidate version */
+               INSTCAND,
+               /** Newest version */
+               NEWEST
+       };
+
+       /** \brief be notified about the version being selected via pattern
+        *
+        * Main use is probably to show a message to the user what happened
+        * Note that at the moment this method is only called for RELEASE
+        * and VERSION selections, not for the others.
+        *
+        * \param Pkg is the package which was selected for
+        * \param Ver is the version selected
+        * \param select is the selection method which choose the version
+        * \param pattern is the string used by the selection method to pick the version
+        */
+       virtual void showVersionSelection(pkgCache::PkgIterator const &Pkg, pkgCache::VerIterator const &Ver,
+             enum VerSelector const select, std::string const &pattern);
+       APT_DEPRECATED_MSG("use .showVersionSelection instead, similar to .showPackageSelection") virtual void showSelectedVersion(pkgCache::PkgIterator const &Pkg, pkgCache::VerIterator const Ver,
+                                std::string const &ver, bool const verIsRel);
+
+       /** \brief be notified if a version can't be found for a package
+        *
+        * Main use is probably to show a message to the user what happened
+        *
+        * \param select is the method tried for selection
+        * \param vci is the container the version should be inserted in
+        * \param Cache is the package universe available
+        * \param Pkg is the package we wanted a version from
+        */
+       virtual void canNotFindVersion(enum VerSelector const select, VersionContainerInterface * const vci, pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg);
+       APT_DEPRECATED_MSG("override .canNotFindVersion and select via switch") virtual void canNotFindAllVer(VersionContainerInterface * const vci, pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg);
+       APT_DEPRECATED_MSG("override .canNotFindVersion and select via switch") virtual void canNotFindInstCandVer(VersionContainerInterface * const vci, pkgCacheFile &Cache,

                                pkgCache::PkgIterator const &Pkg);
                                pkgCache::PkgIterator const &Pkg);

-       virtual void canNotFindCandInstVer(VersionContainerInterface * const vci,
+       APT_DEPRECATED_MSG("override .canNotFindVersion and select via switch") virtual void canNotFindCandInstVer(VersionContainerInterface * const vci,

                                pkgCacheFile &Cache,
                                pkgCache::PkgIterator const &Pkg);
 
                                pkgCacheFile &Cache,
                                pkgCache::PkgIterator const &Pkg);
 

-       virtual pkgCache::PkgIterator canNotFindPkgName(pkgCacheFile &Cache, std::string const &str);
-       virtual pkgCache::VerIterator canNotFindNewestVer(pkgCacheFile &Cache,
+       // the difference between canNotFind and canNotGet is that the later is more low-level
+       // and called from other places: In this case looking into the code is the only real answer…
+       virtual pkgCache::VerIterator canNotGetVersion(enum VerSelector const select, pkgCacheFile &Cache, pkgCache::PkgIterator const &Pkg);
+       APT_DEPRECATED_MSG("override .canNotGetVersion and select via switch") virtual pkgCache::VerIterator canNotFindNewestVer(pkgCacheFile &Cache,

                                pkgCache::PkgIterator const &Pkg);
                                pkgCache::PkgIterator const &Pkg);

-       virtual pkgCache::VerIterator canNotFindCandidateVer(pkgCacheFile &Cache,
+       APT_DEPRECATED_MSG("override .canNotGetVersion and select via switch") virtual pkgCache::VerIterator canNotFindCandidateVer(pkgCacheFile &Cache,

                                pkgCache::PkgIterator const &Pkg);
                                pkgCache::PkgIterator const &Pkg);

-       virtual pkgCache::VerIterator canNotFindInstalledVer(pkgCacheFile &Cache,
+       APT_DEPRECATED_MSG("override .canNotGetVersion and select via switch") virtual pkgCache::VerIterator canNotFindInstalledVer(pkgCacheFile &Cache,

                                pkgCache::PkgIterator const &Pkg);
 
                                pkgCache::PkgIterator const &Pkg);
 

+       virtual pkgCache::PkgIterator canNotFindPkgName(pkgCacheFile &Cache, std::string const &str);
+

        bool showErrors() const { return ShowError; }
        bool showErrors(bool const newValue) { if (ShowError == newValue) return ShowError; else return ((ShowError = newValue) == false); }
        GlobalError::MsgType errorType() const { return ErrorType; }
        bool showErrors() const { return ShowError; }
        bool showErrors(bool const newValue) { if (ShowError == newValue) return ShowError; else return ((ShowError = newValue) == false); }
        GlobalError::MsgType errorType() const { return ErrorType; }


@@ -98,7 +193,106 @@ public:                                                                    /*{{{*/
 protected:
        bool ShowError;
        GlobalError::MsgType ErrorType;
 protected:
        bool ShowError;
        GlobalError::MsgType ErrorType;

+
+       pkgCache::VerIterator canNotGetInstCandVer(pkgCacheFile &Cache,
+               pkgCache::PkgIterator const &Pkg);
+       pkgCache::VerIterator canNotGetCandInstVer(pkgCacheFile &Cache,
+               pkgCache::PkgIterator const &Pkg);
+
+       bool PackageFromTask(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern);
+       bool PackageFromRegEx(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern);
+       bool PackageFromFnmatch(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern);
+       bool PackageFromPackageName(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern);
+       bool PackageFromString(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string const &pattern);
+private:
+       void * const d;

 };                                                                     /*}}}*/
 };                                                                     /*}}}*/

+// Iterator templates for our Containers                               /*{{{*/
+template<typename Interface, typename Master, typename iterator_type, typename container_iterator, typename container_value> class Container_iterator_base :
+   public std::iterator<typename std::iterator_traits<container_iterator>::iterator_category, container_value>,
+   public Interface::template iterator_base<iterator_type>
+{
+protected:
+       container_iterator _iter;
+public:
+       explicit Container_iterator_base(container_iterator i) : _iter(i) {}
+       inline container_value operator*(void) const { return static_cast<iterator_type const*>(this)->getType(); };
+       operator container_iterator(void) const { return _iter; }
+       inline iterator_type& operator++() { ++_iter; return static_cast<iterator_type&>(*this); }
+       inline iterator_type operator++(int) { iterator_type tmp(*this); operator++(); return tmp; }
+       inline iterator_type operator+(typename container_iterator::difference_type const &n) { return iterator_type(_iter + n); }
+       inline iterator_type operator+=(typename container_iterator::difference_type const &n) { _iter += n; return static_cast<iterator_type&>(*this); }
+       inline iterator_type& operator--() { --_iter;; return static_cast<iterator_type&>(*this); }
+       inline iterator_type operator--(int) { iterator_type tmp(*this); operator--(); return tmp; }
+       inline iterator_type operator-(typename container_iterator::difference_type const &n) { return iterator_type(_iter - n); }
+       inline typename container_iterator::difference_type operator-(iterator_type const &b) { return (_iter - b._iter); }
+       inline iterator_type operator-=(typename container_iterator::difference_type const &n) { _iter -= n; return static_cast<iterator_type&>(*this); }
+       inline bool operator!=(iterator_type const &i) const { return _iter != i._iter; }
+       inline bool operator==(iterator_type const &i) const { return _iter == i._iter; }
+       inline bool operator<(iterator_type const &i) const { return _iter < i._iter; }
+       inline bool operator>(iterator_type const &i) const { return _iter > i._iter; }
+       inline bool operator<=(iterator_type const &i) const { return _iter <= i._iter; }
+       inline bool operator>=(iterator_type const &i) const { return _iter >= i._iter; }
+       inline typename container_iterator::reference operator[](typename container_iterator::difference_type const &n) const { return _iter[n]; }
+
+       friend std::ostream& operator<<(std::ostream& out, iterator_type i) { return operator<<(out, *i); }
+       friend Master;
+};
+template<class Interface, class Container, class Master> class Container_const_iterator :
+   public Container_iterator_base<Interface, Master, Container_const_iterator<Interface, Container, Master>, typename Container::const_iterator, typename Container::value_type>
+{
+       typedef Container_const_iterator<Interface, Container, Master> iterator_type;
+       typedef typename Container::const_iterator container_iterator;
+public:
+       explicit Container_const_iterator(container_iterator i) :
+          Container_iterator_base<Interface, Master, iterator_type, container_iterator, typename Container::value_type>(i) {}
+
+       inline typename Container::value_type getType(void) const { return *this->_iter; }
+};
+template<class Interface, class Container, class Master> class Container_iterator :
+   public Container_iterator_base<Interface, Master, Container_iterator<Interface, Container, Master>, typename Container::iterator, typename Container::value_type>
+{
+       typedef Container_iterator<Interface, Container, Master> iterator_type;
+       typedef typename Container::iterator container_iterator;
+public:
+       explicit Container_iterator(container_iterator i) :
+          Container_iterator_base<Interface, Master, iterator_type, container_iterator, typename Container::value_type>(i) {}
+
+       operator typename Master::const_iterator() { return typename Master::const_iterator(this->_iter); }
+       inline iterator_type& operator=(iterator_type const &i) { this->_iter = i._iter; return static_cast<iterator_type&>(*this); }
+       inline iterator_type& operator=(container_iterator const &i) { this->_iter = i; return static_cast<iterator_type&>(*this); }
+       inline typename Container::iterator::reference operator*(void) const { return *this->_iter; }
+
+       inline typename Container::value_type getType(void) const { return *this->_iter; }
+};
+template<class Interface, class Container, class Master> class Container_const_reverse_iterator :
+   public Container_iterator_base<Interface, Master, Container_const_reverse_iterator<Interface, Container, Master>, typename Container::const_reverse_iterator, typename Container::value_type>
+{
+       typedef Container_const_reverse_iterator<Interface, Container, Master> iterator_type;
+       typedef typename Container::const_reverse_iterator container_iterator;
+public:
+       explicit Container_const_reverse_iterator(container_iterator i) :
+          Container_iterator_base<Interface, Master, iterator_type, container_iterator, typename Container::value_type>(i) {}
+
+       inline typename Container::value_type getType(void) const { return *this->_iter; }
+};
+template<class Interface, class Container, class Master> class Container_reverse_iterator :
+   public Container_iterator_base<Interface, Master, Container_reverse_iterator<Interface, Container, Master>, typename Container::reverse_iterator, typename Container::value_type>
+{
+       typedef Container_reverse_iterator<Interface, Container, Master> iterator_type;
+       typedef typename Container::reverse_iterator container_iterator;
+public:
+       explicit Container_reverse_iterator(container_iterator i) :
+          Container_iterator_base<Interface, Master, iterator_type, container_iterator, typename Container::value_type>(i) {}
+
+       operator typename Master::const_iterator() { return typename Master::const_iterator(this->_iter); }
+       inline iterator_type& operator=(iterator_type const &i) { this->_iter = i._iter; return static_cast<iterator_type&>(*this); }
+       inline iterator_type& operator=(container_iterator const &i) { this->_iter = i; return static_cast<iterator_type&>(*this); }
+       inline typename Container::reverse_iterator::reference operator*(void) const { return *this->_iter; }
+
+       inline typename Container::value_type getType(void) const { return *this->_iter; }
+};
+                                                                       /*}}}*/

 class PackageContainerInterface {                                      /*{{{*/
 /** \class PackageContainerInterface
 
 class PackageContainerInterface {                                      /*{{{*/
 /** \class PackageContainerInterface
 


@@ -110,61 +304,85 @@ class PackageContainerInterface {                                 /*{{{*/
  * This class mostly protects use from the need to write all implementation
  * of the methods working on containers in the template */
 public:
  * This class mostly protects use from the need to write all implementation
  * of the methods working on containers in the template */
 public:

-       class const_iterator {                                          /*{{{*/
+       template<class Itr> class iterator_base {                       /*{{{*/
+               pkgCache::PkgIterator getType() const { return static_cast<Itr const*>(this)->getType(); };

        public:
        public:

-               virtual pkgCache::PkgIterator getPkg() const = 0;
-               operator pkgCache::PkgIterator(void) const { return getPkg(); }
-
-               inline const char *Name() const {return getPkg().Name(); }
-               inline std::string FullName(bool const Pretty) const { return getPkg().FullName(Pretty); }
-               inline std::string FullName() const { return getPkg().FullName(); }
-               inline const char *Section() const {return getPkg().Section(); }
-               inline bool Purge() const {return getPkg().Purge(); }
-               inline const char *Arch() const {return getPkg().Arch(); }
-               inline pkgCache::GrpIterator Group() const { return getPkg().Group(); }
-               inline pkgCache::VerIterator VersionList() const { return getPkg().VersionList(); }
-               inline pkgCache::VerIterator CurrentVer() const { return getPkg().CurrentVer(); }
-               inline pkgCache::DepIterator RevDependsList() const { return getPkg().RevDependsList(); }
-               inline pkgCache::PrvIterator ProvidesList() const { return getPkg().ProvidesList(); }
-               inline pkgCache::PkgIterator::OkState State() const { return getPkg().State(); }
-               inline const char *CandVersion() const { return getPkg().CandVersion(); }
-               inline const char *CurVersion() const { return getPkg().CurVersion(); }
-               inline pkgCache *Cache() const { return getPkg().Cache(); }
-               inline unsigned long Index() const {return getPkg().Index();}
+               operator pkgCache::PkgIterator(void) const { return getType(); }
+
+               inline const char *Name() const {return getType().Name(); }
+               inline std::string FullName(bool const Pretty) const { return getType().FullName(Pretty); }
+               inline std::string FullName() const { return getType().FullName(); }
+               APT_DEPRECATED_MSG("Use the .Section method of VerIterator instead") inline const char *Section() const {
+                  APT_IGNORE_DEPRECATED_PUSH
+                     return getType().Section();
+                  APT_IGNORE_DEPRECATED_POP
+               }
+               inline bool Purge() const {return getType().Purge(); }
+               inline const char *Arch() const {return getType().Arch(); }
+               inline pkgCache::GrpIterator Group() const { return getType().Group(); }
+               inline pkgCache::VerIterator VersionList() const { return getType().VersionList(); }
+               inline pkgCache::VerIterator CurrentVer() const { return getType().CurrentVer(); }
+               inline pkgCache::DepIterator RevDependsList() const { return getType().RevDependsList(); }
+               inline pkgCache::PrvIterator ProvidesList() const { return getType().ProvidesList(); }
+               inline pkgCache::PkgIterator::OkState State() const { return getType().State(); }
+               APT_DEPRECATED_MSG("This method does not respect apt_preferences! Use pkgDepCache::GetCandidateVersion(Pkg)") inline const char *CandVersion() const { return getType().CandVersion(); }
+               inline const char *CurVersion() const { return getType().CurVersion(); }
+               inline pkgCache *Cache() const { return getType().Cache(); }
+               inline unsigned long Index() const {return getType().Index();}

                // we have only valid iterators here
                inline bool end() const { return false; }
 
                // we have only valid iterators here
                inline bool end() const { return false; }
 

-               inline pkgCache::Package const * operator->() const {return &*getPkg();}
+               inline pkgCache::Package const * operator->() const {return &*getType();}

        };
                                                                        /*}}}*/
 
        virtual bool insert(pkgCache::PkgIterator const &P) = 0;
        virtual bool empty() const = 0;
        virtual void clear() = 0;
        };
                                                                        /*}}}*/
 
        virtual bool insert(pkgCache::PkgIterator const &P) = 0;
        virtual bool empty() const = 0;
        virtual void clear() = 0;

-
-       enum Constructor { UNKNOWN, REGEX, TASK, FNMATCH };
-       virtual void setConstructor(Constructor const &con) = 0;
-       virtual Constructor getConstructor() const = 0;
-
-       static bool FromTask(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern, CacheSetHelper &helper);
-       static bool FromRegEx(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern, CacheSetHelper &helper);
-       static pkgCache::PkgIterator FromName(pkgCacheFile &Cache, std::string const &pattern, CacheSetHelper &helper);
-       static bool FromFnmatch(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern, CacheSetHelper &helper);
-       static bool FromGroup(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern, CacheSetHelper &helper);
-       static bool FromString(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string const &pattern, CacheSetHelper &helper);
-       static bool FromCommandLine(PackageContainerInterface * const pci, pkgCacheFile &Cache, const char **cmdline, CacheSetHelper &helper);
-
-       struct Modifier {
-               enum Position { NONE, PREFIX, POSTFIX };
-               unsigned short ID;
-               const char * const Alias;
-               Position Pos;
-               Modifier (unsigned short const &id, const char * const alias, Position const &pos) : ID(id), Alias(alias), Pos(pos) {}
-       };
-
-       static bool FromModifierCommandLine(unsigned short &modID, PackageContainerInterface * const pci,
-                                           pkgCacheFile &Cache, const char * cmdline,
-                                           std::list<Modifier> const &mods, CacheSetHelper &helper);
+       virtual size_t size() const = 0;
+
+       enum APT_DEPRECATED_MSG("Use CacheSetHelper::PkgSelector instead") Constructor { UNKNOWN = CacheSetHelper::UNKNOWN,
+               REGEX = CacheSetHelper::REGEX,
+               TASK = CacheSetHelper::TASK,
+               FNMATCH = CacheSetHelper::FNMATCH };
+APT_IGNORE_DEPRECATED_PUSH
+       void setConstructor(Constructor const by) { ConstructedBy = (CacheSetHelper::PkgSelector)by; }
+APT_IGNORE_DEPRECATED_POP
+
+       void setConstructor(CacheSetHelper::PkgSelector const by) { ConstructedBy = by; }
+       CacheSetHelper::PkgSelector getConstructor() const { return ConstructedBy; }
+       PackageContainerInterface();
+       explicit PackageContainerInterface(CacheSetHelper::PkgSelector const by);
+       PackageContainerInterface& operator=(PackageContainerInterface const &other);
+       virtual ~PackageContainerInterface();
+
+       APT_DEPRECATED_MSG("Use helper.PackageFrom(CacheSetHelper::TASK, …) instead") static bool FromTask(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern, CacheSetHelper &helper) {
+          return helper.PackageFrom(CacheSetHelper::TASK, pci, Cache, pattern); }
+       APT_DEPRECATED_MSG("Use helper.PackageFrom(CacheSetHelper::REGEX, …) instead") static bool FromRegEx(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern, CacheSetHelper &helper) {
+          return helper.PackageFrom(CacheSetHelper::REGEX, pci, Cache, pattern); }
+       APT_DEPRECATED_MSG("Use helper.PackageFrom(CacheSetHelper::FNMATCH, …) instead") static bool FromFnmatch(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern, CacheSetHelper &helper) {
+          return helper.PackageFrom(CacheSetHelper::FNMATCH, pci, Cache, pattern); }
+       APT_DEPRECATED_MSG("Use helper.PackageFrom(CacheSetHelper::PACKAGENAME, …) instead") static bool FromGroup(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string pattern, CacheSetHelper &helper) {
+          return helper.PackageFrom(CacheSetHelper::PACKAGENAME, pci, Cache, pattern); }
+       APT_DEPRECATED_MSG("Use helper.PackageFrom(CacheSetHelper::STRING, …) instead") static bool FromString(PackageContainerInterface * const pci, pkgCacheFile &Cache, std::string const &pattern, CacheSetHelper &helper) {
+          return helper.PackageFrom(CacheSetHelper::STRING, pci, Cache, pattern); }
+       APT_DEPRECATED_MSG("Use helper.PackageFromCommandLine instead") static bool FromCommandLine(PackageContainerInterface * const pci, pkgCacheFile &Cache, const char **cmdline, CacheSetHelper &helper) {
+          return helper.PackageFromCommandLine(pci, Cache, cmdline); }
+
+       APT_DEPRECATED_MSG("enum moved to CacheSetHelper::PkgModifier") typedef CacheSetHelper::PkgModifier Modifier;
+
+APT_IGNORE_DEPRECATED_PUSH
+       APT_DEPRECATED_MSG("Use helper.PackageFromName instead") static pkgCache::PkgIterator FromName(pkgCacheFile &Cache, std::string const &pattern, CacheSetHelper &helper) {
+          return helper.PackageFromName(Cache, pattern); }
+       APT_DEPRECATED_MSG("Use helper.PackageFromModifierCommandLine instead") static bool FromModifierCommandLine(unsigned short &modID, PackageContainerInterface * const pci,
+             pkgCacheFile &Cache, const char * cmdline,
+             std::list<Modifier> const &mods, CacheSetHelper &helper) {
+          return helper.PackageFromModifierCommandLine(modID, pci, Cache, cmdline, mods); }
+APT_IGNORE_DEPRECATED_POP
+
+private:
+       CacheSetHelper::PkgSelector ConstructedBy;
+       void * const d;

 };
                                                                        /*}}}*/
 template<class Container> class PackageContainer : public PackageContainerInterface {/*{{{*/
 };
                                                                        /*}}}*/
 template<class Container> class PackageContainer : public PackageContainerInterface {/*{{{*/


@@ -176,63 +394,73 @@ template<class Container> class PackageContainer : public PackageContainerInterf
        Container _cont;
 public:                                                                        /*{{{*/
        /** \brief smell like a pkgCache::PkgIterator */
        Container _cont;
 public:                                                                        /*{{{*/
        /** \brief smell like a pkgCache::PkgIterator */

-       class const_iterator : public PackageContainerInterface::const_iterator,/*{{{*/
-                              public std::iterator<std::forward_iterator_tag, typename Container::const_iterator> {
-               typename Container::const_iterator _iter;
-       public:
-               const_iterator(typename Container::const_iterator i) : _iter(i) {}
-               pkgCache::PkgIterator getPkg(void) const { return *_iter; }
-               inline pkgCache::PkgIterator operator*(void) const { return *_iter; }
-               operator typename Container::const_iterator(void) const { return _iter; }
-               inline const_iterator& operator++() { ++_iter; return *this; }
-               inline const_iterator operator++(int) { const_iterator tmp(*this); operator++(); return tmp; }
-               inline bool operator!=(const_iterator const &i) const { return _iter != i._iter; }
-               inline bool operator==(const_iterator const &i) const { return _iter == i._iter; }
-               friend std::ostream& operator<<(std::ostream& out, const_iterator i) { return operator<<(out, *i); }
-       };
-       class iterator : public PackageContainerInterface::const_iterator,
-                        public std::iterator<std::forward_iterator_tag, typename Container::iterator> {
-               typename Container::iterator _iter;
-       public:
-               iterator(typename Container::iterator i) : _iter(i) {}
-               pkgCache::PkgIterator getPkg(void) const { return *_iter; }
-               inline pkgCache::PkgIterator operator*(void) const { return *_iter; }
-               operator typename Container::iterator(void) const { return _iter; }
-               operator typename PackageContainer<Container>::const_iterator() { return typename PackageContainer<Container>::const_iterator(_iter); }
-               inline iterator& operator++() { ++_iter; return *this; }
-               inline iterator operator++(int) { iterator tmp(*this); operator++(); return tmp; }
-               inline bool operator!=(iterator const &i) const { return _iter != i._iter; }
-               inline bool operator==(iterator const &i) const { return _iter == i._iter; }
-               inline iterator& operator=(iterator const &i) { _iter = i._iter; return *this; }
-               inline iterator& operator=(typename Container::iterator const &i) { _iter = i; return *this; }
-               friend std::ostream& operator<<(std::ostream& out, iterator i) { return operator<<(out, *i); }
-       };
-                                                                       /*}}}*/
-
-       bool insert(pkgCache::PkgIterator const &P) { if (P.end() == true) return false; _cont.insert(P); return true; }
+       typedef Container_const_iterator<PackageContainerInterface, Container, PackageContainer> const_iterator;
+       typedef Container_iterator<PackageContainerInterface, Container, PackageContainer> iterator;
+       typedef Container_const_reverse_iterator<PackageContainerInterface, Container, PackageContainer> const_reverse_iterator;
+       typedef Container_reverse_iterator<PackageContainerInterface, Container, PackageContainer> reverse_iterator;
+       typedef typename Container::value_type value_type;
+       typedef typename Container::pointer pointer;
+       typedef typename Container::const_pointer const_pointer;
+       typedef typename Container::reference reference;
+       typedef typename Container::const_reference const_reference;
+       typedef typename Container::difference_type difference_type;
+       typedef typename Container::size_type size_type;
+       typedef typename Container::allocator_type allocator_type;
+
+       bool insert(pkgCache::PkgIterator const &P) APT_OVERRIDE { if (P.end() == true) return false; _cont.insert(P); return true; }

        template<class Cont> void insert(PackageContainer<Cont> const &pkgcont) { _cont.insert((typename Cont::const_iterator)pkgcont.begin(), (typename Cont::const_iterator)pkgcont.end()); }
        void insert(const_iterator begin, const_iterator end) { _cont.insert(begin, end); }
 
        template<class Cont> void insert(PackageContainer<Cont> const &pkgcont) { _cont.insert((typename Cont::const_iterator)pkgcont.begin(), (typename Cont::const_iterator)pkgcont.end()); }
        void insert(const_iterator begin, const_iterator end) { _cont.insert(begin, end); }
 

-       bool empty() const { return _cont.empty(); }
-       void clear() { return _cont.clear(); }
-       //FIXME: on ABI break, replace the first with the second without bool
-       void erase(iterator position) { _cont.erase((typename Container::iterator)position); }
-       iterator& erase(iterator &position, bool) { return position = _cont.erase((typename Container::iterator)position); }
-       size_t erase(const pkgCache::PkgIterator x) { return _cont.erase(x); }
-       void erase(iterator first, iterator last) { _cont.erase(first, last); }
-       size_t size() const { return _cont.size(); }
-
+       bool empty() const APT_OVERRIDE { return _cont.empty(); }
+       void clear() APT_OVERRIDE { return _cont.clear(); }
+       size_t size() const APT_OVERRIDE { return _cont.size(); }
+#if __GNUC__ >= 5 || (__GNUC_MINOR__ >= 9 && __GNUC__ >= 4)
+       iterator erase( const_iterator pos ) { return iterator(_cont.erase(pos._iter)); }
+       iterator erase( const_iterator first, const_iterator last ) { return iterator(_cont.erase(first._iter, last._iter)); }
+#else
+       iterator erase( iterator pos ) { return iterator(_cont.erase(pos._iter)); }
+       iterator erase( iterator first, iterator last ) { return iterator(_cont.erase(first._iter, last._iter)); }
+#endif

        const_iterator begin() const { return const_iterator(_cont.begin()); }
        const_iterator end() const { return const_iterator(_cont.end()); }
        const_iterator begin() const { return const_iterator(_cont.begin()); }
        const_iterator end() const { return const_iterator(_cont.end()); }

+       const_reverse_iterator rbegin() const { return const_reverse_iterator(_cont.rbegin()); }
+       const_reverse_iterator rend() const { return const_reverse_iterator(_cont.rend()); }
+#if __cplusplus >= 201103L
+       const_iterator cbegin() const { return const_iterator(_cont.cbegin()); }
+       const_iterator cend() const { return const_iterator(_cont.cend()); }
+       const_reverse_iterator crbegin() const { return const_reverse_iterator(_cont.crbegin()); }
+       const_reverse_iterator crend() const { return const_reverse_iterator(_cont.crend()); }
+#endif

        iterator begin() { return iterator(_cont.begin()); }
        iterator end() { return iterator(_cont.end()); }
        iterator begin() { return iterator(_cont.begin()); }
        iterator end() { return iterator(_cont.end()); }

+       reverse_iterator rbegin() { return reverse_iterator(_cont.rbegin()); }
+       reverse_iterator rend() { return reverse_iterator(_cont.rend()); }

        const_iterator find(pkgCache::PkgIterator const &P) const { return const_iterator(_cont.find(P)); }
 
        const_iterator find(pkgCache::PkgIterator const &P) const { return const_iterator(_cont.find(P)); }
 

-       void setConstructor(Constructor const &by) { ConstructedBy = by; }
-       Constructor getConstructor() const { return ConstructedBy; }
+       PackageContainer() : PackageContainerInterface(CacheSetHelper::UNKNOWN) {}
+       explicit PackageContainer(CacheSetHelper::PkgSelector const &by) : PackageContainerInterface(by) {}
+APT_IGNORE_DEPRECATED_PUSH
+       APT_DEPRECATED_MSG("Construct with a CacheSetHelper::PkgSelector instead") explicit PackageContainer(Constructor const &by) : PackageContainerInterface((CacheSetHelper::PkgSelector)by) {}
+APT_IGNORE_DEPRECATED_POP
+       template<typename Itr> PackageContainer(Itr first, Itr last) : PackageContainerInterface(CacheSetHelper::UNKNOWN), _cont(first, last) {}
+#if __cplusplus >= 201103L
+       PackageContainer(std::initializer_list<value_type> list) : PackageContainerInterface(CacheSetHelper::UNKNOWN), _cont(list) {}
+       void push_back(value_type&& P) { _cont.emplace_back(std::move(P)); }
+       template<typename... Args> void emplace_back(Args&&... args) { _cont.emplace_back(std::forward<Args>(args)...); }
+#endif
+       void push_back(const value_type& P) { _cont.push_back(P); }
+
+       /** \brief sort all included versions with given comparer

 
 

-       PackageContainer() : ConstructedBy(UNKNOWN) {}
-       PackageContainer(Constructor const &by) : ConstructedBy(by) {}
+           Some containers are sorted by default, some are not and can't be,
+           but a few like std::vector can be sorted if need be, so this can be
+           specialized in later on. The default is that this will fail though.
+           Specifically, already sorted containers like std::set will return
+           false as well as there is no easy way to check that the given comparer
+           would sort in the same way the set is currently sorted
+
+           \return \b true if the set was sorted, \b false if not. */
+       template<class Compare> bool sort(Compare /*Comp*/) { return false; }

 
        /** \brief returns all packages in the cache who belong to the given task
 
 
        /** \brief returns all packages in the cache who belong to the given task
 


@@ -243,8 +471,8 @@ public:                                                                     /*{{{*/
            \param pattern name of the task
            \param helper responsible for error and message handling */
        static PackageContainer FromTask(pkgCacheFile &Cache, std::string const &pattern, CacheSetHelper &helper) {
            \param pattern name of the task
            \param helper responsible for error and message handling */
        static PackageContainer FromTask(pkgCacheFile &Cache, std::string const &pattern, CacheSetHelper &helper) {

-               PackageContainer cont(TASK);
-               PackageContainerInterface::FromTask(&cont, Cache, pattern, helper);
+               PackageContainer cont(CacheSetHelper::TASK);
+               helper.PackageFrom(CacheSetHelper::TASK, &cont, Cache, pattern);

                return cont;
        }
        static PackageContainer FromTask(pkgCacheFile &Cache, std::string const &pattern) {
                return cont;
        }
        static PackageContainer FromTask(pkgCacheFile &Cache, std::string const &pattern) {


@@ -260,9 +488,9 @@ public:                                                                     /*{{{*/
            \param Cache the packages are in
            \param pattern regular expression for package names
            \param helper responsible for error and message handling */
            \param Cache the packages are in
            \param pattern regular expression for package names
            \param helper responsible for error and message handling */

-       static PackageContainer FromRegEx(pkgCacheFile &Cache, std::string pattern, CacheSetHelper &helper) {
-               PackageContainer cont(REGEX);
-               PackageContainerInterface::FromRegEx(&cont, Cache, pattern, helper);
+       static PackageContainer FromRegEx(pkgCacheFile &Cache, std::string const &pattern, CacheSetHelper &helper) {
+               PackageContainer cont(CacheSetHelper::REGEX);
+               helper.PackageFrom(CacheSetHelper::REGEX, &cont, Cache, pattern);

                return cont;
        }
 
                return cont;
        }
 


@@ -271,9 +499,9 @@ public:                                                                     /*{{{*/
                return FromRegEx(Cache, pattern, helper);
        }
 
                return FromRegEx(Cache, pattern, helper);
        }
 

-       static PackageContainer FromFnmatch(pkgCacheFile &Cache, std::string pattern, CacheSetHelper &helper) {
-               PackageContainer cont(FNMATCH);
-               PackageContainerInterface::FromFnmatch(&cont, Cache, pattern, helper);
+       static PackageContainer FromFnmatch(pkgCacheFile &Cache, std::string const &pattern, CacheSetHelper &helper) {
+               PackageContainer cont(CacheSetHelper::FNMATCH);
+               helper.PackageFrom(CacheSetHelper::FNMATCH, &cont, Cache, pattern);

                return cont;
        }
        static PackageContainer FromFnMatch(pkgCacheFile &Cache, std::string const &pattern) {
                return cont;
        }
        static PackageContainer FromFnMatch(pkgCacheFile &Cache, std::string const &pattern) {


@@ -281,18 +509,20 @@ public:                                                                   /*{{{*/
                return FromFnmatch(Cache, pattern, helper);
        }
 
                return FromFnmatch(Cache, pattern, helper);
        }
 

+APT_IGNORE_DEPRECATED_PUSH

        /** \brief returns a package specified by a string
 
            \param Cache the package is in
            \param pattern String the package name should be extracted from
            \param helper responsible for error and message handling */
        /** \brief returns a package specified by a string
 
            \param Cache the package is in
            \param pattern String the package name should be extracted from
            \param helper responsible for error and message handling */

-       static pkgCache::PkgIterator FromName(pkgCacheFile &Cache, std::string const &pattern, CacheSetHelper &helper) {
-               return PackageContainerInterface::FromName(Cache, pattern, helper);
+       APT_DEPRECATED_MSG("Use helper.PackageFromName instead") static pkgCache::PkgIterator FromName(pkgCacheFile &Cache, std::string const &pattern, CacheSetHelper &helper) {
+               return helper.PackageFromName(Cache, pattern);

        }
        }

-       static pkgCache::PkgIterator FromName(pkgCacheFile &Cache, std::string const &pattern) {
+       APT_DEPRECATED_MSG("Use helper.PackageFromName instead") static pkgCache::PkgIterator FromName(pkgCacheFile &Cache, std::string const &pattern) {

                CacheSetHelper helper;
                CacheSetHelper helper;

-               return PackageContainerInterface::FromName(Cache, pattern, helper);
+               return FromName(Cache, pattern, helper);

        }
        }

+APT_IGNORE_DEPRECATED_POP

 
        /** \brief returns all packages specified by a string
 
 
        /** \brief returns all packages specified by a string
 


@@ -301,7 +531,7 @@ public:                                                                     /*{{{*/
            \param helper responsible for error and message handling */
        static PackageContainer FromString(pkgCacheFile &Cache, std::string const &pattern, CacheSetHelper &helper) {
                PackageContainer cont;
            \param helper responsible for error and message handling */
        static PackageContainer FromString(pkgCacheFile &Cache, std::string const &pattern, CacheSetHelper &helper) {
                PackageContainer cont;

-               PackageContainerInterface::FromString(&cont, Cache, pattern, helper);
+               helper.PackageFrom(CacheSetHelper::PACKAGENAME, &cont, Cache, pattern);

                return cont;
        }
        static PackageContainer FromString(pkgCacheFile &Cache, std::string const &pattern) {
                return cont;
        }
        static PackageContainer FromString(pkgCacheFile &Cache, std::string const &pattern) {


@@ -318,7 +548,7 @@ public:                                                                     /*{{{*/
            \param helper responsible for error and message handling */
        static PackageContainer FromCommandLine(pkgCacheFile &Cache, const char **cmdline, CacheSetHelper &helper) {
                PackageContainer cont;
            \param helper responsible for error and message handling */
        static PackageContainer FromCommandLine(pkgCacheFile &Cache, const char **cmdline, CacheSetHelper &helper) {
                PackageContainer cont;

-               PackageContainerInterface::FromCommandLine(&cont, Cache, cmdline, helper);
+               helper.PackageFromCommandLine(&cont, Cache, cmdline);

                return cont;
        }
        static PackageContainer FromCommandLine(pkgCacheFile &Cache, const char **cmdline) {
                return cont;
        }
        static PackageContainer FromCommandLine(pkgCacheFile &Cache, const char **cmdline) {


@@ -340,14 +570,14 @@ public:                                                                   /*{{{*/
        static std::map<unsigned short, PackageContainer> GroupedFromCommandLine(
                                                                                 pkgCacheFile &Cache,
                                                                                 const char **cmdline,
        static std::map<unsigned short, PackageContainer> GroupedFromCommandLine(
                                                                                 pkgCacheFile &Cache,
                                                                                 const char **cmdline,

-                                                                                std::list<Modifier> const &mods,
+                                                                                std::list<CacheSetHelper::PkgModifier> const &mods,

                                                                                 unsigned short const &fallback,
                                                                                 CacheSetHelper &helper) {
                std::map<unsigned short, PackageContainer> pkgsets;
                for (const char **I = cmdline; *I != 0; ++I) {
                        unsigned short modID = fallback;
                        PackageContainer pkgset;
                                                                                 unsigned short const &fallback,
                                                                                 CacheSetHelper &helper) {
                std::map<unsigned short, PackageContainer> pkgsets;
                for (const char **I = cmdline; *I != 0; ++I) {
                        unsigned short modID = fallback;
                        PackageContainer pkgset;

-                       PackageContainerInterface::FromModifierCommandLine(modID, &pkgset, Cache, *I, mods, helper);
+                       helper.PackageFromModifierCommandLine(modID, &pkgset, Cache, *I, mods);

                        pkgsets[modID].insert(pkgset);
                }
                return pkgsets;
                        pkgsets[modID].insert(pkgset);
                }
                return pkgsets;


@@ -355,23 +585,34 @@ public:                                                                   /*{{{*/
        static std::map<unsigned short, PackageContainer> GroupedFromCommandLine(
                                                                                 pkgCacheFile &Cache,
                                                                                 const char **cmdline,
        static std::map<unsigned short, PackageContainer> GroupedFromCommandLine(
                                                                                 pkgCacheFile &Cache,
                                                                                 const char **cmdline,

-                                                                                std::list<Modifier> const &mods,
+                                                                                std::list<CacheSetHelper::PkgModifier> const &mods,

                                                                                 unsigned short const &fallback) {
                CacheSetHelper helper;
                return GroupedFromCommandLine(Cache, cmdline,
                                mods, fallback, helper);
        }
                                                                        /*}}}*/
                                                                                 unsigned short const &fallback) {
                CacheSetHelper helper;
                return GroupedFromCommandLine(Cache, cmdline,
                                mods, fallback, helper);
        }
                                                                        /*}}}*/

-private:                                                               /*{{{*/
-       Constructor ConstructedBy;
-                                                                       /*}}}*/

 };                                                                     /*}}}*/
 };                                                                     /*}}}*/

-
+// various specialisations for PackageContainer                                /*{{{*/

 template<> template<class Cont> void PackageContainer<std::list<pkgCache::PkgIterator> >::insert(PackageContainer<Cont> const &pkgcont) {
        for (typename PackageContainer<Cont>::const_iterator p = pkgcont.begin(); p != pkgcont.end(); ++p)
                _cont.push_back(*p);
 }
 template<> template<class Cont> void PackageContainer<std::list<pkgCache::PkgIterator> >::insert(PackageContainer<Cont> const &pkgcont) {
        for (typename PackageContainer<Cont>::const_iterator p = pkgcont.begin(); p != pkgcont.end(); ++p)
                _cont.push_back(*p);
 }

-// these two are 'inline' as otherwise the linker has problems with seeing these untemplated
+#if __cplusplus >= 201103L
+template<> template<class Cont> void PackageContainer<std::forward_list<pkgCache::PkgIterator> >::insert(PackageContainer<Cont> const &pkgcont) {
+       for (typename PackageContainer<Cont>::const_iterator p = pkgcont.begin(); p != pkgcont.end(); ++p)
+               _cont.push_front(*p);
+}
+#endif
+template<> template<class Cont> void PackageContainer<std::deque<pkgCache::PkgIterator> >::insert(PackageContainer<Cont> const &pkgcont) {
+       for (typename PackageContainer<Cont>::const_iterator p = pkgcont.begin(); p != pkgcont.end(); ++p)
+               _cont.push_back(*p);
+}
+template<> template<class Cont> void PackageContainer<std::vector<pkgCache::PkgIterator> >::insert(PackageContainer<Cont> const &pkgcont) {
+       for (typename PackageContainer<Cont>::const_iterator p = pkgcont.begin(); p != pkgcont.end(); ++p)
+               _cont.push_back(*p);
+}
+// these are 'inline' as otherwise the linker has problems with seeing these untemplated

 // specializations again and again - but we need to see them, so that library users can use them
 template<> inline bool PackageContainer<std::list<pkgCache::PkgIterator> >::insert(pkgCache::PkgIterator const &P) {
        if (P.end() == true)
 // specializations again and again - but we need to see them, so that library users can use them
 template<> inline bool PackageContainer<std::list<pkgCache::PkgIterator> >::insert(pkgCache::PkgIterator const &P) {
        if (P.end() == true)


@@ -379,12 +620,138 @@ template<> inline bool PackageContainer<std::list<pkgCache::PkgIterator> >::inse
        _cont.push_back(P);
        return true;
 }
        _cont.push_back(P);
        return true;
 }

+#if __cplusplus >= 201103L
+template<> inline bool PackageContainer<std::forward_list<pkgCache::PkgIterator> >::insert(pkgCache::PkgIterator const &P) {
+       if (P.end() == true)
+               return false;
+       _cont.push_front(P);
+       return true;
+}
+#endif
+template<> inline bool PackageContainer<std::deque<pkgCache::PkgIterator> >::insert(pkgCache::PkgIterator const &P) {
+       if (P.end() == true)
+               return false;
+       _cont.push_back(P);
+       return true;
+}
+template<> inline bool PackageContainer<std::vector<pkgCache::PkgIterator> >::insert(pkgCache::PkgIterator const &P) {
+       if (P.end() == true)
+               return false;
+       _cont.push_back(P);
+       return true;
+}

 template<> inline void PackageContainer<std::list<pkgCache::PkgIterator> >::insert(const_iterator begin, const_iterator end) {
        for (const_iterator p = begin; p != end; ++p)
                _cont.push_back(*p);
 }
 template<> inline void PackageContainer<std::list<pkgCache::PkgIterator> >::insert(const_iterator begin, const_iterator end) {
        for (const_iterator p = begin; p != end; ++p)
                _cont.push_back(*p);
 }

+#if __cplusplus >= 201103L
+template<> inline void PackageContainer<std::forward_list<pkgCache::PkgIterator> >::insert(const_iterator begin, const_iterator end) {
+       for (const_iterator p = begin; p != end; ++p)
+               _cont.push_front(*p);
+}
+#endif
+template<> inline void PackageContainer<std::deque<pkgCache::PkgIterator> >::insert(const_iterator begin, const_iterator end) {
+       for (const_iterator p = begin; p != end; ++p)
+               _cont.push_back(*p);
+}
+template<> inline void PackageContainer<std::vector<pkgCache::PkgIterator> >::insert(const_iterator begin, const_iterator end) {
+       for (const_iterator p = begin; p != end; ++p)
+               _cont.push_back(*p);
+}
+#if APT_GCC_VERSION < 0x409
+template<> inline PackageContainer<std::set<pkgCache::PkgIterator> >::iterator PackageContainer<std::set<pkgCache::PkgIterator> >::erase(iterator i) {
+       _cont.erase(i._iter);
+       return end();
+}
+template<> inline PackageContainer<std::set<pkgCache::PkgIterator> >::iterator PackageContainer<std::set<pkgCache::PkgIterator> >::erase(iterator first, iterator last) {
+       _cont.erase(first, last);
+       return end();
+}
+#endif
+template<> template<class Compare> inline bool PackageContainer<std::vector<pkgCache::PkgIterator> >::sort(Compare Comp) {
+       std::sort(_cont.begin(), _cont.end(), Comp);
+       return true;
+}
+template<> template<class Compare> inline bool PackageContainer<std::list<pkgCache::PkgIterator> >::sort(Compare Comp) {
+       _cont.sort(Comp);
+       return true;
+}
+#if __cplusplus >= 201103L
+template<> template<class Compare> inline bool PackageContainer<std::forward_list<pkgCache::PkgIterator> >::sort(Compare Comp) {
+       _cont.sort(Comp);
+       return true;
+}
+#endif
+template<> template<class Compare> inline bool PackageContainer<std::deque<pkgCache::PkgIterator> >::sort(Compare Comp) {
+       std::sort(_cont.begin(), _cont.end(), Comp);
+       return true;
+}
+                                                                       /*}}}*/
+
+// class PackageUniverse - pkgCache as PackageContainerInterface       /*{{{*/
+/** \class PackageUniverse
+
+    Wraps around our usual pkgCache, so that it can be stuffed into methods
+    expecting a PackageContainer.
+
+    The wrapping is read-only in practice modeled by making erase and co
+    private methods. */
+class APT_PUBLIC PackageUniverse : public PackageContainerInterface {
+       pkgCache * const _cont;
+       void * const d;
+public:
+       class const_iterator : public APT::Container_iterator_base<APT::PackageContainerInterface, PackageUniverse, PackageUniverse::const_iterator, pkgCache::PkgIterator, pkgCache::PkgIterator>
+       {
+       public:
+          explicit const_iterator(pkgCache::PkgIterator i):
+             Container_iterator_base<APT::PackageContainerInterface, PackageUniverse, PackageUniverse::const_iterator, pkgCache::PkgIterator, pkgCache::PkgIterator>(i) {}
+
+          inline pkgCache::PkgIterator getType(void) const { return _iter; }
+       };
+       typedef const_iterator iterator;
+       typedef pkgCache::PkgIterator value_type;
+       typedef typename pkgCache::PkgIterator* pointer;
+       typedef typename pkgCache::PkgIterator const* const_pointer;
+       typedef const pkgCache::PkgIterator& const_reference;
+       typedef const_reference reference;
+       typedef const_iterator::difference_type difference_type;
+       typedef std::make_unsigned<const_iterator::difference_type>::type size_type;
+
+
+       bool empty() const APT_OVERRIDE { return false; }
+       size_t size() const APT_OVERRIDE { return _cont->Head().PackageCount; }
+
+       const_iterator begin() const { return const_iterator(_cont->PkgBegin()); }
+       const_iterator end() const { return const_iterator(_cont->PkgEnd()); }
+       const_iterator cbegin() const { return const_iterator(_cont->PkgBegin()); }
+       const_iterator cend() const { return const_iterator(_cont->PkgEnd()); }
+       iterator begin() { return iterator(_cont->PkgBegin()); }
+       iterator end() { return iterator(_cont->PkgEnd()); }
+
+       pkgCache * data() const { return _cont; }
+
+       explicit PackageUniverse(pkgCache * const Owner);
+       explicit PackageUniverse(pkgCacheFile * const Owner);
+       virtual ~PackageUniverse();
+
+private:
+       APT_HIDDEN bool insert(pkgCache::PkgIterator const &) APT_OVERRIDE { return true; }
+       template<class Cont> APT_HIDDEN void insert(PackageContainer<Cont> const &) { }
+       APT_HIDDEN void insert(const_iterator, const_iterator) { }
+
+       APT_HIDDEN void clear() APT_OVERRIDE { }
+       APT_HIDDEN iterator erase( const_iterator pos );
+       APT_HIDDEN iterator erase( const_iterator first, const_iterator last );
+};
+                                                                       /*}}}*/

 typedef PackageContainer<std::set<pkgCache::PkgIterator> > PackageSet;
 typedef PackageContainer<std::set<pkgCache::PkgIterator> > PackageSet;

+#if __cplusplus >= 201103L
+typedef PackageContainer<std::unordered_set<pkgCache::PkgIterator> > PackageUnorderedSet;
+typedef PackageContainer<std::forward_list<pkgCache::PkgIterator> > PackageForwardList;
+#endif

 typedef PackageContainer<std::list<pkgCache::PkgIterator> > PackageList;
 typedef PackageContainer<std::list<pkgCache::PkgIterator> > PackageList;

+typedef PackageContainer<std::deque<pkgCache::PkgIterator> > PackageDeque;
+typedef PackageContainer<std::vector<pkgCache::PkgIterator> > PackageVector;

 
 class VersionContainerInterface {                                      /*{{{*/
 /** \class APT::VersionContainerInterface
 
 class VersionContainerInterface {                                      /*{{{*/
 /** \class APT::VersionContainerInterface


@@ -392,79 +759,98 @@ class VersionContainerInterface {                                 /*{{{*/
     Same as APT::PackageContainerInterface, just for Versions */
 public:
        /** \brief smell like a pkgCache::VerIterator */
     Same as APT::PackageContainerInterface, just for Versions */
 public:
        /** \brief smell like a pkgCache::VerIterator */

-       class const_iterator {                                          /*{{{*/
+       template<class Itr> class iterator_base {                       /*{{{*/
+          pkgCache::VerIterator getType() const { return static_cast<Itr const*>(this)->getType(); };

        public:
        public:

-               virtual pkgCache::VerIterator getVer() const = 0;
-               operator pkgCache::VerIterator(void) { return getVer(); }
-
-               inline pkgCache *Cache() const { return getVer().Cache(); }
-               inline unsigned long Index() const {return getVer().Index();}
-               inline int CompareVer(const pkgCache::VerIterator &B) const { return getVer().CompareVer(B); }
-               inline const char *VerStr() const { return getVer().VerStr(); }
-               inline const char *Section() const { return getVer().Section(); }
-               inline const char *Arch() const { return getVer().Arch(); }
-               inline pkgCache::PkgIterator ParentPkg() const { return getVer().ParentPkg(); }
-               inline pkgCache::DescIterator DescriptionList() const { return getVer().DescriptionList(); }
-               inline pkgCache::DescIterator TranslatedDescription() const { return getVer().TranslatedDescription(); }
-               inline pkgCache::DepIterator DependsList() const { return getVer().DependsList(); }
-               inline pkgCache::PrvIterator ProvidesList() const { return getVer().ProvidesList(); }
-               inline pkgCache::VerFileIterator FileList() const { return getVer().FileList(); }
-               inline bool Downloadable() const { return getVer().Downloadable(); }
-               inline const char *PriorityType() const { return getVer().PriorityType(); }
-               inline std::string RelStr() const { return getVer().RelStr(); }
-               inline bool Automatic() const { return getVer().Automatic(); }
-               inline pkgCache::VerFileIterator NewestFile() const { return getVer().NewestFile(); }
+               operator pkgCache::VerIterator(void) { return getType(); }
+
+               inline pkgCache *Cache() const { return getType().Cache(); }
+               inline unsigned long Index() const {return getType().Index();}
+               inline int CompareVer(const pkgCache::VerIterator &B) const { return getType().CompareVer(B); }
+               inline const char *VerStr() const { return getType().VerStr(); }
+               inline const char *Section() const { return getType().Section(); }
+               inline const char *Arch() const { return getType().Arch(); }
+               inline pkgCache::PkgIterator ParentPkg() const { return getType().ParentPkg(); }
+               inline pkgCache::DescIterator DescriptionList() const { return getType().DescriptionList(); }
+               inline pkgCache::DescIterator TranslatedDescription() const { return getType().TranslatedDescription(); }
+               inline pkgCache::DepIterator DependsList() const { return getType().DependsList(); }
+               inline pkgCache::PrvIterator ProvidesList() const { return getType().ProvidesList(); }
+               inline pkgCache::VerFileIterator FileList() const { return getType().FileList(); }
+               inline bool Downloadable() const { return getType().Downloadable(); }
+               inline const char *PriorityType() const { return getType().PriorityType(); }
+               inline std::string RelStr() const { return getType().RelStr(); }
+               inline bool Automatic() const { return getType().Automatic(); }
+               inline pkgCache::VerFileIterator NewestFile() const { return getType().NewestFile(); }

                // we have only valid iterators here
                inline bool end() const { return false; }
 
                // we have only valid iterators here
                inline bool end() const { return false; }
 

-               inline pkgCache::Version const * operator->() const { return &*getVer(); }
+               inline pkgCache::Version const * operator->() const { return &*getType(); }

        };
                                                                        /*}}}*/
 
        virtual bool insert(pkgCache::VerIterator const &V) = 0;
        virtual bool empty() const = 0;
        virtual void clear() = 0;
        };
                                                                        /*}}}*/
 
        virtual bool insert(pkgCache::VerIterator const &V) = 0;
        virtual bool empty() const = 0;
        virtual void clear() = 0;

+       virtual size_t size() const = 0;

 
        /** \brief specifies which version(s) will be returned if non is given */
 
        /** \brief specifies which version(s) will be returned if non is given */

-       enum Version {
-               /** All versions */
-               ALL,
-               /** Candidate and installed version */
-               CANDANDINST,
-               /** Candidate version */
-               CANDIDATE,
-               /** Installed version */
-               INSTALLED,
-               /** Candidate or if non installed version */
-               CANDINST,
-               /** Installed or if non candidate version */
-               INSTCAND,
-               /** Newest version */
-               NEWEST
+       enum APT_DEPRECATED_MSG("enum moved to CacheSetHelper::VerSelector instead") Version {
+               ALL = CacheSetHelper::ALL,
+               CANDANDINST = CacheSetHelper::CANDANDINST,
+               CANDIDATE = CacheSetHelper::CANDIDATE,
+               INSTALLED = CacheSetHelper::INSTALLED,
+               CANDINST = CacheSetHelper::CANDINST,
+               INSTCAND = CacheSetHelper::INSTCAND,
+               NEWEST = CacheSetHelper::NEWEST

        };
 
        struct Modifier {
        };
 
        struct Modifier {

-               enum Position { NONE, PREFIX, POSTFIX };
-               unsigned short ID;
+               unsigned short const ID;

                const char * const Alias;
                const char * const Alias;

-               Position Pos;
-               Version SelectVersion;
+               enum Position { NONE, PREFIX, POSTFIX } const Pos;
+               enum CacheSetHelper::VerSelector const SelectVersion;

                Modifier (unsigned short const &id, const char * const alias, Position const &pos,
                Modifier (unsigned short const &id, const char * const alias, Position const &pos,

-                         Version const &select) : ID(id), Alias(alias), Pos(pos),
+                         enum CacheSetHelper::VerSelector const select) : ID(id), Alias(alias), Pos(pos),

                         SelectVersion(select) {}
                         SelectVersion(select) {}

+APT_IGNORE_DEPRECATED_PUSH
+               APT_DEPRECATED_MSG("Construct with a CacheSetHelper::VerSelector instead") Modifier(unsigned short const &id, const char * const alias, Position const &pos,
+                         Version const &select) : ID(id), Alias(alias), Pos(pos),
+                        SelectVersion((CacheSetHelper::VerSelector)select) {}
+APT_IGNORE_DEPRECATED_POP

        };
 
        static bool FromCommandLine(VersionContainerInterface * const vci, pkgCacheFile &Cache,
        };
 
        static bool FromCommandLine(VersionContainerInterface * const vci, pkgCacheFile &Cache,

-                                   const char **cmdline, Version const &fallback,
+                                   const char **cmdline, CacheSetHelper::VerSelector const fallback,

                                    CacheSetHelper &helper);
                                    CacheSetHelper &helper);

+APT_IGNORE_DEPRECATED_PUSH
+       APT_DEPRECATED_MSG("Use CacheSetHelper::VerSelector as fallback selector") static bool FromCommandLine(VersionContainerInterface * const vci, pkgCacheFile &Cache,
+                                   const char **cmdline, Version const &fallback,
+                                   CacheSetHelper &helper) {
+          return FromCommandLine(vci, Cache, cmdline, (CacheSetHelper::VerSelector)fallback, helper);
+       }
+APT_IGNORE_DEPRECATED_POP

 
        static bool FromString(VersionContainerInterface * const vci, pkgCacheFile &Cache,
 
        static bool FromString(VersionContainerInterface * const vci, pkgCacheFile &Cache,

-                              std::string pkg, Version const &fallback, CacheSetHelper &helper,
+                              std::string pkg, CacheSetHelper::VerSelector const fallback, CacheSetHelper &helper,

                               bool const onlyFromName = false);
                               bool const onlyFromName = false);

+APT_IGNORE_DEPRECATED_PUSH
+       APT_DEPRECATED_MSG("Use CacheSetHelper::VerSelector as fallback selector") static bool FromString(VersionContainerInterface * const vci, pkgCacheFile &Cache,
+                              std::string pkg, Version const &fallback, CacheSetHelper &helper,
+                              bool const onlyFromName = false) {
+          return FromString(vci, Cache, pkg, (CacheSetHelper::VerSelector)fallback, helper, onlyFromName);
+       }
+APT_IGNORE_DEPRECATED_POP

 
        static bool FromPackage(VersionContainerInterface * const vci, pkgCacheFile &Cache,
 
        static bool FromPackage(VersionContainerInterface * const vci, pkgCacheFile &Cache,

-                               pkgCache::PkgIterator const &P, Version const &fallback,
+                               pkgCache::PkgIterator const &P, CacheSetHelper::VerSelector const fallback,

                                CacheSetHelper &helper);
                                CacheSetHelper &helper);

+APT_IGNORE_DEPRECATED_PUSH
+       APT_DEPRECATED_MSG("Use CacheSetHelper::VerSelector as fallback selector") static bool FromPackage(VersionContainerInterface * const vci, pkgCacheFile &Cache,
+                               pkgCache::PkgIterator const &P, Version const &fallback,
+                               CacheSetHelper &helper) {
+          return FromPackage(vci, Cache, P, (CacheSetHelper::VerSelector)fallback, helper);
+       }
+APT_IGNORE_DEPRECATED_POP

 
        static bool FromModifierCommandLine(unsigned short &modID,
                                            VersionContainerInterface * const vci,
 
        static bool FromModifierCommandLine(unsigned short &modID,
                                            VersionContainerInterface * const vci,


@@ -476,8 +862,23 @@ public:
        static bool FromDependency(VersionContainerInterface * const vci,
                                   pkgCacheFile &Cache,
                                   pkgCache::DepIterator const &D,
        static bool FromDependency(VersionContainerInterface * const vci,
                                   pkgCacheFile &Cache,
                                   pkgCache::DepIterator const &D,

-                                  Version const &selector,
+                                  CacheSetHelper::VerSelector const selector,

                                   CacheSetHelper &helper);
                                   CacheSetHelper &helper);

+APT_IGNORE_DEPRECATED_PUSH
+       APT_DEPRECATED_MSG("Use CacheSetHelper::VerSelector as fallback selector") static bool FromDependency(VersionContainerInterface * const vci,
+                                  pkgCacheFile &Cache,
+                                  pkgCache::DepIterator const &D,
+                                  Version const &selector,
+                                  CacheSetHelper &helper) {
+          return FromDependency(vci, Cache, D, (CacheSetHelper::VerSelector)selector, helper);
+       }
+APT_IGNORE_DEPRECATED_POP
+
+       VersionContainerInterface();
+       VersionContainerInterface& operator=(VersionContainerInterface const &other);
+       virtual ~VersionContainerInterface();
+private:
+       void * const d;

 
 protected:                                                             /*{{{*/
 
 
 protected:                                                             /*{{{*/
 


@@ -507,58 +908,70 @@ template<class Container> class VersionContainer : public VersionContainerInterf
     pkgCache. */
        Container _cont;
 public:                                                                        /*{{{*/
     pkgCache. */
        Container _cont;
 public:                                                                        /*{{{*/

-       /** \brief smell like a pkgCache::VerIterator */
-       class const_iterator : public VersionContainerInterface::const_iterator,
-                              public std::iterator<std::forward_iterator_tag, typename Container::const_iterator> {/*{{{*/
-               typename Container::const_iterator _iter;
-       public:
-               const_iterator(typename Container::const_iterator i) : _iter(i) {}
-               pkgCache::VerIterator getVer(void) const { return *_iter; }
-               inline pkgCache::VerIterator operator*(void) const { return *_iter; }
-               operator typename Container::const_iterator(void) const { return _iter; }
-               inline const_iterator& operator++() { ++_iter; return *this; }
-               inline const_iterator operator++(int) { const_iterator tmp(*this); operator++(); return tmp; }
-               inline bool operator!=(const_iterator const &i) const { return _iter != i._iter; }
-               inline bool operator==(const_iterator const &i) const { return _iter == i._iter; }
-               friend std::ostream& operator<<(std::ostream& out, const_iterator i) { return operator<<(out, *i); }
-       };
-       class iterator : public VersionContainerInterface::const_iterator,
-                        public std::iterator<std::forward_iterator_tag, typename Container::iterator> {
-               typename Container::iterator _iter;
-       public:
-               iterator(typename Container::iterator i) : _iter(i) {}
-               pkgCache::VerIterator getVer(void) const { return *_iter; }
-               inline pkgCache::VerIterator operator*(void) const { return *_iter; }
-               operator typename Container::iterator(void) const { return _iter; }
-               operator typename VersionContainer<Container>::const_iterator() { return typename VersionContainer<Container>::const_iterator(_iter); }
-               inline iterator& operator++() { ++_iter; return *this; }
-               inline iterator operator++(int) { iterator tmp(*this); operator++(); return tmp; }
-               inline bool operator!=(iterator const &i) const { return _iter != i._iter; }
-               inline bool operator==(iterator const &i) const { return _iter == i._iter; }
-               inline iterator& operator=(iterator const &i) { _iter = i._iter; return *this; }
-               inline iterator& operator=(typename Container::iterator const &i) { _iter = i; return *this; }
-               friend std::ostream& operator<<(std::ostream& out, iterator i) { return operator<<(out, *i); }
-       };
-                                                                       /*}}}*/

 
 

-       bool insert(pkgCache::VerIterator const &V) { if (V.end() == true) return false; _cont.insert(V); return true; }
+       typedef Container_const_iterator<VersionContainerInterface, Container, VersionContainer> const_iterator;
+       typedef Container_iterator<VersionContainerInterface, Container, VersionContainer> iterator;
+       typedef Container_const_reverse_iterator<VersionContainerInterface, Container, VersionContainer> const_reverse_iterator;
+       typedef Container_reverse_iterator<VersionContainerInterface, Container, VersionContainer> reverse_iterator;
+       typedef typename Container::value_type value_type;
+       typedef typename Container::pointer pointer;
+       typedef typename Container::const_pointer const_pointer;
+       typedef typename Container::reference reference;
+       typedef typename Container::const_reference const_reference;
+       typedef typename Container::difference_type difference_type;
+       typedef typename Container::size_type size_type;
+       typedef typename Container::allocator_type allocator_type;
+
+       bool insert(pkgCache::VerIterator const &V) APT_OVERRIDE { if (V.end() == true) return false; _cont.insert(V); return true; }

        template<class Cont> void insert(VersionContainer<Cont> const &vercont) { _cont.insert((typename Cont::const_iterator)vercont.begin(), (typename Cont::const_iterator)vercont.end()); }
        void insert(const_iterator begin, const_iterator end) { _cont.insert(begin, end); }
        template<class Cont> void insert(VersionContainer<Cont> const &vercont) { _cont.insert((typename Cont::const_iterator)vercont.begin(), (typename Cont::const_iterator)vercont.end()); }
        void insert(const_iterator begin, const_iterator end) { _cont.insert(begin, end); }

-       bool empty() const { return _cont.empty(); }
-       void clear() { return _cont.clear(); }
-       //FIXME: on ABI break, replace the first with the second without bool
-       void erase(iterator position) { _cont.erase((typename Container::iterator)position); }
-       iterator& erase(iterator &position, bool) { return position = _cont.erase((typename Container::iterator)position); }
-       size_t erase(const pkgCache::VerIterator x) { return _cont.erase(x); }
-       void erase(iterator first, iterator last) { _cont.erase(first, last); }
-       size_t size() const { return _cont.size(); }
-
+       bool empty() const APT_OVERRIDE { return _cont.empty(); }
+       void clear() APT_OVERRIDE { return _cont.clear(); }
+       size_t size() const APT_OVERRIDE { return _cont.size(); }
+#if APT_GCC_VERSION >= 0x409
+       iterator erase( const_iterator pos ) { return iterator(_cont.erase(pos._iter)); }
+       iterator erase( const_iterator first, const_iterator last ) { return iterator(_cont.erase(first._iter, last._iter)); }
+#else
+       iterator erase( iterator pos ) { return iterator(_cont.erase(pos._iter)); }
+       iterator erase( iterator first, iterator last ) { return iterator(_cont.erase(first._iter, last._iter)); }
+#endif

        const_iterator begin() const { return const_iterator(_cont.begin()); }
        const_iterator end() const { return const_iterator(_cont.end()); }
        const_iterator begin() const { return const_iterator(_cont.begin()); }
        const_iterator end() const { return const_iterator(_cont.end()); }

+       const_reverse_iterator rbegin() const { return const_reverse_iterator(_cont.rbegin()); }
+       const_reverse_iterator rend() const { return const_reverse_iterator(_cont.rend()); }
+#if __cplusplus >= 201103L
+       const_iterator cbegin() const { return const_iterator(_cont.cbegin()); }
+       const_iterator cend() const { return const_iterator(_cont.cend()); }
+       const_reverse_iterator crbegin() const { return const_reverse_iterator(_cont.crbegin()); }
+       const_reverse_iterator crend() const { return const_reverse_iterator(_cont.crend()); }
+#endif

        iterator begin() { return iterator(_cont.begin()); }
        iterator end() { return iterator(_cont.end()); }
        iterator begin() { return iterator(_cont.begin()); }
        iterator end() { return iterator(_cont.end()); }

+       reverse_iterator rbegin() { return reverse_iterator(_cont.rbegin()); }
+       reverse_iterator rend() { return reverse_iterator(_cont.rend()); }

        const_iterator find(pkgCache::VerIterator const &V) const { return const_iterator(_cont.find(V)); }
 
        const_iterator find(pkgCache::VerIterator const &V) const { return const_iterator(_cont.find(V)); }
 

+       VersionContainer() : VersionContainerInterface() {}
+       template<typename Itr> VersionContainer(Itr first, Itr last) : VersionContainerInterface(), _cont(first, last) {}
+#if __cplusplus >= 201103L
+       VersionContainer(std::initializer_list<value_type> list) : VersionContainerInterface(), _cont(list) {}
+       void push_back(value_type&& P) { _cont.emplace_back(std::move(P)); }
+       template<typename... Args> void emplace_back(Args&&... args) { _cont.emplace_back(std::forward<Args>(args)...); }
+#endif
+       void push_back(const value_type& P) { _cont.push_back(P); }
+
+       /** \brief sort all included versions with given comparer
+
+           Some containers are sorted by default, some are not and can't be,
+           but a few like std::vector can be sorted if need be, so this can be
+           specialized in later on. The default is that this will fail though.
+           Specifically, already sorted containers like std::set will return
+           false as well as there is no easy way to check that the given comparer
+           would sort in the same way the set is currently sorted
+
+           \return \b true if the set was sorted, \b false if not. */
+       template<class Compare> bool sort(Compare /*Comp*/) { return false; }
+

        /** \brief returns all versions specified on the commandline
 
            Get all versions from the commandline, uses given default version if
        /** \brief returns all versions specified on the commandline
 
            Get all versions from the commandline, uses given default version if


@@ -568,35 +981,59 @@ public:                                                                   /*{{{*/
            \param fallback version specification
            \param helper responsible for error and message handling */
        static VersionContainer FromCommandLine(pkgCacheFile &Cache, const char **cmdline,
            \param fallback version specification
            \param helper responsible for error and message handling */
        static VersionContainer FromCommandLine(pkgCacheFile &Cache, const char **cmdline,

-                       Version const &fallback, CacheSetHelper &helper) {
+                       CacheSetHelper::VerSelector const fallback, CacheSetHelper &helper) {

                VersionContainer vercon;
                VersionContainerInterface::FromCommandLine(&vercon, Cache, cmdline, fallback, helper);
                return vercon;
        }
        static VersionContainer FromCommandLine(pkgCacheFile &Cache, const char **cmdline,
                VersionContainer vercon;
                VersionContainerInterface::FromCommandLine(&vercon, Cache, cmdline, fallback, helper);
                return vercon;
        }
        static VersionContainer FromCommandLine(pkgCacheFile &Cache, const char **cmdline,

-                       Version const &fallback) {
+                       CacheSetHelper::VerSelector const fallback) {

                CacheSetHelper helper;
                return FromCommandLine(Cache, cmdline, fallback, helper);
        }
        static VersionContainer FromCommandLine(pkgCacheFile &Cache, const char **cmdline) {
                CacheSetHelper helper;
                return FromCommandLine(Cache, cmdline, fallback, helper);
        }
        static VersionContainer FromCommandLine(pkgCacheFile &Cache, const char **cmdline) {

-               return FromCommandLine(Cache, cmdline, CANDINST);
+               return FromCommandLine(Cache, cmdline, CacheSetHelper::CANDINST);

        }
        }

-

        static VersionContainer FromString(pkgCacheFile &Cache, std::string const &pkg,
        static VersionContainer FromString(pkgCacheFile &Cache, std::string const &pkg,

-                       Version const &fallback, CacheSetHelper &helper,
+                       CacheSetHelper::VerSelector const fallback, CacheSetHelper &helper,

                                            bool const /*onlyFromName = false*/) {
                VersionContainer vercon;
                VersionContainerInterface::FromString(&vercon, Cache, pkg, fallback, helper);
                return vercon;
        }
        static VersionContainer FromString(pkgCacheFile &Cache, std::string pkg,
                                            bool const /*onlyFromName = false*/) {
                VersionContainer vercon;
                VersionContainerInterface::FromString(&vercon, Cache, pkg, fallback, helper);
                return vercon;
        }
        static VersionContainer FromString(pkgCacheFile &Cache, std::string pkg,

-                       Version const &fallback) {
+                       CacheSetHelper::VerSelector const fallback) {

                CacheSetHelper helper;
                return FromString(Cache, pkg, fallback, helper);
        }
        static VersionContainer FromString(pkgCacheFile &Cache, std::string pkg) {
                CacheSetHelper helper;
                return FromString(Cache, pkg, fallback, helper);
        }
        static VersionContainer FromString(pkgCacheFile &Cache, std::string pkg) {

-               return FromString(Cache, pkg, CANDINST);
+               return FromString(Cache, pkg, CacheSetHelper::CANDINST);
+       }
+APT_IGNORE_DEPRECATED_PUSH
+       static VersionContainer FromCommandLine(pkgCacheFile &Cache, const char **cmdline,
+                       Version const &fallback, CacheSetHelper &helper) {
+               VersionContainer vercon;
+               VersionContainerInterface::FromCommandLine(&vercon, Cache, cmdline, (CacheSetHelper::VerSelector)fallback, helper);
+               return vercon;
+       }
+       static VersionContainer FromCommandLine(pkgCacheFile &Cache, const char **cmdline,
+                       Version const &fallback) {
+               CacheSetHelper helper;
+               return FromCommandLine(Cache, cmdline, (CacheSetHelper::VerSelector)fallback, helper);
+       }
+       static VersionContainer FromString(pkgCacheFile &Cache, std::string const &pkg,
+                       Version const &fallback, CacheSetHelper &helper,
+                                           bool const /*onlyFromName = false*/) {
+               VersionContainer vercon;
+               VersionContainerInterface::FromString(&vercon, Cache, pkg, (CacheSetHelper::VerSelector)fallback, helper);
+               return vercon;
+       }
+       static VersionContainer FromString(pkgCacheFile &Cache, std::string pkg,
+                       Version const &fallback) {
+               CacheSetHelper helper;
+               return FromString(Cache, pkg, (CacheSetHelper::VerSelector)fallback, helper);

        }
        }

+APT_IGNORE_DEPRECATED_POP

 
        /** \brief returns all versions specified for the package
 
 
        /** \brief returns all versions specified for the package
 


@@ -605,18 +1042,31 @@ public:                                                                  /*{{{*/
            \param fallback the version(s) you want to get
            \param helper the helper used for display and error handling */
        static VersionContainer FromPackage(pkgCacheFile &Cache, pkgCache::PkgIterator const &P,
            \param fallback the version(s) you want to get
            \param helper the helper used for display and error handling */
        static VersionContainer FromPackage(pkgCacheFile &Cache, pkgCache::PkgIterator const &P,

-               Version const &fallback, CacheSetHelper &helper) {
+               CacheSetHelper::VerSelector const fallback, CacheSetHelper &helper) {

                VersionContainer vercon;
                VersionContainerInterface::FromPackage(&vercon, Cache, P, fallback, helper);
                return vercon;
        }
        static VersionContainer FromPackage(pkgCacheFile &Cache, pkgCache::PkgIterator const &P,
                VersionContainer vercon;
                VersionContainerInterface::FromPackage(&vercon, Cache, P, fallback, helper);
                return vercon;
        }
        static VersionContainer FromPackage(pkgCacheFile &Cache, pkgCache::PkgIterator const &P,

-                                           Version const &fallback) {
+                                           CacheSetHelper::VerSelector const fallback) {

                CacheSetHelper helper;
                return FromPackage(Cache, P, fallback, helper);
        }
                CacheSetHelper helper;
                return FromPackage(Cache, P, fallback, helper);
        }

+APT_IGNORE_DEPRECATED_PUSH
+       static VersionContainer FromPackage(pkgCacheFile &Cache, pkgCache::PkgIterator const &P,
+               Version const &fallback, CacheSetHelper &helper) {
+               VersionContainer vercon;
+               VersionContainerInterface::FromPackage(&vercon, Cache, P, (CacheSetHelper::VerSelector)fallback, helper);
+               return vercon;
+       }
+       static VersionContainer FromPackage(pkgCacheFile &Cache, pkgCache::PkgIterator const &P,
+                                           Version const &fallback) {
+               CacheSetHelper helper;
+               return FromPackage(Cache, P, (CacheSetHelper::VerSelector)fallback, helper);
+       }
+APT_IGNORE_DEPRECATED_POP

        static VersionContainer FromPackage(pkgCacheFile &Cache, pkgCache::PkgIterator const &P) {
        static VersionContainer FromPackage(pkgCacheFile &Cache, pkgCache::PkgIterator const &P) {

-               return FromPackage(Cache, P, CANDIDATE);
+               return FromPackage(Cache, P, CacheSetHelper::CANDIDATE);

        }
 
        static std::map<unsigned short, VersionContainer> GroupedFromCommandLine(
        }
 
        static std::map<unsigned short, VersionContainer> GroupedFromCommandLine(


@@ -645,27 +1095,54 @@ public:                                                                  /*{{{*/
        }
 
        static VersionContainer FromDependency(pkgCacheFile &Cache, pkgCache::DepIterator const &D,
        }
 
        static VersionContainer FromDependency(pkgCacheFile &Cache, pkgCache::DepIterator const &D,

-                                              Version const &selector, CacheSetHelper &helper) {
+                                              CacheSetHelper::VerSelector const selector, CacheSetHelper &helper) {

                VersionContainer vercon;
                VersionContainerInterface::FromDependency(&vercon, Cache, D, selector, helper);
                return vercon;
        }
                VersionContainer vercon;
                VersionContainerInterface::FromDependency(&vercon, Cache, D, selector, helper);
                return vercon;
        }

+       static VersionContainer FromDependency(pkgCacheFile &Cache, pkgCache::DepIterator const &D,
+                                              CacheSetHelper::VerSelector const selector) {
+               CacheSetHelper helper;
+               return FromDependency(Cache, D, selector, helper);
+       }
+APT_IGNORE_DEPRECATED_PUSH
+       static VersionContainer FromDependency(pkgCacheFile &Cache, pkgCache::DepIterator const &D,
+                                              Version const &selector, CacheSetHelper &helper) {
+               VersionContainer vercon;
+               VersionContainerInterface::FromDependency(&vercon, Cache, D, (CacheSetHelper::VerSelector)selector, helper);
+               return vercon;
+       }

        static VersionContainer FromDependency(pkgCacheFile &Cache, pkgCache::DepIterator const &D,
                                               Version const &selector) {
                CacheSetHelper helper;
        static VersionContainer FromDependency(pkgCacheFile &Cache, pkgCache::DepIterator const &D,
                                               Version const &selector) {
                CacheSetHelper helper;

-               return FromPackage(Cache, D, selector, helper);
+               return FromDependency(Cache, D, (CacheSetHelper::VerSelector)selector, helper);

        }
        }

+APT_IGNORE_DEPRECATED_POP

        static VersionContainer FromDependency(pkgCacheFile &Cache, pkgCache::DepIterator const &D) {
        static VersionContainer FromDependency(pkgCacheFile &Cache, pkgCache::DepIterator const &D) {

-               return FromPackage(Cache, D, CANDIDATE);
+               return FromDependency(Cache, D, CacheSetHelper::CANDIDATE);

        }
                                                                        /*}}}*/
 };                                                                     /*}}}*/
        }
                                                                        /*}}}*/
 };                                                                     /*}}}*/

-
+// various specialisations for VersionContainer                                /*{{{*/

 template<> template<class Cont> void VersionContainer<std::list<pkgCache::VerIterator> >::insert(VersionContainer<Cont> const &vercont) {
        for (typename VersionContainer<Cont>::const_iterator v = vercont.begin(); v != vercont.end(); ++v)
                _cont.push_back(*v);
 }
 template<> template<class Cont> void VersionContainer<std::list<pkgCache::VerIterator> >::insert(VersionContainer<Cont> const &vercont) {
        for (typename VersionContainer<Cont>::const_iterator v = vercont.begin(); v != vercont.end(); ++v)
                _cont.push_back(*v);
 }

-// these two are 'inline' as otherwise the linker has problems with seeing these untemplated
+#if __cplusplus >= 201103L
+template<> template<class Cont> void VersionContainer<std::forward_list<pkgCache::VerIterator> >::insert(VersionContainer<Cont> const &vercont) {
+       for (typename VersionContainer<Cont>::const_iterator v = vercont.begin(); v != vercont.end(); ++v)
+               _cont.push_front(*v);
+}
+#endif
+template<> template<class Cont> void VersionContainer<std::deque<pkgCache::VerIterator> >::insert(VersionContainer<Cont> const &vercont) {
+       for (typename VersionContainer<Cont>::const_iterator v = vercont.begin(); v != vercont.end(); ++v)
+               _cont.push_back(*v);
+}
+template<> template<class Cont> void VersionContainer<std::vector<pkgCache::VerIterator> >::insert(VersionContainer<Cont> const &vercont) {
+       for (typename VersionContainer<Cont>::const_iterator v = vercont.begin(); v != vercont.end(); ++v)
+               _cont.push_back(*v);
+}
+// these are 'inline' as otherwise the linker has problems with seeing these untemplated

 // specializations again and again - but we need to see them, so that library users can use them
 template<> inline bool VersionContainer<std::list<pkgCache::VerIterator> >::insert(pkgCache::VerIterator const &V) {
        if (V.end() == true)
 // specializations again and again - but we need to see them, so that library users can use them
 template<> inline bool VersionContainer<std::list<pkgCache::VerIterator> >::insert(pkgCache::VerIterator const &V) {
        if (V.end() == true)


@@ -673,11 +1150,81 @@ template<> inline bool VersionContainer<std::list<pkgCache::VerIterator> >::inse
        _cont.push_back(V);
        return true;
 }
        _cont.push_back(V);
        return true;
 }

+#if __cplusplus >= 201103L
+template<> inline bool VersionContainer<std::forward_list<pkgCache::VerIterator> >::insert(pkgCache::VerIterator const &V) {
+       if (V.end() == true)
+               return false;
+       _cont.push_front(V);
+       return true;
+}
+#endif
+template<> inline bool VersionContainer<std::deque<pkgCache::VerIterator> >::insert(pkgCache::VerIterator const &V) {
+       if (V.end() == true)
+               return false;
+       _cont.push_back(V);
+       return true;
+}
+template<> inline bool VersionContainer<std::vector<pkgCache::VerIterator> >::insert(pkgCache::VerIterator const &V) {
+       if (V.end() == true)
+               return false;
+       _cont.push_back(V);
+       return true;
+}

 template<> inline void VersionContainer<std::list<pkgCache::VerIterator> >::insert(const_iterator begin, const_iterator end) {
        for (const_iterator v = begin; v != end; ++v)
                _cont.push_back(*v);
 }
 template<> inline void VersionContainer<std::list<pkgCache::VerIterator> >::insert(const_iterator begin, const_iterator end) {
        for (const_iterator v = begin; v != end; ++v)
                _cont.push_back(*v);
 }

+#if __cplusplus >= 201103L
+template<> inline void VersionContainer<std::forward_list<pkgCache::VerIterator> >::insert(const_iterator begin, const_iterator end) {
+       for (const_iterator v = begin; v != end; ++v)
+               _cont.push_front(*v);
+}
+#endif
+template<> inline void VersionContainer<std::deque<pkgCache::VerIterator> >::insert(const_iterator begin, const_iterator end) {
+       for (const_iterator v = begin; v != end; ++v)
+               _cont.push_back(*v);
+}
+template<> inline void VersionContainer<std::vector<pkgCache::VerIterator> >::insert(const_iterator begin, const_iterator end) {
+       for (const_iterator v = begin; v != end; ++v)
+               _cont.push_back(*v);
+}
+#if APT_GCC_VERSION < 0x409
+template<> inline VersionContainer<std::set<pkgCache::VerIterator> >::iterator VersionContainer<std::set<pkgCache::VerIterator> >::erase(iterator i) {
+       _cont.erase(i._iter);
+       return end();
+}
+template<> inline VersionContainer<std::set<pkgCache::VerIterator> >::iterator VersionContainer<std::set<pkgCache::VerIterator> >::erase(iterator first, iterator last) {
+       _cont.erase(first, last);
+       return end();
+}
+#endif
+template<> template<class Compare> inline bool VersionContainer<std::vector<pkgCache::VerIterator> >::sort(Compare Comp) {
+       std::sort(_cont.begin(), _cont.end(), Comp);
+       return true;
+}
+template<> template<class Compare> inline bool VersionContainer<std::list<pkgCache::VerIterator> >::sort(Compare Comp) {
+       _cont.sort(Comp);
+       return true;
+}
+#if __cplusplus >= 201103L
+template<> template<class Compare> inline bool VersionContainer<std::forward_list<pkgCache::VerIterator> >::sort(Compare Comp) {
+       _cont.sort(Comp);
+       return true;
+}
+#endif
+template<> template<class Compare> inline bool VersionContainer<std::deque<pkgCache::VerIterator> >::sort(Compare Comp) {
+       std::sort(_cont.begin(), _cont.end(), Comp);
+       return true;
+}
+                                                                       /*}}}*/
+

 typedef VersionContainer<std::set<pkgCache::VerIterator> > VersionSet;
 typedef VersionContainer<std::set<pkgCache::VerIterator> > VersionSet;

+#if __cplusplus >= 201103L
+typedef VersionContainer<std::unordered_set<pkgCache::VerIterator> > VersionUnorderedSet;
+typedef VersionContainer<std::forward_list<pkgCache::VerIterator> > VersionForwardList;
+#endif

 typedef VersionContainer<std::list<pkgCache::VerIterator> > VersionList;
 typedef VersionContainer<std::list<pkgCache::VerIterator> > VersionList;

+typedef VersionContainer<std::deque<pkgCache::VerIterator> > VersionDeque;
+typedef VersionContainer<std::vector<pkgCache::VerIterator> > VersionVector;

 }
 #endif
 }
 #endif