Added --use-stl to cnfigure, wxUSE_STL to setup0.h

Moved wx/datetime.inl contents to wx/datetime.h and removed
inline redefinition hack.
  Implemented STL-like interface on top of wxList/wxArray, when wxUSE_STL=0.
  Implemented wxList-like and wxArray interfaces on top of std::list and
std::vector, when wxUSE_STL=1.
  Added arrstr.h, moved wxArrayString declaration there; string.h
#includes arrstr.h only if WXWIN_COMPATIBILITY_2_4 is enabled.
  Added WX_CLEAR_HASH_MAP, WX_CLEAR_HASH_TABLE, WX_CLEAR_LIST macros,
to clear a wxHashMap, wxHashTable, wxList containing pointers: deletes
pointers and makes container zero-sized.
  When wxUSE_STL=1, wxStringList works like a std::list<wxString>.
  Made wxBase compile when wxUSE_STL=1.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@21768 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/hashmap.h

@@ -563,5 +563,19 @@ public: \
     _WX_DECLARE_HASH_MAP( void*, VALUE_T, wxPointerHash, wxPointerEqual, \
                           CLASSNAME, class WXDLLEXPORT )
 
+// delete all hash elements
+//
+// NB: the class declaration of the hash elements must be visible from the
+//     place where you use this macro, otherwise the proper destructor may not
+//     be called (a decent compiler should give a warning about it, but don't
+//     count on it)!
+#define WX_CLEAR_HASH_MAP(type, hashmap)                                     \
+    {                                                                        \
+        type##::iterator it, en;                                             \
+        for( it = (hashmap).begin(), en = (hashmap).end(); it != en; ++it )  \
+            delete it->second;                                               \
+        (hashmap).clear();                                                   \
+    }
+
 #endif // _WX_HASHMAP_H_