[Boost-commit] svn:boost r65805 - sandbox/variadic_templates/libs/composite_storage/sandbox

Subject: [Boost-commit] svn:boost r65805 - sandbox/variadic_templates/libs/composite_storage/sandbox
From: cppljevans_at_[hidden]
Date: 2010-10-07 10:34:41

Author: cppljevans
Date: 2010-10-07 10:34:38 EDT (Thu, 07 Oct 2010)
New Revision: 65805
URL: http://svn.boost.org/trac/boost/changeset/65805

Log:
WHAT:
  Added aligned size output together with comments
  explaining why it's used.
WHY:
  Previous output showed different size values for
  tagPs and Ptags.  This shows the same aligned size.  

Text files modified: 
   sandbox/variadic_templates/libs/composite_storage/sandbox/layout_all.1.cpp |    31 +++++++++++++++++++++++++++++--         
   1 files changed, 29 insertions(+), 2 deletions(-)

Modified: sandbox/variadic_templates/libs/composite_storage/sandbox/layout_all.1.cpp
==============================================================================
--- sandbox/variadic_templates/libs/composite_storage/sandbox/layout_all.1.cpp	(original)
+++ sandbox/variadic_templates/libs/composite_storage/sandbox/layout_all.1.cpp	2010-10-07 10:34:38 EDT (Thu, 07 Oct 2010)
@@ -143,6 +143,34 @@
         HeadComposed head;
         this->operator()(head);
     }
+    
+      template
+      < typename Composed
+      >
+        static
+      void
+    _(void)
+    {
+          typedef 
+        alignment::aligned_offset
+        < Composed::size
+        , Composed::align
+        >
+      aligned_offset
+       /* aligned_offset::value is the size required
+        * to assure that when two elements of composite
+        * are in a vector, the 2nd would be aligned
+        * properly.
+        */
+      ;
+      std::cout
+        <<"aligned size="
+        <<aligned_offset::value
+        <<"\n";
+      print_layout_all pla;
+      Composed composed;
+      pla(composed);
+    }
 };
 
   template
@@ -161,8 +189,7 @@
         typedef
       typename layout_all<Pack>::type
     layout_result;
-    print_layout_all pla;
-    pla(layout_result());
+    print_layout_all::_<layout_result>();
 }
 
 }//exit layout namespace