[Boost-commit] svn:boost r64467 - sandbox/variadic_templates/boost/mpl

Subject: [Boost-commit] svn:boost r64467 - sandbox/variadic_templates/boost/mpl
From: cppljevans_at_[hidden]
Date: 2010-07-30 11:06:21

Author: cppljevans
Date: 2010-07-30 11:06:20 EDT (Fri, 30 Jul 2010)
New Revision: 64467
URL: http://svn.boost.org/trac/boost/changeset/64467

Log:
repeat.hpp and templates to help it
Added:
   sandbox/variadic_templates/boost/mpl/at_c_always.hpp   (contents, props changed)
   sandbox/variadic_templates/boost/mpl/at_c_indices.hpp   (contents, props changed)
   sandbox/variadic_templates/boost/mpl/repeat.hpp   (contents, props changed)

Added: sandbox/variadic_templates/boost/mpl/at_c_always.hpp
==============================================================================
--- (empty file)
+++ sandbox/variadic_templates/boost/mpl/at_c_always.hpp	2010-07-30 11:06:20 EDT (Fri, 30 Jul 2010)
@@ -0,0 +1,20 @@
+#ifndef BOOST_MPL_AT_C_ALWAYS_HPP_INCLUDED
+#define BOOST_MPL_AT_C_ALWAYS_HPP_INCLUDED
+namespace boost { namespace mpl {
+
+template<typename Type>
+struct at_c_always
+{
+      template
+      < typename Index
+      , Index I
+      >
+    struct at_c
+    {
+        typedef Type type;
+    };
+};
+    
+}}
+
+#endif // BOOST_MPL_AT_C_ALWAYS_HPP_INCLUDED

Added: sandbox/variadic_templates/boost/mpl/at_c_indices.hpp
==============================================================================
--- (empty file)
+++ sandbox/variadic_templates/boost/mpl/at_c_indices.hpp	2010-07-30 11:06:20 EDT (Fri, 30 Jul 2010)
@@ -0,0 +1,33 @@
+#ifndef BOOST_MPL_AT_C_INDICES_HPP_INCLUDED
+#define BOOST_MPL_AT_C_INDICES_HPP_INCLUDED
+#include <boost/mpl/package_c.hpp>
+namespace boost
+{
+  namespace mpl
+  {
+      template 
+      < template<typename IndexOp, IndexOp I>class Op
+      , typename Indices=package_c<unsigned>
+      , template<typename...>class Seq=package
+      > 
+    struct at_c_indices
+    ;
+      template 
+      < typename Index
+      , Index... Indices
+      , template<typename IndexOp, IndexOp I>class Op
+      , template<typename...>class Seq
+      > 
+    struct at_c_indices
+      < Op
+      , package_c<Index, Indices...>
+      , Seq
+      >
+    {
+        typedef Seq<typename Op<Index,Indices>::type...> type;
+    };
+    
+  }//exit mpl namespace
+}//exit boost namespace  
+
+#endif

Added: sandbox/variadic_templates/boost/mpl/repeat.hpp
==============================================================================
--- (empty file)
+++ sandbox/variadic_templates/boost/mpl/repeat.hpp	2010-07-30 11:06:20 EDT (Fri, 30 Jul 2010)
@@ -0,0 +1,25 @@
+//package with repeated elements.
+#ifndef BOOST_MPL_PACKAGE_REPEAT_HPP_INCLUDED
+#define BOOST_MPL_PACKAGE_REPEAT_HPP_INCLUDED
+#include <boost/mpl/at_c_always.hpp>
+#include <boost/mpl/at_c_indices.hpp>
+#include <boost/mpl/package_range_c.hpp>
+namespace boost { namespace mpl {
+  template
+  < typename Element
+  , unsigned Size=0
+  >
+struct repeat
+{
+        typedef
+        typename
+      at_c_indices
+      < at_c_always<Element>::template at_c
+      , typename package_range_c<unsigned,0,Size>::type
+      >::type
+    type
+    ;
+};
+  
+}}
+#endif