*** empty log message ***

[SVN r23240]
2004-06-29 02:50:07 +00:00
commit 6a455033ee
35 changed files with 3239 additions and 0 deletions
--- a/include/boost/range/detail/empty.hpp
+++ b/include/boost/range/detail/empty.hpp
@ -0,0 +1,120 @@
+// Boost.Range library
+//
+//  Copyright Thorsten Ottosen 2003-2004. Use, modification and
+//  distribution is subject to the Boost Software License, Version
+//  1.0. (See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+// For more information, see http://www.boost.org/libs/range/
+//
+
+#ifndef BOOST_RANGE_DETAIL_EMPTY_HPP
+#define BOOST_RANGE_DETAIL_EMPTY_HPP
+
+#include <boost/range/detail/common.hpp>
+
+namespace boost 
+{
+    namespace range_detail
+    {
+        template< typename T >
+        struct collection_empty;
+
+        //////////////////////////////////////////////////////////////////////
+        // default
+        //////////////////////////////////////////////////////////////////////
+        
+        template<>
+        struct collection_empty<std_container_>
+        {
+            template< typename C >
+            static bool fun( C& c )
+            {
+                return c.empty();
+            };
+        };
+                    
+        //////////////////////////////////////////////////////////////////////
+        // pair
+        //////////////////////////////////////////////////////////////////////
+        
+        template<>
+        struct collection_empty<std_pair_>
+        {
+            template< typename P >
+            static bool fun( const P& p )
+            {
+                return p.first == p.second;
+            }
+        };
+ 
+        //////////////////////////////////////////////////////////////////////
+        // array
+        //////////////////////////////////////////////////////////////////////
+        
+        template<>
+        struct collection_empty<array_>
+        {
+            template< typename T, std::size_t sz >
+            static bool fun( T BOOST_ARRAY_REF[sz] )
+            {
+                if( array == 0 )
+                    return true;
+                return false;
+            }
+        };
+
+        //////////////////////////////////////////////////////////////////////
+        // string
+        //////////////////////////////////////////////////////////////////////
+        
+        template<>
+        struct collection_empty<char_ptr_>
+        {
+            static bool fun( const char* s )
+            {
+                return s == 0 || s[0] == 0;
+            }
+        };
+
+        template<>
+        struct collection_empty<const_char_ptr_>
+        {
+            static bool fun( const char* s )
+            {
+                return  s == 0 || s[0] == 0;
+            }
+        };
+
+        template<>
+        struct collection_empty<wchar_t_ptr_>
+        {
+            static bool fun( const wchar_t* s )
+            {
+                return  s == 0 || s[0] == 0;
+            }
+        };
+        
+        template<>
+        struct collection_empty<const_wchar_t_ptr_>
+        {
+            static bool fun( const wchar_t* s )
+            {
+                return  s == 0 || s[0] == 0;
+            }
+        };
+
+    } // namespace 'range_detail'
+    
+        
+    template< typename C >
+    inline bool 
+    empty( const C& c )
+    {
+        return range_detail::collection_empty<  BOOST_CT_DEDUCED_TYPENAME range_detail::collection<C>::type >::fun( c );
+    }
+
+} // namespace 'boost'
+
+
+#endif