diff --git a/include/boost/range/as_literal.hpp b/include/boost/range/as_literal.hpp
index 2f04ca8..9ea144d 100644
--- a/include/boost/range/as_literal.hpp
+++ b/include/boost/range/as_literal.hpp
@@ -25,7 +25,7 @@
 #include <boost/detail/workaround.hpp>
 
 #include <cstring>
-#ifndef BOOST_NO_CWCHAR 
+#ifndef BOOST_NO_CWCHAR
 #include <cwchar>
 #endif
 
@@ -38,72 +38,72 @@ namespace boost
             return strlen( s );
         }
 
-#ifndef BOOST_NO_CWCHAR  
+#ifndef BOOST_NO_CWCHAR
         inline std::size_t length( const wchar_t* s )
         {
             return wcslen( s );
         }
-#endif        
+#endif
 
         //
         // Remark: the compiler cannot choose between T* and T[sz]
         // overloads, so we must put the T* internal to the
         // unconstrained version.
-        // 
+        //
 
         inline bool is_char_ptr( char* )
         {
             return true;
         }
-        
+
         inline bool is_char_ptr( const char* )
         {
             return true;
         }
 
-#ifndef BOOST_NO_CWCHAR  
+#ifndef BOOST_NO_CWCHAR
         inline bool is_char_ptr( wchar_t* )
         {
             return true;
         }
-        
+
         inline bool is_char_ptr( const wchar_t* )
         {
             return true;
         }
 #endif
-        
+
         template< class T >
-        inline long is_char_ptr( T /* r */ )
+        inline long is_char_ptr( const T& /* r */ )
         {
             return 0L;
         }
 
         template< class T >
-        inline iterator_range<T*> 
+        inline iterator_range<T*>
         make_range( T* const r, bool )
         {
             return iterator_range<T*>( r, r + length(r) );
         }
 
         template< class T >
-        inline iterator_range<BOOST_DEDUCED_TYPENAME range_iterator<T>::type> 
+        inline iterator_range<BOOST_DEDUCED_TYPENAME range_iterator<T>::type>
         make_range( T& r, long )
         {
             return boost::make_iterator_range( r );
         }
 
     }
-    
+
     template< class Range >
-    inline iterator_range<BOOST_DEDUCED_TYPENAME range_iterator<Range>::type> 
+    inline iterator_range<BOOST_DEDUCED_TYPENAME range_iterator<Range>::type>
     as_literal( Range& r )
     {
         return range_detail::make_range( r, range_detail::is_char_ptr(r) );
     }
 
     template< class Range >
-    inline iterator_range<BOOST_DEDUCED_TYPENAME range_iterator<const Range>::type> 
+    inline iterator_range<BOOST_DEDUCED_TYPENAME range_iterator<const Range>::type>
     as_literal( const Range& r )
     {
         return range_detail::make_range( r, range_detail::is_char_ptr(r) );
@@ -112,9 +112,9 @@ namespace boost
     template< class Char, std::size_t sz >
     inline iterator_range<Char*> as_literal( Char (&arr)[sz] )
     {
-        return range_detail::make_range( arr, range_detail::is_char_ptr(arr) );        
+        return range_detail::make_range( arr, range_detail::is_char_ptr(arr) );
     }
-    
+
     template< class Char, std::size_t sz >
     inline iterator_range<const Char*> as_literal( const Char (&arr)[sz] )
     {