sfinae.hpp

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// 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_SFINAE_HPP
#define BOOST_RANGE_DETAIL_SFINAE_HPP

#include <boost/range/config.hpp>
#include <boost/type_traits/is_array.hpp>
#include <boost/type_traits/detail/yes_no_type.hpp>
#include <utility>


namespace boost 
{
    namespace range_detail
    {          
        using type_traits::yes_type;
        using type_traits::no_type;

        // string
        
        yes_type is_string_impl( const char* const );
        yes_type is_string_impl( const wchar_t* const );
        no_type  is_string_impl( ... );
        
        template< std::size_t sz >
        yes_type is_char_array_impl( char BOOST_RANGE_ARRAY_REF()[sz] );
        template< std::size_t sz >
        yes_type is_char_array_impl( const char BOOST_RANGE_ARRAY_REF()[sz] );
        no_type  is_char_array_impl( ... );
        
        template< std::size_t sz >
        yes_type is_wchar_t_array_impl( wchar_t BOOST_RANGE_ARRAY_REF()[sz] );
        template< std::size_t sz >
        yes_type is_wchar_t_array_impl( const wchar_t BOOST_RANGE_ARRAY_REF()[sz] );
        no_type  is_wchar_t_array_impl( ... );
                                     
        yes_type is_char_ptr_impl( char* const );
        no_type  is_char_ptr_impl( ... );
        
        yes_type is_const_char_ptr_impl( const char* const );
        no_type  is_const_char_ptr_impl( ... );

        yes_type is_wchar_t_ptr_impl( wchar_t* const );
        no_type  is_wchar_t_ptr_impl( ... );
        
        yes_type is_const_wchar_t_ptr_impl( const wchar_t* const );
        no_type  is_const_wchar_t_ptr_impl( ... );
        
        // pair

        template< typename Iterator >
        yes_type is_pair_impl( const std::pair<Iterator,Iterator>* );
        no_type  is_pair_impl( ... );

        // tags

        struct char_or_wchar_t_array_tag {};
        
    } // namespace 'range_detail'
    
} // namespace 'boost'

#endif