range/adaptor/argument_fwd.hpp

0001 // Boost.Range library
0002 //
0003 //  Copyright Thorsten Ottosen, Neil Groves 2006 - 2008. Use, modification and
0004 //  distribution is subject to the Boost Software License, Version
0005 //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
0006 //  http://www.boost.org/LICENSE_1_0.txt)
0007 //
0008 // For more information, see http://www.boost.org/libs/range/
0009 //
0010
0011 #ifndef BOOST_RANGE_ADAPTOR_ARGUMENT_FWD_HPP
0012 #define BOOST_RANGE_ADAPTOR_ARGUMENT_FWD_HPP
0013
0014 #include <boost/config.hpp>
0015
0016 #ifdef BOOST_MSVC
0017 #pragma warning(push)
0018 #pragma warning(disable : 4512) // assignment operator could not be generated
0019 #endif
0020
0021 namespace boost
0022 {
0023     namespace range_detail
0024     {
0025         template< class T >
0026         struct holder
0027         {
0028             T val;
0029             holder( T t ) : val(t)
0030             { }
0031         };
0032
0033         template< class T >
0034         struct holder2
0035         {
0036             T val1, val2;
0037             holder2( T t, T u ) : val1(t), val2(u)
0038             { }
0039         };
0040
0041         template< template<class> class Holder >
0042         struct forwarder
0043         {
0044             template< class T >
0045             Holder<T> operator()( T t ) const
0046             {
0047                 return Holder<T>(t);
0048             }
0049         };
0050
0051         template< template<class> class Holder >
0052         struct forwarder2
0053         {
0054             template< class T >
0055             Holder<T> operator()( T t, T u ) const
0056             {
0057                 return Holder<T>(t,u);
0058             }
0059         };
0060
0061         template< template<class,class> class Holder >
0062         struct forwarder2TU
0063         {
0064             template< class T, class U >
0065             Holder<T, U> operator()( T t, U u ) const
0066             {
0067                 return Holder<T, U>(t, u);
0068             }
0069         };
0070
0071
0072     }
0073
0074 }
0075
0076 #ifdef BOOST_MSVC
0077 #pragma warning(pop)
0078 #endif
0079
0080 #endif