Chris@16: //  boost/chrono/utility/manip_base.hpp  ------------------------------------------------------------//
Chris@16: 
Chris@16: //  Copyright 2011 Vicente J. Botet Escriba
Chris@16: 
Chris@16: //  Distributed under the Boost Software License, Version 1.0. (See accompanying
Chris@16: //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: 
Chris@16: //  See http://www.boost.org/libs/chrono for documentation.
Chris@16: 
Chris@16: #ifndef BOOST_CHRONO_UTILITY_MANIP_BASE_PTR_HPP
Chris@16: #define BOOST_CHRONO_UTILITY_MANIP_BASE_PTR_HPP
Chris@16: 
Chris@16: #include <ios>
Chris@16: 
Chris@16: /**
Chris@16:  *
Chris@16: 
Chris@16:  */
Chris@16: 
Chris@16: namespace boost
Chris@16: {
Chris@16:   namespace chrono
Chris@16:   {
Chris@16: 
Chris@16:     /**
Chris@16:      * manip is a manipulator mixin class following the CRTP.
Chris@16:      * @tparam Final the derived from manip and final type
Chris@16:      *
Chris@16:      * @Example
Chris@16:      * @code
Chris@16: 
Chris@16:     class mendl: public manip<mendl>
Chris@16:     {
Chris@16:     public:
Chris@16:       explicit mendl(size_t how_many) :
Chris@16:         count(how_many) {}
Chris@16:       template <typename out_stream>
Chris@16:       void operator()(out_stream &out) const
Chris@16:       {
Chris@16:         for (size_t line = 0; line < count; ++line)
Chris@16:         {
Chris@16:           out.put(out.widen('\n'));
Chris@16:         }
Chris@16:         out.flush();
Chris@16:       }
Chris@16:     private:
Chris@16:       size_t count;
Chris@16:     };
Chris@16: 
Chris@16:      * @codeend
Chris@16:      */
Chris@16:     template <typename Final>
Chris@16:     class manip
Chris@16:     {
Chris@16:     public:
Chris@16:       /**
Chris@16:        *
Chris@16:        * @param ios the io stream or ios_base.
Chris@16:        * @Effects calls to the manipulator final functor.
Chris@16:        */
Chris@16:       //template <typename out_stream>
Chris@16:       void operator()(std::ios_base &ios) const
Chris@16:       {
Chris@16:         (*static_cast<const Final *> (this))(ios);
Chris@16:       }
Chris@16:     };
Chris@16: 
Chris@16:     /**
Chris@16:      * @c manip stream inserter
Chris@16:      * @param out the io stream or ios_base.
Chris@16:      * @param op the manipulator instance.
Chris@16:      * @Effects if @c out is good calls to the manipulator functor @op.
Chris@16:      * @return @c out
Chris@16:      */
Chris@16:     template <typename out_stream, typename manip_type>
Chris@16:     out_stream &operator<<(out_stream &out, const manip<manip_type> &op)
Chris@16:     {
Chris@16:       if (out.good())
Chris@16:         op(out);
Chris@16:       return out;
Chris@16:     }
Chris@16: 
Chris@16:     /**
Chris@16:      * @c manip stream extractor
Chris@16:      * @param in the io stream or ios_base.
Chris@16:      * @param op  the manipulator instance.
Chris@16:      * @Effects if @c in is good calls to the manipulator functor @op.
Chris@16:      * @return @c in
Chris@16:      */
Chris@16:     template <typename in_stream, typename manip_type>
Chris@16:     in_stream &operator>>(in_stream &in, const manip<manip_type> &op)
Chris@16:     {
Chris@16:       if (in.good())
Chris@16:         op(in);
Chris@16:       return in;
Chris@16:     }
Chris@16: 
Chris@16:   } // namespace chrono
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif // header