text: /*==============================================================================
      Copyright (c) 2001-2010 Joel de Guzman
      Copyright (c) 2010 Thomas Heller
  
      Distributed under 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)
  ==============================================================================*/
  #ifndef BOOST_PHOENIX_STATEMENT_WHILE_HPP
  #define BOOST_PHOENIX_STATEMENT_WHILE_HPP
  
  #include <boost/phoenix/core/limits.hpp>
  #include <boost/phoenix/core/call.hpp>
  #include <boost/phoenix/core/expression.hpp>
  #include <boost/phoenix/core/meta_grammar.hpp>
  
  BOOST_PHOENIX_DEFINE_EXPRESSION(
      (boost)(phoenix)(while_)
    , (meta_grammar) // Cond
      (meta_grammar) // Do
  )
  
  namespace boost { namespace phoenix
  {
      struct while_eval
      {
          typedef void result_type;
  
          template <typename Cond, typename Do, typename Context>
          result_type
          operator()(Cond const& cond, Do const& do_it, Context const & ctx) const
          {
              while(boost::phoenix::eval(cond, ctx))
              {
                  boost::phoenix::eval(do_it, ctx);
              }
          }
      };
  
      template <typename Dummy>
      struct default_actions::when<rule::while_, Dummy>
          : call<while_eval, Dummy>
      {};
  
      template <typename Cond>
      struct while_gen
      {
          while_gen(Cond const& cond_) : cond(cond_) {}
  
          template <typename Do>
          typename expression::while_<Cond, Do>::type const
          operator[](Do const& do_it) const
          {
              return expression::while_<Cond, Do>::make(cond, do_it);
          }
  
          Cond const& cond;
      };
  
      template <typename Cond>
      inline
      while_gen<Cond> const
      while_(Cond const& cond)
      {
          return while_gen<Cond>(cond);
      }
  
  
  }}
  
  #endif
  