Chris@16: /*=============================================================================
Chris@16:     Copyright (c) 2001-2007 Joel de Guzman
Chris@16:     Copyright (c) 2004 Daniel Wallin
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: #ifndef PHOENIX_SCOPE_LOCAL_VARIABLE_HPP
Chris@16: #define PHOENIX_SCOPE_LOCAL_VARIABLE_HPP
Chris@16: 
Chris@16: #include <boost/spirit/home/phoenix/core/limits.hpp>
Chris@16: #include <boost/spirit/home/phoenix/detail/local_reference.hpp>
Chris@16: #include <boost/spirit/home/phoenix/scope/detail/local_variable.hpp>
Chris@16: #include <boost/spirit/home/phoenix/core/actor.hpp>
Chris@16: #include <boost/mpl/bool.hpp>
Chris@16: 
Chris@16: namespace boost { namespace phoenix
Chris@16: {
Chris@16:     template <typename Key>
Chris@16:     struct local_variable
Chris@16:     {
Chris@16:         typedef Key key_type;
Chris@16: 
Chris@16:         // This will prevent actor::operator()() from kicking in.
Chris@16:         // Actually, we do not need all actor::operator()s for
Chris@16:         // all arities, but this will suffice. The nullary 
Chris@16:         // actor::operator() is particularly troublesome because 
Chris@16:         // it is always eagerly evaluated by the compiler.
Chris@16:         typedef mpl::true_ no_nullary; 
Chris@16: 
Chris@16:         template <typename Env>
Chris@16:         struct result : detail::apply_local<local_variable<Key>, Env> {};
Chris@16: 
Chris@16:         template <typename Env>
Chris@16:         typename result<Env>::type 
Chris@16:         eval(Env const& env) const
Chris@16:         {
Chris@16:             typedef typename result<Env>::type return_type;
Chris@16:             typedef typename 
Chris@16:                 detail::get_index<typename Env::map_type, Key>::type 
Chris@16:             index_type;
Chris@16:             typedef detail::eval_local<Key> eval_local;
Chris@16: 
Chris@16:             return eval_local::template get<return_type>(
Chris@16:                 env
Chris@16:               , index_type());
Chris@16:         }
Chris@16: 
Chris@16:     private:
Chris@16:         // silence MSVC warning C4512: assignment operator could not be generated
Chris@16:         local_variable& operator= (local_variable const&);
Chris@16:     };
Chris@16: 
Chris@16:     namespace local_names
Chris@16:     {
Chris@16:         actor<local_variable<struct _a_key> > const _a 
Chris@16:             = local_variable<struct _a_key>();
Chris@16:         actor<local_variable<struct _b_key> > const _b 
Chris@16:             = local_variable<struct _b_key>();
Chris@16:         actor<local_variable<struct _c_key> > const _c 
Chris@16:             = local_variable<struct _c_key>();
Chris@16:         actor<local_variable<struct _d_key> > const _d 
Chris@16:             = local_variable<struct _d_key>();
Chris@16:         actor<local_variable<struct _e_key> > const _e 
Chris@16:             = local_variable<struct _e_key>();
Chris@16:         actor<local_variable<struct _f_key> > const _f 
Chris@16:             = local_variable<struct _f_key>();
Chris@16:         actor<local_variable<struct _g_key> > const _g 
Chris@16:             = local_variable<struct _g_key>();
Chris@16:         actor<local_variable<struct _h_key> > const _h 
Chris@16:             = local_variable<struct _h_key>();
Chris@16:         actor<local_variable<struct _i_key> > const _i 
Chris@16:             = local_variable<struct _i_key>();
Chris@16:         actor<local_variable<struct _j_key> > const _j 
Chris@16:             = local_variable<struct _j_key>();
Chris@16:         actor<local_variable<struct _k_key> > const _k 
Chris@16:             = local_variable<struct _k_key>();
Chris@16:         actor<local_variable<struct _l_key> > const _l 
Chris@16:             = local_variable<struct _l_key>();
Chris@16:         actor<local_variable<struct _m_key> > const _m 
Chris@16:             = local_variable<struct _m_key>();
Chris@16:         actor<local_variable<struct _n_key> > const _n 
Chris@16:             = local_variable<struct _n_key>();
Chris@16:         actor<local_variable<struct _o_key> > const _o 
Chris@16:             = local_variable<struct _o_key>();
Chris@16:         actor<local_variable<struct _p_key> > const _p 
Chris@16:             = local_variable<struct _p_key>();
Chris@16:         actor<local_variable<struct _q_key> > const _q 
Chris@16:             = local_variable<struct _q_key>();
Chris@16:         actor<local_variable<struct _r_key> > const _r 
Chris@16:             = local_variable<struct _r_key>();
Chris@16:         actor<local_variable<struct _s_key> > const _s 
Chris@16:             = local_variable<struct _s_key>();
Chris@16:         actor<local_variable<struct _t_key> > const _t 
Chris@16:             = local_variable<struct _t_key>();
Chris@16:         actor<local_variable<struct _u_key> > const _u 
Chris@16:             = local_variable<struct _u_key>();
Chris@16:         actor<local_variable<struct _v_key> > const _v 
Chris@16:             = local_variable<struct _v_key>();
Chris@16:         actor<local_variable<struct _w_key> > const _w 
Chris@16:             = local_variable<struct _w_key>();
Chris@16:         actor<local_variable<struct _x_key> > const _x 
Chris@16:             = local_variable<struct _x_key>();
Chris@16:         actor<local_variable<struct _y_key> > const _y 
Chris@16:             = local_variable<struct _y_key>();
Chris@16:         actor<local_variable<struct _z_key> > const _z 
Chris@16:             = local_variable<struct _z_key>();
Chris@16:     }
Chris@16: }}
Chris@16: 
Chris@16: #endif