boost/phoenix/scope/local_variable.hpp
/*==============================================================================
Copyright (c) 2005-2010 Joel de Guzman
Copyright (c) 2010-2011 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_SCOPE_LOCAL_VARIABLE_HPP
#define BOOST_PHOENIX_SCOPE_LOCAL_VARIABLE_HPP
#include <boost/phoenix/core/limits.hpp>
#include <boost/phoenix/core/call.hpp>
#include <boost/phoenix/core/expression.hpp>
#include <boost/phoenix/core/reference.hpp>
#include <boost/phoenix/core/value.hpp>
#include <boost/phoenix/scope/scoped_environment.hpp>
#include <boost/phoenix/scope/detail/local_variable.hpp>
#include <boost/phoenix/statement/sequence.hpp>
namespace boost { namespace phoenix
{
namespace detail
{
}
namespace expression
{
template <typename Key>
struct local_variable
: expression::terminal<detail::local<Key> >
{
typedef typename expression::terminal<detail::local<Key> >::type type;
static type make()
{
type const e = {};
return e;
}
};
}
namespace rule
{
struct local_variable
: expression::local_variable<proto::_>
{};
struct local_var_def
: proto::assign<local_variable, meta_grammar>
{};
}
namespace result_of
{
template <typename Key>
struct is_nullary<custom_terminal<detail::local<Key> > >
: mpl::false_
{};
}
namespace detail
{
struct scope_is_nullary_actions
{
template <typename Rule, typename Dummy = void>
struct when
: boost::phoenix::is_nullary::when<Rule, Dummy>
{};
};
template <typename Dummy>
struct scope_is_nullary_actions::when<boost::phoenix::rule::custom_terminal, Dummy>
: proto::or_<
proto::when<boost::phoenix::rule::local_variable, mpl::true_()>
, proto::otherwise<
is_nullary::when<boost::phoenix::rule::custom_terminal, Dummy>
>
>
{};
struct local_var_not_found
{
};
}
template<typename Key>
struct is_custom_terminal<detail::local<Key> >
: mpl::true_
{};
template <typename Key>
struct custom_terminal<detail::local<Key> >
{
template <typename Sig>
struct result;
template <typename This, typename Local, typename Context>
struct result<This(Local, Context)>
: result<This(Local const &, Context)>
{};
template <typename This, typename Local, typename Context>
struct result<This(Local &, Context)>
{
typedef
typename remove_reference<
typename result_of::env<Context>::type
>::type
env_type;
typedef typename detail::apply_local<detail::local<Key>, env_type>::type type;
};
template <typename Local, typename Context>
typename result<custom_terminal(Local const &, Context const&)>::type
operator()(Local, Context const & ctx)
{
typedef
typename remove_reference<
typename result_of::env<Context>::type
>::type
env_type;
typedef typename detail::apply_local<detail::local<Key>, env_type>::type return_type;
static const int index_value = detail::get_index<typename env_type::map_type, detail::local<Key> >::value;
typedef detail::eval_local<Key> eval_local;
// Detect if the return_type is for a value.
//typedef typename is_value<return_type>::type is_value_type;
return eval_local::template get<return_type, index_value>(
phoenix::env(ctx));
}
};
namespace local_names
{
typedef expression::local_variable<struct _a_key>::type _a_type;
typedef expression::local_variable<struct _b_key>::type _b_type;
typedef expression::local_variable<struct _c_key>::type _c_type;
typedef expression::local_variable<struct _d_key>::type _d_type;
typedef expression::local_variable<struct _e_key>::type _e_type;
typedef expression::local_variable<struct _f_key>::type _f_type;
typedef expression::local_variable<struct _g_key>::type _g_type;
typedef expression::local_variable<struct _h_key>::type _h_type;
typedef expression::local_variable<struct _i_key>::type _i_type;
typedef expression::local_variable<struct _j_key>::type _j_type;
typedef expression::local_variable<struct _k_key>::type _k_type;
typedef expression::local_variable<struct _l_key>::type _l_type;
typedef expression::local_variable<struct _m_key>::type _m_type;
typedef expression::local_variable<struct _n_key>::type _n_type;
typedef expression::local_variable<struct _o_key>::type _o_type;
typedef expression::local_variable<struct _p_key>::type _p_type;
typedef expression::local_variable<struct _q_key>::type _q_type;
typedef expression::local_variable<struct _r_key>::type _r_type;
typedef expression::local_variable<struct _s_key>::type _s_type;
typedef expression::local_variable<struct _t_key>::type _t_type;
typedef expression::local_variable<struct _u_key>::type _u_type;
typedef expression::local_variable<struct _v_key>::type _v_type;
typedef expression::local_variable<struct _w_key>::type _w_type;
typedef expression::local_variable<struct _x_key>::type _x_type;
typedef expression::local_variable<struct _y_key>::type _y_type;
typedef expression::local_variable<struct _z_key>::type _z_type;
#ifndef BOOST_PHOENIX_NO_PREDEFINED_TERMINALS
_a_type const _a = {{{}}};
_b_type const _b = {{{}}};
_c_type const _c = {{{}}};
_d_type const _d = {{{}}};
_e_type const _e = {{{}}};
_f_type const _f = {{{}}};
_g_type const _g = {{{}}};
_h_type const _h = {{{}}};
_i_type const _i = {{{}}};
_j_type const _j = {{{}}};
_k_type const _k = {{{}}};
_l_type const _l = {{{}}};
_m_type const _m = {{{}}};
_n_type const _n = {{{}}};
_o_type const _o = {{{}}};
_p_type const _p = {{{}}};
_q_type const _q = {{{}}};
_r_type const _r = {{{}}};
_s_type const _s = {{{}}};
_t_type const _t = {{{}}};
_u_type const _u = {{{}}};
_v_type const _v = {{{}}};
_w_type const _w = {{{}}};
_x_type const _x = {{{}}};
_y_type const _y = {{{}}};
_z_type const _z = {{{}}};
#endif
}
}}
#endif
