/*============================================================================= | |
Copyright (c) 2001-2011 Joel de Guzman | |
Copyright (c) 2001-2011 Hartmut Kaiser | |
Copyright (c) 2009 Francois Barel | |
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) | |
==============================================================================*/ | |
#if !defined(BOOST_SPIRIT_EXTRACT_PARAM_AUGUST_08_2009_0848AM) | |
#define BOOST_SPIRIT_EXTRACT_PARAM_AUGUST_08_2009_0848AM | |
#if defined(_MSC_VER) | |
#pragma once | |
#endif | |
#include <boost/spirit/home/support/meta_compiler.hpp> | |
#include <boost/spirit/home/support/nonterminal/locals.hpp> | |
#include <boost/spirit/home/support/unused.hpp> | |
#include <boost/spirit/home/support/common_terminals.hpp> | |
#include <boost/function_types/is_function.hpp> | |
#include <boost/function_types/parameter_types.hpp> | |
#include <boost/function_types/result_type.hpp> | |
#include <boost/fusion/include/as_list.hpp> | |
#include <boost/fusion/include/as_vector.hpp> | |
#include <boost/mpl/deref.hpp> | |
#include <boost/mpl/end.hpp> | |
#include <boost/mpl/eval_if.hpp> | |
#include <boost/mpl/find_if.hpp> | |
#include <boost/mpl/identity.hpp> | |
#include <boost/mpl/if.hpp> | |
#include <boost/mpl/placeholders.hpp> | |
#include <boost/type_traits/is_same.hpp> | |
namespace boost { namespace spirit { namespace detail | |
{ | |
/////////////////////////////////////////////////////////////////////////// | |
// Helpers to extract params (locals, attributes, ...) from nonterminal | |
// template arguments | |
/////////////////////////////////////////////////////////////////////////// | |
template <typename Types, typename Pred, typename Default> | |
struct extract_param | |
{ | |
typedef typename mpl::find_if<Types, Pred>::type pos; | |
typedef typename | |
mpl::eval_if< | |
is_same<pos, typename mpl::end<Types>::type> | |
, mpl::identity<Default> | |
, mpl::deref<pos> | |
>::type | |
type; | |
}; | |
/////////////////////////////////////////////////////////////////////////// | |
template <typename Types> | |
struct extract_locals | |
: fusion::result_of::as_vector< | |
typename extract_param< | |
Types | |
, is_locals<mpl::_> | |
, locals<> | |
>::type | |
> | |
{}; | |
/////////////////////////////////////////////////////////////////////////// | |
template <typename Domain, typename Types> | |
struct extract_component | |
: spirit::result_of::compile< | |
Domain | |
, typename extract_param< | |
Types | |
, traits::matches<Domain, mpl::_> | |
, unused_type | |
>::type | |
> | |
{}; | |
/////////////////////////////////////////////////////////////////////////// | |
template <typename Types> | |
struct extract_sig | |
: extract_param< | |
Types | |
, function_types::is_function<mpl::_> | |
, void() | |
> | |
{}; | |
template <typename Sig> | |
struct attr_from_sig | |
{ | |
typedef typename function_types::result_type<Sig>::type attr; | |
typedef typename | |
mpl::if_< | |
is_same<attr, void> | |
, unused_type | |
, attr | |
>::type | |
type; | |
}; | |
template <typename Sig> | |
struct params_from_sig | |
{ | |
typedef typename function_types::parameter_types<Sig>::type params; | |
typedef typename fusion::result_of::as_list<params>::type type; | |
}; | |
/////////////////////////////////////////////////////////////////////////// | |
template <typename Types> | |
struct extract_encoding | |
: extract_param< | |
Types | |
, is_char_encoding<mpl::_> | |
, unused_type | |
> | |
{}; | |
}}} | |
#endif |