1// Copyright (c) 2001-2011 Hartmut Kaiser
2//
3// Distributed under the Boost Software License, Version 1.0. (See accompanying
4// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
5
6#ifndef BOOST_SPIRIT_SUPPORT_AUXILIARY_ATTR_CAST_HPP
7#define BOOST_SPIRIT_SUPPORT_AUXILIARY_ATTR_CAST_HPP
8
9#if defined(_MSC_VER)
10#pragma once
11#endif
12
13#include <boost/spirit/home/support/common_terminals.hpp>
14#include <boost/spirit/home/support/attributes.hpp>
15#include <boost/core/enable_if.hpp>
16#include <boost/proto/traits.hpp>
17
18namespace boost { namespace spirit
19{
20 ///////////////////////////////////////////////////////////////////////////
21 // This one is the function that the user can call directly in order
22 // to create a customized attr_cast component
23 template <typename Expr>
24 typename enable_if<proto::is_expr<Expr>
25 , stateful_tag_type<Expr, tag::attr_cast> >::type
26 attr_cast(Expr const& expr)
27 {
28 return stateful_tag_type<Expr, tag::attr_cast>(expr);
29 }
30
31 template <typename Exposed, typename Expr>
32 typename enable_if<proto::is_expr<Expr>
33 , stateful_tag_type<Expr, tag::attr_cast, Exposed> >::type
34 attr_cast(Expr const& expr)
35 {
36 return stateful_tag_type<Expr, tag::attr_cast, Exposed>(expr);
37 }
38
39 template <typename Exposed, typename Transformed, typename Expr>
40 typename enable_if<proto::is_expr<Expr>
41 , stateful_tag_type<Expr, tag::attr_cast, Exposed, Transformed> >::type
42 attr_cast(Expr const& expr)
43 {
44 return stateful_tag_type<Expr, tag::attr_cast, Exposed, Transformed>(expr);
45 }
46}}
47
48#endif
49

source code of boost/libs/spirit/include/boost/spirit/home/support/auxiliary/attr_cast.hpp