| // Copyright (c) 2001-2010 Hartmut Kaiser |
| // |
| // 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(SPIRIT_SUPPORT_ATTR_CAST_OCT_06_2009_00535PM) |
| #define SPIRIT_SUPPORT_ATTR_CAST_OCT_06_2009_00535PM |
| |
| #if defined(_MSC_VER) |
| #pragma once |
| #endif |
| |
| #include <boost/spirit/home/support/common_terminals.hpp> |
| #include <boost/spirit/home/support/attributes.hpp> |
| #include <boost/utility/enable_if.hpp> |
| |
| namespace boost { namespace spirit |
| { |
| /////////////////////////////////////////////////////////////////////////// |
| // This one is the function that the user can call directly in order |
| // to create a customized attr_cast component |
| template <typename Expr> |
| typename enable_if<proto::is_expr<Expr> |
| , stateful_tag_type<Expr, tag::attr_cast> >::type |
| attr_cast(Expr const& expr) |
| { |
| return stateful_tag_type<Expr, tag::attr_cast>(expr); |
| } |
| |
| template <typename Exposed, typename Expr> |
| typename enable_if<proto::is_expr<Expr> |
| , stateful_tag_type<Expr, tag::attr_cast, Exposed> >::type |
| attr_cast(Expr const& expr) |
| { |
| return stateful_tag_type<Expr, tag::attr_cast, Exposed>(expr); |
| } |
| |
| template <typename Exposed, typename Transformed, typename Expr> |
| typename enable_if<proto::is_expr<Expr> |
| , stateful_tag_type<Expr, tag::attr_cast, Exposed, Transformed> >::type |
| attr_cast(Expr const& expr) |
| { |
| return stateful_tag_type<Expr, tag::attr_cast, Exposed, Transformed>(expr); |
| } |
| }} |
| |
| #endif |