/Src/Dependencies/Boost/boost/spirit/home/karma/detail/as.hpp
http://hadesmem.googlecode.com/ · C++ Header · 74 lines · 49 code · 12 blank · 13 comment · 0 complexity · 401f96ac24ccc60e1cc579ea11562cca MD5 · raw file
- // Copyright (c) 2001-2011 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(BOOST_SPIRIT_KARMA_AS_STRING_DEC_18_0644PM)
- #define BOOST_SPIRIT_KARMA_AS_STRING_DEC_18_0644PM
- #if defined(_MSC_VER)
- #pragma once
- #endif
- #include <boost/spirit/home/support/unused.hpp>
- #include <boost/spirit/home/support/attributes_fwd.hpp>
- ///////////////////////////////////////////////////////////////////////////////
- namespace boost { namespace spirit { namespace traits
- {
- ///////////////////////////////////////////////////////////////////////////
- // This file contains the attribute to string conversion utility. The
- // utility provided also accept spirit's unused_type; all no-ops. Compiler
- // optimization will easily strip these away.
- ///////////////////////////////////////////////////////////////////////////
- ///////////////////////////////////////////////////////////////////////////
- template <typename T, typename Attribute>
- inline typename spirit::result_of::attribute_as<T, Attribute>::type
- as(Attribute const& attr)
- {
- return attribute_as<T, Attribute>::call(attr);
- }
- template <typename T>
- inline unused_type as(unused_type)
- {
- return unused;
- }
-
- ///////////////////////////////////////////////////////////////////////////
- template <typename T, typename Attribute>
- inline bool valid_as(Attribute const& attr)
- {
- return attribute_as<T, Attribute>::is_valid(attr);
- }
- template <typename T>
- inline bool valid_as(unused_type)
- {
- return true;
- }
- }}}
- ///////////////////////////////////////////////////////////////////////////////
- namespace boost { namespace spirit { namespace result_of
- {
- template <typename T, typename Attribute>
- struct attribute_as
- : traits::attribute_as<T, Attribute>
- {};
- template <typename T>
- struct attribute_as<T, unused_type>
- {
- typedef unused_type type;
- };
- template <typename T>
- struct attribute_as<T, unused_type const>
- {
- typedef unused_type type;
- };
- }}}
- #endif