| // Copyright (c) 2001-2009 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_FUNCTOR_DIRECTOR_APR_01_2007_1041AM) |
| #define BOOST_SPIRIT_KARMA_FUNCTOR_DIRECTOR_APR_01_2007_1041AM |
| |
| #include <boost/spirit/home/support/auxiliary/functor_holder.hpp> |
| #include <boost/spirit/home/support/component.hpp> |
| #include <boost/spirit/home/karma/domain.hpp> |
| |
| namespace boost { namespace spirit { namespace karma |
| { |
| // this is the director for all functor generators |
| struct functor_director |
| { |
| // expected value type of the generator |
| template <typename Component, typename Context, typename Unused> |
| struct attribute |
| { |
| typedef typename |
| result_of::subject<Component>::type::functor_holder |
| functor_holder; |
| typedef typename functor_holder::functor_type functor_type; |
| |
| typedef typename |
| functor_type::template result<Context>::type |
| type; |
| }; |
| |
| // generate functionality, delegates back to the corresponding functor |
| template <typename Component, typename OutputIterator, |
| typename Context, typename Delimiter, typename Parameter> |
| static bool |
| generate(Component const& component, OutputIterator& sink, |
| Context& ctx, Delimiter const& d, Parameter const& param) |
| { |
| bool result = subject(component).held->generate(sink, ctx, param); |
| karma::delimit(sink, d); // always do post-delimiting |
| return result; |
| } |
| |
| template <typename Component, typename Context> |
| static std::string what(Component const& component, Context const& ctx) |
| { |
| return "functor"; |
| } |
| }; |
| |
| }}} |
| |
| #endif |