comparison DEPENDENCIES/generic/include/boost/spirit/home/karma/directive/duplicate.hpp @ 16:2665513ce2d3

Add boost headers

+//  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(SPIRIT_KARMA_DUPLICATE_JUL_11_2010_0954AM)
+#define SPIRIT_KARMA_DUPLICATE_JUL_11_2010_0954AM
+
+#if defined(_MSC_VER)
+#pragma once
+#endif
+
+#include <boost/spirit/home/karma/meta_compiler.hpp>
+#include <boost/spirit/home/karma/generator.hpp>
+#include <boost/spirit/home/karma/domain.hpp>
+#include <boost/spirit/home/karma/detail/attributes.hpp>
+#include <boost/spirit/home/support/unused.hpp>
+#include <boost/spirit/home/support/info.hpp>
+#include <boost/spirit/home/support/common_terminals.hpp>
+#include <boost/spirit/home/support/assert_msg.hpp>
+#include <boost/spirit/home/support/has_semantic_action.hpp>
+#include <boost/spirit/home/support/handles_container.hpp>
+#include <boost/fusion/include/cons.hpp>
+#include <boost/fusion/include/make_cons.hpp>
+#include <boost/fusion/include/vector.hpp>
+#include <boost/fusion/include/at_c.hpp>
+#include <boost/mpl/identity.hpp>
+#include <boost/mpl/bool.hpp>
+
+namespace boost { namespace spirit
+{
+    ///////////////////////////////////////////////////////////////////////////
+    // Enablers
+    ///////////////////////////////////////////////////////////////////////////
+    template <>
+    struct use_directive<karma::domain, tag::duplicate> // enables duplicate
+      : mpl::true_ {};
+}}
+
+namespace boost { namespace spirit { namespace karma
+{
+#ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
+    using spirit::duplicate;
+#endif
+    using spirit::duplicate_type;
+
+    ///////////////////////////////////////////////////////////////////////////
+    namespace detail
+    {
+        ///////////////////////////////////////////////////////////////////////
+        template <typename T
+          , bool IsSequence = fusion::traits::is_sequence<T>::value>
+        struct attribute_count
+          : fusion::result_of::size<T>
+        {};
+
+        template <>
+        struct attribute_count<unused_type, false>
+          : mpl::int_<0>
+        {};
+
+        template <typename T>
+        struct attribute_count<T, false>
+          : mpl::int_<1>
+        {};
+
+        ///////////////////////////////////////////////////////////////////////
+        template <typename T
+          , bool IsSequence = fusion::traits::is_sequence<T>::value>
+        struct first_attribute_of_subject
+          : fusion::result_of::at_c<T, 0>
+        {};
+
+        template <typename T>
+        struct first_attribute_of_subject<T, false>
+          : mpl::identity<T>
+        {};
+
+        template <typename T, typename Context, typename Iterator>
+        struct first_attribute_of
+          : first_attribute_of_subject<
+                typename traits::attribute_of<T, Context, Iterator>::type>
+        {};
+
+        ///////////////////////////////////////////////////////////////////////
+        template <typename Attribute, typename T, int N>
+        struct duplicate_sequence_attribute
+        {
+            typedef typename fusion::result_of::make_cons<
+                reference_wrapper<T const>
+              , typename duplicate_sequence_attribute<Attribute, T, N-1>::type
+            >::type type;
+
+            static type call(T const& t)
+            {
+                return fusion::make_cons(boost::cref(t)
+                  , duplicate_sequence_attribute<Attribute, T, N-1>::call(t));
+            }
+        };
+
+        template <typename Attribute, typename T>
+        struct duplicate_sequence_attribute<Attribute, T, 1>
+        {
+            typedef typename fusion::result_of::make_cons<
+                reference_wrapper<T const> >::type type;
+
+            static type call(T const& t)
+            {
+                return fusion::make_cons(boost::cref(t));
+            }
+        };
+
+        ///////////////////////////////////////////////////////////////////////
+        template <typename Attribute, typename T
+          , int N = attribute_count<Attribute>::value
+          , bool IsSequence = fusion::traits::is_sequence<Attribute>::value>
+        struct duplicate_attribute
+        {
+            BOOST_SPIRIT_ASSERT_MSG(N > 0, invalid_duplication_count, (Attribute));
+
+            typedef typename duplicate_sequence_attribute<Attribute, T, N>::type
+                cons_type;
+            typedef typename fusion::result_of::as_vector<cons_type>::type type;
+
+            static type call(T const& t)
+            {
+                return fusion::as_vector(
+                    duplicate_sequence_attribute<Attribute, T, N>::call(t));
+            }
+        };
+
+        template <typename Attribute, typename T>
+        struct duplicate_attribute<Attribute, T, 0, false>
+        {
+            typedef unused_type type;
+
+            static type call(T const&)
+            {
+                return unused;
+            }
+        };
+
+        template <typename Attribute, typename T, int N>
+        struct duplicate_attribute<Attribute, T, N, false>
+        {
+            typedef Attribute const& type;
+
+            static type call(T const& t)
+            {
+                return t;
+            }
+        };
+    }
+
+    template <typename Attribute, typename T>
+    inline typename detail::duplicate_attribute<Attribute, T>::type
+    duplicate_attribute(T const& t)
+    {
+        return detail::duplicate_attribute<Attribute, T>::call(t);
+    }
+
+    ///////////////////////////////////////////////////////////////////////////
+    // duplicate_directive duplicate its attribute for all elements of the
+    // subject generator without generating anything itself
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Subject>
+    struct duplicate_directive : unary_generator<duplicate_directive<Subject> >
+    {
+        typedef Subject subject_type;
+        typedef typename subject_type::properties properties;
+
+        duplicate_directive(Subject const& subject)
+          : subject(subject) {}
+
+        template <typename Context, typename Iterator = unused_type>
+        struct attribute
+          : detail::first_attribute_of<Subject, Context, Iterator>
+        {};
+
+        template <typename OutputIterator, typename Context, typename Delimiter
+          , typename Attribute>
+        bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d
+          , Attribute const& attr) const
+        {
+            typedef typename traits::attribute_of<Subject, Context>::type
+                subject_attr_type;
+            return subject.generate(sink, ctx, d
+              , duplicate_attribute<subject_attr_type>(attr));
+        }
+
+        template <typename Context>
+        info what(Context& context) const
+        {
+            return info("duplicate", subject.what(context));
+        }
+
+        Subject subject;
+    };
+
+    ///////////////////////////////////////////////////////////////////////////
+    // Generator generators: make_xxx function (objects)
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Subject, typename Modifiers>
+    struct make_directive<tag::duplicate, Subject, Modifiers>
+    {
+        typedef duplicate_directive<Subject> result_type;
+        result_type operator()(unused_type, Subject const& subject
+          , unused_type) const
+        {
+            return result_type(subject);
+        }
+    };
+}}}
+
+namespace boost { namespace spirit { namespace traits
+{
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Subject>
+    struct has_semantic_action<karma::duplicate_directive<Subject> >
+      : unary_has_semantic_action<Subject> {};
+
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Subject, typename Attribute, typename Context
+        , typename Iterator>
+    struct handles_container<karma::duplicate_directive<Subject>, Attribute
+        , Context, Iterator>
+      : unary_handles_container<Subject, Attribute, Context, Iterator> {};
+}}}
+
+#endif