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

Add boost headers

+//  Copyright (c) 2001-2011 Joel de Guzman
+//  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_KLEENE_MAR_03_2007_0337AM)
+#define BOOST_SPIRIT_KARMA_KLEENE_MAR_03_2007_0337AM
+
+#if defined(_MSC_VER)
+#pragma once
+#endif
+
+#include <boost/spirit/home/karma/domain.hpp>
+#include <boost/spirit/home/karma/generator.hpp>
+#include <boost/spirit/home/karma/meta_compiler.hpp>
+#include <boost/spirit/home/karma/detail/output_iterator.hpp>
+#include <boost/spirit/home/karma/detail/indirect_iterator.hpp>
+#include <boost/spirit/home/karma/detail/get_stricttag.hpp>
+#include <boost/spirit/home/karma/detail/pass_container.hpp>
+#include <boost/spirit/home/karma/detail/fail_function.hpp>
+#include <boost/spirit/home/support/info.hpp>
+#include <boost/spirit/home/support/unused.hpp>
+#include <boost/spirit/home/support/container.hpp>
+#include <boost/spirit/home/support/handles_container.hpp>
+#include <boost/spirit/home/karma/detail/attributes.hpp>
+
+#include <boost/type_traits/add_const.hpp>
+
+namespace boost { namespace spirit
+{
+    ///////////////////////////////////////////////////////////////////////////
+    // Enablers
+    ///////////////////////////////////////////////////////////////////////////
+    template <>
+    struct use_operator<karma::domain, proto::tag::dereference> // enables *g
+      : mpl::true_ {};
+}}
+
+///////////////////////////////////////////////////////////////////////////////
+namespace boost { namespace spirit { namespace karma
+{
+    template <typename Subject, typename Strict, typename Derived>
+    struct base_kleene : unary_generator<Derived>
+    {
+    private:
+        // Ignore return value in relaxed mode (failing subject generators 
+        // are just skipped). This allows to selectively generate items in 
+        // the provided attribute.
+        template <typename F, typename Attribute>
+        bool generate_subject(F f, Attribute const&, mpl::false_) const
+        {
+            bool r = !f(subject);
+            if (!r && !f.is_at_end())
+                f.next();
+            return true;
+        }
+
+        template <typename F, typename Attribute>
+        bool generate_subject(F f, Attribute const&, mpl::true_) const
+        {
+            return !f(subject);
+        }
+
+        // There is no way to distinguish a failed generator from a 
+        // generator to be skipped. We assume the user takes responsibility 
+        // for ending the loop if no attribute is specified.
+        template <typename F>
+        bool generate_subject(F f, unused_type, mpl::false_) const
+        {
+            return !f(subject);
+        }
+
+//         template <typename F>
+//         bool generate_subject(F f, unused_type, mpl::true_) const
+//         {
+//             return !f(subject);
+//         }
+
+    public:
+        typedef Subject subject_type;
+        typedef typename subject_type::properties properties;
+
+        // Build a std::vector from the subject's attribute. Note
+        // that build_std_vector may return unused_type if the
+        // subject's attribute is an unused_type.
+        template <typename Context, typename Iterator>
+        struct attribute
+          : traits::build_std_vector<
+                typename traits::attribute_of<Subject, Context, Iterator>::type
+            >
+        {};
+
+        base_kleene(Subject const& subject)
+          : subject(subject) {}
+
+        template <
+            typename OutputIterator, typename Context, typename Delimiter
+          , typename Attribute>
+        bool generate(OutputIterator& sink, Context& ctx
+          , Delimiter const& d, Attribute const& attr) const
+        {
+            typedef detail::fail_function<
+                OutputIterator, Context, Delimiter> fail_function;
+
+            typedef typename traits::container_iterator<
+                typename add_const<Attribute>::type
+            >::type iterator_type;
+
+            typedef 
+                typename traits::make_indirect_iterator<iterator_type>::type 
+            indirect_iterator_type;
+            typedef detail::pass_container<
+                fail_function, Attribute, indirect_iterator_type, mpl::false_>
+            pass_container;
+
+            iterator_type it = traits::begin(attr);
+            iterator_type end = traits::end(attr);
+
+            pass_container pass(fail_function(sink, ctx, d), 
+                indirect_iterator_type(it), indirect_iterator_type(end));
+
+            // kleene fails only if the underlying output fails
+            while (!pass.is_at_end())
+            {
+                if (!generate_subject(pass, attr, Strict()))
+                    break;
+            }
+            return detail::sink_is_good(sink);
+        }
+
+        template <typename Context>
+        info what(Context& context) const
+        {
+            return info("kleene", subject.what(context));
+        }
+
+        Subject subject;
+    };
+
+    template <typename Subject>
+    struct kleene 
+      : base_kleene<Subject, mpl::false_, kleene<Subject> >
+    {
+        typedef base_kleene<Subject, mpl::false_, kleene> base_kleene_;
+
+        kleene(Subject const& subject)
+          : base_kleene_(subject) {}
+    };
+
+    template <typename Subject>
+    struct strict_kleene 
+      : base_kleene<Subject, mpl::true_, strict_kleene<Subject> >
+    {
+        typedef base_kleene<Subject, mpl::true_, strict_kleene> base_kleene_;
+
+        strict_kleene(Subject const& subject)
+          : base_kleene_(subject) {}
+    };
+
+    ///////////////////////////////////////////////////////////////////////////
+    // Generator generators: make_xxx function (objects)
+    ///////////////////////////////////////////////////////////////////////////
+    namespace detail
+    {
+        template <typename Subject, bool strict_mode = false>
+        struct make_kleene 
+          : make_unary_composite<Subject, kleene>
+        {};
+
+        template <typename Subject>
+        struct make_kleene<Subject, true> 
+          : make_unary_composite<Subject, strict_kleene>
+        {};
+    }
+
+    template <typename Subject, typename Modifiers>
+    struct make_composite<proto::tag::dereference, Subject, Modifiers>
+      : detail::make_kleene<Subject, detail::get_stricttag<Modifiers>::value>
+    {};
+}}}
+
+namespace boost { namespace spirit { namespace traits
+{
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Subject>
+    struct has_semantic_action<karma::kleene<Subject> >
+      : unary_has_semantic_action<Subject> {};
+
+    template <typename Subject>
+    struct has_semantic_action<karma::strict_kleene<Subject> >
+      : unary_has_semantic_action<Subject> {};
+
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Subject, typename Attribute, typename Context
+      , typename Iterator>
+    struct handles_container<karma::kleene<Subject>, Attribute
+          , Context, Iterator> 
+      : mpl::true_ {};
+
+    template <typename Subject, typename Attribute, typename Context
+      , typename Iterator>
+    struct handles_container<karma::strict_kleene<Subject>, Attribute
+          , Context, Iterator> 
+      : mpl::true_ {};
+}}}
+
+#endif