[Boost-commit] svn:boost r55386 - in trunk/boost/spirit: home/karma home/karma/directive home/support include

Subject: [Boost-commit] svn:boost r55386 - in trunk/boost/spirit: home/karma home/karma/directive home/support include
From: hartmut.kaiser_at_[hidden]
Date: 2009-08-03 11:47:27

Author: hkaiser
Date: 2009-08-03 11:47:26 EDT (Mon, 03 Aug 2009)
New Revision: 55386
URL: http://svn.boost.org/trac/boost/changeset/55386

Log:
Spirit: added karma directive buffer[]
Added:
   trunk/boost/spirit/home/karma/directive/buffer.hpp   (contents, props changed)
   trunk/boost/spirit/include/karma_buffer.hpp   (contents, props changed)
Text files modified: 
   trunk/boost/spirit/home/karma/directive.hpp          |     6 ++++++                                  
   trunk/boost/spirit/home/support/common_terminals.hpp |     1 +                                       
   2 files changed, 7 insertions(+), 0 deletions(-)

Modified: trunk/boost/spirit/home/karma/directive.hpp
==============================================================================
--- trunk/boost/spirit/home/karma/directive.hpp	(original)
+++ trunk/boost/spirit/home/karma/directive.hpp	2009-08-03 11:47:26 EDT (Mon, 03 Aug 2009)
@@ -49,4 +49,10 @@
 ///////////////////////////////////////////////////////////////////////////////
 #include <boost/spirit/home/karma/directive/omit.hpp>
 
+///////////////////////////////////////////////////////////////////////////////
+//  buffer directive
+//  buffer[...]
+///////////////////////////////////////////////////////////////////////////////
+#include <boost/spirit/home/karma/directive/buffer.hpp>
+
 #endif

Added: trunk/boost/spirit/home/karma/directive/buffer.hpp
==============================================================================
--- (empty file)
+++ trunk/boost/spirit/home/karma/directive/buffer.hpp	2009-08-03 11:47:26 EDT (Mon, 03 Aug 2009)
@@ -0,0 +1,104 @@
+//  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(SPIRIT_KARMA_BUFFER_AUG_03_2009_0949AM)
+#define SPIRIT_KARMA_BUFFER_AUG_03_2009_0949AM
+
+#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/support/unused.hpp>
+#include <boost/spirit/home/support/info.hpp>
+#include <boost/spirit/home/support/common_terminals.hpp>
+
+namespace boost { namespace spirit
+{
+    ///////////////////////////////////////////////////////////////////////////
+    // Enablers
+    ///////////////////////////////////////////////////////////////////////////
+    template <>
+    struct use_directive<karma::domain, tag::buffer> // enables buffer
+      : mpl::true_ {};
+
+}}
+
+namespace boost { namespace spirit { namespace karma
+{
+    using spirit::buffer;
+    using spirit::buffer_type;
+
+    ///////////////////////////////////////////////////////////////////////////
+    // omit_directive consumes the attribute of subject generator without
+    // generating anything
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Subject>
+    struct buffer_directive : unary_generator<buffer_directive<Subject> >
+    {
+        typedef Subject subject_type;
+        typedef mpl::int_<
+            subject_type::properties::value | 
+            generator_properties::countingbuffer
+        > properties;
+
+        buffer_directive(Subject const& subject)
+          : subject(subject) {}
+
+        template <typename Context, typename Iterator>
+        struct attribute
+        {
+            typedef typename
+                traits::attribute_of<subject_type, Context>::type
+            type;
+        };
+
+        template <typename OutputIterator, typename Context, typename Delimiter
+          , typename Attribute>
+        bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d
+          , Attribute const& attr) const
+        {
+            // wrap the given output iterator avoid output as long as embedded
+            // generator (subject) fails
+            detail::enable_buffering<OutputIterator> buffering(sink);
+            bool r = false;
+            {
+                detail::disable_counting<OutputIterator> nocounting(sink);
+                r = subject.generate(sink, ctx, d, attr);
+            }
+            if (r) 
+                buffering.buffer_copy();
+
+            return detail::sink_is_good(sink);
+        }
+
+        template <typename Context>
+        info what(Context& context) const
+        {
+            return info("buffer", subject.what(context));
+        }
+
+        Subject subject;
+    };
+
+    ///////////////////////////////////////////////////////////////////////////
+    // Generator generators: make_xxx function (objects)
+    ///////////////////////////////////////////////////////////////////////////
+    template <typename Subject, typename Modifiers>
+    struct make_directive<tag::buffer, Subject, Modifiers>
+    {
+        typedef buffer_directive<Subject> result_type;
+        result_type operator()(unused_type, Subject const& subject
+          , unused_type) const
+        {
+            return result_type(subject);
+        }
+    };
+
+}}}
+
+#endif

Modified: trunk/boost/spirit/home/support/common_terminals.hpp
==============================================================================
--- trunk/boost/spirit/home/support/common_terminals.hpp	(original)
+++ trunk/boost/spirit/home/support/common_terminals.hpp	2009-08-03 11:47:26 EDT (Mon, 03 Aug 2009)
@@ -30,6 +30,7 @@
         ( inf )
         ( eol )
         ( eoi )
+        ( buffer )
     )
 
     // Here we are reusing proto::lit

Added: trunk/boost/spirit/include/karma_buffer.hpp
==============================================================================
--- (empty file)
+++ trunk/boost/spirit/include/karma_buffer.hpp	2009-08-03 11:47:26 EDT (Mon, 03 Aug 2009)
@@ -0,0 +1,18 @@
+/*=============================================================================
+    Copyright (c) 2001-2009 Joel de Guzman
+    Copyright (c) 2001-2009 Hartmut Kaiser
+    http://spirit.sourceforge.net/
+
+    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)
+=============================================================================*/
+#ifndef BOOST_SPIRIT_INCLUDE_KARMA_BUFFER
+#define BOOST_SPIRIT_INCLUDE_KARMA_BUFFER
+
+#if defined(_MSC_VER)
+#pragma once
+#endif
+
+#include <boost/spirit/home/karma/directive/buffer.hpp>
+
+#endif