Subject: [Boost-commit] svn:boost r55046 - in trunk/boost/spirit/home/karma: . directive
From: hartmut.kaiser_at_[hidden]
Date: 2009-07-20 11:37:11
Author: hkaiser
Date: 2009-07-20 11:37:09 EDT (Mon, 20 Jul 2009)
New Revision: 55046
URL: http://svn.boost.org/trac/boost/changeset/55046
Log:
Spirit: added karma::omit[] directive
Added:
trunk/boost/spirit/home/karma/directive/omit.hpp (contents, props changed)
Text files modified:
trunk/boost/spirit/home/karma/directive.hpp | 6 ++++++
1 files changed, 6 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 2009-07-20 11:37:09 EDT (Mon, 20 Jul 2009)
@@ -43,4 +43,10 @@
///////////////////////////////////////////////////////////////////////////////
#include <boost/spirit/home/karma/directive/repeat.hpp>
+///////////////////////////////////////////////////////////////////////////////
+// omit directive
+// omit[...]
+///////////////////////////////////////////////////////////////////////////////
+#include <boost/spirit/home/karma/directive/omit.hpp>
+
#endif
Added: trunk/boost/spirit/home/karma/directive/omit.hpp
==============================================================================
--- (empty file)
+++ trunk/boost/spirit/home/karma/directive/omit.hpp 2009-07-20 11:37:09 EDT (Mon, 20 Jul 2009)
@@ -0,0 +1,90 @@
+// 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_OMIT_JUL_20_2009_1008AM)
+#define SPIRIT_KARMA_OMIT_JUL_20_2009_1008AM
+
+#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::omit> // enables omit
+ : mpl::true_ {};
+
+}}
+
+namespace boost { namespace spirit { namespace karma
+{
+ using spirit::omit;
+ using spirit::omit_type;
+
+ ///////////////////////////////////////////////////////////////////////////
+ // omit_directive consumes the attribute of subject generator without
+ // generating anything
+ ///////////////////////////////////////////////////////////////////////////
+ template <typename Subject>
+ struct omit_directive : unary_generator<omit_directive<Subject> >
+ {
+ typedef Subject subject_type;
+
+ omit_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
+ {
+ return true;
+ }
+
+ template <typename Context>
+ info what(Context& context) const
+ {
+ return info("omit", subject.what(context));
+
+ }
+
+ Subject subject;
+ };
+
+ ///////////////////////////////////////////////////////////////////////////
+ // Generator generators: make_xxx function (objects)
+ ///////////////////////////////////////////////////////////////////////////
+ template <typename Subject, typename Modifiers>
+ struct make_directive<tag::omit, Subject, Modifiers>
+ {
+ typedef omit_directive<Subject> result_type;
+ result_type operator()(unused_type, Subject const& subject
+ , unused_type) const
+ {
+ return result_type(subject);
+ }
+ };
+
+}}}
+
+#endif