ceph/src/boost/libs/spirit/include/boost/spirit/home/karma/directive/verbatim.hpp

   1 //  Copyright (c) 2001-2011 Hartmut Kaiser
   2 //
   3 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #if !defined(BOOST_SPIRIT_KARMA_VERBATIM_MAR_02_2007_0303PM)
   7 #define BOOST_SPIRIT_KARMA_VERBATIM_MAR_02_2007_0303PM
   8
   9 #if defined(_MSC_VER)
  10 #pragma once
  11 #endif
  12
  13 #include <boost/spirit/home/karma/meta_compiler.hpp>
  14 #include <boost/spirit/home/karma/generator.hpp>
  15 #include <boost/spirit/home/karma/domain.hpp>
  16 #include <boost/spirit/home/karma/detail/unused_delimiter.hpp>
  17 #include <boost/spirit/home/karma/delimit_out.hpp>
  18 #include <boost/spirit/home/karma/auxiliary/lazy.hpp>
  19 #include <boost/spirit/home/support/unused.hpp>
  20 #include <boost/spirit/home/support/common_terminals.hpp>
  21 #include <boost/spirit/home/support/has_semantic_action.hpp>
  22 #include <boost/spirit/home/support/handles_container.hpp>
  23 #include <boost/spirit/home/karma/detail/attributes.hpp>
  24 #include <boost/spirit/home/support/info.hpp>
  25
  26 namespace boost { namespace spirit
  27 {
  28     ///////////////////////////////////////////////////////////////////////////
  29     // Enablers
  30     ///////////////////////////////////////////////////////////////////////////
  31     template <>
  32     struct use_directive<karma::domain, tag::verbatim>   // enables verbatim[]
  33       : mpl::true_ {};
  34
  35 }}
  36
  37 namespace boost { namespace spirit { namespace karma
  38 {
  39 #ifndef BOOST_SPIRIT_NO_PREDEFINED_TERMINALS
  40     using spirit::verbatim;
  41 #endif
  42     using spirit::verbatim_type;
  43
  44     ///////////////////////////////////////////////////////////////////////////
  45     //  The verbatim generator is used for verbatim[...] directives.
  46     ///////////////////////////////////////////////////////////////////////////
  47     template <typename Subject>
  48     struct verbatim_generator : unary_generator<verbatim_generator<Subject> >
  49     {
  50         typedef Subject subject_type;
  51         typedef typename subject_type::properties properties;
  52
  53         template <typename Context, typename Iterator>
  54         struct attribute
  55           : traits::attribute_of<subject_type, Context, Iterator>
  56         {};
  57
  58         verbatim_generator(Subject const& subject)
  59           : subject(subject) {}
  60
  61         template <typename OutputIterator, typename Context, typename Delimiter
  62           , typename Attribute>
  63         bool generate(OutputIterator& sink, Context& ctx, Delimiter const& d
  64           , Attribute const& attr) const
  65         {
  66             //  the verbatim generator simply dispatches to the embedded
  67             //  generator while supplying unused_delimiter as the new delimiter
  68             //  to avoid delimiting down the generator stream
  69             typedef detail::unused_delimiter<Delimiter> unused_delimiter;
  70
  71             return subject.generate(sink, ctx, unused_delimiter(d), attr) &&
  72                    karma::delimit_out(sink, d);     // always do post-delimiting
  73         }
  74
  75         template <typename Context>
  76         info what(Context& context) const
  77         {
  78             return info("verbatim", subject.what(context));
  79         }
  80
  81         Subject subject;
  82     };
  83
  84     ///////////////////////////////////////////////////////////////////////////
  85     // Generator generators: make_xxx function (objects)
  86     ///////////////////////////////////////////////////////////////////////////
  87     template <typename Subject, typename Modifiers>
  88     struct make_directive<tag::verbatim, Subject, Modifiers>
  89     {
  90         typedef verbatim_generator<Subject> result_type;
  91         result_type operator()(unused_type, Subject const& subject, unused_type) const
  92         {
  93             return result_type(subject);
  94         }
  95     };
  96
  97 }}}
  98
  99 namespace boost { namespace spirit { namespace traits
 100 {
 101     ///////////////////////////////////////////////////////////////////////////
 102     template <typename Subject>
 103     struct has_semantic_action<karma::verbatim_generator<Subject> >
 104       : unary_has_semantic_action<Subject> {};
 105
 106     ///////////////////////////////////////////////////////////////////////////
 107     template <typename Subject, typename Attribute, typename Context
 108         , typename Iterator>
 109     struct handles_container<karma::verbatim_generator<Subject>, Attribute
 110         , Context, Iterator>
 111       : unary_handles_container<Subject, Attribute, Context, Iterator> {};
 112 }}}
 113
 114 #endif