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f44479bcd3
It is better to manage warnings on our side to know what warnings we need to fix or suppress, and the only thing that header does is disabling deprecation warnings on MSVC and ICC which we would prefer to not show to users.
108 lines
3.6 KiB
C++
108 lines
3.6 KiB
C++
/*=============================================================================
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Copyright (c) 2001-2011 Hartmut Kaiser
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http://spirit.sourceforge.net/
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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//[customize_karma_embedded_container_includes
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#include <boost/spirit/include/karma.hpp>
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#include <iostream>
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#include <vector>
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//]
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///////////////////////////////////////////////////////////////////////////////
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//[customize_karma_embedded_container_data
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namespace client
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{
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struct embedded_container
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{
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// expose the iterator of the embedded vector as our iterator
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typedef std::vector<int>::const_iterator iterator;
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// expose the type of the held data elements as our type
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typedef std::vector<int>::value_type type;
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// this is the vector holding the actual elements we need to generate
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// output from
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std::vector<int> data;
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};
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}
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//]
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//[customize_karma_embedded_container_traits
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// All specializations of attribute customization points have to be placed into
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// the namespace boost::spirit::traits.
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//
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// Note that all templates below are specialized using the 'const' type.
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// This is necessary as all attributes in Karma are 'const'.
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namespace boost { namespace spirit { namespace traits
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{
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// The specialization of the template 'is_container<>' will tell the
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// library to treat the type 'client::embedded_container' as a
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// container holding the items to generate output from.
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template <>
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struct is_container<client::embedded_container const>
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: mpl::true_
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{};
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// The specialization of the template 'container_iterator<>' will be
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// invoked by the library to evaluate the iterator type to be used
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// for iterating the data elements in the container. We simply return
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// the type of the iterator exposed by the embedded 'std::vector<int>'.
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template <>
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struct container_iterator<client::embedded_container const>
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{
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typedef client::embedded_container::iterator type;
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};
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// The specialization of the templates 'begin_container<>' and
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// 'end_container<>' below will be used by the library to get the iterators
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// pointing to the begin and the end of the data to generate output from.
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// These specializations simply return the 'begin' and 'end' iterators as
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// exposed by the embedded 'std::vector<int>'.
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//
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// The passed argument refers to the attribute instance passed to the list
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// generator.
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template <>
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struct begin_container<client::embedded_container const>
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{
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static client::embedded_container::iterator
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call(client::embedded_container const& d)
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{
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return d.data.begin();
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}
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};
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template <>
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struct end_container<client::embedded_container const>
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{
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static client::embedded_container::iterator
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call(client::embedded_container const& d)
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{
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return d.data.end();
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}
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};
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}}}
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//]
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///////////////////////////////////////////////////////////////////////////////
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namespace karma = boost::spirit::karma;
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int main()
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{
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//[customize_karma_embedded_container
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client::embedded_container d1; // create some test data
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d1.data.push_back(1);
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d1.data.push_back(2);
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d1.data.push_back(3);
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// use the instance of an 'client::embedded_container' instead of a
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// STL vector
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std::cout << karma::format(karma::int_ % ", ", d1) << std::endl; // prints: '1, 2, 3'
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//]
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return 0;
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}
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