50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
// Copyright (c) 2001-2010 Hartmut Kaiser
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//
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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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// The purpose of this example is to show how a simple custom generator
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// directive can be written. We develop a custom generator allowing to wrap
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// the generated output after each 5th column.
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//
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// For more information see: http://boost-spirit.com/home/?page_id=659
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#include <boost/spirit/include/karma_generate_attr.hpp>
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#include <boost/spirit/include/karma_char.hpp>
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#include <boost/spirit/include/karma_operator.hpp>
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#include <boost/spirit/include/karma_numeric.hpp>
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#include <string>
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#include "simple_columns_directive.hpp"
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namespace karma = boost::spirit::karma;
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int main()
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{
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using custom_generator::columns;
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std::vector<int> v;
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for (int i = 0; i < 17; ++i)
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v.push_back(i);
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std::string generated;
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std::back_insert_iterator<std::string> sink(generated);
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bool result = karma::generate_delimited(
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sink, columns[*karma::int_], karma::space, v);
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if (result)
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{
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std::cout << "-------------------------------- \n";
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std::cout << "Generation succeeded\n";
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std::cout << "generated output: " << "\n" << generated << "\n";
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std::cout << "-------------------------------- \n";
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}
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else
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{
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std::cout << "-------------------------------- \n";
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std::cout << "Generation failed\n";
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std::cout << "-------------------------------- \n";
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}
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return 0;
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}
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